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| CodeSonar® 9.2p0 | CONFIDENTIAL | CodeSecure Inc |
Two or more non-identical identifiers are both in scope and may be confused for one another because their only differences involve characters that are typographically similar:
| Typographically Ambiguous Characters | Description |
|---|---|
| 0 / O | numeric zero / capital o |
| 1 / I / l | numeric one / capital i / lower case L |
| 2 / Z | numeric two / capital z |
| 5 / S | numeric five / capital s |
| 8 / B | numeric eight / capital b |
| h / n | lower case H / lower case N |
| rn / m | lower case RN / lower case M |
| a..z / A..Z | lower case character / upper case equivalent |
| strA_strB / strAstrB | a string containing an underscore / the equivalent string without the underscore |
| Class Name | Typographically Ambiguous Identifiers | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Significance | style | ||||||||||||||||||||||||
| Mnemonic | LANG.ID.AMBIG | ||||||||||||||||||||||||
| 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="Typographically Ambiguous Identifiers" Incrementality Note: This warning class is not available for incremental analyses, even if the class is explicitly enabled. |
int a0; int b1; int c2; int d5; int e8; int fh; /* 'Typographically Ambiguous Identifiers' warning issued here */ int myint; double mydouble; int ma; void ID_AMBIG(void){ int aO; /* 'Typographically Ambiguous Identifiers' warning issued here */ int bI; /* 'Typographically Ambiguous Identifiers' warning issued here */ int cZ; /* 'Typographically Ambiguous Identifiers' warning issued here */ float dS; /* 'Typographically Ambiguous Identifiers' warning issued here */ int * eB; /* 'Typographically Ambiguous Identifiers' warning issued here */ int MyInt; /* 'Typographically Ambiguous Identifiers' warning issued here */ double my_double; /* 'Typographically Ambiguous Identifiers' warning issued here */ int rna; /* 'Typographically Ambiguous Identifiers' warning issued here */ int g1; /* locals for fn() are not in scope */ /* ... */ } void fn(void){ int bl; /* 'Typographically Ambiguous Identifiers' warning issued here */ int gl; /* locals for ID_AMBIG() are not in scope */ /* ... */ }
The following configuration file parameters affect checks for this warning class.
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