Unnamed repository; edit this file 'description' to name the repository.
| -rw-r--r-- | crates/ide-completion/src/lib.rs | 22 | ||||
| -rw-r--r-- | crates/ide-completion/src/tests/special.rs | 109 |
2 files changed, 131 insertions, 0 deletions
diff --git a/crates/ide-completion/src/lib.rs b/crates/ide-completion/src/lib.rs index 2eaa42040a..2fad293d16 100644 --- a/crates/ide-completion/src/lib.rs +++ b/crates/ide-completion/src/lib.rs @@ -169,6 +169,28 @@ pub fn completions( return Some(completions.into()); } + // when the user types a bare `_` (that is it does not belong to an identifier) + // the user might just wanted to type a `_` for type inference or pattern discarding + // so try to suppress completions in those cases + if trigger_character == Some('_') && ctx.original_token.kind() == syntax::SyntaxKind::UNDERSCORE + { + if let CompletionAnalysis::NameRef(NameRefContext { + kind: + NameRefKind::Path( + path_ctx @ PathCompletionCtx { + kind: PathKind::Type { .. } | PathKind::Pat { .. }, + .. + }, + ), + .. + }) = analysis + { + if path_ctx.is_trivial_path() { + return None; + } + } + } + { let acc = &mut completions; diff --git a/crates/ide-completion/src/tests/special.rs b/crates/ide-completion/src/tests/special.rs index 83888e08f1..d3dbd7cc22 100644 --- a/crates/ide-completion/src/tests/special.rs +++ b/crates/ide-completion/src/tests/special.rs @@ -1372,3 +1372,112 @@ fn main() { expect!("pub const fn baz<'foo>(&'foo mut self, x: &'foo Foo) -> !"), ); } + +#[test] +fn skips_underscore() { + check_with_trigger_character( + r#" +fn foo(_$0) { } +"#, + Some('_'), + expect![[r#""#]], + ); + check_with_trigger_character( + r#" +fn foo(_: _$0) { } +"#, + Some('_'), + expect![[r#""#]], + ); + check_with_trigger_character( + r#" +fn foo<T>() { + foo::<_$0>(); +} +"#, + Some('_'), + expect![[r#""#]], + ); + // underscore expressions are fine, they are invalid so the user definitely meant to type an + // underscored name here + check_with_trigger_character( + r#" +fn foo() { + _$0 +} +"#, + Some('_'), + expect![[r#" + fn foo() fn() + bt u32 + kw const + kw crate:: + kw enum + kw extern + kw false + kw fn + kw for + kw if + kw if let + kw impl + kw let + kw loop + kw match + kw mod + kw return + kw self:: + kw static + kw struct + kw trait + kw true + kw type + kw union + kw unsafe + kw use + kw while + kw while let + sn macro_rules + sn pd + sn ppd + "#]], + ); +} + +#[test] +fn no_skip_underscore_ident() { + check_with_trigger_character( + r#" +fn foo(a_$0) { } +"#, + Some('_'), + expect![[r#" + kw mut + kw ref + "#]], + ); + check_with_trigger_character( + r#" +fn foo(_: a_$0) { } +"#, + Some('_'), + expect![[r#" + bt u32 + kw crate:: + kw self:: + "#]], + ); + check_with_trigger_character( + r#" +fn foo<T>() { + foo::<a_$0>(); +} +"#, + Some('_'), + expect![[r#" + tp T + bt u32 + kw crate:: + kw self:: + "#]], + ); +} |