122 files changed, 5209 insertions, 3276 deletions
diff --git a/.cargo/config b/.cargo/config
index 9f9b24a49..3812e1e2d 100644
--- a/.cargo/config
+++ b/.cargo/config
@@ -1,25 +1,4 @@
 [alias]
-# Automatically generates the ast and syntax kinds files
+xtask = "run --package xtask --bin xtask --"
-gen-syntax   = "run --package ra_tools --bin ra_tools -- gen-syntax"
-# Extracts the tests from
+install-ra = "run --package xtask --bin xtask -- install" # for backwards compat
-gen-tests    = "run --package ra_tools --bin ra_tools -- gen-tests"
-build-website = "run --package website-gen"
-# Installs the visual studio code extension
-install-ra   = "run --package ra_tools --bin ra_tools -- install-ra"
-install-code = "run --package ra_tools --bin ra_tools -- install-ra" # just an alias
-# Formats the full repository or installs the git hook to do it automatically.
-format       = "run --package ra_tools --bin ra_tools -- format"
-format-hook  = "run --package ra_tools --bin ra_tools -- format-hook"
-# Run clippy
-lint         = "run --package ra_tools --bin ra_tools -- lint"
-# Runs the fuzzing test suite (currently only parser)
-fuzz-tests   = "run --package ra_tools --bin ra_tools -- fuzz-tests"
-# Parse a file. This should be piped the file contents
-parse        = "run --package ra_cli -- parse"
diff --git a/.travis.yml b/.travis.yml
index d4cf71ab5..7d66f72d8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,7 +14,7 @@ matrix:
          script:
              - rustup component add rustfmt
              - rustup component add rust-src
-              - printf "\n\n[profile.dev]\ndebug = false\n" >> Cargo.toml
+              - sed -i "s/debug = 1/debug = false/g" Cargo.toml
              - cargo test --no-run  # let's measure compile time separately
              - cargo test
          env:
@@ -28,7 +28,7 @@ matrix:
          language: rust
          rust: stable
          script:
-              - cargo build-website
+              - cargo doc --all --no-deps
          env:
              - RUSTFLAGS="-D warnings", CARGO_INCREMENTAL=0
@@ -59,7 +59,7 @@ deploy:
    skip-cleanup: true
    github-token: $DOCS_TOKEN  # Set in the settings page of your repository, as a secure variable
    keep-history: false
-    local-dir: target/website/
+    local-dir: target/doc
    on:
        branch: master
        condition: $DEPLOY_DOCS = 1
diff --git a/Cargo.lock b/Cargo.lock
index a5a43cffc..634480e5f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -10,44 +10,49 @@ dependencies = [
 [[package]]
 name = "arrayvec"
-version = "0.4.11"
+version = "0.4.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "nodrop 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "nodrop 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 [[package]]
+name = "arrayvec"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+[[package]]
 name = "atty"
 version = "0.2.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 [[package]]
 name = "autocfg"
-version = "0.1.6"
+version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "backtrace"
-version = "0.3.38"
+version = "0.3.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "backtrace-sys 0.1.31 (registry+https://github.com/rust-lang/crates.io-index)",
+ "backtrace-sys 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
 "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 "rustc-demangle 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 [[package]]
 name = "backtrace-sys"
-version = "0.1.31"
+version = "0.1.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cc 1.0.45 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 [[package]]
@@ -73,7 +78,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "bitflags"
-version = "1.2.0"
+version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
@@ -91,27 +96,26 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "c2-chacha"
-version = "0.2.2"
+version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ppv-lite86 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "ppv-lite86 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 [[package]]
 name = "cargo_metadata"
-version = "0.8.2"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
 "semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
 "serde_derive 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 [[package]]
 name = "cc"
-version = "1.0.45"
+version = "1.0.46"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
@@ -122,17 +126,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "chalk-engine"
 version = "0.9.0"
-source = "git+https://github.com/rust-lang/chalk.git#df09cc603c0cff9ed95e5554055d483fdd756fbc"
+source = "git+https://github.com/rust-lang/chalk.git#13303bb0067c6ed0572322080ae367ee38f9e7c9"
 dependencies = [
 "chalk-macros 0.1.1 (git+https://github.com/rust-lang/chalk.git)",
 "rustc-hash 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "stacker 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "stacker 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 [[package]]
 name = "chalk-ir"
 version = "0.1.0"
-source = "git+https://github.com/rust-lang/chalk.git#df09cc603c0cff9ed95e5554055d483fdd756fbc"
+source = "git+https://github.com/rust-lang/chalk.git#13303bb0067c6ed0572322080ae367ee38f9e7c9"
 dependencies = [
 "chalk-engine 0.9.0 (git+https://github.com/rust-lang/chalk.git)",
 "chalk-macros 0.1.1 (git+https://github.com/rust-lang/chalk.git)",
@@ -142,7 +146,7 @@ dependencies = [
 [[package]]
 name = "chalk-macros"
 version = "0.1.1"
-source = "git+https://github.com/rust-lang/chalk.git#df09cc603c0cff9ed95e5554055d483fdd756fbc"
+source = "git+https://github.com/rust-lang/chalk.git#13303bb0067c6ed0572322080ae367ee38f9e7c9"
 dependencies = [
 "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -150,7 +154,7 @@ dependencies = [
 [[package]]
 name = "chalk-rust-ir"
 version = "0.1.0"
-source = "git+https://github.com/rust-lang/chalk.git#df09cc603c0cff9ed95e5554055d483fdd756fbc"
+source = "git+https://github.com/rust-lang/chalk.git#13303bb0067c6ed0572322080ae367ee38f9e7c9"
 dependencies = [
 "chalk-engine 0.9.0 (git+https://github.com/rust-lang/chalk.git)",
 "chalk-ir 0.1.0 (git+https://github.com/rust-lang/chalk.git)",
@@ -160,14 +164,13 @@ dependencies = [
 [[package]]
 name = "chalk-solve"
 version = "0.1.0"
-source = "git+https://github.com/rust-lang/chalk.git#df09cc603c0cff9ed95e5554055d483fdd756fbc"
+source = "git+https://github.com/rust-lang/chalk.git#13303bb0067c6ed0572322080ae367ee38f9e7c9"
 dependencies = [
 "chalk-engine 0.9.0 (git+https://github.com/rust-lang/chalk.git)",
 "chalk-ir 0.1.0 (git+https://github.com/rust-lang/chalk.git)",
 "chalk-macros 0.1.1 (git+https://github.com/rust-lang/chalk.git)",
 "chalk-rust-ir 0.1.0 (git+https://github.com/rust-lang/chalk.git)",
- "derive-new 0.5.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ena 0.13.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "ena 0.13.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "itertools 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "petgraph 0.4.13 (registry+https://github.com/rust-lang/crates.io-index)",
 "rustc-hash 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -178,7 +181,7 @@ name = "chrono"
 version = "0.4.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 "num-integer 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)",
 "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 "time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -191,7 +194,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
 "atty 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)",
 "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -200,7 +203,7 @@ name = "cloudabi"
 version = "0.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bitflags 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 [[package]]
@@ -211,7 +214,22 @@ dependencies = [
 "clicolors-control 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "encode_unicode 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
 "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "termios 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-width 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+[[package]]
+name = "console"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "clicolors-control 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "encode_unicode 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 "regex 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "termios 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "unicode-width 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -253,7 +271,7 @@ name = "crossbeam-epoch"
 version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "arrayvec 0.4.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "arrayvec 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)",
 "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
 "crossbeam-utils 0.6.6 (registry+https://github.com/rust-lang/crates.io-index)",
 "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -283,7 +301,7 @@ name = "derive-new"
 version = "0.5.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
 "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
 "syn 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -310,7 +328,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "ena"
-version = "0.13.0"
+version = "0.13.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
 "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -327,7 +345,7 @@ version = "0.2.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
 "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 "redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
 "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -369,7 +387,7 @@ name = "fsevent"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bitflags 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "fsevent-sys 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -378,7 +396,7 @@ name = "fsevent-sys"
 version = "2.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 [[package]]
@@ -399,7 +417,7 @@ name = "fuchsia-zircon"
 version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bitflags 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "fuchsia-zircon-sys 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -414,7 +432,7 @@ version = "0.1.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
 "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 "wasi 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -455,18 +473,20 @@ dependencies = [
 [[package]]
 name = "indexmap"
-version = "1.2.0"
+version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 [[package]]
 name = "indicatif"
-version = "0.11.0"
+version = "0.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "console 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "console 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "number_prefix 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "number_prefix 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "parking_lot 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "regex 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -475,9 +495,9 @@ name = "inotify"
 version = "0.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bitflags 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "inotify-sys 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 [[package]]
@@ -485,7 +505,7 @@ name = "inotify-sys"
 version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 [[package]]
@@ -497,18 +517,17 @@ dependencies = [
 "difference 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_yaml 0.8.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_yaml 0.8.11 (registry+https://github.com/rust-lang/crates.io-index)",
 "uuid 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 [[package]]
 name = "iovec"
-version = "0.1.2"
+version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 [[package]]
@@ -530,7 +549,7 @@ version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
 "jemalloc-sys 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 "paste 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -539,9 +558,9 @@ name = "jemalloc-sys"
 version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cc 1.0.45 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
 "fs_extra 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 [[package]]
@@ -550,7 +569,7 @@ version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
 "jemalloc-sys 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 [[package]]
@@ -589,7 +608,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "libc"
-version = "0.2.62"
+version = "0.2.65"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
@@ -621,7 +640,7 @@ dependencies = [
 "crossbeam-channel 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
 "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
 "serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 [[package]]
@@ -629,9 +648,9 @@ name = "lsp-types"
 version = "0.61.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bitflags 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)",
 "serde_repr 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
 "url 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -661,9 +680,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
 "fuchsia-zircon 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
 "fuchsia-zircon-sys 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "iovec 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "iovec 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
