[Concepts] Concept definitions (D40381)
First in a series of patches to land C++2a Concepts support.
This patch adds AST and parsing support for concept-declarations.
llvm-svn: 365699
diff --git a/clang/lib/AST/ASTStructuralEquivalence.cpp b/clang/lib/AST/ASTStructuralEquivalence.cpp
index 744b30f..bb2e353 100644
--- a/clang/lib/AST/ASTStructuralEquivalence.cpp
+++ b/clang/lib/AST/ASTStructuralEquivalence.cpp
@@ -1513,6 +1513,18 @@
}
static bool IsStructurallyEquivalent(StructuralEquivalenceContext &Context,
+ ConceptDecl *D1,
+ ConceptDecl *D2) {
+ // Check template parameters.
+ if (!IsTemplateDeclCommonStructurallyEquivalent(Context, D1, D2))
+ return false;
+
+ // Check the constraint expression.
+ return IsStructurallyEquivalent(Context, D1->getConstraintExpr(),
+ D2->getConstraintExpr());
+}
+
+static bool IsStructurallyEquivalent(StructuralEquivalenceContext &Context,
FriendDecl *D1, FriendDecl *D2) {
if ((D1->getFriendType() && D2->getFriendDecl()) ||
(D1->getFriendDecl() && D2->getFriendType())) {
@@ -1771,6 +1783,14 @@
// Class template/non-class-template mismatch.
return false;
}
+ } else if (auto *ConceptDecl1 = dyn_cast<ConceptDecl>(D1)) {
+ if (auto *ConceptDecl2 = dyn_cast<ConceptDecl>(D2)) {
+ if (!::IsStructurallyEquivalent(*this, ConceptDecl1, ConceptDecl2))
+ return false;
+ } else {
+ // Concept/non-concept mismatch.
+ return false;
+ }
} else if (auto *TTP1 = dyn_cast<TemplateTypeParmDecl>(D1)) {
if (auto *TTP2 = dyn_cast<TemplateTypeParmDecl>(D2)) {
if (!::IsStructurallyEquivalent(*this, TTP1, TTP2))