12 files changed, 278 insertions, 90 deletions

diff --git a/crates/ra_assists/src/handlers/add_explicit_type.rs b/crates/ra_assists/src/handlers/add_explicit_type.rs
index 146cc75df..7ced00626 100644
--- a/crates/ra_assists/src/handlers/add_explicit_type.rs
+++ b/crates/ra_assists/src/handlers/add_explicit_type.rs
@@ -209,7 +209,7 @@ struct Test<K, T = u8> {
 }
 
 fn main() {
-    let test<|>: Test<i32, u8> = Test { t: 23, k: 33 };
+    let test<|>: Test<i32> = Test { t: 23, k: 33 };
 }"#,
         );
     }
diff --git a/crates/ra_assists/src/handlers/unwrap_block.rs b/crates/ra_assists/src/handlers/unwrap_block.rs
index eba0631a4..e52ec557e 100644
--- a/crates/ra_assists/src/handlers/unwrap_block.rs
+++ b/crates/ra_assists/src/handlers/unwrap_block.rs
@@ -1,6 +1,6 @@
 use crate::{AssistContext, AssistId, Assists};
 
-use ast::LoopBodyOwner;
+use ast::{ElseBranch, Expr, LoopBodyOwner};
 use ra_fmt::unwrap_trivial_block;
 use ra_syntax::{ast, match_ast, AstNode, TextRange, T};
 
@@ -25,19 +25,11 @@ pub(crate) fn unwrap_block(acc: &mut Assists, ctx: &AssistContext) -> Option<()>
     let l_curly_token = ctx.find_token_at_offset(T!['{'])?;
     let block = ast::BlockExpr::cast(l_curly_token.parent())?;
     let parent = block.syntax().parent()?;
+    let assist_id = AssistId("unwrap_block");
+    let assist_label = "Unwrap block";
+
     let (expr, expr_to_unwrap) = match_ast! {
         match parent {
-            ast::IfExpr(if_expr) => {
-                let expr_to_unwrap = if_expr.blocks().find_map(|expr| extract_expr(ctx.frange.range, expr));
-                let expr_to_unwrap = expr_to_unwrap?;
-                // Find if we are in a else if block
-                let ancestor = if_expr.syntax().parent().and_then(ast::IfExpr::cast);
-
-                match ancestor {
-                    None => (ast::Expr::IfExpr(if_expr), expr_to_unwrap),
-                    Some(ancestor) => (ast::Expr::IfExpr(ancestor), expr_to_unwrap),
-                }
-            },
             ast::ForExpr(for_expr) => {
                 let block_expr = for_expr.loop_body()?;
                 let expr_to_unwrap = extract_expr(ctx.frange.range, block_expr)?;
@@ -53,27 +45,62 @@ pub(crate) fn unwrap_block(acc: &mut Assists, ctx: &AssistContext) -> Option<()>
                 let expr_to_unwrap = extract_expr(ctx.frange.range, block_expr)?;
                 (ast::Expr::LoopExpr(loop_expr), expr_to_unwrap)
             },
+            ast::IfExpr(if_expr) => {
+                let mut resp = None;
+
+                let then_branch = if_expr.then_branch()?;
+                if then_branch.l_curly_token()?.text_range().contains_range(ctx.frange.range) {
+                    if let Some(ancestor) = if_expr.syntax().parent().and_then(ast::IfExpr::cast) {
+                        // For `else if` blocks
+                        let ancestor_then_branch = ancestor.then_branch()?;
+                        let l_curly_token = then_branch.l_curly_token()?;
+
+                        let target = then_branch.syntax().text_range();
+                        return acc.add(assist_id, assist_label, target, |edit| {
+                            let range_to_del_else_if = TextRange::new(ancestor_then_branch.syntax().text_range().end(), l_curly_token.text_range().start());
+                            let range_to_del_rest = TextRange::new(then_branch.syntax().text_range().end(), if_expr.syntax().text_range().end());
+
+                            edit.set_cursor(ancestor_then_branch.syntax().text_range().end());
+                            edit.delete(range_to_del_rest);
+                            edit.delete(range_to_del_else_if);
+                            edit.replace(target, update_expr_string(then_branch.to_string(), &[' ', '{']));
+                        });
+                    } else {
+                        resp = Some((ast::Expr::IfExpr(if_expr.clone()), Expr::BlockExpr(then_branch)));
+                    }
+                } else if let Some(else_branch) = if_expr.else_branch() {
+                    match else_branch {
+                        ElseBranch::Block(else_block) => {
+                            let l_curly_token = else_block.l_curly_token()?;
+                            if l_curly_token.text_range().contains_range(ctx.frange.range) {
+                                let target = else_block.syntax().text_range();
+                                return acc.add(assist_id, assist_label, target, |edit| {
+                                    let range_to_del = TextRange::new(then_branch.syntax().text_range().end(), l_curly_token.text_range().start());
+
+                                    edit.set_cursor(then_branch.syntax().text_range().end());
+                                    edit.delete(range_to_del);
+                                    edit.replace(target, update_expr_string(else_block.to_string(), &[' ', '{']));
+                                });
+                            }
+                        },
+                        ElseBranch::IfExpr(_) => {},
+                    }
+                }
+
+                resp?
+            },
             _ => return None,
         }
     };
 
