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Return early, return often

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This commit is contained in:
Aleksey Kladov 2020-02-11 18:36:12 +01:00
parent adfed5c689
commit f3dd0a05bb
1 changed files with 34 additions and 28 deletions
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62
crates/ra_ide/src/join_lines.rs
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@ -66,7 +66,9 @@ fn remove_newline(edit: &mut TextEditBuilder, token: &SyntaxToken, offset: TextU
if is_trailing_comma(prev.kind(), next.kind()) {
// Removes: trailing comma, newline (incl. surrounding whitespace)
edit.delete(TextRange::from_to(prev.text_range().start(), token.text_range().end()));
} else if prev.kind() == T![,] && next.kind() == T!['}'] {
return;
}
if prev.kind() == T![,] && next.kind() == T!['}'] {
// Removes: comma, newline (incl. surrounding whitespace)
let space = if let Some(left) = prev.prev_sibling_or_token() {
compute_ws(left.kind(), next.kind())
@ -77,7 +79,10 @@ fn remove_newline(edit: &mut TextEditBuilder, token: &SyntaxToken, offset: TextU
TextRange::from_to(prev.text_range().start(), token.text_range().end()),
space.to_string(),
);
} else if let (Some(_), Some(next)) = (
return;
}
if let (Some(_), Some(next)) = (
prev.as_token().cloned().and_then(ast::Comment::cast),
next.as_token().cloned().and_then(ast::Comment::cast),
) {
@ -86,33 +91,34 @@ fn remove_newline(edit: &mut TextEditBuilder, token: &SyntaxToken, offset: TextU
token.text_range().start(),
next.syntax().text_range().start() + TextUnit::of_str(next.prefix()),
));
} else {
// Special case that turns something like:
//
// ```
// my_function({<|>
// <some-expr>
// })
// ```
//
// into `my_function(<some-expr>)`
if join_single_expr_block(edit, token).is_some() {
return;
}
// ditto for
//
// ```
// use foo::{<|>
// bar
// };
// ```
if join_single_use_tree(edit, token).is_some() {
return;
}
// Remove newline but add a computed amount of whitespace characters
edit.replace(token.text_range(), compute_ws(prev.kind(), next.kind()).to_string());
return;
}
// Special case that turns something like:
//
// ```
// my_function({<|>
// <some-expr>
// })
// ```
//
// into `my_function(<some-expr>)`
if join_single_expr_block(edit, token).is_some() {
return;
}
// ditto for
//
// ```
// use foo::{<|>
// bar
// };
// ```
if join_single_use_tree(edit, token).is_some() {
return;
}
// Remove newline but add a computed amount of whitespace characters
edit.replace(token.text_range(), compute_ws(prev.kind(), next.kind()).to_string());
}
fn has_comma_after(node: &SyntaxNode) -> bool {