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Rollup merge of #138017 - nnethercote:tighten-assignment-op, r=spastorino

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Tighten up assignment operator representations.

This is step 3 of [MCP 831](https://github.com/rust-lang/compiler-team/issues/831).

r? `@spastorino`
This commit is contained in:
Matthias Krüger 2025-04-03 21:18:28 +02:00 • committed by GitHub
commit e5c7451a10
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29 changed files with 471 additions and 314 deletions
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14
compiler/rustc_parse/src/parser/expr.rs
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@ -14,10 +14,10 @@ use rustc_ast::util::classify;
use rustc_ast::util::parser::{AssocOp, ExprPrecedence, Fixity, prec_let_scrutinee_needs_par};
use rustc_ast::visit::{Visitor, walk_expr};
use rustc_ast::{
self as ast, AnonConst, Arm, AttrStyle, AttrVec, BinOp, BinOpKind, BlockCheckMode, CaptureBy,
ClosureBinder, DUMMY_NODE_ID, Expr, ExprField, ExprKind, FnDecl, FnRetTy, Label, MacCall,
MetaItemLit, Movability, Param, RangeLimits, StmtKind, Ty, TyKind, UnOp, UnsafeBinderCastKind,
YieldKind,
self as ast, AnonConst, Arm, AssignOp, AssignOpKind, AttrStyle, AttrVec, BinOp, BinOpKind,
BlockCheckMode, CaptureBy, ClosureBinder, DUMMY_NODE_ID, Expr, ExprField, ExprKind, FnDecl,
FnRetTy, Label, MacCall, MetaItemLit, Movability, Param, RangeLimits, StmtKind, Ty, TyKind,
UnOp, UnsafeBinderCastKind, YieldKind,
};
use rustc_data_structures::stack::ensure_sufficient_stack;
use rustc_errors::{Applicability, Diag, PResult, StashKey, Subdiagnostic};
@ -359,7 +359,7 @@ impl<'a> Parser<'a> {
(
Some(
AssocOp::Binary(BinOpKind::Shr | BinOpKind::Gt | BinOpKind::Ge)
| AssocOp::AssignOp(BinOpKind::Shr),
| AssocOp::AssignOp(AssignOpKind::ShrAssign),
),
_,
) if self.restrictions.contains(Restrictions::CONST_EXPR) => {
@ -3914,8 +3914,8 @@ impl<'a> Parser<'a> {
self.dcx().emit_err(errors::LeftArrowOperator { span });
}
fn mk_assign_op(&self, binop: BinOp, lhs: P<Expr>, rhs: P<Expr>) -> ExprKind {
ExprKind::AssignOp(binop, lhs, rhs)
fn mk_assign_op(&self, assign_op: AssignOp, lhs: P<Expr>, rhs: P<Expr>) -> ExprKind {
ExprKind::AssignOp(assign_op, lhs, rhs)
}
fn mk_range(