14 files changed, 190 insertions, 234 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 56fb4aad3..e0a41e258 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -39,7 +39,7 @@ dependencies = [
 
 [[package]]
 name = "autocfg"
-version = "0.1.1"
+version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -47,7 +47,7 @@ name = "backtrace"
 version = "0.3.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "backtrace-sys 0.1.28 (registry+https://github.com/rust-lang/crates.io-index)",
  "cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.47 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -118,7 +118,7 @@ dependencies = [
  "semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.84 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.84 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.36 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -246,9 +246,9 @@ name = "derive-new"
 version = "0.5.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 0.4.24 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 0.4.25 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.15.25 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.15.26 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -314,9 +314,9 @@ name = "failure_derive"
 version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 0.4.24 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 0.4.25 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.15.25 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.15.26 (registry+https://github.com/rust-lang/crates.io-index)",
  "synstructure 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -327,7 +327,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "flexi_logger"
-version = "0.10.4"
+version = "0.10.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "chrono 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -373,7 +373,7 @@ dependencies = [
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "lsp-types 0.54.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.84 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.36 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -414,7 +414,7 @@ dependencies = [
 
 [[package]]
 name = "im"
-version = "12.2.0"
+version = "12.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -437,7 +437,7 @@ dependencies = [
  "failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.84 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.36 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -495,7 +495,7 @@ dependencies = [
  "num-traits 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.84 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.84 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.36 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 1.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "url_serde 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -545,9 +545,9 @@ version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "num-traits 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "proc-macro2 0.4.24 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 0.4.25 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.15.25 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.15.26 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -629,9 +629,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "pest 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "pest_meta 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "proc-macro2 0.4.24 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 0.4.25 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.15.25 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.15.26 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -646,7 +646,7 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "0.4.24"
+version = "0.4.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -679,7 +679,7 @@ name = "quote"
 version = "0.6.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 0.4.24 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 0.4.25 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -707,7 +707,7 @@ dependencies = [
  "ra_syntax 0.1.0",
  "relative-path 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-hash 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "salsa 0.9.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "salsa 0.10.0-alpha1 (registry+https://github.com/rust-lang/crates.io-index)",
  "test_utils 0.1.0",
 ]
 
@@ -717,7 +717,7 @@ version = "0.1.0"
 dependencies = [
  "arrayvec 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "ena 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "flexi_logger 0.10.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "flexi_logger 0.10.5 (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 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "parking_lot 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -726,7 +726,6 @@ dependencies = [
  "ra_syntax 0.1.0",
  "relative-path 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-hash 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "salsa 0.9.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "test_utils 0.1.0",
 ]
 