 "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
 "miow 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "net2 0.2.33 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -699,27 +718,27 @@ version = "0.2.33"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
 "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 [[package]]
 name = "nodrop"
-version = "0.1.13"
+version = "0.1.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "notify"
-version = "4.0.13"
+version = "4.0.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bitflags 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "filetime 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
 "fsevent 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "fsevent-sys 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "inotify 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 "mio 0.6.19 (registry+https://github.com/rust-lang/crates.io-index)",
 "mio-extras 2.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
 "walkdir 2.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -731,7 +750,7 @@ name = "num-integer"
 version = "0.1.41"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
 "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -740,7 +759,7 @@ name = "num-traits"
 version = "0.2.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 [[package]]
@@ -748,16 +767,13 @@ name = "num_cpus"
 version = "1.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 [[package]]
 name = "number_prefix"
-version = "0.2.8"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
-]
 [[package]]
 name = "once_cell"
@@ -786,7 +802,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
 "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
 "cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 "redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
 "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
 "smallvec 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -799,7 +815,7 @@ version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
 "paste-impl 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "proc-macro-hack 0.5.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro-hack 0.5.11 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 [[package]]
@@ -807,8 +823,8 @@ name = "paste-impl"
 version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro-hack 0.5.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro-hack 0.5.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "proc-macro2 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
 "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
 "syn 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -834,22 +850,22 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "ppv-lite86"
-version = "0.2.5"
+version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "proc-macro-hack"
-version = "0.5.9"
+version = "0.5.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
 "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
 "syn 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 [[package]]
 name = "proc-macro2"
-version = "1.0.5"
+version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
 "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -861,7 +877,7 @@ version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
 "bit-set 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "bitflags 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
 "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -873,6 +889,14 @@ dependencies = [
 ]
 [[package]]
+name = "psm"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cc 1.0.46 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+[[package]]
 name = "quick-error"
 version = "1.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -882,7 +906,7 @@ name = "quote"
 version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 [[package]]
@@ -893,17 +917,15 @@ version = "0.1.0"
 name = "ra_assists"
 version = "0.1.0"
 dependencies = [
- "arrayvec 0.4.11 (registry+https://github.com/rust-lang/crates.io-index)",
 "format-buf 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "itertools 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "join_to_string 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "once_cell 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "ra_db 0.1.0",
 "ra_fmt 0.1.0",
 "ra_hir 0.1.0",
 "ra_syntax 0.1.0",
 "ra_text_edit 0.1.0",
- "rustc-hash 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc_lexer 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "test_utils 0.1.0",
 ]
@@ -917,7 +939,7 @@ dependencies = [
 "ra_hir 0.1.0",
 "ra_ide_api 0.1.0",
 "ra_project_model 0.1.0",
- "ra_vfs 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ra_vfs 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "ra_vfs_glob 0.1.0",
 "rustc-hash 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -937,7 +959,7 @@ name = "ra_cli"
 version = "0.1.0"
 dependencies = [
 "flexi_logger 0.14.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "indicatif 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "indicatif 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "pico-args 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "ra_batch 0.1.0",
 "ra_db 0.1.0",
@@ -954,9 +976,9 @@ dependencies = [
 "ra_cfg 0.1.0",
 "ra_prof 0.1.0",
 "ra_syntax 0.1.0",
- "relative-path 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "relative-path 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "rustc-hash 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "salsa 0.13.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "salsa 0.13.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 [[package]]
@@ -971,11 +993,11 @@ dependencies = [
 name = "ra_hir"
 version = "0.1.0"
 dependencies = [
- "arrayvec 0.4.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "arrayvec 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "chalk-ir 0.1.0 (git+https://github.com/rust-lang/chalk.git)",
 "chalk-rust-ir 0.1.0 (git+https://github.com/rust-lang/chalk.git)",
 "chalk-solve 0.1.0 (git+https://github.com/rust-lang/chalk.git)",
- "ena 0.13.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ena 0.13.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "insta 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "lalrpop-intern 0.15.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -988,7 +1010,7 @@ dependencies = [
 "ra_prof 0.1.0",
 "ra_syntax 0.1.0",
 "ra_tt 0.1.0",
- "relative-path 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "relative-path 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "rustc-hash 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "test_utils 0.1.0",
 ]
@@ -1003,6 +1025,7 @@ dependencies = [
 "itertools 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "join_to_string 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
 "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "once_cell 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "proptest 0.9.4 (registry+https://github.com/rust-lang/crates.io-index)",
 "ra_assists 0.1.0",
 "ra_cfg 0.1.0",
@@ -1014,7 +1037,7 @@ dependencies = [
 "ra_text_edit 0.1.0",
 "rand 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
 "rayon 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "relative-path 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "relative-path 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "rustc-hash 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "superslice 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "test_utils 0.1.0",
@@ -1032,19 +1055,17 @@ dependencies = [
 "lsp-server 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "lsp-types 0.61.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "parking_lot 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "ra_cfg 0.1.0",
- "ra_db 0.1.0",
 "ra_ide_api 0.1.0",
 "ra_prof 0.1.0",
 "ra_project_model 0.1.0",
 "ra_syntax 0.1.0",
 "ra_text_edit 0.1.0",
- "ra_vfs 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ra_vfs 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "ra_vfs_glob 0.1.0",
- "relative-path 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "relative-path 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "rustc-hash 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)",
 "tempfile 3.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "test_utils 0.1.0",
 "threadpool 1.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1054,7 +1075,6 @@ dependencies = [
 name = "ra_mbe"
 version = "0.1.0"
 dependencies = [
- "itertools 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
 "ra_parser 0.1.0",
 "ra_syntax 0.1.0",
@@ -1075,7 +1095,7 @@ dependencies = [
 name = "ra_prof"
 version = "0.1.0"
 dependencies = [
- "backtrace 0.3.38 (registry+https://github.com/rust-lang/crates.io-index)",
+ "backtrace 0.3.40 (registry+https://github.com/rust-lang/crates.io-index)",
 "itertools 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "jemalloc-ctl 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
 "jemallocator 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1086,21 +1106,21 @@ dependencies = [
 name = "ra_project_model"
 version = "0.1.0"
 dependencies = [
- "cargo_metadata 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cargo_metadata 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
 "ra_arena 0.1.0",
 "ra_cfg 0.1.0",
 "ra_db 0.1.0",
 "rustc-hash 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 [[package]]
 name = "ra_syntax"
 version = "0.1.0"
 dependencies = [
- "arrayvec 0.4.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "arrayvec 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "itertools 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "once_cell 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "ra_parser 0.1.0",
@@ -1108,7 +1128,7 @@ dependencies = [
 "rowan 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
 "rustc-hash 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "rustc_lexer 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "smol_str 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smol_str 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)",
 "test_utils 0.1.0",
 "walkdir 2.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -1123,36 +1143,23 @@ dependencies = [
 ]
 [[package]]
-name = "ra_tools"
-version = "0.1.0"
-dependencies = [
- "itertools 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "pico-args 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "proc-macro2 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "ron 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
- "walkdir 2.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-[[package]]
 name = "ra_tt"
 version = "0.1.0"
 dependencies = [
- "smol_str 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "smol_str 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 [[package]]
 name = "ra_vfs"
-version = "0.4.0"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
 "crossbeam-channel 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
 "jod-thread 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "notify 4.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "notify 4.0.14 (registry+https://github.com/rust-lang/crates.io-index)",
 "parking_lot 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "relative-path 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "relative-path 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "rustc-hash 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "walkdir 2.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -1162,7 +1169,7 @@ name = "ra_vfs_glob"
 version = "0.1.0"
 dependencies = [
 "globset 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "ra_vfs 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ra_vfs 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 [[package]]
@@ -1170,8 +1177,8 @@ name = "rand"
 version = "0.6.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.65 (registry+https://github.com/rust-lang/crates.io-index)",
 "rand_chacha 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "rand_core 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
 "rand_hc 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1189,7 +1196,7 @@ version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
 "getrandom 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
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@@ -1916,22 +1933,22 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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diff --git a/Cargo.toml b/Cargo.toml
index 317c63795..97c02b40f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,5 +1,8 @@
 [workspace]
-members = [ "crates/*", "website/website-gen" ]
+members = [ "crates/*", "xtask/" ]
+[profile.dev]
+debug = 1 # only line info
 [profile.release]
 incremental = true
diff --git a/README.md b/README.md
index e249c6486..f5ee4263d 100644
--- a/README.md
+++ b/README.md
@@ -33,10 +33,10 @@ To quickly install rust-analyzer with VS Code extension with standard setup
 $ git clone https://github.com/rust-analyzer/rust-analyzer && cd rust-analyzer
 # install both the language server and VS Code extension
-$ cargo install-ra
+$ cargo xtask install
 # alternatively, install only the server. Binary name is `ra_lsp_server`.
-$ cargo install-ra --server
+$ cargo xtask install --server
 ```
 For non-standard setup of VS Code and other editors, see [./docs/user](./docs/user).
