# std::char_traits<CharT>::to_int_type

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< cpp‎ | string‎ | char traits

static int_type to_int_type( char_type c ); |  | (until C++11)
static constexpr int_type to_int_type( char_type c ) noexcept; |  | (since C++11)

Converts a value of `char_type` to `int_type`.

### Parameters

c | - | value to convert

### Return value

A value equivalent to c.

### Complexity

Constant.

### Notes

For every valid value of `char_type`, there must be a unique value of `int_type` distinct from eof(). For example, a common implementation of char_traits<char>::eof() is return -1;, and a corresponding valid implementation of char_traits<char>::to_int_type(c) is return static_cast<unsigned char>(c);.

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