Language: null coalescing operator (??) — closes #99 - #334
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Closes #99 by lowering Coalesce CFG nodes through TYPE_COALESCE branch blocks with isset semantics, adding php-types reconstruction support, and compliance coverage; JIT merge lowering is started but still needs phi fixes. Co-authored-by: Cursor <cursoragent@cursor.com>
Resolve VM.php conflict (keep TYPE_COALESCE + TYPE_EXIT) and regenerate bootstrap-inventory.md after master landed die()/exit() support. Co-authored-by: Cursor <cursoragent@cursor.com>
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Summary
??(null coalescing) in the CFG → VM pipeline viaTYPE_COALESCEbranch lowering with PHPisset()semantics for variables and array offsets.php-typesreconstruction forExpr_BinaryOp_Coalesceand removes the construct fromUnsupportedRegistry/docs/unsupported-syntax.md.test/compliance/cases/language/coalesce.phptand updates lint unit tests.Test plan
docker run … php bin/vm.php -r '$b=null; echo $b ?? "Guest";'→Guestvendor/bin/phpunit test/compliance/ --filter coalescevendor/bin/phpunit test/unit/LintTest.php??merge lowering (TYPE_COALESCE inlib/JIT.php) — LLVM phi/terminator fixes still needed; VM path is completeVerified locally with
./script/docker-ci-local.sh(tar fallback) on compliance + lint suites.Closes #99
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