[clang] Improve ctor initializer completions.

Summary:
Instead of providing generic "args" for member and base class
initializers, tries to fetch relevant constructors and show their signatures.

Reviewers: ilya-biryukov

Reviewed By: ilya-biryukov

Subscribers: ZaMaZaN4iK, eraman, arphaman, cfe-commits

Differential Revision: https://reviews.llvm.org/D53654

llvm-svn: 345844

1 files changed, 45 insertions, 30 deletions

diff --git a/clang/test/CodeCompletion/ctor-initializer.cpp b/clang/test/CodeCompletion/ctor-initializer.cpp
index 2eff48a4a0c..ead99f087ca 100644
--- a/clang/test/CodeCompletion/ctor-initializer.cpp
+++ b/clang/test/CodeCompletion/ctor-initializer.cpp
@@ -2,14 +2,14 @@ struct Base1 {
   Base1() : {}
   // RUN: %clang_cc1 -fsyntax-only -std=c++98 -code-completion-at=%s:2:12 %s -o - | FileCheck -check-prefix=CHECK-CC1 %s
   // RUN: %clang_cc1 -fsyntax-only -std=c++14 -code-completion-at=%s:2:12 %s -o - | FileCheck -check-prefix=CHECK-CC1 %s
-  // CHECK-CC1: COMPLETION: Pattern : member1(<#args#>)
-  // CHECK-CC1: COMPLETION: Pattern : member2(<#args#>
+  // CHECK-CC1: COMPLETION: Pattern : member1(<#int#>)
+  // CHECK-CC1: COMPLETION: Pattern : member2(<#float#>)
 
   Base1(int) : member1(123), {}
   // RUN: %clang_cc1 -fsyntax-only -std=c++98 -code-completion-at=%s:8:30 %s -o - | FileCheck -check-prefix=CHECK-CC2 %s
   // RUN: %clang_cc1 -fsyntax-only -std=c++14 -code-completion-at=%s:8:30 %s -o - | FileCheck -check-prefix=CHECK-CC2 %s
-  // CHECK-CC2-NOT: COMPLETION: Pattern : member1(<#args#>)
-  // CHECK-CC2: COMPLETION: Pattern : member2(<#args#>
+  // CHECK-CC2-NOT: COMPLETION: Pattern : member1(<#int#>)
+  // CHECK-CC2: COMPLETION: Pattern : member2(<#float#>)
 
   int member1;
   float member2;
@@ -25,43 +25,42 @@ struct Derived : public Base1 {
 Derived::Derived() : {}
 // RUN: %clang_cc1 -fsyntax-only -std=c++98 -code-completion-at=%s:25:22 %s -o - | FileCheck -check-prefix=CHECK-CC3 %s
 // RUN: %clang_cc1 -fsyntax-only -std=c++14 -code-completion-at=%s:25:22 %s -o - | FileCheck -check-prefix=CHECK-CC3 %s
-// CHECK-CC3: COMPLETION: Pattern : Base1(<#args#>)
-// CHECK-CC3: COMPLETION: Pattern : deriv1(<#args#>)
+// CHECK-CC3: COMPLETION: Pattern : Base1()
+// CHECK-CC3: COMPLETION: Pattern : Base1(<#int#>)
+// CHECK-CC3: COMPLETION: Pattern : deriv1(<#int#>)
 
 Derived::Derived(int) try : {
 } catch (...) {
 }
-// RUN: %clang_cc1 -fsyntax-only -std=c++98 -code-completion-at=%s:31:29 %s -o - | FileCheck -check-prefix=CHECK-CC4 %s
-// RUN: %clang_cc1 -fsyntax-only -std=c++14 -code-completion-at=%s:31:29 %s -o - | FileCheck -check-prefix=CHECK-CC4 %s
-// CHECK-CC4: COMPLETION: Pattern : Base1(<#args#>)
-// CHECK-CC4: COMPLETION: Pattern : deriv1(<#args#>)
+// RUN: %clang_cc1 -fsyntax-only -std=c++98 -code-completion-at=%s:32:29 %s -o - | FileCheck -check-prefix=CHECK-CC3 %s
+// RUN: %clang_cc1 -fsyntax-only -std=c++14 -code-completion-at=%s:32:29 %s -o - | FileCheck -check-prefix=CHECK-CC3 %s
 
