================
@@ -12071,6 +12071,37 @@ NamespaceDecl *Sema::getOrCreateStdNamespace() {
return getStdNamespace();
}
+/// Check that the template-head of this class template is acceptable for
+/// a declaration of 'std::initializer_list', and optionally diagnose if
+/// it is not.
+/// \returns true if any issues were found.
+static bool CheckStdInitializerList(Sema &S, ClassTemplateDecl *Template,
+ bool Diagnose) {
+ TemplateParameterList *Params = Template->getTemplateParameters();
+ int ErrorKind = -1;
+
+ if (Params->size() != 1)
+ ErrorKind = 0; // must have exactly one template parameter
+ else if (Template->hasAssociatedConstraints())
+ ErrorKind = 1; // cannot have associated constraints
+ else {
+ auto *Param = dyn_cast<TemplateTypeParmDecl>(Params->getParam(0));
+ if (!Param)
+ ErrorKind = 2; // must have a type template parameter
+ else if (Param->hasDefaultArgument())
+ ErrorKind = 3; // cannot have default template arguments
+ else if (Param->isTemplateParameterPack())
+ ErrorKind = 4; // cannot be a variadic template
----------------
tbaederr wrote:
Please start all the comments with an uppercase latter and end them with a
period.
https://github.com/llvm/llvm-project/pull/133822
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