ControlChar

import std.algorithm.comparison, std.algorithm.searching, std.range, std.traits;

// Because all ASCII characters fit in char, so do these
static assert(ControlChar.ack.sizeof == 1);

// All control characters except del are in row starting from 0
static assert(EnumMembers!ControlChar.only.until(ControlChar.del).equal(iota(32)));

static assert(ControlChar.nul == '\0');
static assert(ControlChar.bel == '\a');
static assert(ControlChar.bs  == '\b');
static assert(ControlChar.ff  == '\f');
static assert(ControlChar.lf  == '\n');
static assert(ControlChar.cr  == '\r');
static assert(ControlChar.tab == '\t');
static assert(ControlChar.vt  == '\v');

import std.conv;
//Control character table can be used in place of hexcodes.
with (ControlChar) assert(text("Phobos", us, "Deimos", us, "Tango", rs) == "Phobos\x1FDeimos\x1FTango\x1E");