@@ -747,7 +746,6 @@ dependencies = [
  "rayon 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "relative-path 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-hash 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "salsa 0.9.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "test_utils 0.1.0",
  "unicase 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -776,9 +774,9 @@ dependencies = [
  "drop_bomb 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "failure_derive 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "flexi_logger 0.10.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "flexi_logger 0.10.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "gen_lsp_server 0.1.0",
- "im 12.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "im 12.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "lsp-types 0.54.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "parking_lot 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -791,7 +789,7 @@ dependencies = [
  "relative-path 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-hash 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.84 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.36 (registry+https://github.com/rust-lang/crates.io-index)",
  "tempfile 3.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "test_utils 0.1.0",
  "thread_worker 0.1.0",
@@ -857,7 +855,7 @@ name = "rand"
 version = "0.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.47 (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 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -874,7 +872,7 @@ name = "rand_chacha"
 version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "autocfg 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1071,7 +1069,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "salsa"
-version = "0.9.2"
+version = "0.10.0-alpha1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "derive-new 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1080,10 +1078,22 @@ dependencies = [
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "parking_lot 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-hash 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "salsa-macros 0.10.0-alpha1 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
+name = "salsa-macros"
+version = "0.10.0-alpha1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "heck 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 0.4.25 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.15.26 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "same-file"
 version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1123,14 +1133,14 @@ name = "serde_derive"
 version = "1.0.84"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 0.4.24 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 0.4.25 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.15.25 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.15.26 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "serde_json"
-version = "1.0.35"
+version = "1.0.36"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "itoa 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1190,10 +1200,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "syn"
-version = "0.15.25"
+version = "0.15.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 0.4.24 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 0.4.25 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -1203,9 +1213,9 @@ name = "synstructure"
 version = "0.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 0.4.24 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 0.4.25 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.15.25 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.15.26 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1236,7 +1246,7 @@ dependencies = [
  "pest_derive 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.84 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.36 (registry+https://github.com/rust-lang/crates.io-index)",
  "slug 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "unic-segment 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 1.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1277,7 +1287,7 @@ version = "0.1.0"
 dependencies = [
  "difference 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "itertools 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.36 (registry+https://github.com/rust-lang/crates.io-index)",
  "text_unit 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1536,7 +1546,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum arrayref 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)" = "0d382e583f07208808f6b1249e60848879ba3543f57c32277bf52d69c2f0f0ee"
 "checksum arrayvec 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)" = "92c7fb76bc8826a8b33b4ee5bb07a247a81e76764ab4d55e8f73e3a4d8808c71"
 "checksum atty 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)" = "9a7d5b8723950951411ee34d271d99dddcc2035a16ab25310ea2c8cfd4369652"
-"checksum autocfg 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "4e5f34df7a019573fb8bdc7e24a2bfebe51a2a1d6bfdbaeccedb3c41fc574727"
+"checksum autocfg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "a6d640bee2da49f60a4068a7fae53acde8982514ab7bae8b8cea9e88cbcfd799"
 "checksum backtrace 0.3.13 (registry+https://github.com/rust-lang/crates.io-index)" = "b5b493b66e03090ebc4343eb02f94ff944e0cbc9ac6571491d170ba026741eb5"
 "checksum backtrace-sys 0.1.28 (registry+https://github.com/rust-lang/crates.io-index)" = "797c830ac25ccc92a7f8a7b9862bde440715531514594a6154e3d4a54dd769b6"
 "checksum base64 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "621fc7ecb8008f86d7fb9b95356cd692ce9514b80a86d85b397f32a22da7b9e2"
@@ -1571,7 +1581,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "795bd83d3abeb9220f257e597aa0080a508b27533824adf336529648f6abf7e2"
 "checksum failure_derive 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "ea1063915fd7ef4309e222a5a07cf9c319fb9c7836b1f89b85458672dbb127e1"
 "checksum fake-simd 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "e88a8acf291dafb59c2d96e8f59828f3838bb1a70398823ade51a84de6a6deed"
-"checksum flexi_logger 0.10.4 (registry+https://github.com/rust-lang/crates.io-index)" = "7d3681306880a7ce87740ceb3d1ce98ca92ae636ff30a629494488cbbcf85ff8"
+"checksum flexi_logger 0.10.5 (registry+https://github.com/rust-lang/crates.io-index)" = "bbd731387787f54fa333fa426e173fe42ea3d1123636b2b27ad802025fc5d182"