     let target = expr_to_unwrap.syntax().text_range();
-    acc.add(AssistId("unwrap_block"), "Unwrap block", target, |edit| {
+    acc.add(assist_id, assist_label, target, |edit| {
         edit.set_cursor(expr.syntax().text_range().start());
 
-        let pat_start: &[_] = &[' ', '{', '\n'];
-        let expr_to_unwrap = expr_to_unwrap.to_string();
-        let expr_string = expr_to_unwrap.trim_start_matches(pat_start);
-        let mut expr_string_lines: Vec<&str> = expr_string.lines().collect();
-        expr_string_lines.pop(); // Delete last line
-
-        let expr_string = expr_string_lines
-            .into_iter()
-            .map(|line| line.replacen("    ", "", 1)) // Delete indentation
-            .collect::<Vec<String>>()
-            .join("\n");
-
-        edit.replace(expr.syntax().text_range(), expr_string);
+        edit.replace(
+            expr.syntax().text_range(),
+            update_expr_string(expr_to_unwrap.to_string(), &[' ', '{', '\n']),
+        );
     })
 }
 
@@ -87,6 +114,18 @@ fn extract_expr(cursor_range: TextRange, block: ast::BlockExpr) -> Option<ast::E
     }
 }
 
+fn update_expr_string(expr_str: String, trim_start_pat: &[char]) -> String {
+    let expr_string = expr_str.trim_start_matches(trim_start_pat);
+    let mut expr_string_lines: Vec<&str> = expr_string.lines().collect();
+    expr_string_lines.pop(); // Delete last line
+
+    expr_string_lines
+        .into_iter()
+        .map(|line| line.replacen("    ", "", 1)) // Delete indentation
+        .collect::<Vec<String>>()
+        .join("\n")
+}
+
 #[cfg(test)]
 mod tests {
     use crate::tests::{check_assist, check_assist_not_applicable};
@@ -142,7 +181,13 @@ mod tests {
             r#"
             fn main() {
                 bar();
-                <|>println!("bar");
+                if true {
+                    foo();
+
+                    //comment
+                    bar();
+                }<|>
+                println!("bar");
             }
             "#,
         );
@@ -170,7 +215,127 @@ mod tests {
             r#"
             fn main() {
                 //bar();
-                <|>println!("bar");
+                if true {
+                    println!("true");
+
+                    //comment
+                    //bar();
+                }<|>
+                println!("bar");
+            }
+            "#,
+        );
+    }
+
+    #[test]
+    fn simple_if_else_if_nested() {
+        check_assist(
+            unwrap_block,
+            r#"
+            fn main() {
+                //bar();
+                if true {
+                    println!("true");
+
+                    //comment
+                    //bar();
+                } else if false {
+                    println!("bar");
+                } else if true {<|>
+                    println!("foo");
+                }
+            }
+            "#,
+            r#"
+            fn main() {
+                //bar();
+                if true {
+                    println!("true");
+
+                    //comment
+                    //bar();
+                } else if false {
+                    println!("bar");
+                }<|>
+                println!("foo");
+            }
+            "#,
+        );
+    }
+
+    #[test]
+    fn simple_if_else_if_nested_else() {
+        check_assist(
+            unwrap_block,
+            r#"
+            fn main() {
+                //bar();
+                if true {
+                    println!("true");
+
+                    //comment
+                    //bar();
+                } else if false {
+                    println!("bar");
+                } else if true {
+                    println!("foo");
+                } else {<|>
+                    println!("else");
+                }
+            }
+            "#,
+            r#"
+            fn main() {
+                //bar();
+                if true {
+                    println!("true");
+
+                    //comment
+                    //bar();
+                } else if false {
+                    println!("bar");
+                } else if true {
+                    println!("foo");
+                }<|>
+                println!("else");
+            }
+            "#,
+        );
+    }
+
+    #[test]
+    fn simple_if_else_if_nested_middle() {
+        check_assist(
+            unwrap_block,
+            r#"
+            fn main() {
+                //bar();
+                if true {
+                    println!("true");
+
+                    //comment
+                    //bar();
+                } else if false {
+                    println!("bar");
+                } else if true {<|>
+                    println!("foo");
+                } else {
+                    println!("else");
+                }
+            }
+            "#,
+            r#"
+            fn main() {
+                //bar();
+                if true {
+                    println!("true");
+
+                    //comment
+                    //bar();
+                } else if false {
+                    println!("bar");
+                }<|>
+                println!("foo");
             }
             "#,
         );
diff --git a/crates/ra_flycheck/Cargo.toml b/crates/ra_flycheck/Cargo.toml
index 03e557148..eac502da5 100644
--- a/crates/ra_flycheck/Cargo.toml
+++ b/crates/ra_flycheck/Cargo.toml
@@ -11,7 +11,7 @@ doctest = false
 crossbeam-channel = "0.4.0"
 lsp-types = { version = "0.74.0", features = ["proposed"] }
 log = "0.4.8"
-cargo_metadata = "0.9.1"
+cargo_metadata = "0.10.0"
 serde_json = "1.0.48"
 jod-thread = "0.1.1"
 ra_toolchain = { path = "../ra_toolchain" }
diff --git a/crates/ra_flycheck/src/lib.rs b/crates/ra_flycheck/src/lib.rs
index 68dcee285..24af75c95 100644
--- a/crates/ra_flycheck/src/lib.rs
+++ b/crates/ra_flycheck/src/lib.rs
@@ -204,6 +204,8 @@ impl FlycheckThread {
             }
 
