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Function `std.format.spec.singleSpec`

Helper function that returns a FormatSpec for a single format specifier.


						
				FormatSpec!Char singleSpec(Char)
				(
				

				  Char[] fmt
				

				);

Parameters

Name	Description
fmt	a format string containing a single format specifier
Char	character type of `fmt`

Returns

A FormatSpec with the format specifier parsed.

Throws

A FormatException when the format string contains no format specifier or more than a single format specifier or when the format specifier is malformed.

Example

import std.array : appender;
import std.format.write : formatValue;

auto spec = singleSpec("%10.3e");
auto writer = appender!string();
writer.formatValue(42.0, spec);

writeln(writer.data); // " 4.200e+01"

Authors

Walter Bright, Andrei Alexandrescu, and Kenji Hara

License

Boost License 1.0.