 "checksum fnv 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)" = "2fad85553e09a6f881f739c29f0b00b0f01357c743266d478b68951ce23285f3"
 "checksum fst 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "db72126ca7dff566cdbbdd54af44668c544897d9d3862b198141f176f1238bdf"
 "checksum fuchsia-zircon 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "2e9763c69ebaae630ba35f74888db465e49e259ba1bc0eda7d06f4a067615d82"
@@ -1581,7 +1591,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum heck 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "20564e78d53d2bb135c343b3f47714a56af2061f1c928fdb541dc7b9fdd94205"
 "checksum humansize 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b6cab2627acfc432780848602f3f558f7e9dd427352224b0d9324025796d2a5e"
 "checksum idna 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "38f09e0f0b1fb55fdee1f17470ad800da77af5186a1a76c026b679358b7e844e"
-"checksum im 12.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ae9c7f9bb8aee47fc16d535a705f7867a9fc83bb822e5e1043bb98e77ffeed3c"
+"checksum im 12.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "0627d417829c1d763d602687634869f254fc79f7e22dea6c824dab993db857e4"
 "checksum indexmap 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7e81a7c05f79578dbc15793d8b619db9ba32b4577003ef3af1a91c416798c58d"
 "checksum insta 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "60e94ba6dd3521d953caeed96f6ba06f4cdc9e30e398b3ee7acdd680294f87dc"
 "checksum itertools 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5b8467d9c1cebe26feb08c640139247fac215782d35371ade9a2136ed6085358"
@@ -1610,7 +1620,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum pest_derive 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "833d1ae558dc601e9a60366421196a8d94bc0ac980476d0b67e1d0988d72b2d0"
 "checksum pest_generator 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "63120576c4efd69615b5537d3d052257328a4ca82876771d6944424ccfd9f646"
 "checksum pest_meta 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f5a3492a4ed208ffc247adcdcc7ba2a95be3104f58877d0d02f0df39bf3efb5e"
-"checksum proc-macro2 0.4.24 (registry+https://github.com/rust-lang/crates.io-index)" = "77619697826f31a02ae974457af0b29b723e5619e113e9397b8b82c6bd253f09"
+"checksum proc-macro2 0.4.25 (registry+https://github.com/rust-lang/crates.io-index)" = "d3797b7142c9aa74954e351fc089bbee7958cebbff6bf2815e7ffff0b19f547d"
 "checksum proptest 0.8.7 (registry+https://github.com/rust-lang/crates.io-index)" = "926d0604475349f463fe44130aae73f2294b5309ab2ca0310b998bd334ef191f"
 "checksum quick-error 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "9274b940887ce9addde99c4eee6b5c44cc494b182b97e73dc8ffdcb3397fd3f0"
 "checksum quote 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)" = "53fa22a1994bd0f9372d7a816207d8a2677ad0325b073f5c5332760f0fb62b5c"
@@ -1640,14 +1650,15 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
 "checksum rusty-fork 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "9591f190d2852720b679c21f66ad929f9f1d7bb09d1193c26167586029d8489c"
 "checksum ryu 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)" = "eb9e9b8cde282a9fe6a42dd4681319bfb63f121b8a8ee9439c6f4107e58a46f7"
-"checksum salsa 0.9.2 (registry+https://github.com/rust-lang/crates.io-index)" = "c73fd43ecb8ec5fbe64828ced981075b828109f011620d0fa1b66e9e983ceb84"
+"checksum salsa 0.10.0-alpha1 (registry+https://github.com/rust-lang/crates.io-index)" = "4cc048429df53bf0720b93cfa5fa8c3fc3dc7dd65ab41b3f754a8870e7b5c834"
+"checksum salsa-macros 0.10.0-alpha1 (registry+https://github.com/rust-lang/crates.io-index)" = "0d5a1aeb618da4b1a00d2885d045154ac30deb04109f3ce73c1fd789caba4fb1"
 "checksum same-file 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "8f20c4be53a8a1ff4c1f1b2bd14570d2f634628709752f0702ecdd2b3f9a5267"
 "checksum scopeguard 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "94258f53601af11e6a49f722422f6e3425c52b06245a5cf9bc09908b174f5e27"
 "checksum semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
 "checksum semver-parser 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
 "checksum serde 1.0.84 (registry+https://github.com/rust-lang/crates.io-index)" = "0e732ed5a5592c17d961555e3b552985baf98d50ce418b7b655f31f6ba7eb1b7"
 "checksum serde_derive 1.0.84 (registry+https://github.com/rust-lang/crates.io-index)" = "b4d6115a3ca25c224e409185325afc16a0d5aaaabc15c42b09587d6f1ba39a5b"
-"checksum serde_json 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)" = "dfb1277d4d0563e4593e0b8b5d23d744d277b55d2bc0bf1c38d0d8a6589d38aa"
+"checksum serde_json 1.0.36 (registry+https://github.com/rust-lang/crates.io-index)" = "574378d957d6dcdf1bbb5d562a15cbd5e644159432f84634b94e485267abbcc7"
 "checksum sha-1 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "51b9d1f3b5de8a167ab06834a7c883bd197f2191e1dda1a22d9ccfeedbf9aded"
 "checksum slug 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "b3bc762e6a4b6c6fcaade73e77f9ebc6991b676f88bb2358bddb56560f073373"
 "checksum smallvec 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)" = "b73ea3738b47563803ef814925e69be00799a8c07420be8b996f8e98fb2336db"
@@ -1655,7 +1666,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum stable_deref_trait 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "dba1a27d3efae4351c8051072d619e3ade2820635c3958d826bfea39d59b54c8"
 "checksum strsim 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "bb4f380125926a99e52bc279241539c018323fab05ad6368b56f93d9369ff550"
 "checksum superslice 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b50b13d42370e0f5fc62eafdd5c2d20065eaf5458dab215ff3e20e63eea96b30"
-"checksum syn 0.15.25 (registry+https://github.com/rust-lang/crates.io-index)" = "71b7693d9626935a362a3d1d4e59380800a919ebfa478d77a4f49e2a6d2c3ad5"
+"checksum syn 0.15.26 (registry+https://github.com/rust-lang/crates.io-index)" = "f92e629aa1d9c827b2bb8297046c1ccffc57c99b947a680d3ccff1f136a3bee9"
 "checksum synstructure 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)" = "73687139bf99285483c96ac0add482c3776528beac1d97d444f6e91f203a2015"
 "checksum tempfile 3.0.5 (registry+https://github.com/rust-lang/crates.io-index)" = "7e91405c14320e5c79b3d148e1c86f40749a36e490642202a31689cb1a3452b2"
 "checksum tera 0.11.20 (registry+https://github.com/rust-lang/crates.io-index)" = "4b505279e19d8f7d24b1a9dc58327c9c36174b1a2c7ebdeac70792d017cb64f3"
diff --git a/crates/ra_db/Cargo.toml b/crates/ra_db/Cargo.toml
index 21d987688..bb1b5eae7 100644
--- a/crates/ra_db/Cargo.toml
+++ b/crates/ra_db/Cargo.toml
@@ -6,7 +6,7 @@ authors = ["Aleksey Kladov <[email protected]>"]
 