 Derived::Derived(float) try : Base1(),
 {
 } catch (...) {
 }
-// RUN: %clang_cc1 -fsyntax-only -std=c++98 -code-completion-at=%s:39:39 %s -o - | FileCheck -check-prefix=CHECK-CC5 %s
-// RUN: %clang_cc1 -fsyntax-only -std=c++14 -code-completion-at=%s:39:39 %s -o - | FileCheck -check-prefix=CHECK-CC5 %s
-// CHECK-CC5-NOT: COMPLETION: Pattern : Base1(<#args#>)
-// CHECK-CC5: COMPLETION: Pattern : deriv1(<#args#>)
+// RUN: %clang_cc1 -fsyntax-only -std=c++98 -code-completion-at=%s:38:39 %s -o - | FileCheck -check-prefix=CHECK-CC5 %s
+// RUN: %clang_cc1 -fsyntax-only -std=c++14 -code-completion-at=%s:38:39 %s -o - | FileCheck -check-prefix=CHECK-CC5 %s
+// CHECK-CC5-NOT: COMPLETION: Pattern : Base1
+// CHECK-CC5: COMPLETION: Pattern : deriv1(<#int#>)
 
 struct A {
   A() : , member2() {}
-  // RUN: %clang_cc1 -fsyntax-only -std=c++98 -code-completion-at=%s:49:9 %s -o - | FileCheck -check-prefix=CHECK-CC6 %s
-  // RUN: %clang_cc1 -fsyntax-only -std=c++14 -code-completion-at=%s:49:9 %s -o - | FileCheck -check-prefix=CHECK-CC6 %s
-  // CHECK-CC6: COMPLETION: Pattern : member1(<#args#>
+  // RUN: %clang_cc1 -fsyntax-only -std=c++98 -code-completion-at=%s:48:9 %s -o - | FileCheck -check-prefix=CHECK-CC6 %s
+  // RUN: %clang_cc1 -fsyntax-only -std=c++14 -code-completion-at=%s:48:9 %s -o - | FileCheck -check-prefix=CHECK-CC6 %s
+  // CHECK-CC6: COMPLETION: Pattern : member1(<#int#>)
   int member1, member2;
 };
 
 struct B {
   B() : member2() {}
-  // RUN: %clang_cc1 -fsyntax-only -std=c++98 -code-completion-at=%s:57:9 %s -o - | FileCheck -check-prefix=CHECK-CC7 %s
-  // RUN: %clang_cc1 -fsyntax-only -std=c++14 -code-completion-at=%s:57:9 %s -o - | FileCheck -check-prefix=CHECK-CC7 %s
-  // CHECK-CC7: COMPLETION: Pattern : member1(<#args#>
+  // RUN: %clang_cc1 -fsyntax-only -std=c++98 -code-completion-at=%s:56:9 %s -o - | FileCheck -check-prefix=CHECK-CC7 %s
+  // RUN: %clang_cc1 -fsyntax-only -std=c++14 -code-completion-at=%s:56:9 %s -o - | FileCheck -check-prefix=CHECK-CC7 %s
+  // CHECK-CC7: COMPLETION: Pattern : member1(<#int#>)
   // Check in the middle and at the end of identifier too.
-  // RUN: %clang_cc1 -fsyntax-only -std=c++98 -code-completion-at=%s:57:13 %s -o - | FileCheck -check-prefix=CHECK-CC8 %s
-  // RUN: %clang_cc1 -fsyntax-only -std=c++98 -code-completion-at=%s:57:16 %s -o - | FileCheck -check-prefix=CHECK-CC8 %s
-  // CHECK-CC8: COMPLETION: Pattern : member2(<#args#>
+  // RUN: %clang_cc1 -fsyntax-only -std=c++98 -code-completion-at=%s:56:13 %s -o - | FileCheck -check-prefix=CHECK-CC8 %s
+  // RUN: %clang_cc1 -fsyntax-only -std=c++98 -code-completion-at=%s:56:16 %s -o - | FileCheck -check-prefix=CHECK-CC8 %s
+  // CHECK-CC8: COMPLETION: Pattern : member2(<#int#>)
   int member1, member2;
 };
 
