TranslatableString

Represents a translatable string.

This struct can for the most part be considered an implementation detail of gettext. A template instantiation like tr!"Greetings" actually results in a constructor call like TranslatableString("Greetings") in the code. This struct is callable, so that a lookup of the translation happens when the struct is evaluated.

The only reason that this struct is public is to make declarations of static arrays of translatable strings less cryptic:

enum RGB {red, green, blue}

// Explicit array of translatable strings:
immutable TranslatableString[Color.max + 1] colors1 = [RGB.red:   tr!"Red",
                                                       RGB.green: tr!"Green",
                                                       RGB.blue:  tr!"Blue"];
// Array of translatable strings where the type is derived:
immutable typeof(tr!"Red")[Color.max + 1] colors2 = [RGB.red:   tr!"Red",
                                                     RGB.green: tr!"Green",
                                                     RGB.blue:  tr!"Blue"];