@@ -59,7 +59,7 @@ https://rust-lang.zulipchat.com/#narrow/stream/185405-t-compiler.2Frls-2.2E0
 ## Quick Links
 * Work List: https://paper.dropbox.com/doc/RLS-2.0-work-list--AZ3BgHKKCtqszbsi3gi6sjchAQ-42vbnxzuKq2lKwW0mkn8Y
-* API docs: https://rust-analyzer.github.io/rust-analyzer/api-docs/ra_ide_api/
+* API docs: https://rust-analyzer.github.io/rust-analyzer/ra_ide_api/
 * CI: https://travis-ci.org/rust-analyzer/rust-analyzer
 ## License
diff --git a/crates/ra_assists/Cargo.toml b/crates/ra_assists/Cargo.toml
index 02966bbda..beebccbd9 100644
--- a/crates/ra_assists/Cargo.toml
+++ b/crates/ra_assists/Cargo.toml
@@ -6,11 +6,9 @@ authors = ["rust-analyzer developers"]
 [dependencies]
 format-buf = "1.0.0"
-once_cell = "1.0.1"
 join_to_string = "0.1.3"
 itertools = "0.8.0"
-arrayvec = "0.4.10"
+rustc_lexer = "0.1.0"
-rustc-hash = "1.0.1"
 ra_syntax = { path = "../ra_syntax" }
 ra_text_edit = { path = "../ra_text_edit" }
diff --git a/crates/ra_assists/src/assist_ctx.rs b/crates/ra_assists/src/assist_ctx.rs
index 189cad7d0..e270c5d60 100644
--- a/crates/ra_assists/src/assist_ctx.rs
+++ b/crates/ra_assists/src/assist_ctx.rs
@@ -138,6 +138,7 @@ impl AssistBuilder {
    /// Replaces specified `node` of text with a given string, reindenting the
    /// string to maintain `node`'s existing indent.
+    // FIXME: remove in favor of ra_syntax::edit::IndentLevel::increase_indent
    pub(crate) fn replace_node_and_indent(
        &mut self,
        node: &SyntaxNode,
diff --git a/crates/ra_assists/src/assists/early_return.rs b/crates/ra_assists/src/assists/early_return.rs
new file mode 100644
index 000000000..8c975714c
--- /dev/null
+++ b/crates/ra_assists/src/assists/early_return.rs
@@ -0,0 +1,276 @@
+//! FIXME: write short doc here
+use crate::{
+    assist_ctx::{Assist, AssistCtx},
+    AssistId,
+};
+use hir::db::HirDatabase;
+use ra_syntax::{
+    algo::replace_children,
+    ast::edit::IndentLevel,
+    ast::make,
+    ast::Block,
+    ast::ContinueExpr,
+    ast::IfExpr,
+    ast::ReturnExpr,
+    AstNode,
+    SyntaxKind::{FN_DEF, LOOP_EXPR, L_CURLY, R_CURLY, WHILE_EXPR, WHITESPACE},
+};
+use std::ops::RangeInclusive;
+pub(crate) fn convert_to_guarded_return(mut ctx: AssistCtx<impl HirDatabase>) -> Option<Assist> {
+    let if_expr: IfExpr = ctx.node_at_offset()?;
+    let expr = if_expr.condition()?.expr()?;
+    let then_block = if_expr.then_branch()?.block()?;
+    if if_expr.else_branch().is_some() {
+        return None;
+    }
+    let parent_block = if_expr.syntax().parent()?.ancestors().find_map(Block::cast)?;
+    if parent_block.expr()? != if_expr.clone().into() {
+        return None;
+    }
+    // check for early return and continue
+    let first_in_then_block = then_block.syntax().first_child()?.clone();
+    if ReturnExpr::can_cast(first_in_then_block.kind())
+        || ContinueExpr::can_cast(first_in_then_block.kind())
+        || first_in_then_block
+            .children()
+            .any(|x| ReturnExpr::can_cast(x.kind()) || ContinueExpr::can_cast(x.kind()))
+    {
+        return None;
+    }
+    let parent_container = parent_block.syntax().parent()?.parent()?;
+    let early_expression = match parent_container.kind() {
+        WHILE_EXPR | LOOP_EXPR => Some("continue;"),
+        FN_DEF => Some("return;"),
+        _ => None,
+    }?;
+    if then_block.syntax().first_child_or_token().map(|t| t.kind() == L_CURLY).is_none() {
+        return None;
+    }
+    then_block.syntax().last_child_or_token().filter(|t| t.kind() == R_CURLY)?;
+    let cursor_position = ctx.frange.range.start();
+    ctx.add_action(AssistId("convert_to_guarded_return"), "convert to guarded return", |edit| {
+        let if_indent_level = IndentLevel::from_node(&if_expr.syntax());
+        let new_if_expr =
+            if_indent_level.increase_indent(make::if_expression(&expr, early_expression));
+        let then_block_items = IndentLevel::from(1).decrease_indent(then_block.clone());
+        let end_of_then = then_block_items.syntax().last_child_or_token().unwrap();
+        let end_of_then =
+            if end_of_then.prev_sibling_or_token().map(|n| n.kind()) == Some(WHITESPACE) {
+                end_of_then.prev_sibling_or_token().unwrap()
+            } else {
+                end_of_then
+            };
+        let mut new_if_and_then_statements = new_if_expr.syntax().children_with_tokens().chain(
+            then_block_items
+                .syntax()
+                .children_with_tokens()
+                .skip(1)
+                .take_while(|i| *i != end_of_then),
+        );
+        let new_block = replace_children(
+            &parent_block.syntax(),
+            RangeInclusive::new(
+                if_expr.clone().syntax().clone().into(),
+                if_expr.syntax().clone().into(),
+            ),
+            &mut new_if_and_then_statements,
+        );
+        edit.target(if_expr.syntax().text_range());
+        edit.replace_ast(parent_block, Block::cast(new_block).unwrap());
+        edit.set_cursor(cursor_position);
+    });
+    ctx.build()
+}
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::helpers::{check_assist, check_assist_not_applicable};
+    #[test]
+    fn convert_inside_fn() {
+        check_assist(
+            convert_to_guarded_return,
+            r#"
+            fn main() {
+                bar();
+                if<|> true {
+                    foo();
+                    //comment
+                    bar();
+                }
+            }
+            "#,
+            r#"
+            fn main() {
+                bar();
+                if<|> !true {
+                    return;
+                }
+                foo();
+                //comment
+                bar();
+            }
+            "#,
+        );
+    }
+    #[test]
+    fn convert_inside_while() {
+        check_assist(
+            convert_to_guarded_return,
+            r#"
+            fn main() {
+                while true {
+                    if<|> true {
+                        foo();
+                        bar();
+                    }
+                }
+            }
+            "#,
+            r#"
+            fn main() {
+                while true {
+                    if<|> !true {
+                        continue;
+                    }
+                    foo();
+                    bar();
+                }
+            }
+            "#,
+        );
+    }
+    #[test]
+    fn convert_inside_loop() {
+        check_assist(
+            convert_to_guarded_return,
+            r#"
+            fn main() {
+                loop {
+                    if<|> true {
+                        foo();
+                        bar();
+                    }
+                }
+            }
+            "#,
+            r#"
+            fn main() {
+                loop {
+                    if<|> !true {
+                        continue;
+                    }
+                    foo();
+                    bar();
+                }
+            }
+            "#,
+        );
+    }
+    #[test]
+    fn ignore_already_converted_if() {
+        check_assist_not_applicable(
+            convert_to_guarded_return,
+            r#"
+            fn main() {
+                if<|> true {
+                    return;
+                }
+            }
+            "#,
+        );
+    }
+    #[test]
+    fn ignore_already_converted_loop() {
+        check_assist_not_applicable(
+            convert_to_guarded_return,
+            r#"
+            fn main() {
+                loop {
+                    if<|> true {
+                        continue;
+                    }
+                }
+            }
+            "#,
+        );
+    }
+    #[test]
+    fn ignore_return() {
+        check_assist_not_applicable(
+            convert_to_guarded_return,
+            r#"
+            fn main() {
+                if<|> true {
+                    return
+                }
+            }
+            "#,
+        );
+    }
+    #[test]
+    fn ignore_else_branch() {
+        check_assist_not_applicable(
+            convert_to_guarded_return,
+            r#"
+            fn main() {
+                if<|> true {
+                    foo();
+                } else {
+                    bar()
+                }
+            }
+            "#,
+        );
+    }
+    #[test]
+    fn ignore_statements_aftert_if() {
+        check_assist_not_applicable(
+            convert_to_guarded_return,
+            r#"
+            fn main() {
+                if<|> true {
+                    foo();
+                }
+                bar();
+            }
+            "#,
+        );
+    }
+    #[test]
+    fn ignore_statements_inside_if() {
+        check_assist_not_applicable(
+            convert_to_guarded_return,
+            r#"
