diff options
Diffstat (limited to 'src/sexpr/variant.hpp')
| -rw-r--r-- | src/sexpr/variant.hpp | 49 |
1 files changed, 36 insertions, 13 deletions
diff --git a/src/sexpr/variant.hpp b/src/sexpr/variant.hpp index fbf9345..0eccc5a 100644 --- a/src/sexpr/variant.hpp +++ b/src/sexpr/variant.hpp @@ -33,19 +33,42 @@ namespace tmwa { namespace sexpr { -#define JOIN(a, b) a##b - -#define WITH_VAR(ty, var, expr) \ - for (bool JOIN(var, _guard) = true; JOIN(var, _guard); ) \ - for (ty var = expr; JOIN(var, _guard); JOIN(var, _guard) = false) -#define MATCH(expr) \ - WITH_VAR(auto&&, _match_var, expr) \ - switch (tmwa::sexpr::VariantFriend::get_state(_match_var)) -#define TYPED_CASE(ty, var, look) \ - break; \ - case tmwa::sexpr::VariantFriend::get_state_for<look, decltype(_match_var)>(): \ - WITH_VAR(ty, var, tmwa::sexpr::VariantFriend::unchecked_get<look>(_match_var)) -#define CASE(ty, var) TYPED_CASE(ty, var, std::remove_const<std::remove_reference<ty>::type>::type) +#define MATCH_BEGIN(expr) \ + { \ + auto&& _match_var = (expr); \ + switch (tmwa::sexpr::VariantFriend::get_state(_match_var)) \ + { \ + { \ + { \ + /* }}}} */ +#define MATCH_END() \ + /* {{{{ */ \ + } \ + } \ + } \ + (void) _match_var; \ + } + +#define MATCH_CASE(ty, v) \ + /* {{{{ */ \ + } \ + break; \ + } \ + { \ + using _match_case_type = std::remove_const<std::remove_reference<ty>::type>::type; \ + case tmwa::sexpr::VariantFriend::get_state_for<_match_case_type, decltype(_match_var)>(): \ + { \ + ty v = tmwa::sexpr::VariantFriend::unchecked_get<_match_case_type>(_match_var); + /* }}}} */ +#define MATCH_DEFAULT() \ + /* {{{{ */ \ + } \ + break; \ + } \ + { \ + default: \ + { \ + /* }}}} */ template<class... T> class Variant |