tmp/tmpmab16zwr/{from.md → to.md}
RENAMED
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@@ -1,11 +1,10 @@
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##### `ctype` virtual functions <a id="locale.ctype.virtuals">[[locale.ctype.virtuals]]</a>
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``` cpp
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bool do_is(mask m, charT c) const;
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-
const charT* do_is(const charT* low, const charT* high,
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mask* vec) const;
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```
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*Effects:* Classifies a character or sequence of characters. For each
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argument character, identifies a value `M` of type `ctype_base::mask`.
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The second form identifies a value `M` of type `ctype_base::mask` for
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@@ -63,18 +62,17 @@ which a corresponding lower-case character exists, with that character.
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if it is known to exist, or its argument if not. The second form returns
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`high`.
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``` cpp
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charT do_widen(char c) const;
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const char* do_widen(const char* low, const char* high,
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charT* dest) const;
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```
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*Effects:* Applies the simplest reasonable transformation from a `char`
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value or sequence of `char` values to the corresponding `charT` value or
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values.[^5] The only characters for which unique transformations are
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required are those in the basic source character set
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For any named `ctype` category with a `ctype <charT>` facet `ctc` and
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valid `ctype_base::mask` value `M`,
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`(ctc.is(M, c) || !is(M, do_widen(c)) )` is `true`.[^6]
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@@ -84,20 +82,19 @@ The second form transforms each character `*p` in the range \[`low`,
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*Returns:* The first form returns the transformed value. The second form
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returns `high`.
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``` cpp
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char do_narrow(charT c, char dfault) const;
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const charT* do_narrow(const charT* low, const charT* high,
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char dfault, char* dest) const;
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```
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*Effects:* Applies the simplest reasonable transformation from a `charT`
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value or sequence of `charT` values to the corresponding `char` value or
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values.
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-
For any character `c` in the basic source character
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-
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``` cpp
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do_widen(do_narrow(c, 0)) == c
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```
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##### `ctype` virtual functions <a id="locale.ctype.virtuals">[[locale.ctype.virtuals]]</a>
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``` cpp
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bool do_is(mask m, charT c) const;
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+
const charT* do_is(const charT* low, const charT* high, mask* vec) const;
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```
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*Effects:* Classifies a character or sequence of characters. For each
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argument character, identifies a value `M` of type `ctype_base::mask`.
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The second form identifies a value `M` of type `ctype_base::mask` for
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if it is known to exist, or its argument if not. The second form returns
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`high`.
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``` cpp
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charT do_widen(char c) const;
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const char* do_widen(const char* low, const char* high, charT* dest) const;
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```
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*Effects:* Applies the simplest reasonable transformation from a `char`
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value or sequence of `char` values to the corresponding `charT` value or
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values.[^5] The only characters for which unique transformations are
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+
required are those in the basic source character set [[lex.charset]].
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For any named `ctype` category with a `ctype <charT>` facet `ctc` and
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valid `ctype_base::mask` value `M`,
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`(ctc.is(M, c) || !is(M, do_widen(c)) )` is `true`.[^6]
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*Returns:* The first form returns the transformed value. The second form
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returns `high`.
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``` cpp
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char do_narrow(charT c, char dfault) const;
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const charT* do_narrow(const charT* low, const charT* high, char dfault, char* dest) const;
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```
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*Effects:* Applies the simplest reasonable transformation from a `charT`
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value or sequence of `charT` values to the corresponding `char` value or
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values.
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+
For any character `c` in the basic source character set [[lex.charset]]
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the transformation is such that
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``` cpp
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do_widen(do_narrow(c, 0)) == c
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```
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