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A (non-macro) identifier has the same first N (case-sensitive) characters as one or more macro names, where N depends on the setting of SIGNIFICANCE_LEN_MACRO.
See Identifier Classes for related warning classes.
| Class Name | Non-distinct Identifiers: Macro/Other | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Significance | style | ||||||||||||||||||
| Mnemonic | LANG.ID.ND.MO | ||||||||||||||||||
| Categories |
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| Availability | Available for C and C++. |
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| Enabling | Checks for this warning class are disabled by default,
and require the unnormalized
C ASTs for the project. To enable them, add the following
WARNING_FILTER rule and RETAIN_UNNORMALIZED_C_AST specification to the project configuration file.
RETAIN_UNNORMALIZED_C_AST = Yes INCREMENTAL_BUILD = No WARNING_FILTER += allow class="Non-distinct Identifiers: Macro/Other" Incrementality Note: This warning class is not available for incremental analyses, even if the class is explicitly enabled. |
Suppose SIGNIFICANCE_LEN_MACRO=-1.
#define MOneitherA /* distinct in first 31 characters */ /* MOc90only123456789012345678901234567890A and * MOc90only123456789012345678901234567890B * are distinct in first 63 characters; not distinct in first 31 characters */ #define MOc90only123456789012345678901234567890A 1 /* MOboth123456789012345678901234567890123456789012345678901234567890B * and * MOboth123456789012345678901234567890123456789012345678901234567890B * are not distinct in first 63 characters */ #define MOboth123456789012345678901234567890123456789012345678901234567890A 1 extern int MOneitherB; /* distinct in first 31 characters */ /* 'Non-distinct Identifiers: Macro/Other' warning issued on following line for C90 only */ void lang_id_nd_mo(int MOc90only123456789012345678901234567890B){ /* 'Non-distinct Identifiers: Macro/Other' warning issued on following line for both C90 and C99 */ int MOboth123456789012345678901234567890123456789012345678901234567890B; /* ... */ }
The following configuration file parameters affect checks for this warning class.
Japanese (ja)