hir::ExprRet(..) |
hir::ExprYield(..) => PREC_JUMP,
- hir::ExprIf(..) |
- hir::ExprWhile(..) |
- hir::ExprLoop(..) |
- hir::ExprMatch(..) |
- hir::ExprBlock(..) => PREC_BLOCK,
-
// Binop-like expr kinds, handled by `AssocOp`.
hir::ExprBinary(op, _, _) => bin_op_to_assoc_op(op.node).precedence() as i8,
hir::ExprTup(..) |
hir::ExprLit(..) |
hir::ExprPath(..) |
+ hir::ExprIf(..) |
+ hir::ExprWhile(..) |
+ hir::ExprLoop(..) |
+ hir::ExprMatch(..) |
+ hir::ExprBlock(..) |
hir::ExprStruct(..) => PREC_PAREN,
}
}
pub const PREC_RESET: i8 = -100;
pub const PREC_CLOSURE: i8 = -40;
pub const PREC_JUMP: i8 = -30;
-pub const PREC_BLOCK: i8 = -20;
pub const PREC_RANGE: i8 = -10;
// The range 2 ... 14 is reserved for AssocOp binary operator precedences.
pub const PREC_PREFIX: i8 = 50;
ExprKind::Ret(..) |
ExprKind::Yield(..) => PREC_JUMP,
- ExprKind::If(..) |
- ExprKind::IfLet(..) |
- ExprKind::While(..) |
- ExprKind::WhileLet(..) |
- ExprKind::ForLoop(..) |
- ExprKind::Loop(..) |
- ExprKind::Match(..) |
- ExprKind::Block(..) |
- ExprKind::Catch(..) => PREC_BLOCK,
-
// `Range` claims to have higher precedence than `Assign`, but `x .. x = x` fails to parse,
// instead of parsing as `(x .. x) = x`. Giving `Range` a lower precedence ensures that
// `pprust` will add parentheses in the right places to get the desired parse.
ExprKind::Lit(..) |
ExprKind::Path(..) |
ExprKind::Paren(..) |
+ ExprKind::If(..) |
+ ExprKind::IfLet(..) |
+ ExprKind::While(..) |
+ ExprKind::WhileLet(..) |
+ ExprKind::ForLoop(..) |
+ ExprKind::Loop(..) |
+ ExprKind::Match(..) |
+ ExprKind::Block(..) |
+ ExprKind::Catch(..) |
ExprKind::Struct(..) => PREC_PAREN,
}
}