| 1 | // RUN: %clang_cc1 -E %s > %t.src.cpp |
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| 2 | // RUN: %clang_cc1 -E %s > %t.dst.cpp -DDEST |
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| 3 | // RUN: clang-diff -dump-matches -stop-diff-after=topdown %t.src.cpp %t.dst.cpp -- -std=c++11 | FileCheck %s |
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| 4 | // |
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| 5 | // Test the top-down matching of identical subtrees only. |
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| 6 | |
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| 7 | #ifndef DEST |
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| 8 | |
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| 9 | void f1() |
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| 10 | { |
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| 11 | // Match some subtree of height greater than 2. |
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| 12 | // CHECK: Match CompoundStmt(3) to CompoundStmt(3) |
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| 13 | // CHECK: Match CompoundStmt(4) to CompoundStmt(4) |
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| 14 | // CHECK: Match NullStmt(5) to NullStmt(5) |
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| 15 | {{;}} |
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| 16 | |
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| 17 | // Don't match subtrees that are smaller. |
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| 18 | // CHECK-NOT: Match CompoundStmt(6) |
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| 19 | // CHECK-NOT: Match NullStmt(7) |
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| 20 | {;} |
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| 21 | |
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| 22 | // Greedy approach - use the first matching subtree when there are multiple |
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| 23 | // identical subtrees. |
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| 24 | // CHECK: Match CompoundStmt(8) to CompoundStmt(8) |
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| 25 | // CHECK: Match CompoundStmt(9) to CompoundStmt(9) |
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| 26 | // CHECK: Match NullStmt(10) to NullStmt(10) |
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| 27 | {{;;}} |
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| 28 | } |
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| 29 | |
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| 30 | int x; |
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| 31 | |
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| 32 | namespace src { |
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| 33 | int x; |
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| 34 | int x1 = x + 1; |
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| 35 | int x2 = ::x + 1; |
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| 36 | } |
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| 37 | |
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| 38 | class A { int x = 1 + 1; void f() { int x1 = x; } }; |
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| 39 | |
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| 40 | #else |
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| 41 | |
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| 42 | |
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| 43 | void f1() { |
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| 44 | |
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| 45 | {{;}} |
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| 46 | |
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| 47 | {;} |
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| 48 | |
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| 49 | {{;;}} |
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| 50 | // CHECK-NOT: Match {{.*}} to CompoundStmt(11) |
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| 51 | // CHECK-NOT: Match {{.*}} to CompoundStmt(12) |
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| 52 | // CHECK-NOT: Match {{.*}} to NullStmt(13) |
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| 53 | {{;;}} |
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| 54 | |
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| 55 | // CHECK-NOT: Match {{.*}} to NullStmt(14) |
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| 56 | ; |
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| 57 | } |
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| 58 | |
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| 59 | int x; |
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| 60 | |
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| 61 | namespace dst { |
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| 62 | int x; |
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| 63 | // CHECK: Match DeclRefExpr: :x(17) to DeclRefExpr: :x(22) |
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| 64 | int x1 = x + 1; |
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| 65 | // CHECK: Match DeclRefExpr: x(21) to DeclRefExpr: x(26) |
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| 66 | int x2 = ::x + 1; |
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| 67 | } |
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| 68 | |
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| 69 | class B { |
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| 70 | // Only the class name changed; it is not included in the field value, |
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| 71 | // therefore there is no update. |
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| 72 | // CHECK: Match FieldDecl: :x(int)(24) to FieldDecl: :x(int)(29) |
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| 73 | // CHECK-NOT: Update FieldDecl: :x(int)(24) |
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| 74 | int x = 1+1; |
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| 75 | void f() { |
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| 76 | // CHECK: Match MemberExpr: :x(32) to MemberExpr: :x(37) |
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| 77 | // CHECK-NOT: Update MemberExpr: :x(32) |
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| 78 | int x1 = B::x; |
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| 79 | } |
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| 80 | |
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| 81 | }; |
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| 82 | |
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| 83 | #endif |
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| 84 | |
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