[CONCEPTS] Add concept to VarDecl and diagnostic for uninitialized variable concept
Summary: Add IsConcept bit to VarDecl::NonParmVarDeclBitfields and associated isConcept/setConcept member functions. Set IsConcept to true when 'concept' specifier is in variable declaration. Create diagnostic when variable concept is not initialized.
Reviewers: fraggamuffin, hubert.reinterpretcast, faisalv, aaron.ballman, rsmith
Subscribers: aemerson, cfe-commits
Differential Revision: http://reviews.llvm.org/D11600
llvm-svn: 243876
diff --git a/clang/lib/Sema/SemaDecl.cpp b/clang/lib/Sema/SemaDecl.cpp
index 9f499de..962610c 100644
--- a/clang/lib/Sema/SemaDecl.cpp
+++ b/clang/lib/Sema/SemaDecl.cpp
@@ -5855,6 +5855,9 @@
if (D.getDeclSpec().isConstexprSpecified())
NewVD->setConstexpr(true);
+
+ if (D.getDeclSpec().isConceptSpecified())
+ NewVD->setConcept(true);
}
// Set the lexical context. If the declarator has a C++ scope specifier, the
@@ -9407,6 +9410,15 @@
return;
}
+ // C++ Concepts TS [dcl.spec.concept]p1: [...] A variable template
+ // definition having the concept specifier is called a variable concept. A
+ // concept definition refers to [...] a variable concept and its initializer.
+ if (Var->isConcept()) {
+ Diag(Var->getLocation(), diag::err_var_concept_not_initialized);
+ Var->setInvalidDecl();
+ return;
+ }
+
// OpenCL v1.1 s6.5.3: variables declared in the constant address space must
// be initialized.
if (!Var->isInvalidDecl() &&