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Parenthesize ranges on left-hand side of assignment operator #1698

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merged 1 commit into from
Jul 7, 2024
Merged

Parenthesize ranges on left-hand side of assignment operator #1698

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4 changes: 2 additions & 2 deletions src/expr.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -3157,7 +3157,7 @@ pub(crate) mod printing {
outer_attrs_to_tokens(&e.attrs, tokens);
print_subexpression(
&e.left,
Precedence::of(&e.left) <= Precedence::Assign,
Precedence::of(&e.left) <= Precedence::Range,
tokens,
fixup.leftmost_subexpression(),
);
Expand Down Expand Up @@ -3247,7 +3247,7 @@ pub(crate) mod printing {

let binop_prec = Precedence::of_binop(&e.op);
let (mut left_needs_group, right_needs_group) = if let Precedence::Assign = binop_prec {
(left_prec <= binop_prec, right_prec < binop_prec)
(left_prec <= Precedence::Range, right_prec < binop_prec)
} else {
(left_prec < binop_prec, right_prec <= binop_prec)
};
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2 changes: 2 additions & 0 deletions tests/test_expr.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -677,6 +677,8 @@ fn test_fixup() {
quote! { if let _ = ((break) - 1 || true) {} },
quote! { if let _ = (break + 1 || true) {} },
quote! { (break)() },
quote! { (..) = () },
quote! { (..) += () },
] {
let original: Expr = syn::parse2(tokens).unwrap();

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