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| <h3 class="section">4.3 Identifiers</h3> |
| |
| <ul> |
| <li><cite>Which additional multibyte characters may appear in identifiers |
| and their correspondence to universal character names (C99 6.4.2).</cite> |
| |
| <p>See <a href="../cpp/Implementation_002ddefined-behavior.html#Implementation_002ddefined-behavior">Implementation-defined behavior</a>. |
| |
| <li><cite>The number of significant initial characters in an identifier |
| (C90 6.1.2, C90 and C99 5.2.4.1, C99 6.4.2).</cite> |
| |
| <p>For internal names, all characters are significant. For external names, |
| the number of significant characters are defined by the linker; for |
| almost all targets, all characters are significant. |
| |
| <li><cite>Whether case distinctions are significant in an identifier with |
| external linkage (C90 6.1.2).</cite> |
| |
| <p>This is a property of the linker. C99 requires that case distinctions |
| are always significant in identifiers with external linkage and |
| systems without this property are not supported by GCC. |
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