Enum

Template housing optimised functions to get the string name of an enum member, or the enum member of a name string.

std.conv.to is typically the go-to for this job; however it quickly bloats the binary and is not performant on larger enums.

@safe

template Enum (

) if (

is(E == enum)

) {

E fromString(string enumstring);

string toString(E value);

}

Members

Functions

fromString E fromString(string enumstring): Takes the member of an enum by string and returns that enum member.
toString string toString(E value): The inverse of fromString, this function takes an enum member value and returns its string identifier.

Parameters

E: enum to base this template on.

Examples

import std.conv : ConvException;
import std.exception  : assertThrown;

enum T
{
    UNSET,
    QUERY,
    PRIVMSG,
    RPL_ENDOFMOTD
}

with (T)
{
    static assert(Enum!T.fromString("QUERY") == QUERY);
    static assert(Enum!T.fromString("PRIVMSG") == PRIVMSG);
    static assert(Enum!T.fromString("RPL_ENDOFMOTD") == RPL_ENDOFMOTD);
    static assert(Enum!T.fromString("UNSET") == UNSET);
    assertThrown!ConvException(Enum!T.fromString("DOESNTEXIST"));  // needs @system
}

with (T)
{
    static assert(Enum!T.toString(QUERY) == "QUERY");
    static assert(Enum!T.toString(PRIVMSG) == "PRIVMSG");
    static assert(Enum!T.toString(RPL_ENDOFMOTD) == "RPL_ENDOFMOTD");
}

lu conv functions

templates

Enum