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version 2.109.1

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Function std.format.read.unformatValue

Reads a value from the given input range and converts it according to a format specifier.

T unformatValue(T, Range, Char) (
  ref Range input,
  scope const ref FormatSpec!Char spec
);

Parameters

NameDescription
input the input range, to read from
spec a format string
T type to return
Range the type of the input range input
Char the character type used for spec

Returns

A value from input of type T.

Throws

A FormatException if reading did not succeed.

See Also

parse and to

Example

import std.format.spec : singleSpec;

string s = "42";
auto spec = singleSpec("%s");
writeln(unformatValue!int(s, spec)); // 42

Authors

Walter Bright, Andrei Alexandrescu, and Kenji Hara

License

Boost License 1.0.