40 lines
1.2 KiB
C++
40 lines
1.2 KiB
C++
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// RUN: %clang_cc1 -E %s > %t.src.cpp
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// RUN: %clang_cc1 -E %s > %t.dst.cpp -DDEST
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// RUN: clang-diff -dump-matches -s=0 %t.src.cpp %t.dst.cpp -- | FileCheck %s
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//
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// Test the bottom-up matching, with maxsize set to 0, so that the optimal matching will never be applied.
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#ifndef DEST
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void f1() { ; {{;}} }
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void f2() { ;; {{;}} }
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#else
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// Jaccard similarity threshold is 0.5.
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void f1() {
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// CompoundStmt: 3 matched descendants, subtree sizes 4 and 5
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// Jaccard similarity = 3 / (4 + 5 - 3) = 3 / 6 >= 0.5
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// CHECK: Match FunctionDecl: f1(void ())(1) to FunctionDecl: f1(void ())(1)
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// CHECK: Match CompoundStmt(2) to CompoundStmt(2)
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// CHECK: Match CompoundStmt(4) to CompoundStmt(3)
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// CHECK: Match CompoundStmt(5) to CompoundStmt(4)
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// CHECK: Match NullStmt(6) to NullStmt(5)
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{{;}} ;;
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}
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void f2() {
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// CompoundStmt: 3 matched descendants, subtree sizes 4 and 5
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// Jaccard similarity = 3 / (5 + 6 - 3) = 3 / 8 < 0.5
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// CHECK-NOT: Match FunctionDecl(9)
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// CHECK-NOT: Match CompoundStmt(10)
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// CHECK: Match CompoundStmt(11) to CompoundStmt(10)
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// CHECK: Match CompoundStmt(12) to CompoundStmt(11)
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// CHECK: Match NullStmt(13) to NullStmt(12)
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// CHECK-NOT: Match NullStmt(13)
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{{;}} ;;;
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}
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#endif
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