C enumerated types name scoping
c, enums
Solution
So scoping is not 'witihin' the enum definition?
No. This is not allowed. Enumerator lists define constants. Your `enum`s happen to be in the same scope -- the file scope. You cannot have two constants with the same name within the same scope.
From the draft of CX:
6.7.2.2 Enumeration specifiers
Semantics
3 The identifiers in an enumerator list are declared as constants that have type int and may appear wherever such are permitted.127) [...]
Also, from footnote 127 (which is technically non-normative and for informational purposes only):
127) Thus, the identifiers of enumeration constants declared in the same scope shall all be distinct from each other and from other identifiers declared in ordinary declarators.
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Slightly confused as I like using enums for return integer codes [...]
Use `EXIT_SUCCESS` and `EXIT_FAILURE` defined in `stdlib.h`.
Problem
GCC tells me you can't use the same names for separate enumerated type values, e.g. ``` enum flag_one { SUCCESS, FAIL } enum flag_two { SUCCESS, FAIL } ``` is not allowed by the compiler. So scoping is not 'witihin' the enum definition? Is the approach to do something like: ``` enum flag_one { FLAG_ONE_SUCCESS, FLAG_ONE_FAIL } enum flag_two { FLAG_TWO_SUCCESS, FLAG_TWO_FAIL } ``` Slightly confused as I like using enums for return integer codes as its more readable/descriptive but I'm already starting to get name clashes