diff options
| -rw-r--r-- | crates/ide-completion/src/completions/postfix.rs | 99 |
1 files changed, 77 insertions, 22 deletions
diff --git a/crates/ide-completion/src/completions/postfix.rs b/crates/ide-completion/src/completions/postfix.rs index b9bd47f7da5..3669f462a99 100644 --- a/crates/ide-completion/src/completions/postfix.rs +++ b/crates/ide-completion/src/completions/postfix.rs @@ -5,7 +5,7 @@ mod format_like; use hir::{Documentation, HasAttrs}; use ide_db::{imports::insert_use::ImportScope, ty_filter::TryEnum, SnippetCap}; use syntax::{ - ast::{self, AstNode, AstToken}, + ast::{self, make, AstNode, AstToken}, SyntaxKind::{EXPR_STMT, STMT_LIST}, TextRange, TextSize, }; @@ -129,8 +129,10 @@ pub(crate) fn complete_postfix( // The rest of the postfix completions create an expression that moves an argument, // so it's better to consider references now to avoid breaking the compilation - let dot_receiver = include_references(dot_receiver); - let receiver_text = get_receiver_text(&dot_receiver, receiver_is_ambiguous_float_literal); + + let (dot_receiver, node_to_replace_with) = include_references(dot_receiver); + let receiver_text = + get_receiver_text(&node_to_replace_with, receiver_is_ambiguous_float_literal); let postfix_snippet = match build_postfix_snippet_builder(ctx, cap, &dot_receiver) { Some(it) => it, None => return, @@ -210,14 +212,35 @@ fn get_receiver_text(receiver: &ast::Expr, receiver_is_ambiguous_float_literal: text.replace('\\', "\\\\").replace('$', "\\$") } -fn include_references(initial_element: &ast::Expr) -> ast::Expr { +fn include_references(initial_element: &ast::Expr) -> (ast::Expr, ast::Expr) { let mut resulting_element = initial_element.clone(); - while let Some(parent_ref_element) = - resulting_element.syntax().parent().and_then(ast::RefExpr::cast) + + while let Some(field_expr) = resulting_element.syntax().parent().and_then(ast::FieldExpr::cast) { - resulting_element = ast::Expr::from(parent_ref_element); + resulting_element = ast::Expr::from(field_expr); } - resulting_element + + let mut new_element_opt = initial_element.clone(); + + if let Some(first_ref_expr) = resulting_element.syntax().parent().and_then(ast::RefExpr::cast) { + if let Some(expr) = first_ref_expr.expr() { + resulting_element = expr.clone(); + } + + while let Some(parent_ref_element) = + resulting_element.syntax().parent().and_then(ast::RefExpr::cast) + { + resulting_element = ast::Expr::from(parent_ref_element); + + new_element_opt = make::expr_ref(new_element_opt, false); + } + } else { + // If we do not find any ref expressions, restore + // all the progress of tree climbing + resulting_element = initial_element.clone(); + } + + (resulting_element, new_element_opt) } fn build_postfix_snippet_builder<'ctx>( @@ -225,8 +248,7 @@ fn build_postfix_snippet_builder<'ctx>( cap: SnippetCap, receiver: &'ctx ast::Expr, ) -> Option<impl Fn(&str, &str, &str) -> Builder + 'ctx> { - let receiver_syntax = receiver.syntax(); - let receiver_range = ctx.sema.original_range_opt(receiver_syntax)?.range; + let receiver_range = ctx.sema.original_range_opt(receiver.syntax())?.range; if ctx.source_range().end() < receiver_range.start() { // This shouldn't happen, yet it does. I assume this might be due to an incorrect token mapping. return None; @@ -616,22 +638,55 @@ fn main() { #[test] fn postfix_custom_snippets_completion_for_references() { + // https://github.com/rust-lang/rust-analyzer/issues/7929 + + let snippet = Snippet::new( + &[], + &["ok".into()], + &["Ok(${receiver})".into()], + "", + &[], + crate::SnippetScope::Expr, + ) + .unwrap(); + check_edit_with_config( - CompletionConfig { - snippets: vec![Snippet::new( - &[], - &["ok".into()], - &["Ok(${receiver})".into()], - "", - &[], - crate::SnippetScope::Expr, - ) - .unwrap()], - ..TEST_CONFIG - }, + CompletionConfig { snippets: vec![snippet.clone()], ..TEST_CONFIG }, + "ok", + r#"fn main() { &&42.o$0 }"#, + r#"fn main() { Ok(&&42) }"#, + ); + + check_edit_with_config( + CompletionConfig { snippets: vec![snippet.clone()], ..TEST_CONFIG }, "ok", r#"fn main() { &&42.$0 }"#, r#"fn main() { Ok(&&42) }"#, ); + + check_edit_with_config( + CompletionConfig { snippets: vec![snippet], ..TEST_CONFIG }, + "ok", + r#" +struct A { + a: i32, +} + +fn main() { + let a = A {a :1}; + &a.a.$0 +} + "#, + r#" +struct A { + a: i32, +} + +fn main() { + let a = A {a :1}; + Ok(&a.a) +} + "#, + ); } } |