File: counter.c

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// __COUNTER__ support: rdar://4329310
// RUN: %clang -E %s | FileCheck %s

#define PASTE2(x,y) x##y
#define PASTE1(x,y) PASTE2(x,y)
#define UNIQUE(x) PASTE1(x,__COUNTER__)

A: __COUNTER__
B: UNIQUE(foo);
C: UNIQUE(foo);
D: __COUNTER__

// CHECK: A: 0
// CHECK: B: foo1;
// CHECK: C: foo2;
// CHECK: D: 3