 [dependencies]
 relative-path = "0.4.0"
-salsa = "0.9.2"
+salsa = "0.10.0-alpha1"
 rustc-hash = "1.0"
 parking_lot = "0.7.0"
 ra_arena = { path = "../ra_arena" }
diff --git a/crates/ra_db/src/input.rs b/crates/ra_db/src/input.rs
index 2b761ea0c..b5d63e820 100644
--- a/crates/ra_db/src/input.rs
+++ b/crates/ra_db/src/input.rs
@@ -146,46 +146,31 @@ impl CrateGraph {
     }
 }
 
-salsa::query_group! {
-    pub trait FilesDatabase: salsa::Database {
-        /// Text of the file.
-        fn file_text(file_id: FileId) -> Arc<String> {
-            type FileTextQuery;
-            storage input;
-        }
-        /// Path to a file, relative to the root of its source root.
-        fn file_relative_path(file_id: FileId) -> RelativePathBuf {
-            type FileRelativePathQuery;
-            storage input;
-        }
-        /// Source root of the file.
-        fn file_source_root(file_id: FileId) -> SourceRootId {
-            type FileSourceRootQuery;
-            storage input;
-        }
-        /// Contents of the source root.
-        fn source_root(id: SourceRootId) -> Arc<SourceRoot> {
-            type SourceRootQuery;
-            storage input;
-        }
-        /// The set of "local" (that is, from the current workspace) roots.
-        /// Files in local roots are assumed to change frequently.
-        fn local_roots() -> Arc<Vec<SourceRootId>> {
-            type LocalRootsQuery;
-            storage input;
-        }
-        /// The set of roots for crates.io libraries.
-        /// Files in libraries are assumed to never change.
-        fn library_roots() -> Arc<Vec<SourceRootId>> {
-            type LibraryRootsQuery;
-            storage input;
-        }
-        /// The crate graph.
-        fn crate_graph() -> Arc<CrateGraph> {
-            type CrateGraphQuery;
-            storage input;
-        }
-    }
+#[salsa::query_group]
+pub trait FilesDatabase: salsa::Database {
+    /// Text of the file.
+    #[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;
+    /// Source root of the file.
+    #[salsa::input]
+    fn file_source_root(&self, file_id: FileId) -> SourceRootId;
+    /// Contents of the source root.
+    #[salsa::input]
+    fn source_root(&self, id: SourceRootId) -> Arc<SourceRoot>;
+    /// The set of "local" (that is, from the current workspace) roots.
+    /// Files in local roots are assumed to change frequently.
+    #[salsa::input]
+    fn local_roots(&self) -> Arc<Vec<SourceRootId>>;
+    /// The set of roots for crates.io libraries.
+    /// Files in libraries are assumed to never change.
+    #[salsa::input]
+    fn library_roots(&self) -> Arc<Vec<SourceRootId>>;
+    /// The crate graph.
+    #[salsa::input]
+    fn crate_graph(&self) -> Arc<CrateGraph>;
 }
 
 #[cfg(test)]
diff --git a/crates/ra_db/src/lib.rs b/crates/ra_db/src/lib.rs
index 89113e7a6..dbeb9ec71 100644
--- a/crates/ra_db/src/lib.rs
+++ b/crates/ra_db/src/lib.rs
@@ -9,6 +9,7 @@ use std::panic;
 
 use ra_syntax::{TextUnit, TextRange, SourceFile, TreeArc};
 
+pub use ::salsa as salsa;
 pub use crate::{
     cancellation::Canceled,
     syntax_ptr::LocalSyntaxPtr,
@@ -51,12 +52,9 @@ pub trait BaseDatabase: salsa::Database + panic::RefUnwindSafe {
     }
 }
 
-salsa::query_group! {
-    pub trait SyntaxDatabase: crate::input::FilesDatabase + BaseDatabase {
-        fn source_file(file_id: FileId) -> TreeArc<SourceFile> {
-            type SourceFileQuery;
-        }
-    }
+#[salsa::query_group]
+pub trait SyntaxDatabase: crate::input::FilesDatabase + BaseDatabase {
+    fn source_file(&self, file_id: FileId) -> TreeArc<SourceFile>;
 }
 