+            fn main() {
+                if false {
+                    if<|> true {
+                        foo();
+                    }
+                }
+            }
+            "#,
+        );
+    }
+}
diff --git a/crates/ra_assists/src/assists/fill_match_arms.rs b/crates/ra_assists/src/assists/fill_match_arms.rs
index 7335cce09..e3f30b5de 100644
--- a/crates/ra_assists/src/assists/fill_match_arms.rs
+++ b/crates/ra_assists/src/assists/fill_match_arms.rs
@@ -3,7 +3,7 @@
 use std::iter;
 use hir::{db::HirDatabase, Adt, HasSource};
-use ra_syntax::ast::{self, make, AstNode, NameOwner};
+use ra_syntax::ast::{self, edit::IndentLevel, make, AstNode, NameOwner};
 use crate::{Assist, AssistCtx, AssistId};
@@ -30,15 +30,19 @@ pub(crate) fn fill_match_arms(mut ctx: AssistCtx<impl HirDatabase>) -> Option<As
    let variant_list = enum_def.variant_list()?;
    ctx.add_action(AssistId("fill_match_arms"), "fill match arms", |edit| {
-        let variants = variant_list.variants();
+        let indent_level = IndentLevel::from_node(match_arm_list.syntax());
-        let arms = variants
-            .filter_map(build_pat)
+        let new_arm_list = {
-            .map(|pat| make::match_arm(iter::once(pat), make::expr_unit()));
+            let variants = variant_list.variants();
-        let new_arm_list = make::match_arm_list(arms);
+            let arms = variants
+                .filter_map(build_pat)
+                .map(|pat| make::match_arm(iter::once(pat), make::expr_unit()));
+            indent_level.increase_indent(make::match_arm_list(arms))
+        };
        edit.target(match_expr.syntax().text_range());
        edit.set_cursor(expr.syntax().text_range().start());
-        edit.replace_node_and_indent(match_arm_list.syntax(), new_arm_list.syntax().text());
+        edit.replace_ast(match_arm_list, new_arm_list);
    });
    ctx.build()
diff --git a/crates/ra_assists/src/assists/move_bounds.rs b/crates/ra_assists/src/assists/move_bounds.rs
index f791d22b0..d2444b6b9 100644
--- a/crates/ra_assists/src/assists/move_bounds.rs
+++ b/crates/ra_assists/src/assists/move_bounds.rs
@@ -18,7 +18,7 @@ pub(crate) fn move_bounds_to_where_clause(mut ctx: AssistCtx<impl HirDatabase>)
    }
    let parent = type_param_list.syntax().parent()?;
-    if parent.children_with_tokens().find(|it| it.kind() == WHERE_CLAUSE).is_some() {
+    if parent.children_with_tokens().any(|it| it.kind() == WHERE_CLAUSE) {
        return None;
    }
diff --git a/crates/ra_assists/src/assists/raw_string.rs b/crates/ra_assists/src/assists/raw_string.rs
index 388ee7e97..2d2e31e51 100644
--- a/crates/ra_assists/src/assists/raw_string.rs
+++ b/crates/ra_assists/src/assists/raw_string.rs
@@ -2,6 +2,7 @@
 use hir::db::HirDatabase;
 use ra_syntax::{ast::AstNode, ast::Literal, TextRange, TextUnit};
+use rustc_lexer;
 use crate::{Assist, AssistCtx, AssistId};
@@ -10,13 +11,51 @@ pub(crate) fn make_raw_string(mut ctx: AssistCtx<impl HirDatabase>) -> Option<As
    if literal.token().kind() != ra_syntax::SyntaxKind::STRING {
        return None;
    }
+    let token = literal.token();
+    let text = token.text().as_str();
+    let usual_string_range = find_usual_string_range(text)?;
+    let start_of_inside = usual_string_range.start().to_usize() + 1;
+    let end_of_inside = usual_string_range.end().to_usize();
+    let inside_str = &text[start_of_inside..end_of_inside];
+    let mut unescaped = String::with_capacity(inside_str.len());
+    let mut error = Ok(());
+    rustc_lexer::unescape::unescape_str(
+        inside_str,
+        &mut |_, unescaped_char| match unescaped_char {
+            Ok(c) => unescaped.push(c),
+            Err(_) => error = Err(()),
+        },
+    );
+    if error.is_err() {
+        return None;
+    }
    ctx.add_action(AssistId("make_raw_string"), "make raw string", |edit| {
        edit.target(literal.syntax().text_range());
-        edit.insert(literal.syntax().text_range().start(), "r");
+        let max_hash_streak = count_hashes(&unescaped);
+        let mut hashes = String::with_capacity(max_hash_streak + 1);
+        for _ in 0..hashes.capacity() {
+            hashes.push('#');
+        }
+        edit.replace(
+            literal.syntax().text_range(),
+            format!("r{}\"{}\"{}", hashes, unescaped, hashes),
+        );
    });
    ctx.build()
 }
+fn count_hashes(s: &str) -> usize {
+    let mut max_hash_streak = 0usize;
+    for idx in s.match_indices("\"#").map(|(i, _)| i) {
+        let (_, sub) = s.split_at(idx + 1);
+        let nb_hash = sub.chars().take_while(|c| *c == '#').count();
+        if nb_hash > max_hash_streak {
+            max_hash_streak = nb_hash;
+        }
+    }
+    max_hash_streak
+}
 fn find_usual_string_range(s: &str) -> Option<TextRange> {
    Some(TextRange::from_to(
        TextUnit::from(s.find('"')? as u32),
@@ -94,10 +133,10 @@ mod test {
            make_raw_string,
            r#"
            fn f() {
-                let s = <|>"random string";
+                let s = <|>"random\nstring";
            }
            "#,
-            r#""random string""#,
+            r#""random\nstring""#,
        );
    }
@@ -107,44 +146,69 @@ mod test {
            make_raw_string,
            r#"
            fn f() {
-                let s = <|>"random string";
+                let s = <|>"random\nstring";
            }
            "#,
-            r#"
+            r##"
            fn f() {
-                let s = <|>r"random string";
+                let s = <|>r#"random
+string"#;
            }
-            "#,
+            "##,
        )
    }
    #[test]
-    fn make_raw_string_with_escaped_works() {
+    fn make_raw_string_hashes_inside_works() {
        check_assist(
            make_raw_string,
-            r#"
+            r###"
            fn f() {
-                let s = <|>"random\nstring";
+                let s = <|>"#random##\nstring";
            }
-            "#,
+            "###,
-            r#"
+            r####"
            fn f() {
-                let s = <|>r"random\nstring";
+                let s = <|>r#"#random##
+string"#;
            }
-            "#,
+            "####,
        )
    }
    #[test]
-    fn make_raw_string_not_works() {
+    fn make_raw_string_closing_hashes_inside_works() {
-        check_assist_not_applicable(
+        check_assist(
+            make_raw_string,
+            r###"
+            fn f() {
+                let s = <|>"#random\"##\nstring";
+            }
+            "###,
+            r####"
+            fn f() {
+                let s = <|>r###"#random"##
+string"###;
+            }
+            "####,
+        )
+    }
+    #[test]
+    fn make_raw_string_nothing_to_unescape_works() {
+        check_assist(
            make_raw_string,
            r#"
            fn f() {
-                let s = <|>r"random string";
+                let s = <|>"random string";
            }
            "#,
-        );
+            r##"
+            fn f() {
+                let s = <|>r#"random string"#;
+            }
+            "##,
+        )
    }
    #[test]
@@ -369,4 +433,14 @@ mod test {
            "#,
        );
    }
+    #[test]
+    fn count_hashes_test() {
+        assert_eq!(0, count_hashes("abc"));
+        assert_eq!(0, count_hashes("###"));
+        assert_eq!(1, count_hashes("\"#abc"));
+        assert_eq!(0, count_hashes("#abc"));
+        assert_eq!(2, count_hashes("#ab\"##c"));
+        assert_eq!(4, count_hashes("#ab\"##\"####c"));
+    }
 }
diff --git a/crates/ra_assists/src/lib.rs b/crates/ra_assists/src/lib.rs
index d2376c475..ab77b46a9 100644
--- a/crates/ra_assists/src/lib.rs
+++ b/crates/ra_assists/src/lib.rs
@@ -108,6 +108,7 @@ mod assists {
    mod add_missing_impl_members;
    mod move_guard;
    mod move_bounds;
+    mod early_return;
    pub(crate) fn all<DB: HirDatabase>() -> &'static [fn(AssistCtx<DB>) -> Option<Assist>] {
        &[
@@ -135,6 +136,7 @@ mod assists {
            raw_string::make_raw_string,
            raw_string::make_usual_string,
            raw_string::remove_hash,
+            early_return::convert_to_guarded_return,
        ]
    }
 }
diff --git a/crates/ra_batch/Cargo.toml b/crates/ra_batch/Cargo.toml
index 62850746f..c85da7a2c 100644
--- a/crates/ra_batch/Cargo.toml
+++ b/crates/ra_batch/Cargo.toml
@@ -9,7 +9,7 @@ log = "0.4.5"
 rustc-hash = "1.0"
 crossbeam-channel = "0.3.5"
-ra_vfs = "0.4.0"
+ra_vfs = "0.5.0"
 ra_vfs_glob = { path = "../ra_vfs_glob" }
 ra_db = { path = "../ra_db" }
 ra_ide_api = { path = "../ra_ide_api" }
diff --git a/crates/ra_batch/src/lib.rs b/crates/ra_batch/src/lib.rs
index a5fc2a23e..df49eb13d 100644
--- a/crates/ra_batch/src/lib.rs
+++ b/crates/ra_batch/src/lib.rs
@@ -43,8 +43,12 @@ pub fn load_cargo(root: &Path) -> Result<(AnalysisHost, FxHashMap<SourceRootId,
    );
    // FIXME: cfg options?
