fix: use functional programming

[rust.git] / crates / ide-assists / src / handlers / inline_call.rs

diff --git a/crates/ide-assists/src/handlers/inline_call.rs b/crates/ide-assists/src/handlers/inline_call.rs
index c857adf876ef1010aa1d09506dd2e386b843d4c4..b5d092e39b02972b24da8cdfaedf9432e8e42691 100644 (file)
--- a/crates/ide-assists/src/handlers/inline_call.rs
+++ b/crates/ide-assists/src/handlers/inline_call.rs
@@ -7,13 +7,13 @@
     imports::insert_use::remove_path_if_in_use_stmt,
     path_transform::PathTransform,
     search::{FileReference, SearchScope},
-    syntax_helpers::node_ext::expr_as_name_ref,
+    syntax_helpers::{insert_whitespace_into_node::insert_ws_into, node_ext::expr_as_name_ref},
     RootDatabase,
 };
 use itertools::{izip, Itertools};
 use syntax::{
     ast::{self, edit_in_place::Indent, HasArgList, PathExpr},
-    ted, AstNode,
+    ted, AstNode, NodeOrToken, SyntaxKind,
 };
 
 use crate::{
@@ -59,7 +59,7 @@
 //     };
 // }
 // ```
-pub(crate) fn inline_into_callers(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
+pub(crate) fn inline_into_callers(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<()> {
     let def_file = ctx.file_id();
     let name = ctx.find_node_at_offset::<ast::Name>()?;
     let ast_func = name.syntax().parent().and_then(ast::Fn::cast)?;
@@ -174,7 +174,7 @@ pub(crate) fn inline_into_callers(acc: &mut Assists, ctx: &AssistContext) -> Opt
 //         };
 // }
 // ```
-pub(crate) fn inline_call(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
+pub(crate) fn inline_call(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<()> {
     let name_ref: ast::NameRef = ctx.find_node_at_offset()?;
     let call_info = CallInfo::from_name_ref(name_ref.clone())?;
     let (function, label) = match &call_info.node {
@@ -294,14 +294,30 @@ fn get_fn_params(
 }
 
 fn inline(
-    sema: &Semantics<RootDatabase>,
+    sema: &Semantics<'_, RootDatabase>,
     function_def_file_id: FileId,
     function: hir::Function,
     fn_body: &ast::BlockExpr,
     params: &[(ast::Pat, Option<ast::Type>, hir::Param)],
     CallInfo { node, arguments, generic_arg_list }: &CallInfo,
 ) -> ast::Expr {
-    let body = fn_body.clone_for_update();
+    let body = if sema.hir_file_for(fn_body.syntax()).is_macro() {
+        cov_mark::hit!(inline_call_defined_in_macro);
+        if let Some(body) = ast::BlockExpr::cast(insert_ws_into(fn_body.syntax().clone())) {
+            body
+        } else {
+            fn_body.clone_for_update()
+        }
+    } else {
+        fn_body.clone_for_update()
+    };
+    if let Some(t) = body.syntax().ancestors().find_map(ast::Impl::cast).and_then(|i| i.self_ty()) {
+        body.syntax()
+            .descendants_with_tokens()
+            .filter_map(NodeOrToken::into_token)
+            .filter(|tok| tok.kind() == SyntaxKind::SELF_TYPE_KW)
+            .for_each(|tok| ted::replace(tok, t.syntax()));
+    }
     let usages_for_locals = |local| {
         Definition::Local(local)
             .usages(sema)
@@ -336,6 +352,7 @@ fn inline(
             }
         })
         .collect();
+
     if function.self_param(sema.db).is_some() {
         let this = || make::name_ref("this").syntax().clone_for_update();
         if let Some(self_local) = params[0].2.as_local(sema.db) {
@@ -1144,6 +1161,66 @@ fn bar() -> u32 {
         x
     }) + foo()
 }
+"#,
+        )
+    }
+
+    #[test]
+    fn inline_call_defined_in_macro() {
+        cov_mark::check!(inline_call_defined_in_macro);
+        check_assist(
+            inline_call,
+            r#"
+macro_rules! define_foo {
+    () => { fn foo() -> u32 {
+        let x = 0;
+        x
+    } };
+}
+define_foo!();
+fn bar() -> u32 {
+    foo$0()
+}
+"#,
+            r#"
+macro_rules! define_foo {
+    () => { fn foo() -> u32 {
+        let x = 0;
+        x
+    } };
+}
+define_foo!();
+fn bar() -> u32 {
+    {
+      let x = 0;
+      x
+    }
+}
+"#,
+        )
+    }
+
+    #[test]
+    fn inline_call_with_self_type() {
+        check_assist(
+            inline_call,
+            r#"
+struct A(u32);
+impl A {
+    fn f() -> Self { Self(114514) }
+}
+fn main() {
+    A::f$0();
+}
+"#,
+            r#"
+struct A(u32);
+impl A {
+    fn f() -> Self { Self(114514) }
+}
+fn main() {
+    A(114514);
+}
 "#,
         )
     }