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method

check_signedness

Importance_2
Ruby latest stable (v1_9_3_392) - 0 notes - Class: Object
check_signedness(type, headers = nil, opts = nil, &b) public

Returns the signedness of the given type. You may optionally specify additional headers to search in for the type.

If the type is found and is a numeric type, a macro is passed as a preprocessor constant to the compiler using the type name, in uppercase, prepended with ‘SIGNEDNESS_OF_’, followed by the type name, followed by ‘=X’ where ‘X’ is positive integer if the type is unsigned, or negative integer if the type is signed.

For example, if size_t is defined as unsigned, then check_signedness(‘size_t’) would returned +1 and the SIGNEDNESS_OF_SIZE_T=+1 preprocessor macro would be passed to the compiler, and SIGNEDNESS_OF_INT=-1 if check_signedness(‘int’) is done.

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