[clang] [Clang] Implement consteval blocks for C++26 (PR #188665)

[via cfe-commits]

================
@@ -3650,6 +3655,48 @@ StaticAssertDecl *StaticAssertDecl::CreateDeserialized(ASTContext &C,
                                       nullptr, SourceLocation(), false);
 }
 
+void ConstevalBlockDecl::anchor() {}
+
+ConstevalBlockDecl *ConstevalBlockDecl::Create(ASTContext &C, DeclContext *DC,
+                                               SourceLocation ConstevalLoc,
+                                               Expr *Call) {
+  assert(Call);
+  return new (C, DC) ConstevalBlockDecl(DC, ConstevalLoc, Call);
+}
+
+ConstevalBlockDecl *ConstevalBlockDecl::CreateDeserialized(ASTContext &C,
+                                                           GlobalDeclID ID) {
+  return new (C, ID) ConstevalBlockDecl(nullptr, SourceLocation(), nullptr);
+}
+
+SourceRange ConstevalBlockDecl::getSourceRange() const {
+  assert(Call && "should not be called before deserialization is complete");
+  return {getLocation(), Call->getEndLoc()};
+}
+
+LambdaExpr *ConstevalBlockDecl::getLambda() {
+  auto *CE = cast<CallExpr>(Call);
----------------
Sirraide wrote:

Well, `cast` already asserts that it’s not-null

https://github.com/llvm/llvm-project/pull/188665