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Function `std.digest.fromHexStringAsRange`

Converts a hex text string to a range of bytes.


						
				auto fromHexStringAsRange(String)(
				
  String hex
				

				) pure nothrow @nogc @safe
				

				if (isSomeString!String);

The input to this function MUST be valid. std.digest.isHexString can be used to check for this if needed.

Parameters

Name	Description
hex	String representation of a hexdecimal-encoded byte array.

Returns

A forward range of bytes.

Example

import std.range.primitives : ElementType, isForwardRange;
import std.traits : ReturnType;

// The decoder implements a forward range.
static assert(isForwardRange!(ReturnType!(fromHexStringAsRange!string)));
static assert(isForwardRange!(ReturnType!(fromHexStringAsRange!wstring)));
static assert(isForwardRange!(ReturnType!(fromHexStringAsRange!dstring)));

// The element type of the range is always `ubyte`.
static assert(
    is(ElementType!(ReturnType!(fromHexStringAsRange!string)) == ubyte)
);
static assert(
    is(ElementType!(ReturnType!(fromHexStringAsRange!wstring)) == ubyte)
);
static assert(
    is(ElementType!(ReturnType!(fromHexStringAsRange!dstring)) == ubyte)
);

Authors

Johannes Pfau

License

Boost License 1.0.