84 lines
1.8 KiB
C++
84 lines
1.8 KiB
C++
// RUN: %clang_cc1 -E %s > %t.src.cpp
|
|
// RUN: %clang_cc1 -E %s > %t.dst.cpp -DDEST
|
|
// RUN: clang-diff -dump-matches -stop-diff-after=topdown %t.src.cpp %t.dst.cpp -- -std=c++11 | FileCheck %s
|
|
//
|
|
// Test the top-down matching of identical subtrees only.
|
|
|
|
#ifndef DEST
|
|
|
|
void f1()
|
|
{
|
|
// Match some subtree of height greater than 2.
|
|
// CHECK: Match CompoundStmt(3) to CompoundStmt(3)
|
|
// CHECK: Match CompoundStmt(4) to CompoundStmt(4)
|
|
// CHECK: Match NullStmt(5) to NullStmt(5)
|
|
{{;}}
|
|
|
|
// Don't match subtrees that are smaller.
|
|
// CHECK-NOT: Match CompoundStmt(6)
|
|
// CHECK-NOT: Match NullStmt(7)
|
|
{;}
|
|
|
|
// Greedy approach - use the first matching subtree when there are multiple
|
|
// identical subtrees.
|
|
// CHECK: Match CompoundStmt(8) to CompoundStmt(8)
|
|
// CHECK: Match CompoundStmt(9) to CompoundStmt(9)
|
|
// CHECK: Match NullStmt(10) to NullStmt(10)
|
|
{{;;}}
|
|
}
|
|
|
|
int x;
|
|
|
|
namespace src {
|
|
int x;
|
|
int x1 = x + 1;
|
|
int x2 = ::x + 1;
|
|
}
|
|
|
|
class A { int x = 1 + 1; void f() { int x1 = x; } };
|
|
|
|
#else
|
|
|
|
|
|
void f1() {
|
|
|
|
{{;}}
|
|
|
|
{;}
|
|
|
|
{{;;}}
|
|
// CHECK-NOT: Match {{.*}} to CompoundStmt(11)
|
|
// CHECK-NOT: Match {{.*}} to CompoundStmt(12)
|
|
// CHECK-NOT: Match {{.*}} to NullStmt(13)
|
|
{{;;}}
|
|
|
|
// CHECK-NOT: Match {{.*}} to NullStmt(14)
|
|
;
|
|
}
|
|
|
|
int x;
|
|
|
|
namespace dst {
|
|
int x;
|
|
// CHECK: Match DeclRefExpr: :x(17) to DeclRefExpr: :x(22)
|
|
int x1 = x + 1;
|
|
// CHECK: Match DeclRefExpr: x(21) to DeclRefExpr: x(26)
|
|
int x2 = ::x + 1;
|
|
}
|
|
|
|
class B {
|
|
// Only the class name changed; it is not included in the field value,
|
|
// therefore there is no update.
|
|
// CHECK: Match FieldDecl: :x(int)(24) to FieldDecl: :x(int)(29)
|
|
// CHECK-NOT: Update FieldDecl: :x(int)(24)
|
|
int x = 1+1;
|
|
void f() {
|
|
// CHECK: Match MemberExpr: :x(32) to MemberExpr: :x(37)
|
|
// CHECK-NOT: Update MemberExpr: :x(32)
|
|
int x1 = B::x;
|
|
}
|
|
|
|
};
|
|
|
|
#endif
|