from_string() [5/9]

T Chusov::String::from_string

(

const ucp_t *

pszValue

)

A set of templates providing an interface to convert an argument specifying a C or C++ string to a value of a specified type.

Template Parameters

T	is a type for the string value to convert to. The type T must be either constructible from pszValue directly or be one of the fundamental arithmetic types.

Parameters

pszValue

A C-string containing the value to convert.

Returns

The resulting value.

If the type T is constructible from the parameter, the appropriate constructor is called to produce the return value. Otherwise, if T is one of the arithmetic types, the call a conversion from the string pszValue to the appropriate numeric value. In case of integral T this is done by Chusov::String::from_string(In_z const ucp_t* pszValue, int base = 10) "another overload" chosen using SFINAE.

Note

If a conversion to an arithmetic type takes place, then unlike C and C++ library conversion functions, this function fails, if pszValue is an empty string, or if not the entire pszValue can be converted into the type T, because of parsing errors and (for integral T) when the produced value goes out of valid range of supported values for T.

Exceptions

Chusov::Exceptions::InvalidParameterException

A parsing or range error occurred during a conversion to an arithmetic T.

See also

to_ucp_string(int value)
to_ucp_string(long value)
to_ucp_string(long long value)
to_ucp_string(unsigned value)
to_ucp_string(unsigned long value)
to_ucp_string(unsigned long long value)
to_ucp_string(float value)
to_ucp_string(double value)
to_ucp_string(long double value)
from_string(const ucp_t* pszValue, int base = 10)