i18n_format_syntax.md topic

Localization Interpolation Syntax

Elona foobar has a string interpolation system to localize various text. Here is a complete syntax of the interpolation.

Syntax in EBNF

The syntax is writte in Extended Backus-Naur form (EBNF).

 replacement  ::=  "{" exp "}"

 exp          ::=  "nil"
                |  "false"
                |  "true"
                |  INT
                |  FLOAT
                |  STR
                |  IDENT "(" args ")"
                |  IDENT "." IDENT "(" args ")"

 args         ::=  { exp separated by "," }

 IDENT        ::=  /[A-Za-z_][A-Za-z_0-9]*/
 INT          ::=  /[0-9]+/
 FLOAT        ::=  /TBD/
 STR          ::=  /TBD/