             CheckEvent::Msg(Message::BuildScriptExecuted(_msg)) => {}
+            CheckEvent::Msg(Message::BuildFinished(_)) => {}
+            CheckEvent::Msg(Message::TextLine(_)) => {}
             CheckEvent::Msg(Message::Unknown) => {}
         }
     }
diff --git a/crates/ra_hir_ty/src/display.rs b/crates/ra_hir_ty/src/display.rs
index f5edaea8c..b9c4d2e89 100644
--- a/crates/ra_hir_ty/src/display.rs
+++ b/crates/ra_hir_ty/src/display.rs
@@ -136,6 +136,12 @@ enum DisplayTarget {
     SourceCode { module_id: ModuleId },
 }
 
+impl DisplayTarget {
+    fn is_source_code(&self) -> bool {
+        matches!(self, Self::SourceCode {..})
+    }
+}
+
 #[derive(Debug)]
 pub enum DisplaySourceCodeError {
     PathNotFound,
@@ -303,37 +309,40 @@ impl HirDisplay for ApplicationTy {
 
                 if self.parameters.len() > 0 {
                     let mut non_default_parameters = Vec::with_capacity(self.parameters.len());
-                    let parameters_to_write = if f.omit_verbose_types() {
-                        match self
-                            .ctor
-                            .as_generic_def()
-                            .map(|generic_def_id| f.db.generic_defaults(generic_def_id))
-                            .filter(|defaults| !defaults.is_empty())
-                        {
-                            None => self.parameters.0.as_ref(),
-                            Some(default_parameters) => {
-                                for (i, parameter) in self.parameters.iter().enumerate() {
-                                    match (parameter, default_parameters.get(i)) {
-                                        (&Ty::Unknown, _) | (_, None) => {
-                                            non_default_parameters.push(parameter.clone())
-                                        }
-                                        (_, Some(default_parameter))
-                                            if parameter != default_parameter =>
-                                        {
-                                            non_default_parameters.push(parameter.clone())
+                    let parameters_to_write =
+                        if f.display_target.is_source_code() || f.omit_verbose_types() {
+                            match self
+                                .ctor
+                                .as_generic_def()
+                                .map(|generic_def_id| f.db.generic_defaults(generic_def_id))
+                                .filter(|defaults| !defaults.is_empty())
+                            {
+                                None => self.parameters.0.as_ref(),
+                                Some(default_parameters) => {
+                                    for (i, parameter) in self.parameters.iter().enumerate() {
+                                        match (parameter, default_parameters.get(i)) {
+                                            (&Ty::Unknown, _) | (_, None) => {
+                                                non_default_parameters.push(parameter.clone())
+                                            }
+                                            (_, Some(default_parameter))
+                                                if parameter != default_parameter =>
+                                            {
+                                                non_default_parameters.push(parameter.clone())
+                                            }
+                                            _ => (),
                                         }
-                                        _ => (),
                                     }
+                                    &non_default_parameters
                                 }
-                                &non_default_parameters
                             }
-                        }
-                    } else {
-                        self.parameters.0.as_ref()
-                    };
-                    write!(f, "<")?;
-                    f.write_joined(parameters_to_write, ", ")?;