 fn source_file(db: &impl SyntaxDatabase, file_id: FileId) -> TreeArc<SourceFile> {
diff --git a/crates/ra_hir/Cargo.toml b/crates/ra_hir/Cargo.toml
index 415848f09..87d2e98e9 100644
--- a/crates/ra_hir/Cargo.toml
+++ b/crates/ra_hir/Cargo.toml
@@ -8,7 +8,6 @@ authors = ["Aleksey Kladov <[email protected]>"]
 arrayvec = "0.4.10"
 log = "0.4.5"
 relative-path = "0.4.0"
-salsa = "0.9.2"
 rustc-hash = "1.0"
 parking_lot = "0.7.0"
 ena = "0.11"
diff --git a/crates/ra_hir/src/db.rs b/crates/ra_hir/src/db.rs
index 0a0994f5f..b42f10071 100644
--- a/crates/ra_hir/src/db.rs
+++ b/crates/ra_hir/src/db.rs
@@ -1,7 +1,7 @@
 use std::sync::Arc;
 
 use ra_syntax::{SyntaxNode, TreeArc, SourceFile};
-use ra_db::{SourceRootId, LocationIntener, SyntaxDatabase};
+use ra_db::{SourceRootId, LocationIntener, SyntaxDatabase, salsa};
 
 use crate::{
     DefLoc, DefId, MacroCallLoc, MacroCallId, Name, HirFileId,
@@ -16,111 +16,77 @@ use crate::{
     impl_block::ModuleImplBlocks,
 };
 
