Support pure constraint.

2026-09-01 10:27:04 +02:00 · 2024-11-09 12:05:26 -05:00
parent 1e546bb9d9
commit 3fae11595a
15 changed files with 171 additions and 10 deletions
@@ -162,6 +162,18 @@ private:
        nodep->replaceWith(nodep->lhsp()->unlinkFrBack());
        VL_DO_DANGLING(pushDeletep(nodep), nodep);
    }
+    void visit(AstConstraint* nodep) override {
+        iterateChildren(nodep);
+        editDType(nodep);
+        {
+            const AstClass* const classp = VN_CAST(m_modp, Class);
+            if (nodep->isKwdPure()
+                && (!classp || (!classp->isInterfaceClass() && !classp->isVirtual()))) {
+                nodep->v3error("Illegal to have 'pure constraint' in non-abstract class"
+                               " (IEEE 1800-2023 18.5.2)");
+            }
+        }
+    }
    void visit(AstNodeDType* nodep) override {
        // Note some specific dtypes have unique visitors
        visitIterateNodeDType(nodep);