tmp/tmpo1ppq_vu/{from.md → to.md}
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#### General <a id="category.ctype.general">[[category.ctype.general]]</a>
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``` cpp
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namespace std {
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class ctype_base {
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public:
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using mask = see below;
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// numeric values are for exposition only.
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static const mask space = 1 << 0;
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static const mask print = 1 << 1;
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static const mask cntrl = 1 << 2;
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static const mask upper = 1 << 3;
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static const mask lower = 1 << 4;
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static const mask alpha = 1 << 5;
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static const mask digit = 1 << 6;
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static const mask punct = 1 << 7;
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static const mask xdigit = 1 << 8;
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static const mask blank = 1 << 9;
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static const mask alnum = alpha | digit;
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static const mask graph = alnum | punct;
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};
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}
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```
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The type `mask` is a bitmask type [[bitmask.types]].
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