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Fixed false destructuring error

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This commit is contained in:
Brian Fiete 2022-05-24 06:52:28 -07:00
parent dd6e7f0c2a
commit 45edfc8604
3 changed files with 19 additions and 22 deletions
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30
IDEHelper/Compiler/BfStmtEvaluator.cpp
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@ -2256,7 +2256,7 @@ void BfModule::HandleTupleVariableDeclaration(BfVariableDeclaration* varDecl)
AssertErrorState();
}
void BfModule::HandleCaseEnumMatch_Tuple(BfTypedValue tupleVal, const BfSizedArray<BfExpression*>& arguments, BfAstNode* tooFewRef, BfIRValue phiVal, BfIRBlock& matchedBlockStart, BfIRBlock& matchedBlockEnd, BfIRBlock& falseBlockStart, BfIRBlock& falseBlockEnd, bool& hadConditional, bool clearOutOnMismatch)
void BfModule::HandleCaseEnumMatch_Tuple(BfTypedValue tupleVal, const BfSizedArray<BfExpression*>& arguments, BfAstNode* tooFewRef, BfIRValue phiVal, BfIRBlock& matchedBlockStart, BfIRBlock& matchedBlockEnd, BfIRBlock& falseBlockStart, BfIRBlock& falseBlockEnd, bool& hadConditional, bool clearOutOnMismatch, bool prevHadFallthrough)
{
SetAndRestoreValue<bool> prevInCondBlock(mCurMethodState->mInConditionalBlock);
@ -2316,6 +2316,10 @@ void BfModule::HandleCaseEnumMatch_Tuple(BfTypedValue tupleVal, const BfSizedArr
PopulateType(tupleElement.mType);
if (!isRef)
tupleElement = LoadValue(tupleElement);
if (prevHadFallthrough)
Fail("Destructuring cannot be used when the previous case contains a fallthrough", expr);
auto localVar = HandleVariableDeclaration(varDecl, tupleElement, false, true);
localVar->mReadFromId = 0; // Don't give usage errors for binds
continue;
@ -2337,7 +2341,7 @@ void BfModule::HandleCaseEnumMatch_Tuple(BfTypedValue tupleVal, const BfSizedArr
tooFewRef = tupleExpr->mValues[tupleExpr->mValues.size() - 1];
if (tooFewRef == NULL)
tooFewRef = tupleExpr->mOpenParen;
HandleCaseEnumMatch_Tuple(tupleElement, tupleExpr->mValues, tooFewRef, phiVal, matchedBlockStart, matchedBlockEnd, falseBlockStart, falseBlockEnd, hadConditional, clearOutOnMismatch);
HandleCaseEnumMatch_Tuple(tupleElement, tupleExpr->mValues, tooFewRef, phiVal, matchedBlockStart, matchedBlockEnd, falseBlockStart, falseBlockEnd, hadConditional, clearOutOnMismatch, prevHadFallthrough);
continue;
}
}
@ -2375,7 +2379,7 @@ void BfModule::HandleCaseEnumMatch_Tuple(BfTypedValue tupleVal, const BfSizedArr
int uncondTagId = -1;
bool hadConditional = false;
exprResult = TryCaseEnumMatch(tupleElementAddr, enumTagVal, expr, NULL, NULL, NULL, uncondTagId, hadConditional, clearOutOnMismatch);
exprResult = TryCaseEnumMatch(tupleElementAddr, enumTagVal, expr, NULL, NULL, NULL, uncondTagId, hadConditional, clearOutOnMismatch, prevHadFallthrough);
}
}
}
@ -2515,7 +2519,7 @@ void BfModule::HandleCaseEnumMatch_Tuple(BfTypedValue tupleVal, const BfSizedArr
}
}
BfTypedValue BfModule::TryCaseTupleMatch(BfTypedValue tupleVal, BfTupleExpression* tupleExpr, BfIRBlock* eqBlock, BfIRBlock* notEqBlock, BfIRBlock* matchBlock, bool& hadConditional, bool clearOutOnMismatch)
BfTypedValue BfModule::TryCaseTupleMatch(BfTypedValue tupleVal, BfTupleExpression* tupleExpr, BfIRBlock* eqBlock, BfIRBlock* notEqBlock, BfIRBlock* matchBlock, bool& hadConditional, bool clearOutOnMismatch, bool prevHadFallthrough)
