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TNT / Syntax-Feature-Try-1.002 / src / try-catch-stack.h 
#ifndef __TRY_CATCH_STACK__
#define __TRY_CATCH_STACK__

#define get_sub_context(skip_internals) my_get_sub_context(aTHX_ skip_internals)
static PERL_CONTEXT* my_get_sub_context(pTHX_ int skip_internals);

#endif /* __TRY_CATCH_STACK__ */