-    let default_cfg_options =
+    let default_cfg_options = {
-        get_rustc_cfg_options().atom("test".into()).atom("debug_assertion".into());
+        let mut opts = get_rustc_cfg_options();
+        opts.insert_atom("test".into());
+        opts.insert_atom("debug_assertion".into());
+        opts
+    };
    let (crate_graph, _crate_names) =
        ws.to_crate_graph(&default_cfg_options, &mut |path: &Path| {
@@ -137,14 +141,8 @@ mod tests {
    #[test]
    fn test_loading_rust_analyzer() {
        let path = Path::new(env!("CARGO_MANIFEST_DIR")).parent().unwrap().parent().unwrap();
-        let (host, roots) = load_cargo(path).unwrap();
+        let (host, _roots) = load_cargo(path).unwrap();
-        let mut n_crates = 0;
+        let n_crates = Crate::all(host.raw_database()).len();
-        for (root, _) in roots {
-            for _krate in Crate::source_root_crates(host.raw_database(), root) {
-                n_crates += 1;
-            }
-        }
        // RA has quite a few crates, but the exact count doesn't matter
        assert!(n_crates > 20);
    }
diff --git a/crates/ra_cfg/src/lib.rs b/crates/ra_cfg/src/lib.rs
index e1c92fbba..1bee3eb99 100644
--- a/crates/ra_cfg/src/lib.rs
+++ b/crates/ra_cfg/src/lib.rs
@@ -36,26 +36,20 @@ impl CfgOptions {
        self.check(&parse_cfg(attr))
    }
-    pub fn atom(mut self, name: SmolStr) -> CfgOptions {
+    pub fn insert_atom(&mut self, key: SmolStr) {
-        self.atoms.insert(name);
+        self.atoms.insert(key);
-        self
    }
-    pub fn key_value(mut self, key: SmolStr, value: SmolStr) -> CfgOptions {
+    pub fn remove_atom(&mut self, name: &str) {
-        self.key_values.insert((key, value));
+        self.atoms.remove(name);
-        self
    }
-    /// Shortcut to set features
+    pub fn insert_key_value(&mut self, key: SmolStr, value: SmolStr) {
-    pub fn features(mut self, iter: impl IntoIterator<Item = SmolStr>) -> CfgOptions {
+        self.key_values.insert((key, value));
-        for feat in iter {
-            self = self.key_value("feature".into(), feat);
-        }
-        self
    }
-    pub fn remove_atom(mut self, name: &SmolStr) -> CfgOptions {
+    /// Shortcut to set features
-        self.atoms.remove(name);
+    pub fn insert_features(&mut self, iter: impl IntoIterator<Item = SmolStr>) {
-        self
+        iter.into_iter().for_each(|feat| self.insert_key_value("feature".into(), feat));
    }
 }
diff --git a/crates/ra_cli/Cargo.toml b/crates/ra_cli/Cargo.toml
index 67e727a88..fcd102e8b 100644
--- a/crates/ra_cli/Cargo.toml
+++ b/crates/ra_cli/Cargo.toml
@@ -8,7 +8,7 @@ publish = false
 [dependencies]
 pico-args = "0.3.0"
 flexi_logger = "0.14.0"
-indicatif = "0.11.0"
+indicatif = "0.12.0"
 ra_syntax = { path = "../ra_syntax" }
 ra_ide_api = { path = "../ra_ide_api" }
diff --git a/crates/ra_cli/src/analysis_bench.rs b/crates/ra_cli/src/analysis_bench.rs
index 727f1e62b..8bbe5d9e8 100644
--- a/crates/ra_cli/src/analysis_bench.rs
+++ b/crates/ra_cli/src/analysis_bench.rs
@@ -8,7 +8,7 @@ use std::{
 use ra_db::{
    salsa::{Database, Durability},
-    FileId, SourceDatabase,
+    FileId, SourceDatabaseExt,
 };
 use ra_ide_api::{Analysis, AnalysisChange, AnalysisHost, FilePosition, LineCol};
diff --git a/crates/ra_cli/src/analysis_stats.rs b/crates/ra_cli/src/analysis_stats.rs
index a8a110bd9..cda5cafb8 100644
--- a/crates/ra_cli/src/analysis_stats.rs
+++ b/crates/ra_cli/src/analysis_stats.rs
@@ -2,7 +2,7 @@
 use std::{collections::HashSet, fmt::Write, path::Path, time::Instant};
-use ra_db::SourceDatabase;
+use ra_db::SourceDatabaseExt;
 use ra_hir::{AssocItem, Crate, HasBodySource, HasSource, HirDisplay, ModuleDef, Ty, TypeWalk};
 use ra_syntax::AstNode;
@@ -22,16 +22,29 @@ pub fn run(
    let mut num_crates = 0;
    let mut visited_modules = HashSet::new();
    let mut visit_queue = Vec::new();
-    for (source_root_id, project_root) in roots {
-        if project_root.is_member() {
+    let members = roots
-            for krate in Crate::source_root_crates(db, source_root_id) {
+        .into_iter()
-                num_crates += 1;
+        .filter_map(
-                let module =
+            |(source_root_id, project_root)| {
-                    krate.root_module(db).expect("crate in source root without root module");
+                if project_root.is_member() {
-                visit_queue.push(module);
+                    Some(source_root_id)
-            }
+                } else {
+                    None
+                }
+            },
+        )
+        .collect::<HashSet<_>>();
+    for krate in Crate::all(db) {
+        let module = krate.root_module(db).expect("crate without root module");
+        let file_id = module.definition_source(db).file_id;
+        if members.contains(&db.file_source_root(file_id.original_file(db))) {
+            num_crates += 1;
+            visit_queue.push(module);
        }
    }
    println!("Crates in this dir: {}", num_crates);
    let mut num_decls = 0;
    let mut funcs = Vec::new();
@@ -130,7 +143,7 @@ pub fn run(
                        );
                        bar.println(format!(
                            "{} {}:{}-{}:{}: Expected {}, got {}",
-                            path.display(),
+                            path,
                            start.line + 1,
                            start.col_utf16,
                            end.line + 1,
diff --git a/crates/ra_db/Cargo.toml b/crates/ra_db/Cargo.toml
index c141f1a88..3394ae8ce 100644
--- a/crates/ra_db/Cargo.toml
+++ b/crates/ra_db/Cargo.toml
@@ -6,7 +6,7 @@ authors = ["rust-analyzer developers"]
 [dependencies]
 salsa = "0.13.0"
-relative-path = "0.4.0"
+relative-path = "1.0.0"
 rustc-hash = "1.0"
 ra_syntax = { path = "../ra_syntax" }
diff --git a/crates/ra_db/src/input.rs b/crates/ra_db/src/input.rs
index 23148096c..eafa95921 100644
--- a/crates/ra_db/src/input.rs
+++ b/crates/ra_db/src/input.rs
@@ -48,9 +48,6 @@ impl SourceRoot {
    pub fn new_library() -> SourceRoot {
        SourceRoot { is_library: true, ..SourceRoot::new() }
    }
-    pub fn file_by_relative_path(&self, path: &RelativePath) -> Option<FileId> {
-        self.files.get(path).copied()
-    }
    pub fn insert_file(&mut self, path: RelativePathBuf, file_id: FileId) {
        self.files.insert(path, file_id);
    }
@@ -60,6 +57,9 @@ impl SourceRoot {
    pub fn walk(&self) -> impl Iterator<Item = FileId> + '_ {
        self.files.values().copied()
    }
+    pub fn file_by_relative_path(&self, path: &RelativePath) -> Option<FileId> {
+        self.files.get(path).copied()
+    }
 }
 /// `CrateGraph` is a bit of information which turns a set of text files into a
diff --git a/crates/ra_db/src/lib.rs b/crates/ra_db/src/lib.rs
index 603daed37..fc5d6d396 100644
--- a/crates/ra_db/src/lib.rs
+++ b/crates/ra_db/src/lib.rs
@@ -6,7 +6,7 @@ use std::{panic, sync::Arc};
 use ra_prof::profile;
 use ra_syntax::{ast, Parse, SourceFile, TextRange, TextUnit};
-use relative_path::RelativePathBuf;
+use relative_path::{RelativePath, RelativePathBuf};
 pub use crate::{
    cancellation::Canceled,
@@ -64,16 +64,39 @@ pub struct FileRange {
 pub const DEFAULT_LRU_CAP: usize = 128;
+pub trait FileLoader {
+    /// Text of the file.
+    fn file_text(&self, file_id: FileId) -> Arc<String>;
+    fn resolve_relative_path(&self, anchor: FileId, relative_path: &RelativePath)
+        -> Option<FileId>;
+    fn relevant_crates(&self, file_id: FileId) -> Arc<Vec<CrateId>>;
+}
 /// Database which stores all significant input facts: source code and project
 /// model. Everything else in rust-analyzer is derived from these queries.
