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#pragma once
#define LET_LOOP__(expr, ctr) \
if (0) \
__done_##ctr: continue; \
else if (0) \
__break_##ctr: break; \
else \
for (; ; ({ goto __break_##ctr; })) \
for (expr; ; ({ goto __done_##ctr; }))
#define LET_LOOP_(expr, ctr) LET_LOOP__(expr, ctr)
#define LET_LOOP(expr) LET_LOOP_(expr, __COUNTER__)
#define LET__(expr, ctr) \
if (0) \
__done_##ctr: ; \
else \
for (expr; ; ({ goto __done_##ctr; }))
#define LET_(expr, ctr) LET__(expr, ctr)
#define LET(expr) LET_(expr, __COUNTER__)
#define safe_mul(a, b) ((a) * (b)) /* XXX */
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