-salsa::query_group! {
-
-pub trait HirDatabase: SyntaxDatabase
+#[salsa::query_group]
+pub trait HirDatabase:
+    SyntaxDatabase
     + AsRef<LocationIntener<DefLoc, DefId>>
     + AsRef<LocationIntener<MacroCallLoc, MacroCallId>>
 {
-    fn hir_source_file(file_id: HirFileId) -> TreeArc<SourceFile> {
-        type HirSourceFileQuery;
-        use fn HirFileId::hir_source_file;
-    }
-
-    fn expand_macro_invocation(invoc: MacroCallId) -> Option<Arc<MacroExpansion>> {
-        type ExpandMacroCallQuery;
-        use fn crate::macros::expand_macro_invocation;
-    }
-
-    fn fn_scopes(def_id: DefId) -> Arc<FnScopes> {
-        type FnScopesQuery;
-        use fn query_definitions::fn_scopes;
-    }
-
-    fn struct_data(def_id: DefId) -> Arc<StructData> {
-        type StructDataQuery;
-        use fn crate::adt::StructData::struct_data_query;
-    }
-
-    fn enum_data(def_id: DefId) -> Arc<EnumData> {
-        type EnumDataQuery;
-        use fn crate::adt::EnumData::enum_data_query;
-    }
-
-    fn enum_variant_data(def_id: DefId) -> Arc<EnumVariantData> {
-        type EnumVariantDataQuery;
-        use fn crate::adt::EnumVariantData::enum_variant_data_query;
-    }
-
-    fn infer(def_id: DefId) -> Arc<InferenceResult> {
-        type InferQuery;
-        use fn crate::ty::infer;
-    }
-
-    fn type_for_def(def_id: DefId) -> Ty {
-        type TypeForDefQuery;
-        use fn crate::ty::type_for_def;
-    }
-
-    fn type_for_field(def_id: DefId, field: Name) -> Option<Ty> {
-        type TypeForFieldQuery;
-        use fn crate::ty::type_for_field;
-    }
-
-    fn file_items(file_id: HirFileId) -> Arc<SourceFileItems> {
-        type SourceFileItemsQuery;
-        use fn query_definitions::file_items;
-    }
-
-    fn file_item(source_item_id: SourceItemId) -> TreeArc<SyntaxNode> {
-        type FileItemQuery;
-        use fn query_definitions::file_item;
-    }
-
-    fn submodules(source: SourceItemId) -> Arc<Vec<crate::module_tree::Submodule>> {
-        type SubmodulesQuery;
-        use fn crate::module_tree::Submodule::submodules_query;
-    }
-
-    fn input_module_items(source_root_id: SourceRootId, module_id: ModuleId) -> Arc<InputModuleItems> {
-        type InputModuleItemsQuery;
-        use fn query_definitions::input_module_items;
-    }
-
-    fn item_map(source_root_id: SourceRootId) -> Arc<ItemMap> {
-        type ItemMapQuery;
-        use fn query_definitions::item_map;
-    }
-
-    fn module_tree(source_root_id: SourceRootId) -> Arc<ModuleTree> {
-        type ModuleTreeQuery;
-        use fn crate::module_tree::ModuleTree::module_tree_query;
-    }
-
-    fn impls_in_module(source_root_id: SourceRootId, module_id: ModuleId) -> Arc<ModuleImplBlocks> {
-        type ImplsInModuleQuery;
-        use fn crate::impl_block::impls_in_module;
-    }
-
-    fn impls_in_crate(krate: Crate) -> Arc<CrateImplBlocks> {
-        type ImplsInCrateQuery;
-        use fn crate::ty::method_resolution::CrateImplBlocks::impls_in_crate_query;
-    }
-
-    fn body_hir(def_id: DefId) -> Arc<crate::expr::Body> {
-        type BodyHirQuery;
-        use fn crate::expr::body_hir;
-    }
-
-    fn body_syntax_mapping(def_id: DefId) -> Arc<crate::expr::BodySyntaxMapping> {
-        type BodySyntaxMappingQuery;
-        use fn crate::expr::body_syntax_mapping;
-    }
-
-    fn fn_signature(def_id: DefId) -> Arc<FnSignature> {
-        type FnSignatureQuery;
-        use fn crate::FnSignature::fn_signature_query;
-    }
-}
+    #[salsa::invoke(HirFileId::hir_source_file)]
+    fn hir_source_file(&self, file_id: HirFileId) -> TreeArc<SourceFile>;
+
+    #[salsa::invoke(crate::macros::expand_macro_invocation)]
+    fn expand_macro_invocation(&self, invoc: MacroCallId) -> Option<Arc<MacroExpansion>>;
+
+    #[salsa::invoke(query_definitions::fn_scopes)]
+    fn fn_scopes(&self, def_id: DefId) -> Arc<FnScopes>;
+
+    #[salsa::invoke(crate::adt::StructData::struct_data_query)]
+    fn struct_data(&self, def_id: DefId) -> Arc<StructData>;
+
+    #[salsa::invoke(crate::adt::EnumData::enum_data_query)]
+    fn enum_data(&self, def_id: DefId) -> Arc<EnumData>;
+
+    #[salsa::invoke(crate::adt::EnumVariantData::enum_variant_data_query)]
+    fn enum_variant_data(&self, def_id: DefId) -> Arc<EnumVariantData>;
+
+    #[salsa::invoke(crate::ty::infer)]
+    fn infer(&self, def_id: DefId) -> Arc<InferenceResult>;
+
+    #[salsa::invoke(crate::ty::type_for_def)]
+    fn type_for_def(&self, def_id: DefId) -> Ty;
+
+    #[salsa::invoke(crate::ty::type_for_field)]
+    fn type_for_field(&self, def_id: DefId, field: Name) -> Option<Ty>;
+
+    #[salsa::invoke(query_definitions::file_items)]
+    fn file_items(&self, file_id: HirFileId) -> Arc<SourceFileItems>;
+
+    #[salsa::invoke(query_definitions::file_item)]
+    fn file_item(&self, source_item_id: SourceItemId) -> TreeArc<SyntaxNode>;
+
+    #[salsa::invoke(crate::module_tree::Submodule::submodules_query)]
+    fn submodules(&self, source: SourceItemId) -> Arc<Vec<crate::module_tree::Submodule>>;
+
+    #[salsa::invoke(query_definitions::input_module_items)]
+    fn input_module_items(
+        &self,
+        source_root_id: SourceRootId,
+        module_id: ModuleId,
+    ) -> Arc<InputModuleItems>;
+
+    #[salsa::invoke(query_definitions::item_map)]
+    fn item_map(&self, source_root_id: SourceRootId) -> Arc<ItemMap>;
+
+    #[salsa::invoke(crate::module_tree::ModuleTree::module_tree_query)]
+    fn module_tree(&self, source_root_id: SourceRootId) -> Arc<ModuleTree>;
+
+    #[salsa::invoke(crate::impl_block::impls_in_module)]
+    fn impls_in_module(
+        &self,
+        source_root_id: SourceRootId,
+        module_id: ModuleId,
+    ) -> Arc<ModuleImplBlocks>;
+
+    #[salsa::invoke(crate::ty::method_resolution::CrateImplBlocks::impls_in_crate_query)]
+    fn impls_in_crate(&self, krate: Crate) -> Arc<CrateImplBlocks>;
+
+    #[salsa::invoke(crate::expr::body_hir)]
+    fn body_hir(&self, def_id: DefId) -> Arc<crate::expr::Body>;
+
+    #[salsa::invoke(crate::expr::body_syntax_mapping)]
+    fn body_syntax_mapping(&self, def_id: DefId) -> Arc<crate::expr::BodySyntaxMapping>;
 
+    #[salsa::invoke(crate::FnSignature::fn_signature_query)]
+    fn fn_signature(&self, def_id: DefId) -> Arc<FnSignature>;
 }
diff --git a/crates/ra_hir/src/mock.rs b/crates/ra_hir/src/mock.rs
index 9371c5a0d..a83a5c6cc 100644
--- a/crates/ra_hir/src/mock.rs
+++ b/crates/ra_hir/src/mock.rs
@@ -1,8 +1,10 @@
 use std::{sync::Arc, panic};
 
 use parking_lot::Mutex;
-use salsa::{self, Database};
-use ra_db::{LocationIntener, BaseDatabase, FilePosition, FileId, CrateGraph, SourceRoot, SourceRootId};
+use ra_db::{
+    LocationIntener, BaseDatabase, FilePosition, FileId, CrateGraph, SourceRoot, SourceRootId,
+    salsa::{self, Database},
+};
 use relative_path::RelativePathBuf;
 use test_utils::{parse_fixture, CURSOR_MARKER, extract_offset};
 
