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-rw-r--r--crates/assists/src/handlers/remove_unused_param.rs81
1 files changed, 74 insertions, 7 deletions
diff --git a/crates/assists/src/handlers/remove_unused_param.rs b/crates/assists/src/handlers/remove_unused_param.rs
index 1ff5e92b0..f72dd49ed 100644
--- a/crates/assists/src/handlers/remove_unused_param.rs
+++ b/crates/assists/src/handlers/remove_unused_param.rs
@@ -2,9 +2,10 @@ use ide_db::{defs::Definition, search::Reference};
2use syntax::{ 2use syntax::{
3 algo::find_node_at_range, 3 algo::find_node_at_range,
4 ast::{self, ArgListOwner}, 4 ast::{self, ArgListOwner},
5 AstNode, SyntaxNode, TextRange, T, 5 AstNode, SyntaxKind, SyntaxNode, TextRange, T,
6}; 6};
7use test_utils::mark; 7use test_utils::mark;
8use SyntaxKind::WHITESPACE;
8 9
9use crate::{ 10use crate::{
10 assist_context::AssistBuilder, utils::next_prev, AssistContext, AssistId, AssistKind, Assists, 11 assist_context::AssistBuilder, utils::next_prev, AssistContext, AssistId, AssistKind, Assists,
@@ -56,7 +57,7 @@ pub(crate) fn remove_unused_param(acc: &mut Assists, ctx: &AssistContext) -> Opt
56 "Remove unused parameter", 57 "Remove unused parameter",
57 param.syntax().text_range(), 58 param.syntax().text_range(),
58 |builder| { 59 |builder| {
59 builder.delete(range_with_coma(param.syntax())); 60 builder.delete(range_to_remove(param.syntax()));
60 for usage in fn_def.usages(&ctx.sema).all() { 61 for usage in fn_def.usages(&ctx.sema).all() {
61 process_usage(ctx, builder, usage, param_position); 62 process_usage(ctx, builder, usage, param_position);
62 } 63 }
@@ -80,19 +81,34 @@ fn process_usage(
80 let arg = call_expr.arg_list()?.args().nth(arg_to_remove)?; 81 let arg = call_expr.arg_list()?.args().nth(arg_to_remove)?;
81 82
82 builder.edit_file(usage.file_range.file_id); 83 builder.edit_file(usage.file_range.file_id);
83 builder.delete(range_with_coma(arg.syntax())); 84 builder.delete(range_to_remove(arg.syntax()));
84 85
85 Some(()) 86 Some(())
86} 87}
87 88
88fn range_with_coma(node: &SyntaxNode) -> TextRange { 89fn range_to_remove(node: &SyntaxNode) -> TextRange {
89 let up_to = next_prev().find_map(|dir| { 90 let up_to_comma = next_prev().find_map(|dir| {
90 node.siblings_with_tokens(dir) 91 node.siblings_with_tokens(dir)
91 .filter_map(|it| it.into_token()) 92 .filter_map(|it| it.into_token())
92 .find(|it| it.kind() == T![,]) 93 .find(|it| it.kind() == T![,])
94 .map(|it| (dir, it))
93 }); 95 });
94 let up_to = up_to.map_or(node.text_range(), |it| it.text_range()); 96 if let Some((dir, token)) = up_to_comma {
95 node.text_range().cover(up_to) 97 if node.next_sibling().is_some() {
98 let up_to_space = token
99 .siblings_with_tokens(dir)
100 .skip(1)
101 .take_while(|it| it.kind() == WHITESPACE)
102 .last()
103 .and_then(|it| it.into_token());
104 return node
105 .text_range()
106 .cover(up_to_space.map_or(token.text_range(), |it| it.text_range()));
107 }
108 node.text_range().cover(token.text_range())
109 } else {
110 node.text_range()
111 }
96} 112}
97 113
98#[cfg(test)] 114#[cfg(test)]
@@ -119,6 +135,57 @@ fn b() { foo(9, ) }
119 } 135 }
120 136
121 #[test] 137 #[test]
138 fn remove_unused_first_param() {
139 check_assist(
140 remove_unused_param,
141 r#"
142fn foo(<|>x: i32, y: i32) { y; }
143fn a() { foo(1, 2) }
144fn b() { foo(1, 2,) }
145"#,
146 r#"
147fn foo(y: i32) { y; }
148fn a() { foo(2) }
149fn b() { foo(2,) }
150"#,
151 );
152 }
153
154 #[test]
155 fn remove_unused_single_param() {
156 check_assist(
157 remove_unused_param,
158 r#"
159fn foo(<|>x: i32) { 0; }
160fn a() { foo(1) }
161fn b() { foo(1, ) }
162"#,
163 r#"
164fn foo() { 0; }
165fn a() { foo() }
166fn b() { foo( ) }
167"#,
168 );
169 }
170
171 #[test]
172 fn remove_unused_surrounded_by_parms() {
173 check_assist(
174 remove_unused_param,
175 r#"
176fn foo(x: i32, <|>y: i32, z: i32) { x; }
177fn a() { foo(1, 2, 3) }
178fn b() { foo(1, 2, 3,) }
179"#,
180 r#"
181fn foo(x: i32, z: i32) { x; }
182fn a() { foo(1, 3) }
183fn b() { foo(1, 3,) }
184"#,
185 );
186 }
187
188 #[test]
122 fn remove_unused_qualified_call() { 189 fn remove_unused_qualified_call() {
123 check_assist( 190 check_assist(
124 remove_unused_param, 191 remove_unused_param,