 #[salsa::query_group(SourceDatabaseStorage)]
-pub trait SourceDatabase: CheckCanceled + std::fmt::Debug {
+pub trait SourceDatabase: CheckCanceled + FileLoader + std::fmt::Debug {
-    /// Text of the file.
-    #[salsa::input]
-    fn file_text(&self, file_id: FileId) -> Arc<String>;
    // Parses the file into the syntax tree.
    #[salsa::invoke(parse_query)]
    fn parse(&self, file_id: FileId) -> Parse<ast::SourceFile>;
+    /// The crate graph.
+    #[salsa::input]
+    fn crate_graph(&self) -> Arc<CrateGraph>;
+}
+fn parse_query(db: &impl SourceDatabase, file_id: FileId) -> Parse<ast::SourceFile> {
+    let _p = profile("parse_query");
+    let text = db.file_text(file_id);
+    SourceFile::parse(&*text)
+}
+/// We don't want to give HIR knowledge of source roots, hence we extract these
+/// methods into a separate DB.
+#[salsa::query_group(SourceDatabaseExtStorage)]
+pub trait SourceDatabaseExt: SourceDatabase {
+    #[salsa::input]
+    fn file_text(&self, file_id: FileId) -> Arc<String>;
    /// Path to a file, relative to the root of its source root.
    #[salsa::input]
    fn file_relative_path(&self, file_id: FileId) -> RelativePathBuf;
@@ -83,21 +106,48 @@ pub trait SourceDatabase: CheckCanceled + std::fmt::Debug {
    /// Contents of the source root.
    #[salsa::input]
    fn source_root(&self, id: SourceRootId) -> Arc<SourceRoot>;
    fn source_root_crates(&self, id: SourceRootId) -> Arc<Vec<CrateId>>;
-    /// The crate graph.
-    #[salsa::input]
-    fn crate_graph(&self) -> Arc<CrateGraph>;
 }
-fn source_root_crates(db: &impl SourceDatabase, id: SourceRootId) -> Arc<Vec<CrateId>> {
+fn source_root_crates(
+    db: &(impl SourceDatabaseExt + SourceDatabase),
+    id: SourceRootId,
+) -> Arc<Vec<CrateId>> {
    let root = db.source_root(id);
    let graph = db.crate_graph();
    let res = root.walk().filter_map(|it| graph.crate_id_for_crate_root(it)).collect::<Vec<_>>();
    Arc::new(res)
 }
-fn parse_query(db: &impl SourceDatabase, file_id: FileId) -> Parse<ast::SourceFile> {
+/// Silly workaround for cyclic deps between the traits
-    let _p = profile("parse_query");
+pub struct FileLoaderDelegate<T>(pub T);
-    let text = db.file_text(file_id);
-    SourceFile::parse(&*text)
+impl<T: SourceDatabaseExt> FileLoader for FileLoaderDelegate<&'_ T> {
+    fn file_text(&self, file_id: FileId) -> Arc<String> {
+        SourceDatabaseExt::file_text(self.0, file_id)
+    }
+    fn resolve_relative_path(
+        &self,
+        anchor: FileId,
+        relative_path: &RelativePath,
+    ) -> Option<FileId> {
+        let path = {
+            let mut path = self.0.file_relative_path(anchor);
+            // Workaround for relative path API: turn `lib.rs` into ``.
+            if !path.pop() {
+                path = RelativePathBuf::default();
+            }
+            path.push(relative_path);
+            path.normalize()
+        };
+        let source_root = self.0.file_source_root(anchor);
+        let source_root = self.0.source_root(source_root);
+        source_root.file_by_relative_path(&path)
+    }
+    fn relevant_crates(&self, file_id: FileId) -> Arc<Vec<CrateId>> {
+        let source_root = self.0.file_source_root(file_id);
+        self.0.source_root_crates(source_root)
+    }
 }
diff --git a/crates/ra_hir/Cargo.toml b/crates/ra_hir/Cargo.toml
index cc117f84d..edf1fa49b 100644
--- a/crates/ra_hir/Cargo.toml
+++ b/crates/ra_hir/Cargo.toml
@@ -5,9 +5,9 @@ version = "0.1.0"
 authors = ["rust-analyzer developers"]
 [dependencies]
-arrayvec = "0.4.10"
+arrayvec = "0.5.1"
 log = "0.4.5"
-relative-path = "0.4.0"
+relative-path = "1.0.0"
 rustc-hash = "1.0"
 parking_lot = "0.9.0"
 ena = "0.13"
diff --git a/crates/ra_hir/src/adt.rs b/crates/ra_hir/src/adt.rs
index 99d286215..3e9cd3c63 100644
--- a/crates/ra_hir/src/adt.rs
+++ b/crates/ra_hir/src/adt.rs
@@ -9,7 +9,7 @@ use ra_syntax::ast::{self, NameOwner, StructKind, TypeAscriptionOwner};
 use crate::{
    db::{AstDatabase, DefDatabase, HirDatabase},
    type_ref::TypeRef,
-    AsName, Enum, EnumVariant, FieldSource, HasSource, Name, Source, Struct, StructField,
+    AsName, Enum, EnumVariant, FieldSource, HasSource, Module, Name, Source, Struct, StructField,
 };
 impl Struct {
@@ -170,12 +170,20 @@ impl VariantDef {
        }
    }
-    pub(crate) fn field(self, db: &impl HirDatabase, name: &Name) -> Option<StructField> {
+    pub fn field(self, db: &impl HirDatabase, name: &Name) -> Option<StructField> {
        match self {
            VariantDef::Struct(it) => it.field(db, name),
            VariantDef::EnumVariant(it) => it.field(db, name),
        }
    }
+    pub fn module(self, db: &impl HirDatabase) -> Module {
+        match self {
+            VariantDef::Struct(it) => it.module(db),
+            VariantDef::EnumVariant(it) => it.module(db),
+        }
+    }
    pub(crate) fn variant_data(self, db: &impl DefDatabase) -> Arc<VariantData> {
        match self {
            VariantDef::Struct(it) => it.variant_data(db),
diff --git a/crates/ra_hir/src/attr.rs b/crates/ra_hir/src/attr.rs
index f67e80bfd..bd159a566 100644
--- a/crates/ra_hir/src/attr.rs
+++ b/crates/ra_hir/src/attr.rs
@@ -63,14 +63,24 @@ impl Attr {
        self.path.as_ident().map_or(false, |s| s.to_string() == name)
    }
+    // FIXME: handle cfg_attr :-)
    pub(crate) fn as_cfg(&self) -> Option<&Subtree> {
-        if self.is_simple_atom("cfg") {
+        if !self.is_simple_atom("cfg") {
-            match &self.input {
+            return None;
-                Some(AttrInput::TokenTree(subtree)) => Some(subtree),
+        }
-                _ => None,
+        match &self.input {
-            }
+            Some(AttrInput::TokenTree(subtree)) => Some(subtree),
-        } else {
+            _ => None,
-            None
+        }
+    }
+    pub(crate) fn as_path(&self) -> Option<&SmolStr> {
+        if !self.is_simple_atom("path") {
+            return None;
+        }
+        match &self.input {
+            Some(AttrInput::Literal(it)) => Some(it),
+            _ => None,
        }
    }
diff --git a/crates/ra_hir/src/code_model.rs b/crates/ra_hir/src/code_model.rs
index e3a7e8e3c..8eb3c577d 100644
--- a/crates/ra_hir/src/code_model.rs
+++ b/crates/ra_hir/src/code_model.rs
@@ -5,7 +5,7 @@ pub(crate) mod docs;
 use std::sync::Arc;
-use ra_db::{CrateId, Edition, FileId, SourceRootId};
+use ra_db::{CrateId, Edition, FileId};
 use ra_syntax::ast::{self, NameOwner, TypeAscriptionOwner};
 use crate::{
@@ -24,7 +24,7 @@ use crate::{
        U8, USIZE,
    },
    nameres::{CrateModuleId, ImportId, ModuleScope, Namespace},
-    resolve::{Resolver, TypeNs},
+    resolve::{Resolver, Scope, TypeNs},
    traits::TraitData,
    ty::{
        primitive::{FloatBitness, FloatTy, IntBitness, IntTy, Signedness},
@@ -76,10 +76,8 @@ impl Crate {
        crate_graph.edition(self.crate_id)
    }
-    // FIXME: should this be in source_binder?
