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-rw-r--r--src/lib/cc/compat_compiler.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/src/lib/cc/compat_compiler.h b/src/lib/cc/compat_compiler.h
index 3a0f307186..18b76cc1a1 100644
--- a/src/lib/cc/compat_compiler.h
+++ b/src/lib/cc/compat_compiler.h
@@ -217,4 +217,16 @@
/** Macro: Yields the number of elements in array x. */
#define ARRAY_LENGTH(x) ((sizeof(x)) / sizeof(x[0]))
+/**
+ * "Eat" a semicolon that somebody puts at the end of a top-level macro.
+ *
+ * Frequently, we want to declare a macro that people will use at file scope,
+ * and we want to allow people to put a semicolon after the macro.
+ *
+ * This declaration of a struct can be repeated any number of times, and takes
+ * a trailing semicolon afterwards.
+ **/
+#define EAT_SEMICOLON \
+ struct dummy_semicolon_eater__
+
#endif /* !defined(TOR_COMPAT_H) */