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Fallthrough fixes for destructuring and allHadReturns

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This commit is contained in:
Brian Fiete 2021-06-19 09:29:36 -07:00
parent fa6bdc0d04
commit 5e9ac07804
3 changed files with 54 additions and 1 deletions
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13
IDEHelper/Compiler/BfStmtEvaluator.cpp
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@ -3621,6 +3621,8 @@ void BfModule::DoIfStatement(BfIfStatement* ifStmt, bool includeTrueStmt, bool i
VisitEmbeddedStatement(ifStmt->mTrueStatement);
}
prevDLA.Restore();
if (mCurMethodState->mDeferredLocalAssignData != NULL)
mCurMethodState->mDeferredLocalAssignData->mLeftBlock = deferredLocalAssignData.mLeftBlock;
bool trueHadReturn = mCurMethodState->mHadReturn;
@ -4365,6 +4367,14 @@ 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);
}
}
}
BfIRBlock lastNotEqBlock;
@ -4664,7 +4674,8 @@ void BfModule::Visit(BfSwitchStatement* switchStmt)
openedScope = false;
deferredLocalAssignDataVec[blockIdx].mHadReturn = hadReturn;
caseCount++;
if ((!hadReturn) && (!mCurMethodState->mDeferredLocalAssignData->mHadFallthrough))
if ((!hadReturn) &&
((!mCurMethodState->mDeferredLocalAssignData->mHadFallthrough) || (mCurMethodState->mDeferredLocalAssignData->mLeftBlock)))
allHadReturns = false;
if (auto block = BfNodeDynCast<BfBlock>(switchCase->mCodeBlock))

18
IDEHelper/Tests/src/Switches.bf Normal file
View file

@ -0,0 +1,18 @@
using System;
namespace Tests
{
class Switches
{
int Switch0(Result<int> res)
{
switch (res)
{
case .Ok(let a):
return 0;
case .Err(let b):
return 1;
}
}
}
}