{
if (!tupleVal.mType->IsTuple())
return BfTypedValue();
@ -2642,7 +2646,7 @@ BfTypedValue BfModule::TryCaseTupleMatch(BfTypedValue tupleVal, BfTupleExpressio
mBfIRBuilder->SetInsertPoint(matchedBlockStart);
BfIRBlock matchedBlockEnd = matchedBlockStart;
HandleCaseEnumMatch_Tuple(tupleVal, tupleExpr->mValues, tooFewRef, falseBlockStart ? BfIRValue() : phiVal, matchedBlockStart, matchedBlockEnd,
falseBlockStart ? falseBlockStart : doneBlockStart, falseBlockEnd ? falseBlockEnd : doneBlockEnd, hadConditional, clearOutOnMismatch);
falseBlockStart ? falseBlockStart : doneBlockStart, falseBlockEnd ? falseBlockEnd : doneBlockEnd, hadConditional, clearOutOnMismatch, prevHadFallthrough);
if (phiVal)
{
@ -2675,7 +2679,7 @@ BfTypedValue BfModule::TryCaseTupleMatch(BfTypedValue tupleVal, BfTupleExpressio
return GetDefaultTypedValue(boolType);
}
BfTypedValue BfModule::TryCaseEnumMatch(BfTypedValue enumVal, BfTypedValue tagVal, BfExpression* expr, BfIRBlock* eqBlock, BfIRBlock* notEqBlock, BfIRBlock* matchBlock, int& tagId, bool& hadConditional, bool clearOutOnMismatch)
BfTypedValue BfModule::TryCaseEnumMatch(BfTypedValue enumVal, BfTypedValue tagVal, BfExpression* expr, BfIRBlock* eqBlock, BfIRBlock* notEqBlock, BfIRBlock* matchBlock, int& tagId, bool& hadConditional, bool clearOutOnMismatch, bool prevHadFallthrough)
{
auto invocationExpr = BfNodeDynCast<BfInvocationExpression>(expr);
if (invocationExpr == NULL)
@ -2916,7 +2920,7 @@ BfTypedValue BfModule::TryCaseEnumMatch(BfTypedValue enumVal, BfTypedValue tagVa
HandleCaseEnumMatch_Tuple(tupleVal, invocationExpr->mArguments, tooFewRef, falseBlockStart ? BfIRValue() : phiVal, matchedBlockStart, matchedBlockEnd,
falseBlockStart ? falseBlockStart : doneBlockStart, falseBlockEnd ? falseBlockEnd : doneBlockEnd,
hadConditional, clearOutOnMismatch);
hadConditional, clearOutOnMismatch, prevHadFallthrough);
///////
@ -4499,14 +4503,6 @@ void BfModule::Visit(BfSwitchStatement* switchStmt)
hadWhen = true;
whenExpr = checkWhenExpr;
}
if (auto invocationExpr = BfNodeDynCast<BfInvocationExpression>(caseExpr))
{
if (prevHadFallthrough)
{
Fail("Destructuring cannot be used when the previous case contains a fallthrough", caseExpr);
}
}
}
bool wantsOpenedScope = isPayloadEnum || isTuple;
@ -4555,7 +4551,7 @@ void BfModule::Visit(BfSwitchStatement* switchStmt)
}
else
{
eqTypedResult = TryCaseEnumMatch(switchValueAddr, enumTagVal, caseExpr, &caseBlock, &notEqBB, &matchBlock, tagId, hadConditional, false);
eqTypedResult = TryCaseEnumMatch(switchValueAddr, enumTagVal, caseExpr, &caseBlock, &notEqBB, &matchBlock, tagId, hadConditional, false, prevHadFallthrough);
if (hadConditional)
hadCondCase = true;
}
@ -4579,7 +4575,7 @@ void BfModule::Visit(BfSwitchStatement* switchStmt)
notEqBB = mBfIRBuilder->CreateBlock(StrFormat("switch.notEq.%d", blockIdx), false);
BfIRBlock matchBlock;
BfTypedValue eqTypedResult = TryCaseTupleMatch(switchValue, tupleExpr, &caseBlock, &notEqBB, &matchBlock, hadConditional, false);
BfTypedValue eqTypedResult = TryCaseTupleMatch(switchValue, tupleExpr, &caseBlock, &notEqBB, &matchBlock, hadConditional, false, prevHadFallthrough);
if (hadConditional)
hadCondCase = true;
if (eqTypedResult)