-                    write!(f, ">")?;
+                        } else {
+                            self.parameters.0.as_ref()
+                        };
+                    if !parameters_to_write.is_empty() {
+                        write!(f, "<")?;
+                        f.write_joined(parameters_to_write, ", ")?;
+                        write!(f, ">")?;
+                    }
                 }
             }
             TypeCtor::AssociatedType(type_alias) => {
diff --git a/crates/ra_hir_ty/src/tests/display_source_code.rs b/crates/ra_hir_ty/src/tests/display_source_code.rs
index ca1748615..4088b1d22 100644
--- a/crates/ra_hir_ty/src/tests/display_source_code.rs
+++ b/crates/ra_hir_ty/src/tests/display_source_code.rs
@@ -21,3 +21,30 @@ fn bar() {
     );
     assert_eq!("foo::Foo", displayed_source_at_pos(&db, pos));
 }
+
+#[test]
+fn omit_default_type_parameters() {
+    let (db, pos) = TestDB::with_position(
+        r"
+        //- /main.rs
+        struct Foo<T = u8> { t: T }
+        fn main() {
+            let foo = Foo { t: 5 };
+            foo<|>;
+        }
+        ",
+    );
+    assert_eq!("Foo", displayed_source_at_pos(&db, pos));
+
+    let (db, pos) = TestDB::with_position(
+        r"
+        //- /main.rs
+        struct Foo<K, T = u8> { k: K, t: T }
+        fn main() {
+            let foo = Foo { k: 400, t: 5 };
+            foo<|>;
+        }
+        ",
+    );
+    assert_eq!("Foo<i32>", displayed_source_at_pos(&db, pos));
+}
diff --git a/crates/ra_proc_macro_srv/Cargo.toml b/crates/ra_proc_macro_srv/Cargo.toml
index 886e14870..bb3003278 100644
--- a/crates/ra_proc_macro_srv/Cargo.toml
+++ b/crates/ra_proc_macro_srv/Cargo.toml
@@ -18,7 +18,7 @@ memmap = "0.7"
 test_utils = { path = "../test_utils" }
 
 [dev-dependencies]
-cargo_metadata = "0.9.1"
+cargo_metadata = "0.10.0"
 difference = "2.0.0"
 # used as proc macro test target
-serde_derive = "=1.0.106"
+serde_derive = "1.0.106"
diff --git a/crates/ra_proc_macro_srv/src/tests/fixtures/test_serialize_proc_macro.txt b/crates/ra_proc_macro_srv/src/tests/fixtures/test_serialize_proc_macro.txt
index 6776f5231..bc010cfe9 100644
--- a/crates/ra_proc_macro_srv/src/tests/fixtures/test_serialize_proc_macro.txt
+++ b/crates/ra_proc_macro_srv/src/tests/fixtures/test_serialize_proc_macro.txt
@@ -23,23 +23,12 @@ SUBTREE $
     SUBTREE [] 4294967295
       IDENT   allow 4294967295
       SUBTREE () 4294967295
-        IDENT   unknown_lints 4294967295
-    PUNCH   # [alone] 4294967295
-    SUBTREE [] 4294967295
-      IDENT   cfg_attr 4294967295
-      SUBTREE () 4294967295
-        IDENT   feature 4294967295
-        PUNCH   = [alone] 4294967295
-        LITERAL "cargo-clippy" 0
-        PUNCH   , [alone] 4294967295
-        IDENT   allow 4294967295
-        SUBTREE () 4294967295
-          IDENT   useless_attribute 4294967295
-    PUNCH   # [alone] 4294967295
-    SUBTREE [] 4294967295
-      IDENT   allow 4294967295
-      SUBTREE () 4294967295
         IDENT   rust_2018_idioms 4294967295
+        PUNCH   , [alone] 4294967295
+        IDENT   clippy 4294967295
+        PUNCH   : [joint] 4294967295
+        PUNCH   : [alone] 4294967295
+        IDENT   useless_attribute 4294967295
     IDENT   extern 4294967295
     IDENT   crate 4294967295
     IDENT   serde 4294967295
diff --git a/crates/ra_proc_macro_srv/src/tests/mod.rs b/crates/ra_proc_macro_srv/src/tests/mod.rs
index 9cf58511c..82cefbb29 100644
--- a/crates/ra_proc_macro_srv/src/tests/mod.rs
+++ b/crates/ra_proc_macro_srv/src/tests/mod.rs
@@ -10,7 +10,7 @@ fn test_derive_serialize_proc_macro() {
     assert_expand(
         "serde_derive",
         "Serialize",
-        "1.0.106",
+        "1.0",
         r##"struct Foo {}"##,
         include_str!("fixtures/test_serialize_proc_macro.txt"),
     );
@@ -21,7 +21,7 @@ fn test_derive_serialize_proc_macro_failed() {
     assert_expand(
         "serde_derive",
         "Serialize",
-        "1.0.106",
+        "1.0",
         r##"
     struct {}
 "##,
@@ -37,7 +37,7 @@ SUBTREE $
 