@@ -70,9 +69,9 @@ struct Base2 {
 };
 
 struct Composition1 {
-  Composition1() : b2_elem() {}
-  // RUN: %clang_cc1 -fsyntax-only -std=c++98 -code-completion-at=%s:73:28 %s -o - | FileCheck -check-prefix=CHECK-CC9 %s
-  // RUN: %clang_cc1 -fsyntax-only -std=c++14 -code-completion-at=%s:73:28 %s -o - | FileCheck -check-prefix=CHECK-CC9 %s
+  Composition1() : b2_elem(2) {}
+  // RUN: %clang_cc1 -fsyntax-only -std=c++98 -code-completion-at=%s:72:28 %s -o - | FileCheck -check-prefix=CHECK-CC9 %s
+  // RUN: %clang_cc1 -fsyntax-only -std=c++14 -code-completion-at=%s:72:28 %s -o - | FileCheck -check-prefix=CHECK-CC9 %s
   // CHECK-CC9: OVERLOAD: Base2(<#int#>)
   // CHECK-CC9: OVERLOAD: Base2(<#const Base2 &#>)
   // CHECK-CC9-NOT: OVERLOAD: Composition1
@@ -82,9 +81,25 @@ struct Composition1 {
 
 struct Composition2 {
   Composition2() : c1_elem(Base2(1)) {}
-  // RUN: %clang_cc1 -fsyntax-only -std=c++98 -code-completion-at=%s:84:34 %s -o - | FileCheck -check-prefix=CHECK-CC9 %s
-  // RUN: %clang_cc1 -fsyntax-only -std=c++14 -code-completion-at=%s:84:34 %s -o - | FileCheck -check-prefix=CHECK-CC9 %s
-  // RUN: %clang_cc1 -fsyntax-only -std=c++98 -code-completion-at=%s:84:35 %s -o - | FileCheck -check-prefix=CHECK-CC9 %s
-  // RUN: %clang_cc1 -fsyntax-only -std=c++14 -code-completion-at=%s:84:35 %s -o - | FileCheck -check-prefix=CHECK-CC9 %s
+  // RUN: %clang_cc1 -fsyntax-only -std=c++98 -code-completion-at=%s:83:34 %s -o - | FileCheck -check-prefix=CHECK-CC9 %s
+  // RUN: %clang_cc1 -fsyntax-only -std=c++14 -code-completion-at=%s:83:34 %s -o - | FileCheck -check-prefix=CHECK-CC9 %s
+  // RUN: %clang_cc1 -fsyntax-only -std=c++98 -code-completion-at=%s:83:35 %s -o - | FileCheck -check-prefix=CHECK-CC9 %s
+  // RUN: %clang_cc1 -fsyntax-only -std=c++14 -code-completion-at=%s:83:35 %s -o - | FileCheck -check-prefix=CHECK-CC9 %s
   Composition1 c1_elem;
 };
+// RUN: %clang_cc1 -fsyntax-only -std=c++98 -code-completion-at=%s:83:20 %s -o - | FileCheck -check-prefix=CHECK-CC10 %s
+// RUN: %clang_cc1 -fsyntax-only -std=c++14 -code-completion-at=%s:83:20 %s -o - | FileCheck -check-prefix=CHECK-CC10 %s
+// CHECK-CC10: Pattern : c1_elem()
+// CHECK-CC10: Pattern : c1_elem(<#Base2#>)
+
+template <class T>
+struct Y : T {};
+
+template <class T>
+struct X : Y<T> {
+  X() : Y<T>() {};
+};
+
+// RUN: %clang_cc1 -fsyntax-only -std=c++98 -code-completion-at=%s:100:9 %s -o - | FileCheck -check-prefix=CHECK-CC11 %s
+// RUN: %clang_cc1 -fsyntax-only -std=c++14 -code-completion-at=%s:100:9 %s -o - | FileCheck -check-prefix=CHECK-CC11 %s
+// CHECK-CC11: Pattern : Y<T>(<#Y<T>#>)