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internal: use mutable syntax trees when filling fields

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This commit is contained in:
Aleksey Kladov 2021-05-16 18:10:56 +03:00
parent 9df0a23368
commit 1859df37fd
4 changed files with 49 additions and 104 deletions
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40
crates/syntax/src/ast/edit_in_place.rs
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@ -368,6 +368,46 @@ impl ast::MatchArmList {
}
}
impl ast::RecordExprFieldList {
pub fn add_field(&self, field: ast::RecordExprField) {
let is_multiline = self.syntax().text().contains_char('\n');
let whitespace = if is_multiline {
let indent = IndentLevel::from_node(self.syntax()) + 1;
make::tokens::whitespace(&format!("\n{}", indent))
} else {
make::tokens::single_space()
};
let position = match self.fields().last() {
Some(last_field) => {
let comma = match last_field
.syntax()
.siblings_with_tokens(Direction::Next)
.filter_map(|it| it.into_token())
.find(|it| it.kind() == T![,])
{
Some(it) => it,
None => {
let comma = ast::make::token(T![,]);
ted::insert(Position::after(last_field.syntax()), &comma);
comma
}
};
Position::after(comma)
}
None => match self.l_curly_token() {
Some(it) => Position::after(it),
None => Position::last_child_of(self.syntax()),
},
};
ted::insert_all(position, vec![whitespace.into(), field.syntax().clone().into()]);
if is_multiline {
ted::insert(Position::after(field.syntax()), ast::make::token(T![,]));
}
}
}
fn normalize_ws_between_braces(node: &SyntaxNode) -> Option<()> {
let l = node
.children_with_tokens()