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- fixed: The CheckReturn check for FxSwitchStatement was not strict enough.

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It may only return true if there is no default case because without that any non-matching value will go past the statement.
This commit is contained in:
Christoph Oelckers 2017-01-05 11:39:29 +01:00
parent e13627e9d8
commit b74c374a66
1 changed files with 7 additions and 2 deletions
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9
src/scripting/codegeneration/codegen.cpp
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@ -8926,15 +8926,20 @@ ExpEmit FxSwitchStatement::Emit(VMFunctionBuilder *build)
bool FxSwitchStatement::CheckReturn() bool FxSwitchStatement::CheckReturn()
{ {
//A switch statement returns when it contains no breaks and ends with a return bool founddefault = false;
//A switch statement returns when it contains a no breaks, a default case, and ends with a return
for (auto line : Content) for (auto line : Content)
{ {
if (line->ExprType == EFX_JumpStatement) if (line->ExprType == EFX_JumpStatement)
{ {
return false; // Break means that the end of the statement will be reached, Continue cannot happen in the last statement of the last block. return false; // Break means that the end of the statement will be reached, Continue cannot happen in the last statement of the last block.
} }
else if (line->ExprType == EFX_CaseStatement)
{
if (static_cast<FxCaseStatement*>(line)->Condition == nullptr) founddefault = true;
} }
return Content.Size() > 0 && Content.Last()->CheckReturn(); }
return founddefault && Content.Size() > 0 && Content.Last()->CheckReturn();
} }
//========================================================================== //==========================================================================