@@ -220,10 +222,10 @@ salsa::database_storage! {
         }
         impl db::HirDatabase {
             fn hir_source_file() for db::HirSourceFileQuery;
-            fn expand_macro_invocation() for db::ExpandMacroCallQuery;
+            fn expand_macro_invocation() for db::ExpandMacroInvocationQuery;
             fn module_tree() for db::ModuleTreeQuery;
             fn fn_scopes() for db::FnScopesQuery;
-            fn file_items() for db::SourceFileItemsQuery;
+            fn file_items() for db::FileItemsQuery;
             fn file_item() for db::FileItemQuery;
             fn input_module_items() for db::InputModuleItemsQuery;
             fn item_map() for db::ItemMapQuery;
diff --git a/crates/ra_hir/src/nameres/tests.rs b/crates/ra_hir/src/nameres/tests.rs
index 9a0474045..0ec11ec12 100644
--- a/crates/ra_hir/src/nameres/tests.rs
+++ b/crates/ra_hir/src/nameres/tests.rs
@@ -1,7 +1,6 @@
 use std::sync::Arc;
 
-use salsa::Database;
-use ra_db::{FilesDatabase, CrateGraph, SourceRootId};
+use ra_db::{FilesDatabase, CrateGraph, SourceRootId, salsa::Database};
 use relative_path::RelativePath;
 use test_utils::assert_eq_text;
 
diff --git a/crates/ra_hir/src/ty/tests.rs b/crates/ra_hir/src/ty/tests.rs
index affd63a85..a430cbe88 100644
--- a/crates/ra_hir/src/ty/tests.rs
+++ b/crates/ra_hir/src/ty/tests.rs
@@ -3,9 +3,7 @@ use std::fmt::Write;
 use std::path::{PathBuf, Path};
 use std::fs;
 
-use salsa::Database;
-
-use ra_db::SyntaxDatabase;
+use ra_db::{SyntaxDatabase, salsa::Database};
 use ra_syntax::ast::{self, AstNode};
 use test_utils::{project_dir, assert_eq_text, read_text};
 
diff --git a/crates/ra_ide_api/Cargo.toml b/crates/ra_ide_api/Cargo.toml
index 022cbd5a3..702c11932 100644
--- a/crates/ra_ide_api/Cargo.toml
+++ b/crates/ra_ide_api/Cargo.toml
@@ -10,7 +10,6 @@ log = "0.4.5"
 relative-path = "0.4.0"
 rayon = "1.0.2"
 fst = "0.3.1"
-salsa = "0.9.2"
 rustc-hash = "1.0"
 parking_lot = "0.7.0"
 unicase = "2.2.0"
diff --git a/crates/ra_ide_api/src/db.rs b/crates/ra_ide_api/src/db.rs
index 60f84675d..36778b955 100644
--- a/crates/ra_ide_api/src/db.rs
+++ b/crates/ra_ide_api/src/db.rs
@@ -1,7 +1,9 @@
 use std::{fmt, sync::Arc};
 
-use salsa::{self, Database};
-use ra_db::{LocationIntener, BaseDatabase, FileId, Canceled};
+use ra_db::{
+    LocationIntener, BaseDatabase, FileId, Canceled,
+    salsa::{self, Database},
+};
 
 use crate::{symbol_index, LineIndex};
 
@@ -73,12 +75,9 @@ impl AsRef<LocationIntener<hir::MacroCallLoc, hir::MacroCallId>> for RootDatabas
     }
 }
 
-salsa::query_group! {
-    pub(crate) trait LineIndexDatabase: ra_db::FilesDatabase + BaseDatabase {
-        fn line_index(file_id: FileId) -> Arc<LineIndex> {
-            type LineIndexQuery;
-        }
-    }
+#[salsa::query_group]
+pub(crate) trait LineIndexDatabase: ra_db::FilesDatabase + BaseDatabase {
+    fn line_index(&self, file_id: FileId) -> Arc<LineIndex>;
 }
 
