[−][src]Function clingo_sys::clingo_control_has_const
pub unsafe extern "C" fn clingo_control_has_const(
control: *mut clingo_control_t,
name: *const c_char,
exists: *mut bool
) -> bool
Check if there is a constant definition for the given constant.
@param[in] control the target @param[in] name the name of the constant @param[out] exists whether a matching constant definition exists @return whether the call was successful; might set one of the following error codes:
- ::clingo_error_runtime if constant definition does not exist
@see clingo_control_get_const()