• State Not Answered
  • Locked Locked
  • Replies 5 replies
  • Subscribers 21 subscribers
  • Views 2738 views
  • Users 0 members are here
2025 survey

We are running a survey to help us improve the experience for all of our members. If you see the survey appear, please take the time to tell us about your experience if you can.

Options
Related
How was your experience today?
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

#if & #error giving C322 Error - enum not defined?

Ralph Greenthal

Hi

Here is the code I have problems with
I an just starting to use this C compiler
Have used many others, mainly closer to C99

#define Num_LANGUAGEs 6


enum _LANGUAGE {
	eUSING_LAN_START = -1,	// This is always the First item
	eUSING_ENGLISH,
	eUSING_ITALIAN,
	eUSING_FRENCH_Can,
	eUSING_LAST_LANG	// This is always the Last item
};

#if Num_LANGUAGEs != eUSING_LAST_LANG
#error "Warning Not enough Lang defined"
#endif

Where is a list of C Compiler error defs(Not in manual)?

Manual poor on #if conditionals, where can I find more info?

Where is "cosf" function, for faster math?
Where is source for Libraries?

Parents
  • 0 in reply to Andy Neil

    If that is true, then surely that is a fundamental change to the very concept of the preprocessor

    Actually that is not true. I've made a mistake. Here is an extract from the C99 standard:

    The expression that controls conditional inclusion shall be an integer constant expression except that: it shall not contain a cast; identifiers (including those lexically identical to keywords) are interpreted as described below; (footnote 140) and it may contain unary operator
    expressions of the form
    defined identifier
    or
    defined ( identifier )
    ...
    footnote 140: Because the controlling constant expression is evaluated during translation phase 4, all identifiers either are or are not macro names — there simply are no keywords, enumeration constants, etc.

    - mike

Reply
  • 0 in reply to Andy Neil

    If that is true, then surely that is a fundamental change to the very concept of the preprocessor

    Actually that is not true. I've made a mistake. Here is an extract from the C99 standard:

    The expression that controls conditional inclusion shall be an integer constant expression except that: it shall not contain a cast; identifiers (including those lexically identical to keywords) are interpreted as described below; (footnote 140) and it may contain unary operator
    expressions of the form
    defined identifier
    or
    defined ( identifier )
    ...
    footnote 140: Because the controlling constant expression is evaluated during translation phase 4, all identifiers either are or are not macro names — there simply are no keywords, enumeration constants, etc.

    - mike

Children