+    pub fn all(db: &impl DefDatabase) -> Vec<Crate> {
-    pub fn source_root_crates(db: &impl DefDatabase, source_root: SourceRootId) -> Vec<Crate> {
+        db.crate_graph().iter().map(|crate_id| Crate { crate_id }).collect()
-        let crate_ids = db.source_root_crates(source_root);
-        crate_ids.iter().map(|&crate_id| Crate { crate_id }).collect()
    }
 }
@@ -465,7 +463,7 @@ impl Enum {
        // ...and add generic params, if present
        let p = self.generic_params(db);
        let r = if !p.params.is_empty() { r.push_generic_params_scope(p) } else { r };
-        r
+        r.push_scope(Scope::AdtScope(self.into()))
    }
 }
@@ -569,6 +567,14 @@ impl DefWithBody {
            DefWithBody::Static(s) => s.krate(db),
        }
    }
+    pub fn module(self, db: &impl HirDatabase) -> Module {
+        match self {
+            DefWithBody::Const(c) => c.module(db),
+            DefWithBody::Function(f) => f.module(db),
+            DefWithBody::Static(s) => s.module(db),
+        }
+    }
 }
 pub trait HasBody: Copy {
@@ -789,6 +795,20 @@ impl Const {
        ImplBlock::containing(module_impls, self.into())
    }
+    pub fn parent_trait(self, db: &impl DefDatabase) -> Option<Trait> {
+        db.trait_items_index(self.module(db)).get_parent_trait(self.into())
+    }
+    pub fn container(self, db: &impl DefDatabase) -> Option<Container> {
+        if let Some(impl_block) = self.impl_block(db) {
+            Some(impl_block.into())
+        } else if let Some(trait_) = self.parent_trait(db) {
+            Some(trait_.into())
+        } else {
+            None
+        }
+    }
    // FIXME: move to a more general type for 'body-having' items
    /// Builds a resolver for code inside this item.
    pub(crate) fn resolver(self, db: &impl HirDatabase) -> Resolver {
@@ -1075,3 +1095,13 @@ impl From<AssocItem> for crate::generics::GenericDef {
        }
    }
 }
+impl AssocItem {
+    pub fn module(self, db: &impl DefDatabase) -> Module {
+        match self {
+            AssocItem::Function(f) => f.module(db),
+            AssocItem::Const(c) => c.module(db),
+            AssocItem::TypeAlias(t) => t.module(db),
+        }
+    }
+}
diff --git a/crates/ra_hir/src/code_model/docs.rs b/crates/ra_hir/src/code_model/docs.rs
index 9675e397f..8533b4f5e 100644
--- a/crates/ra_hir/src/code_model/docs.rs
+++ b/crates/ra_hir/src/code_model/docs.rs
@@ -6,21 +6,19 @@ use ra_syntax::ast;
 use crate::{
    db::{AstDatabase, DefDatabase, HirDatabase},
-    Const, Enum, EnumVariant, FieldSource, Function, HasSource, MacroDef, Module, Static, Struct,
+    Adt, Const, Enum, EnumVariant, FieldSource, Function, HasSource, MacroDef, Module, Static,
-    StructField, Trait, TypeAlias, Union,
+    Struct, StructField, Trait, TypeAlias, Union,
 };
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
 pub enum DocDef {
    Module(Module),
    StructField(StructField),
-    Struct(Struct),
+    Adt(Adt),
-    Enum(Enum),
    EnumVariant(EnumVariant),
    Static(Static),
    Const(Const),
    Function(Function),
-    Union(Union),
    Trait(Trait),
    TypeAlias(TypeAlias),
    MacroDef(MacroDef),
@@ -29,13 +27,11 @@ pub enum DocDef {
 impl_froms!(
    DocDef: Module,
    StructField,
-    Struct,
+    Adt(Struct, Enum, Union),
-    Enum,
    EnumVariant,
    Static,
    Const,
    Function,
-    Union,
    Trait,
    TypeAlias,
    MacroDef
@@ -79,13 +75,15 @@ pub(crate) fn documentation_query(
            FieldSource::Named(named) => docs_from_ast(&named),
            FieldSource::Pos(..) => None,
        },
-        DocDef::Struct(it) => docs_from_ast(&it.source(db).ast),
+        DocDef::Adt(it) => match it {
-        DocDef::Enum(it) => docs_from_ast(&it.source(db).ast),
+            Adt::Struct(it) => docs_from_ast(&it.source(db).ast),
+            Adt::Enum(it) => docs_from_ast(&it.source(db).ast),
+            Adt::Union(it) => docs_from_ast(&it.source(db).ast),
+        },
        DocDef::EnumVariant(it) => docs_from_ast(&it.source(db).ast),
        DocDef::Static(it) => docs_from_ast(&it.source(db).ast),
        DocDef::Const(it) => docs_from_ast(&it.source(db).ast),
        DocDef::Function(it) => docs_from_ast(&it.source(db).ast),
-        DocDef::Union(it) => docs_from_ast(&it.source(db).ast),
        DocDef::Trait(it) => docs_from_ast(&it.source(db).ast),
        DocDef::TypeAlias(it) => docs_from_ast(&it.source(db).ast),
        DocDef::MacroDef(it) => docs_from_ast(&it.source(db).ast),
diff --git a/crates/ra_hir/src/db.rs b/crates/ra_hir/src/db.rs
index 73d7d6fb6..489a3b19c 100644
--- a/crates/ra_hir/src/db.rs
+++ b/crates/ra_hir/src/db.rs
@@ -111,37 +111,37 @@ pub trait DefDatabase: InternDatabase + HirDebugDatabase {
    #[salsa::invoke(CrateDefMap::crate_def_map_query)]
    fn crate_def_map(&self, krate: Crate) -> Arc<CrateDefMap>;
-    #[salsa::invoke(crate::impl_block::impls_in_module_with_source_map_query)]
+    #[salsa::invoke(ModuleImplBlocks::impls_in_module_with_source_map_query)]
    fn impls_in_module_with_source_map(
        &self,
        module: Module,
    ) -> (Arc<ModuleImplBlocks>, Arc<ImplSourceMap>);
-    #[salsa::invoke(crate::impl_block::impls_in_module)]
+    #[salsa::invoke(ModuleImplBlocks::impls_in_module_query)]
    fn impls_in_module(&self, module: Module) -> Arc<ModuleImplBlocks>;
    #[salsa::invoke(crate::generics::GenericParams::generic_params_query)]
    fn generic_params(&self, def: GenericDef) -> Arc<GenericParams>;
-    #[salsa::invoke(crate::FnData::fn_data_query)]
+    #[salsa::invoke(FnData::fn_data_query)]
    fn fn_data(&self, func: Function) -> Arc<FnData>;
-    #[salsa::invoke(crate::type_alias::type_alias_data_query)]
+    #[salsa::invoke(TypeAliasData::type_alias_data_query)]
    fn type_alias_data(&self, typ: TypeAlias) -> Arc<TypeAliasData>;
-    #[salsa::invoke(crate::ConstData::const_data_query)]
+    #[salsa::invoke(ConstData::const_data_query)]
    fn const_data(&self, konst: Const) -> Arc<ConstData>;
-    #[salsa::invoke(crate::ConstData::static_data_query)]
+    #[salsa::invoke(ConstData::static_data_query)]
    fn static_data(&self, konst: Static) -> Arc<ConstData>;
-    #[salsa::invoke(crate::lang_item::LangItems::module_lang_items_query)]
+    #[salsa::invoke(LangItems::module_lang_items_query)]
    fn module_lang_items(&self, module: Module) -> Option<Arc<LangItems>>;
-    #[salsa::invoke(crate::lang_item::LangItems::crate_lang_items_query)]
+    #[salsa::invoke(LangItems::crate_lang_items_query)]
    fn crate_lang_items(&self, krate: Crate) -> Arc<LangItems>;
-    #[salsa::invoke(crate::lang_item::LangItems::lang_item_query)]
+    #[salsa::invoke(LangItems::lang_item_query)]
    fn lang_item(&self, start_crate: Crate, item: SmolStr) -> Option<LangItemTarget>;
    #[salsa::invoke(crate::code_model::docs::documentation_query)]
diff --git a/crates/ra_hir/src/debug.rs b/crates/ra_hir/src/debug.rs
index 87f3180c3..48b69000b 100644
--- a/crates/ra_hir/src/debug.rs
+++ b/crates/ra_hir/src/debug.rs
@@ -22,7 +22,7 @@ use std::fmt;
 use ra_db::{CrateId, FileId};
-use crate::{db::HirDatabase, Crate, Module, Name};
+use crate::{db::HirDatabase, Crate, HirFileId, Module, Name};
 impl Crate {
    pub fn debug(self, db: &impl HirDebugDatabase) -> impl fmt::Debug + '_ {
@@ -36,6 +36,12 @@ impl Module {
    }
 }
+impl HirFileId {
+    pub fn debug(self, db: &impl HirDebugDatabase) -> impl fmt::Debug + '_ {
+        debug_fn(move |fmt| db.debug_hir_file_id(self, fmt))
+    }
+}
 pub trait HirDebugHelper: HirDatabase {
    fn crate_name(&self, _krate: CrateId) -> Option<String> {
        None
@@ -48,6 +54,7 @@ pub trait HirDebugHelper: HirDatabase {
 pub trait HirDebugDatabase {
    fn debug_crate(&self, krate: Crate, fmt: &mut fmt::Formatter<'_>) -> fmt::Result;
    fn debug_module(&self, module: Module, fmt: &mut fmt::Formatter<'_>) -> fmt::Result;
+    fn debug_hir_file_id(&self, file_id: HirFileId, fmt: &mut fmt::Formatter<'_>) -> fmt::Result;
 }
 impl<DB: HirDebugHelper> HirDebugDatabase for DB {
@@ -62,12 +69,19 @@ impl<DB: HirDebugHelper> HirDebugDatabase for DB {
    fn debug_module(&self, module: Module, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
        let file_id = module.definition_source(self).file_id.original_file(self);
-        let path = self.file_path(file_id);
+        let path = self.file_path(file_id).unwrap_or_else(|| "N/A".to_string());
        fmt.debug_struct("Module")
            .field("name", &module.name(self).unwrap_or_else(Name::missing))
-            .field("path", &path.unwrap_or_else(|| "N/A".to_string()))
+            .field("path", &path)
            .finish()
    }
+    fn debug_hir_file_id(&self, file_id: HirFileId, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let original = file_id.original_file(self);
+        let path = self.file_path(original).unwrap_or_else(|| "N/A".to_string());
+        let is_macro = file_id != original.into();
+        fmt.debug_struct("HirFileId").field("path", &path).field("macro", &is_macro).finish()
+    }
 }
 fn debug_fn(f: impl Fn(&mut fmt::Formatter<'_>) -> fmt::Result) -> impl fmt::Debug {
diff --git a/crates/ra_hir/src/from_source.rs b/crates/ra_hir/src/from_source.rs
index a012f33f7..f80d8eb5f 100644
--- a/crates/ra_hir/src/from_source.rs
+++ b/crates/ra_hir/src/from_source.rs
@@ -189,14 +189,14 @@ impl Module {
            ModuleSource::SourceFile(_) => None,
        };
-        let source_root_id = db.file_source_root(src.file_id.original_file(db));
+        db.relevant_crates(src.file_id.original_file(db))
-        db.source_root_crates(source_root_id).iter().map(|&crate_id| Crate { crate_id }).find_map(
+            .iter()
-            |krate| {
+            .map(|&crate_id| Crate { crate_id })
+            .find_map(|krate| {
                let def_map = db.crate_def_map(krate);
                let module_id = def_map.find_module_by_source(src.file_id, decl_id)?;
                Some(Module { krate, module_id })
-            },
+            })
-        )
    }
 }
diff --git a/crates/ra_hir/src/ids.rs b/crates/ra_hir/src/ids.rs
index a3b65cc79..499dcafea 100644
--- a/crates/ra_hir/src/ids.rs
+++ b/crates/ra_hir/src/ids.rs
@@ -50,16 +50,6 @@ impl HirFileId {
        }
    }
-    /// XXX: this is a temporary function, which should go away when we implement the
-    /// nameresolution+macro expansion combo. Prefer using `original_file` if
-    /// possible.
