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Support let...else

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This commit is contained in:
Jonas Schievink 2021-10-07 17:05:50 +02:00
parent 4675410f07
commit f8acae7895
13 changed files with 162 additions and 8 deletions
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26
crates/syntax/src/ast/generated/nodes.rs
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@ -722,9 +722,19 @@ impl LetStmt {
pub fn ty(&self) -> Option<Type> { support::child(&self.syntax) }
pub fn eq_token(&self) -> Option<SyntaxToken> { support::token(&self.syntax, T![=]) }
pub fn initializer(&self) -> Option<Expr> { support::child(&self.syntax) }
pub fn let_else(&self) -> Option<LetElse> { support::child(&self.syntax) }
pub fn semicolon_token(&self) -> Option<SyntaxToken> { support::token(&self.syntax, T![;]) }
}
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub struct LetElse {
pub(crate) syntax: SyntaxNode,
}
impl LetElse {
pub fn else_token(&self) -> Option<SyntaxToken> { support::token(&self.syntax, T![else]) }
pub fn block_expr(&self) -> Option<BlockExpr> { support::child(&self.syntax) }
}
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub struct ArrayExpr {
pub(crate) syntax: SyntaxNode,
@ -2304,6 +2314,17 @@ impl AstNode for LetStmt {
}
fn syntax(&self) -> &SyntaxNode { &self.syntax }
}
impl AstNode for LetElse {
fn can_cast(kind: SyntaxKind) -> bool { kind == LET_ELSE }
fn cast(syntax: SyntaxNode) -> Option<Self> {
if Self::can_cast(syntax.kind()) {
Some(Self { syntax })
} else {
None
}
}
fn syntax(&self) -> &SyntaxNode { &self.syntax }
}
impl AstNode for ArrayExpr {
fn can_cast(kind: SyntaxKind) -> bool { kind == ARRAY_EXPR }
fn cast(syntax: SyntaxNode) -> Option<Self> {
@ -4320,6 +4341,11 @@ impl std::fmt::Display for LetStmt {
std::fmt::Display::fmt(self.syntax(), f)
}
}
impl std::fmt::Display for LetElse {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
std::fmt::Display::fmt(self.syntax(), f)
}
}
impl std::fmt::Display for ArrayExpr {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
std::fmt::Display::fmt(self.syntax(), f)