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| <h2 class="chapter">11 Implementation Details</h2> |
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| <p>Here we document details of how the preprocessor's implementation |
| affects its user-visible behavior. You should try to avoid undue |
| reliance on behavior described here, as it is possible that it will |
| change subtly in future implementations. |
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| <p>Also documented here are obsolete features and changes from previous |
| versions of CPP. |
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