 #[test]
 fn test_derive_proc_macro_list() {
-    let res = list("serde_derive", "1.0.106").join("\n");
+    let res = list("serde_derive", "1.0").join("\n");
 
     assert_eq_text!(
         &res,
diff --git a/crates/ra_proc_macro_srv/src/tests/utils.rs b/crates/ra_proc_macro_srv/src/tests/utils.rs
index 646a427c5..84348b5de 100644
--- a/crates/ra_proc_macro_srv/src/tests/utils.rs
+++ b/crates/ra_proc_macro_srv/src/tests/utils.rs
@@ -8,7 +8,7 @@ use std::str::FromStr;
 use test_utils::assert_eq_text;
 
 mod fixtures {
-    use cargo_metadata::{parse_messages, Message};
+    use cargo_metadata::Message;
     use std::process::Command;
 
     // Use current project metadata to get the proc-macro dylib path
@@ -19,7 +19,7 @@ mod fixtures {
             .unwrap()
             .stdout;
 
-        for message in parse_messages(command.as_slice()) {
+        for message in Message::parse_stream(command.as_slice()) {
             match message.unwrap() {
                 Message::CompilerArtifact(artifact) => {
                     if artifact.target.kind.contains(&"proc-macro".to_string()) {
diff --git a/crates/ra_project_model/Cargo.toml b/crates/ra_project_model/Cargo.toml
index a32a5daab..e4a60f4c0 100644
--- a/crates/ra_project_model/Cargo.toml
+++ b/crates/ra_project_model/Cargo.toml
@@ -11,7 +11,7 @@ doctest = false
 log = "0.4.8"
 rustc-hash = "1.1.0"
 
-cargo_metadata = "0.9.1"
+cargo_metadata = "0.10.0"
 
 ra_arena = { path = "../ra_arena" }
 ra_cfg = { path = "../ra_cfg" }
diff --git a/crates/ra_project_model/src/cargo_workspace.rs b/crates/ra_project_model/src/cargo_workspace.rs
index 082af4f96..a306ce95f 100644
--- a/crates/ra_project_model/src/cargo_workspace.rs
+++ b/crates/ra_project_model/src/cargo_workspace.rs
@@ -161,7 +161,7 @@ impl CargoWorkspace {
             meta.current_dir(parent);
         }
         if let Some(target) = cargo_features.target.as_ref() {
-            meta.other_options(&[String::from("--filter-platform"), target.clone()]);
+            meta.other_options(vec![String::from("--filter-platform"), target.clone()]);
         }
         let meta = meta.exec().with_context(|| {
             format!("Failed to run `cargo metadata --manifest-path {}`", cargo_toml.display())
@@ -304,19 +304,13 @@ pub fn load_extern_resources(
 
     let mut res = ExternResources::default();
 
-    for message in cargo_metadata::parse_messages(output.stdout.as_slice()) {
+    for message in cargo_metadata::Message::parse_stream(output.stdout.as_slice()) {
         if let Ok(message) = message {
             match message {
                 Message::BuildScriptExecuted(BuildScript { package_id, out_dir, cfgs, .. }) => {
                     res.out_dirs.insert(package_id.clone(), out_dir);
-                    res.cfgs.insert(
-                        package_id,
-                        // FIXME: Current `cargo_metadata` uses `PathBuf` instead of `String`,
-                        // change when https://github.com/oli-obk/cargo_metadata/pulls/112 reaches crates.io
-                        cfgs.iter().filter_map(|c| c.to_str().map(|s| s.to_owned())).collect(),
-                    );
+                    res.cfgs.insert(package_id, cfgs);
                 }
-
                 Message::CompilerArtifact(message) => {
                     if message.target.kind.contains(&"proc-macro".to_string()) {
                         let package_id = message.package_id;
@@ -329,6 +323,8 @@ pub fn load_extern_resources(
                 }
                 Message::CompilerMessage(_) => (),
                 Message::Unknown => (),
+                Message::BuildFinished(_) => {}
+                Message::TextLine(_) => {}
             }
         }
     }