1 //! Routines the parser uses to classify AST nodes
3 // Predicates on exprs and stmts that the pretty-printer and parser use
7 /// Does this expression require a semicolon to be treated
8 /// as a statement? The negation of this: 'can this expression
9 /// be used as a statement without a semicolon' -- is used
10 /// as an early-bail-out in the parser so that, for instance,
11 /// if true {...} else {...}
13 /// isn't parsed as (if true {...} else {...} | x) | 5
14 pub fn expr_requires_semi_to_be_stmt(e: &ast::Expr) -> bool {
16 ast::ExprKind::If(..) |
17 ast::ExprKind::Match(..) |
18 ast::ExprKind::Block(..) |
19 ast::ExprKind::While(..) |
20 ast::ExprKind::Loop(..) |
21 ast::ExprKind::ForLoop(..) |
22 ast::ExprKind::TryBlock(..) => false,