mikros/rust
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Properly preserve macro braces

Browse Source
This commit is contained in:
Kirill Bulatov 2020-09-11 22:16:22 +03:00
parent fab7543290
commit 779ea2ea0a
1 changed files with 16 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
crates/assists/src/handlers/remove_dbg.rs
View File

@ -43,15 +43,18 @@ pub(crate) fn remove_dbg(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
fn adjusted_macro_contents(macro_call: &ast::MacroCall) -> Option<String> {
let contents = get_valid_macrocall_contents(&macro_call, "dbg")?;
let is_leaf = macro_call.syntax().next_sibling().is_none();
let macro_text_with_brackets = macro_call.token_tree()?.syntax().text();
let slice_index = if is_leaf || !needs_parentheses_around_macro_contents(contents) {
TextRange::new(TextSize::of('('), macro_text_with_brackets.len() - TextSize::of(')'))
let macro_text_in_brackets = macro_text_with_brackets.slice(TextRange::new(
TextSize::of('('),
macro_text_with_brackets.len() - TextSize::of(')'),
));
let is_leaf = macro_call.syntax().next_sibling().is_none();
Some(if !is_leaf && needs_parentheses_around_macro_contents(contents) {
format!("({})", macro_text_in_brackets)
} else {
// leave parenthesis around macro contents to preserve the semantics
TextRange::up_to(macro_text_with_brackets.len())
};
Some(macro_text_with_brackets.slice(slice_index).to_string())
macro_text_in_brackets.to_string()
})
}
/// Verifies that the given macro_call actually matches the given name
@ -90,19 +93,10 @@ fn needs_parentheses_around_macro_contents(macro_contents: Vec<SyntaxElement>) -
if macro_contents.len() < 2 {
return false;
}
let mut macro_contents_kind_not_in_brackets = Vec::with_capacity(macro_contents.len());
let mut first_bracket_in_macro = None;
let mut unpaired_brackets_in_contents = Vec::new();
for element in macro_contents {
match element.kind() {
T!['('] | T!['['] | T!['{'] => {
if let None = first_bracket_in_macro {
first_bracket_in_macro = Some(element.clone())
}
unpaired_brackets_in_contents.push(element);
}
T!['('] | T!['['] | T!['{'] => unpaired_brackets_in_contents.push(element),
T![')'] => {
if !matches!(unpaired_brackets_in_contents.pop(), Some(correct_bracket) if correct_bracket.kind() == T!['('])
{
@ -121,19 +115,15 @@ fn needs_parentheses_around_macro_contents(macro_contents: Vec<SyntaxElement>) -
return true;
}
}
other_kind => {
if unpaired_brackets_in_contents.is_empty() {
macro_contents_kind_not_in_brackets.push(other_kind);
symbol_kind => {
let symbol_not_in_bracket = unpaired_brackets_in_contents.is_empty();
if symbol_not_in_bracket && symbol_kind.is_punct() {
return true;
}
}
}
}
!unpaired_brackets_in_contents.is_empty()
|| matches!(first_bracket_in_macro, Some(bracket) if bracket.kind() != T!['('])
|| macro_contents_kind_not_in_brackets
.into_iter()
.any(|macro_contents_kind| macro_contents_kind.is_punct())
}
#[cfg(test)]
@ -244,6 +234,7 @@ fn main() {
);
check_assist(remove_dbg, r#"let res = <|>dbg!(2 + 2) * 5"#, r#"let res = (2 + 2) * 5"#);
check_assist(remove_dbg, r#"let res = <|>dbg![2 + 2] * 5"#, r#"let res = (2 + 2) * 5"#);
}
#[test]