AbstractFunctionDecl *DeclContext::getInnermostMethodContext() {
DeclContext *result = this;
while (true) {
switch (result->getContextKind()) {
case DeclContextKind::AbstractClosureExpr:
case DeclContextKind::Initializer:
case DeclContextKind::SerializedLocal:
// Look through closures, initial values.
result = result->getParent();
continue;
case DeclContextKind::AbstractFunctionDecl: {
// If this function is a method, we found our result.
auto func = dyn_cast<AbstractFunctionDecl>(result);
if (func->getDeclContext()->isTypeContext())
return func;
// This function isn't a method; look through it.
result = func->getDeclContext();
continue;
}
case DeclContextKind::ExtensionDecl:
case DeclContextKind::FileUnit:
case DeclContextKind::Module:
case DeclContextKind::NominalTypeDecl:
case DeclContextKind::TopLevelCodeDecl:
case DeclContextKind::SubscriptDecl:
// Not in a method context.
return nullptr;
}
}
}
Decl *DeclContext::getInnermostDeclarationDeclContext() {
DeclContext *DC = this;
while (DC) {
switch (DC->getContextKind()) {
case DeclContextKind::AbstractClosureExpr:
case DeclContextKind::Initializer:
case DeclContextKind::SerializedLocal:
case DeclContextKind::Module:
case DeclContextKind::FileUnit:
break;
case DeclContextKind::TopLevelCodeDecl:
return cast<TopLevelCodeDecl>(DC);
case DeclContextKind::AbstractFunctionDecl:
return cast<AbstractFunctionDecl>(DC);
case DeclContextKind::SubscriptDecl:
return cast<SubscriptDecl>(DC);
case DeclContextKind::NominalTypeDecl:
return cast<NominalTypeDecl>(DC);
case DeclContextKind::ExtensionDecl:
return cast<ExtensionDecl>(DC);
}
DC = DC->getParent();
}
return nullptr;
}
DeclContext *DeclContext::getInnermostTypeContext() {
DeclContext *Result = this;
while (true) {
switch (Result->getContextKind()) {
case DeclContextKind::AbstractClosureExpr:
case DeclContextKind::Initializer:
case DeclContextKind::TopLevelCodeDecl:
case DeclContextKind::AbstractFunctionDecl:
case DeclContextKind::SerializedLocal:
Result = Result->getParent();
continue;
case DeclContextKind::Module:
case DeclContextKind::FileUnit:
return nullptr;
case DeclContextKind::ExtensionDecl:
case DeclContextKind::NominalTypeDecl:
return Result;
}
}
}