 fn line_index(db: &impl ra_db::FilesDatabase, file_id: FileId) -> Arc<LineIndex> {
@@ -109,10 +108,10 @@ salsa::database_storage! {
         }
         impl hir::db::HirDatabase {
             fn hir_source_file() for hir::db::HirSourceFileQuery;
-            fn expand_macro_invocation() for hir::db::ExpandMacroCallQuery;
+            fn expand_macro_invocation() for hir::db::ExpandMacroInvocationQuery;
             fn module_tree() for hir::db::ModuleTreeQuery;
             fn fn_scopes() for hir::db::FnScopesQuery;
-            fn file_items() for hir::db::SourceFileItemsQuery;
+            fn file_items() for hir::db::FileItemsQuery;
             fn file_item() for hir::db::FileItemQuery;
             fn input_module_items() for hir::db::InputModuleItemsQuery;
             fn item_map() for hir::db::ItemMapQuery;
diff --git a/crates/ra_ide_api/src/imp.rs b/crates/ra_ide_api/src/imp.rs
index 61771ed40..28e497965 100644
--- a/crates/ra_ide_api/src/imp.rs
+++ b/crates/ra_ide_api/src/imp.rs
@@ -1,11 +1,12 @@
 use std::sync::Arc;
 
-use salsa::Database;
-
 use hir::{
     self, Problem, source_binder,
 };
-use ra_db::{FilesDatabase, SourceRoot, SourceRootId, SyntaxDatabase};
+use ra_db::{
+    FilesDatabase, SourceRoot, SourceRootId, SyntaxDatabase,
+    salsa::{self, Database},
+};
 use ra_ide_api_light::{self, assists, LocalEdit, Severity};
 use ra_syntax::{
     TextRange, AstNode, SourceFile,
@@ -89,7 +90,7 @@ impl db::RootDatabase {
     fn gc_syntax_trees(&mut self) {
         self.query(ra_db::SourceFileQuery)
             .sweep(salsa::SweepStrategy::default().discard_values());
-        self.query(hir::db::SourceFileItemsQuery)
+        self.query(hir::db::FileItemsQuery)
             .sweep(salsa::SweepStrategy::default().discard_values());
         self.query(hir::db::FileItemQuery)
             .sweep(salsa::SweepStrategy::default().discard_values());
diff --git a/crates/ra_ide_api/src/lib.rs b/crates/ra_ide_api/src/lib.rs
index 3a0d2dbbe..7b47d7b6d 100644
--- a/crates/ra_ide_api/src/lib.rs
+++ b/crates/ra_ide_api/src/lib.rs
@@ -28,11 +28,13 @@ use std::{fmt, sync::Arc};
 
 use ra_syntax::{SourceFile, TreeArc, TextRange, TextUnit};
 use ra_text_edit::TextEdit;
-use ra_db::{SyntaxDatabase, FilesDatabase, BaseDatabase};
+use ra_db::{
+    SyntaxDatabase, FilesDatabase, BaseDatabase,
+    salsa::{self, ParallelDatabase},
+};
 use rayon::prelude::*;
 use relative_path::RelativePathBuf;
 use rustc_hash::FxHashMap;
-use salsa::ParallelDatabase;
 
 use crate::{
     symbol_index::{FileSymbol, SymbolIndex},
diff --git a/crates/ra_ide_api/src/symbol_index.rs b/crates/ra_ide_api/src/symbol_index.rs
index 74165d68f..bfa2f3469 100644
--- a/crates/ra_ide_api/src/symbol_index.rs
+++ b/crates/ra_ide_api/src/symbol_index.rs
@@ -32,8 +32,10 @@ use ra_syntax::{
     SyntaxKind::{self, *},
     ast::{self, NameOwner},
 };
-use ra_db::{SourceRootId, FilesDatabase, LocalSyntaxPtr};
-use salsa::ParallelDatabase;
+use ra_db::{
+    SourceRootId, FilesDatabase, LocalSyntaxPtr,
+    salsa::{self, ParallelDatabase},
+};
 use rayon::prelude::*;
 
 use crate::{
@@ -41,16 +43,11 @@ use crate::{
     db::RootDatabase,
 };
 
-salsa::query_group! {
-    pub(crate) trait SymbolsDatabase: hir::db::HirDatabase {
-        fn file_symbols(file_id: FileId) -> Arc<SymbolIndex> {
-            type FileSymbolsQuery;
-        }
-        fn library_symbols(id: SourceRootId) -> Arc<SymbolIndex> {
-            type LibrarySymbolsQuery;
-            storage input;
-        }
-    }
+#[salsa::query_group]
+pub(crate) trait SymbolsDatabase: hir::db::HirDatabase {
+    fn file_symbols(&self, file_id: FileId) -> Arc<SymbolIndex>;
+    #[salsa::input]
+    fn library_symbols(&self, id: SourceRootId) -> Arc<SymbolIndex>;
 }
 
 fn file_symbols(db: &impl SymbolsDatabase, file_id: FileId) -> Arc<SymbolIndex> {