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Fixed a crash when trying to include a missing mixin.

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This commit is contained in:
Chronos Ouroboros 2020-02-14 22:25:18 -03:00
parent bd216695cc
commit 6486380dd1
1 changed files with 15 additions and 7 deletions
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22
src/scripting/zscript/zcc_compile.cpp
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@ -100,8 +100,6 @@ FString ZCCCompiler::StringConstFromNode(ZCC_TreeNode *node, PContainerType *cls
ZCC_MixinDef *ZCCCompiler::ResolveMixinStmt(ZCC_MixinStmt *mixinStmt, EZCCMixinType type)
{
ZCC_MixinDef *mixinDef = nullptr;
for (auto mx : Mixins)
{
if (mx->mixin->NodeName == mixinStmt->MixinName)
@ -109,18 +107,16 @@ ZCC_MixinDef *ZCCCompiler::ResolveMixinStmt(ZCC_MixinStmt *mixinStmt, EZCCMixinT
if (mx->mixin->MixinType != type)
{
Error(mixinStmt, "Mixin %s is a %s mixin cannot be used here.", FName(mixinStmt->MixinName).GetChars(), GetMixinTypeString(type));
return nullptr;
}
return mx->mixin;
}
}
if (mixinDef == nullptr)
{
Error(mixinStmt, "Mixin %s does not exist.", FName(mixinStmt->MixinName).GetChars());
}
Error(mixinStmt, "Mixin %s does not exist.", FName(mixinStmt->MixinName).GetChars());
return mixinDef;
return nullptr;
}
@ -163,6 +159,7 @@ void ZCCCompiler::ProcessClass(ZCC_Class *cnode, PSymbolTreeNode *treenode)
// [pbeta] Handle mixins here for the sake of simplifying things.
if (node != nullptr)
{
bool mixinError = false;
TArray<ZCC_MixinStmt *> mixinStmts;
mixinStmts.Clear();
@ -182,6 +179,12 @@ void ZCCCompiler::ProcessClass(ZCC_Class *cnode, PSymbolTreeNode *treenode)
{
ZCC_MixinDef *mixinDef = ResolveMixinStmt(mixinStmt, ZCC_Mixin_Class);
if (mixinDef == nullptr)
{
mixinError = true;
continue;
}
// Insert the mixin if there's a body. If not, just remove this node.
if (mixinDef->Body != nullptr)
{
@ -230,6 +233,11 @@ void ZCCCompiler::ProcessClass(ZCC_Class *cnode, PSymbolTreeNode *treenode)
}
mixinStmts.Clear();
if (mixinError)
{
return;
}
}
node = cnode->Body;