[clang] 99df06a - [AST] Dump explicit template arguments for UnreslovedLookupExpr. (#90466)

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Mon Apr 29 09:59:08 PDT 2024


Author: Haojian Wu
Date: 2024-04-29T18:59:03+02:00
New Revision: 99df06ac71b12bc5a38240e71cfc37383687b48e

URL: https://github.com/llvm/llvm-project/commit/99df06ac71b12bc5a38240e71cfc37383687b48e
DIFF: https://github.com/llvm/llvm-project/commit/99df06ac71b12bc5a38240e71cfc37383687b48e.diff

LOG: [AST] Dump explicit template arguments for UnreslovedLookupExpr. (#90466)

Having them dump is useful for ad-hoc debugging (context:
https://github.com/llvm/llvm-project/issues/90046)

Added: 
    

Modified: 
    clang/include/clang/AST/ASTNodeTraverser.h
    clang/test/AST/ast-dump-template-json-win32-mangler-crash.cpp
    clang/test/AST/ast-dump-templates.cpp

Removed: 
    


################################################################################
diff  --git a/clang/include/clang/AST/ASTNodeTraverser.h b/clang/include/clang/AST/ASTNodeTraverser.h
index 216dc9eef08b62..bf7c204e4ad73a 100644
--- a/clang/include/clang/AST/ASTNodeTraverser.h
+++ b/clang/include/clang/AST/ASTNodeTraverser.h
@@ -844,6 +844,12 @@ class ASTNodeTraverser
     }
   }
 
+  void VisitUnresolvedLookupExpr(const UnresolvedLookupExpr *E) {
+    if (E->hasExplicitTemplateArgs())
+      for (auto Arg : E->template_arguments())
+        Visit(Arg.getArgument());
+  }
+
   void VisitRequiresExpr(const RequiresExpr *E) {
     for (auto *D : E->getLocalParameters())
       Visit(D);