-    pub fn as_original_file(self) -> FileId {
-        match self.0 {
-            HirFileIdRepr::File(file_id) => file_id,
-            HirFileIdRepr::Macro(_r) => panic!("macro generated file: {:?}", self),
-        }
-    }
    /// Get the crate which the macro lives in, if it is a macro file.
    pub(crate) fn macro_crate(self, db: &impl AstDatabase) -> Option<Crate> {
        match self.0 {
@@ -95,11 +85,7 @@ impl HirFileId {
                // Note:
                // The final goal we would like to make all parse_macro success,
                // such that the following log will not call anyway.
-                log::warn!(
+                log::warn!("fail on macro_parse: (reason: {})", err,);
-                    "fail on macro_parse: (reason: {}) {}",
-                    err,
-                    macro_call_id.debug_dump(db)
-                );
            })
            .ok()?;
        match macro_file.macro_file_kind {
@@ -377,35 +363,6 @@ impl AstItemDef<ast::TypeAliasDef> for TypeAliasId {
    }
 }
-impl MacroCallId {
-    pub fn debug_dump(self, db: &impl AstDatabase) -> String {
-        let loc = self.loc(db);
-        let node = loc.ast_id.to_node(db);
-        let syntax_str = {
-            let mut res = String::new();
-            node.syntax().text().for_each_chunk(|chunk| {
-                if !res.is_empty() {
-                    res.push(' ')
-                }
-                res.push_str(chunk)
-            });
-            res
-        };
-        // dump the file name
-        let file_id: HirFileId = self.loc(db).ast_id.file_id();
-        let original = file_id.original_file(db);
-        let macro_rules = db.macro_def(loc.def);
-        format!(
-            "macro call [file: {:?}] : {}\nhas rules: {}",
-            db.file_relative_path(original),
-            syntax_str,
-            macro_rules.is_some()
-        )
-    }
-}
 /// This exists just for Chalk, because Chalk just has a single `StructId` where
 /// we have different kinds of ADTs, primitive types and special type
 /// constructors like tuples and function pointers.
diff --git a/crates/ra_hir/src/impl_block.rs b/crates/ra_hir/src/impl_block.rs
index 55dfc393b..33ef87563 100644
--- a/crates/ra_hir/src/impl_block.rs
+++ b/crates/ra_hir/src/impl_block.rs
@@ -176,6 +176,25 @@ pub struct ModuleImplBlocks {
 }
 impl ModuleImplBlocks {
+    pub(crate) fn impls_in_module_with_source_map_query(
+        db: &(impl DefDatabase + AstDatabase),
+        module: Module,
+    ) -> (Arc<ModuleImplBlocks>, Arc<ImplSourceMap>) {
+        let mut source_map = ImplSourceMap::default();
+        let crate_graph = db.crate_graph();
+        let cfg_options = crate_graph.cfg_options(module.krate.crate_id());
+        let result = ModuleImplBlocks::collect(db, cfg_options, module, &mut source_map);
+        (Arc::new(result), Arc::new(source_map))
+    }
+    pub(crate) fn impls_in_module_query(
+        db: &impl DefDatabase,
+        module: Module,
+    ) -> Arc<ModuleImplBlocks> {
+        db.impls_in_module_with_source_map(module).0
+    }
    fn collect(
        db: &(impl DefDatabase + AstDatabase),
        cfg_options: &CfgOptions,
@@ -264,19 +283,3 @@ impl ModuleImplBlocks {
        }
    }
 }
-pub(crate) fn impls_in_module_with_source_map_query(
-    db: &(impl DefDatabase + AstDatabase),
-    module: Module,
-) -> (Arc<ModuleImplBlocks>, Arc<ImplSourceMap>) {
-    let mut source_map = ImplSourceMap::default();
-    let crate_graph = db.crate_graph();
-    let cfg_options = crate_graph.cfg_options(module.krate.crate_id());
-    let result = ModuleImplBlocks::collect(db, cfg_options, module, &mut source_map);
-    (Arc::new(result), Arc::new(source_map))
-}
-pub(crate) fn impls_in_module(db: &impl DefDatabase, module: Module) -> Arc<ModuleImplBlocks> {
-    db.impls_in_module_with_source_map(module).0
-}
diff --git a/crates/ra_hir/src/lib.rs b/crates/ra_hir/src/lib.rs
index 4340e9d34..ca261e8f5 100644
--- a/crates/ra_hir/src/lib.rs
+++ b/crates/ra_hir/src/lib.rs
@@ -51,6 +51,7 @@ mod lang_item;
 mod generics;
 mod resolve;
 pub mod diagnostics;
+mod util;
 mod code_model;
@@ -71,7 +72,7 @@ pub use self::{
    either::Either,
    expr::ExprScopes,
    from_source::FromSource,
-    generics::{GenericParam, GenericParams, HasGenericParams},
+    generics::{GenericDef, GenericParam, GenericParams, HasGenericParams},
    ids::{HirFileId, MacroCallId, MacroCallLoc, MacroDefId, MacroFile},
    impl_block::ImplBlock,
    name::Name,
diff --git a/crates/ra_hir/src/mock.rs b/crates/ra_hir/src/mock.rs
index f750986b8..0b278deb3 100644
--- a/crates/ra_hir/src/mock.rs
+++ b/crates/ra_hir/src/mock.rs
@@ -5,10 +5,10 @@ use std::{panic, sync::Arc};
 use parking_lot::Mutex;
 use ra_cfg::CfgOptions;
 use ra_db::{
-    salsa, CrateGraph, CrateId, Edition, FileId, FilePosition, SourceDatabase, SourceRoot,
+    salsa, CrateGraph, CrateId, Edition, FileId, FileLoader, FileLoaderDelegate, FilePosition,
-    SourceRootId,
+    SourceDatabase, SourceDatabaseExt, SourceRoot, SourceRootId,
 };
-use relative_path::RelativePathBuf;
+use relative_path::{RelativePath, RelativePathBuf};
 use rustc_hash::FxHashMap;
 use test_utils::{extract_offset, parse_fixture, CURSOR_MARKER};
@@ -17,6 +17,7 @@ use crate::{db, debug::HirDebugHelper, diagnostics::DiagnosticSink};
 pub const WORKSPACE: SourceRootId = SourceRootId(0);
 #[salsa::database(
+    ra_db::SourceDatabaseExtStorage,
    ra_db::SourceDatabaseStorage,
    db::InternDatabaseStorage,
    db::AstDatabaseStorage,
@@ -34,6 +35,22 @@ pub struct MockDatabase {
 impl panic::RefUnwindSafe for MockDatabase {}
+impl FileLoader for MockDatabase {
+    fn file_text(&self, file_id: FileId) -> Arc<String> {
+        FileLoaderDelegate(self).file_text(file_id)
+    }
+    fn resolve_relative_path(
+        &self,
+        anchor: FileId,
+        relative_path: &RelativePath,
+    ) -> Option<FileId> {
+        FileLoaderDelegate(self).resolve_relative_path(anchor, relative_path)
+    }
+    fn relevant_crates(&self, file_id: FileId) -> Arc<Vec<CrateId>> {
+        FileLoaderDelegate(self).relevant_crates(file_id)
+    }
+}
 impl HirDebugHelper for MockDatabase {
    fn crate_name(&self, krate: CrateId) -> Option<String> {
        self.crate_names.get(&krate).cloned()
@@ -278,7 +295,10 @@ macro_rules! crate_graph {