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fix: keep parens around nested ternary in ?: - #2519
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Formatting `(1 ? 2 : 3) ?: 4` stripped the parentheses, producing `1 ? 2 : 3 ?: 4`, which is a syntax error in PHP 8 (unparenthesized nested ternary). needs-parens now keeps parens for a full ternary in the test position of a shorthand ternary (`?:`). Shorthand chains still format unparenthesized since they associate to the left. Closes prettier#2115
czosel
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Oct 19, 2026
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LGTM, thanks for contributing and sorry for the delay!
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Formatting
(1 ? 2 : 3) ?: 4stripped the parentheses, producing1 ? 2 : 3 ?: 4, which is a syntax error in PHP 8 (unparenthesized nested ternary).src/needs-parens.mjsreturnedfalsefor anyretifnode in the test position of a shorthand ternary (?:). It now returnstruewhen the node is itself a full ternary (!!node.trueExpr), keeping the parens. Shorthand chains ($a ?: $b ?: $c) still format without parens since they associate to the left.Added regression cases to
tests/retif/retif.php; snapshot diff is purely additive. Full suite: 101 suites / 595 tests pass, plusAST_COMPARE=1on the retif suite confirms the formatted output re-parses to an equivalent AST.Closes #2115