GCC top-level constant
Graphic Character Combination.
Representation: CSI s \x20 \x5F
Parameter default value: s = 0
GCC is used to indicate that two or more graphic characters are to be imaged as one single graphic symbol. GCC with a parameter value of 0 indicates that the following two graphic characters are to be imaged as one single graphic symbol; GCC with a parameter value of 1 and GCC with a parameter value of 2 indicate respectively the beginning and the end of a string of graphic characters which are to be imaged as one single graphic symbol.
NOTE
GCC does not explicitly specify the relative sizes or placements of the component parts of a composite graphic symbol. In the simplest case, two components may be "half-width" and side-by-side. For example, in Japanese text a pair of characters may be presented side-by-side, and occupy the space of a normal-size Kanji character.
Implementation
const String GCC = ' _';