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Function `std.format.singleSpec`

Helper function that returns a FormatSpec for a single specifier given in fmt.


						
				FormatSpec!Char singleSpec(Char)
				(
				

				  Char[] fmt
				

				);

Parameters

Name	Description
fmt	A format specifier.

Returns

A FormatSpec with the specifier parsed.

Throws

A FormatException when more than one specifier is given or the specifier is malformed.

Example

import std.exception : assertThrown;
auto spec = singleSpec("%2.3e");

writeln(spec.trailing); // ""
writeln(spec.spec); // 'e'
writeln(spec.width); // 2
writeln(spec.precision); // 3

assertThrown!FormatException(singleSpec(""));
assertThrown!FormatException(singleSpec("2.3e"));
assertThrown!FormatException(singleSpec("%2.3eTest"));

Authors

Walter Bright, Andrei Alexandrescu, and Kenji Hara

License

Boost License 1.0.