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Juhani Krekelä 2018-08-11 21:02:16 +03:00
parent 8a8a1b7ad7
commit 72689a1b24
1 changed files with 8 additions and 8 deletions
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16
cmaybe.h
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@ -1,18 +1,18 @@
#ifndef CMAYBE_H
#define CMAYBE_H
#define MAYBE_TYPE(name, type) struct maybe_##name {type value; char is_value;}
#define MAYBE(name) struct maybe_##name
#define MAYBE_TYPE(name, type) struct cmaybe_maybe_##name {type value; char is_value;}
#define MAYBE(name) struct cmaybe_maybe_##name
#define ENABLE_RETURN(name) MAYBE(name) _return_value
#define ENABLE_RETURN(name) MAYBE(name) cmaybe_return_value
#define RETURN_VALUE(x) do {\
_return_value.is_value = 1;\
_return_value.value = x;\
return _return_value;\
cmaybe_return_value.is_value = 1;\
cmaybe_return_value.value = x;\
return cmaybe_return_value;\
} while(0)
#define RETURN_NOTHING() do {\
_return_value.is_value = 0;\
return _return_value;\
cmaybe_return_value.is_value = 0;\
return cmaybe_return_value;\
} while(0)
#define IS_VALUE(x) if ((x).is_value)