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-rw-r--r--crates/ide/src/typing.rs150
1 files changed, 131 insertions, 19 deletions
diff --git a/crates/ide/src/typing.rs b/crates/ide/src/typing.rs
index 82c732390..4ad49eca0 100644
--- a/crates/ide/src/typing.rs
+++ b/crates/ide/src/typing.rs
@@ -88,7 +88,7 @@ fn on_char_typed_inner(
88} 88}
89 89
90/// Inserts a closing `}` when the user types an opening `{`, wrapping an existing expression in a 90/// Inserts a closing `}` when the user types an opening `{`, wrapping an existing expression in a
91/// block. 91/// block, or a part of a `use` item.
92fn on_opening_brace_typed(file: &Parse<SourceFile>, offset: TextSize) -> Option<TextEdit> { 92fn on_opening_brace_typed(file: &Parse<SourceFile>, offset: TextSize) -> Option<TextEdit> {
93 if !stdx::always!(file.tree().syntax().text().char_at(offset) == Some('{')) { 93 if !stdx::always!(file.tree().syntax().text().char_at(offset) == Some('{')) {
94 return None; 94 return None;
@@ -99,30 +99,59 @@ fn on_opening_brace_typed(file: &Parse<SourceFile>, offset: TextSize) -> Option<
99 // Remove the `{` to get a better parse tree, and reparse 99 // Remove the `{` to get a better parse tree, and reparse
100 let file = file.reparse(&Indel::delete(brace_token.text_range())); 100 let file = file.reparse(&Indel::delete(brace_token.text_range()));
101 101
102 let mut expr: ast::Expr = find_node_at_offset(file.tree().syntax(), offset)?; 102 if let Some(edit) = brace_expr(&file.tree(), offset) {
103 if expr.syntax().text_range().start() != offset { 103 return Some(edit);
104 return None;
105 } 104 }
106 105
107 // Enclose the outermost expression starting at `offset` 106 if let Some(edit) = brace_use_path(&file.tree(), offset) {
108 while let Some(parent) = expr.syntax().parent() { 107 return Some(edit);
109 if parent.text_range().start() != expr.syntax().text_range().start() { 108 }
110 break;
111 }
112 109
113 match ast::Expr::cast(parent) { 110 return None;
114 Some(parent) => expr = parent, 111
115 None => break, 112 fn brace_use_path(file: &SourceFile, offset: TextSize) -> Option<TextEdit> {
113 let segment: ast::PathSegment = find_node_at_offset(file.syntax(), offset)?;
114 if segment.syntax().text_range().start() != offset {
115 return None;
116 } 116 }
117 }
118 117
119 // If it's a statement in a block, we don't know how many statements should be included 118 let tree: ast::UseTree = find_node_at_offset(file.syntax(), offset)?;
120 if ast::ExprStmt::can_cast(expr.syntax().parent()?.kind()) { 119
121 return None; 120 Some(TextEdit::insert(
121 tree.syntax().text_range().end() + TextSize::of("{"),
122 "}".to_string(),
123 ))
122 } 124 }
123 125
124 // Insert `}` right after the expression. 126 fn brace_expr(file: &SourceFile, offset: TextSize) -> Option<TextEdit> {
125 Some(TextEdit::insert(expr.syntax().text_range().end() + TextSize::of("{"), "}".to_string())) 127 let mut expr: ast::Expr = find_node_at_offset(file.syntax(), offset)?;
128 if expr.syntax().text_range().start() != offset {
129 return None;
130 }
131
132 // Enclose the outermost expression starting at `offset`
133 while let Some(parent) = expr.syntax().parent() {
134 if parent.text_range().start() != expr.syntax().text_range().start() {
135 break;
136 }
137
138 match ast::Expr::cast(parent) {
139 Some(parent) => expr = parent,
140 None => break,
141 }
142 }
143
144 // If it's a statement in a block, we don't know how many statements should be included
145 if ast::ExprStmt::can_cast(expr.syntax().parent()?.kind()) {
146 return None;
147 }
148
149 // Insert `}` right after the expression.
150 Some(TextEdit::insert(
151 expr.syntax().text_range().end() + TextSize::of("{"),
152 "}".to_string(),
153 ))
154 }
126} 155}
127 156
128/// Returns an edit which should be applied after `=` was typed. Primarily, 157/// Returns an edit which should be applied after `=` was typed. Primarily,
@@ -440,7 +469,7 @@ fn foo() -> { 92 }
440 } 469 }
441 470
442 #[test] 471 #[test]
443 fn adds_closing_brace() { 472 fn adds_closing_brace_for_expr() {
444 type_char( 473 type_char(
445 '{', 474 '{',
446 r#" 475 r#"
@@ -519,4 +548,87 @@ fn f() {
519 "#, 548 "#,
520 ); 549 );
521 } 550 }
551
552 #[test]
553 fn adds_closing_brace_for_use_tree() {
554 type_char(
555 '{',
556 r#"
557use some::$0Path;
558 "#,
559 r#"
560use some::{Path};
561 "#,
562 );
563 type_char(
564 '{',
565 r#"
566use some::{Path, $0Other};
567 "#,
568 r#"
569use some::{Path, {Other}};
570 "#,
571 );
572 type_char(
573 '{',
574 r#"
575use some::{$0Path, Other};
576 "#,
577 r#"
578use some::{{Path}, Other};
579 "#,
580 );
581 type_char(
582 '{',
583 r#"
584use some::path::$0to::Item;
585 "#,
586 r#"
587use some::path::{to::Item};
588 "#,
589 );
590 type_char(
591 '{',
592 r#"
593use some::$0path::to::Item;
594 "#,
595 r#"
596use some::{path::to::Item};
597 "#,
598 );
599 type_char(
600 '{',
601 r#"
602use $0some::path::to::Item;
603 "#,
604 r#"
605use {some::path::to::Item};
606 "#,
607 );
608 type_char(
609 '{',
610 r#"
611use some::path::$0to::{Item};
612 "#,
613 r#"
614use some::path::{to::{Item}};
615 "#,
616 );
617 type_char(
618 '{',
619 r#"
620use $0Thing as _;
621 "#,
622 r#"
623use {Thing as _};
624 "#,
625 );
626
627 type_char_noop(
628 '{',
629 r#"
630use some::pa$0th::to::Item;
631 "#,
632 );
633 }
522} 634}