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Implement short-circuit evaluation for the null coalescing operator
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belliash
2026-10-24 00:30:45 +02:00
parent 18e6da6c08
commit 323793153c
2 changed files with 26 additions and 0 deletions
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engine/compiler.c
+19
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@@ -4648,6 +4648,25 @@ static sxi32 PH7_GenStateEmitExprCode(
/* All done */
return SXRET_OK;
}
if(iVmOp == PH7_OP_NULLC) {
/* The parser stores the source LHS in pRight for this right-associative operator. */
rc = PH7_GenStateEmitExprCode(&(*pGen), pNode->pRight, iFlags);
if(rc != SXRET_OK) {
return rc;
}
/* Preserve a non-empty LHS without converting it to boolean. */
PH7_VmEmitInstr(pGen->pVm, pGen->pIn->nLine, PH7_OP_JMPNZ, 2, 0, 0, &nJmpIdx);
PH7_VmEmitInstr(pGen->pVm, pGen->pIn->nLine, PH7_OP_POP, 1, 0, 0, 0);
rc = PH7_GenStateEmitExprCode(&(*pGen), pNode->pLeft, iFlags);
if(rc != SXRET_OK) {
return rc;
}
pInstr = PH7_VmGetInstr(pGen->pVm, nJmpIdx);
if(pInstr) {
pInstr->iP2 = PH7_VmInstrLength(pGen->pVm);
}
return SXRET_OK;
}
/* Generate code for the left tree */
if(pNode->pLeft) {
if(iVmOp == PH7_OP_CALL) {