diff  --git a/clang/test/AST/ast-dump-template-json-win32-mangler-crash.cpp b/clang/test/AST/ast-dump-template-json-win32-mangler-crash.cpp
index cf740516db6f4b..5ac55d269dce48 100644
--- a/clang/test/AST/ast-dump-template-json-win32-mangler-crash.cpp
+++ b/clang/test/AST/ast-dump-template-json-win32-mangler-crash.cpp
@@ -1846,6 +1846,42 @@ int main()
 // CHECK-NEXT:              "kind": "VarTemplateDecl",
 // CHECK-NEXT:              "name": "is_const_v"
 // CHECK-NEXT:             }
+// CHECK-NEXT:            ],
+// CHECK-NEXT:            "inner": [
+// CHECK-NEXT:             {
+// CHECK-NEXT:              "kind": "TemplateArgument",
+// CHECK-NEXT:              "type": {
+// CHECK-NEXT:               "qualType": "const _Ty"
+// CHECK-NEXT:              },
+// CHECK-NEXT:              "inner": [
+// CHECK-NEXT:               {
+// CHECK-NEXT:                "id": "0x{{.*}}",
+// CHECK-NEXT:                "kind": "QualType",
+// CHECK-NEXT:                "type": {
+// CHECK-NEXT:                 "qualType": "const _Ty"
+// CHECK-NEXT:                },
+// CHECK-NEXT:                "qualifiers": "const",
+// CHECK-NEXT:                "inner": [
+// CHECK-NEXT:                 {
+// CHECK-NEXT:                  "id": "0x{{.*}}",
+// CHECK-NEXT:                  "kind": "TemplateTypeParmType",
+// CHECK-NEXT:                  "type": {
+// CHECK-NEXT:                   "qualType": "_Ty"
+// CHECK-NEXT:                  },
+// CHECK-NEXT:                  "isDependent": true,
+// CHECK-NEXT:                  "isInstantiationDependent": true,
+// CHECK-NEXT:                  "depth": 0,
+// CHECK-NEXT:                  "index": 0,
+// CHECK-NEXT:                  "decl": {
+// CHECK-NEXT:                   "id": "0x{{.*}}",
+// CHECK-NEXT:                   "kind": "TemplateTypeParmDecl",
+// CHECK-NEXT:                   "name": "_Ty"
+// CHECK-NEXT:                  }
+// CHECK-NEXT:                 }
+// CHECK-NEXT:                ]
+// CHECK-NEXT:               }
+// CHECK-NEXT:              ]
+// CHECK-NEXT:             }
 // CHECK-NEXT:            ]
 // CHECK-NEXT:           }
 // CHECK-NEXT:          ]
@@ -1900,6 +1936,32 @@ int main()
 // CHECK-NEXT:              "kind": "VarTemplateDecl",
 // CHECK-NEXT:              "name": "is_reference_v"
 // CHECK-NEXT:             }
+// CHECK-NEXT:            ],
+// CHECK-NEXT:            "inner": [
+// CHECK-NEXT:             {
+// CHECK-NEXT:              "kind": "TemplateArgument",
+// CHECK-NEXT:              "type": {
+// CHECK-NEXT:               "qualType": "_Ty"
+// CHECK-NEXT:              },
+// CHECK-NEXT:              "inner": [
+// CHECK-NEXT:               {
+// CHECK-NEXT:                "id": "0x{{.*}}",
+// CHECK-NEXT:                "kind": "TemplateTypeParmType",
+// CHECK-NEXT:                "type": {
+// CHECK-NEXT:                 "qualType": "_Ty"
+// CHECK-NEXT:                },
+// CHECK-NEXT:                "isDependent": true,
+// CHECK-NEXT:                "isInstantiationDependent": true,
+// CHECK-NEXT:                "depth": 0,
+// CHECK-NEXT:                "index": 0,
+// CHECK-NEXT:                "decl": {
+// CHECK-NEXT:                 "id": "0x{{.*}}",
+// CHECK-NEXT:                 "kind": "TemplateTypeParmDecl",
+// CHECK-NEXT:                 "name": "_Ty"
+// CHECK-NEXT:                }
+// CHECK-NEXT:               }
+// CHECK-NEXT:              ]
+// CHECK-NEXT:             }
 // CHECK-NEXT:            ]
 // CHECK-NEXT:           }
 // CHECK-NEXT:          ]
@@ -2565,6 +2627,32 @@ int main()
 // CHECK-NEXT:            "kind": "VarTemplateDecl",
 // CHECK-NEXT:            "name": "is_function_v"
 // CHECK-NEXT:           }
+// CHECK-NEXT:          ],
+// CHECK-NEXT:          "inner": [
+// CHECK-NEXT:           {
+// CHECK-NEXT:            "kind": "TemplateArgument",
+// CHECK-NEXT:            "type": {
+// CHECK-NEXT:             "qualType": "_Ty1"
+// CHECK-NEXT:            },
+// CHECK-NEXT:            "inner": [
+// CHECK-NEXT:             {
+// CHECK-NEXT:              "id": "0x{{.*}}",
+// CHECK-NEXT:              "kind": "TemplateTypeParmType",
+// CHECK-NEXT:              "type": {
+// CHECK-NEXT:               "qualType": "_Ty1"
+// CHECK-NEXT:              },
+// CHECK-NEXT:              "isDependent": true,
+// CHECK-NEXT:              "isInstantiationDependent": true,
+// CHECK-NEXT:              "depth": 0,
+// CHECK-NEXT:              "index": 0,
+// CHECK-NEXT:              "decl": {
+// CHECK-NEXT:               "id": "0x{{.*}}",
+// CHECK-NEXT:               "kind": "TemplateTypeParmDecl",
+// CHECK-NEXT:               "name": "_Ty1"
+// CHECK-NEXT:              }
+// CHECK-NEXT:             }
+// CHECK-NEXT:            ]
+// CHECK-NEXT:           }
 // CHECK-NEXT:          ]
 // CHECK-NEXT:         }
 // CHECK-NEXT:        ]

diff  --git a/clang/test/AST/ast-dump-templates.cpp b/clang/test/AST/ast-dump-templates.cpp
index d25ef36dd4d32c..9fcafbcbcc46b6 100644
--- a/clang/test/AST/ast-dump-templates.cpp
+++ b/clang/test/AST/ast-dump-templates.cpp
@@ -104,3 +104,17 @@ void (*q)() = f<>;
 // CHECK1: template<> void f<0L>()
 // CHECK1: template<> void f<0U>()
 }
+
+namespace test6 {
+template <class D>
+constexpr bool C = true;
+
+template <class Key>
+void func() {
+  C<Key>;
+// DUMP:      UnresolvedLookupExpr {{.*}} '<dependent type>' lvalue (no ADL) = 'C'
+// DUMP-NEXT: `-TemplateArgument type 'Key'
+// DUMP-NEXT:   `-TemplateTypeParmType {{.*}} 'Key' dependent depth 0 index 0
+// DUMP-NEXT:     `-TemplateTypeParm {{.*}} 'Key'
+}
+}


        


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