Module: EBNF::Terminals

Included in:
Parser, EBNFLL1Parser, EBNFPegParser
Defined in:
lib/ebnf/terminals.rb

Overview

Terminal definitions for the EBNF grammar

Constant Summary collapse

SYMBOL_BASE =
%r(\b[a-zA-Z0-9_\.]+\b)u.freeze
SYMBOL =
%r(#{SYMBOL_BASE}(?!\s*::=))u.freeze
HEX =
%r(\#x\h+)u.freeze
CHAR =
%r([\u0009\u000A\u000D\u0020-\uD7FF\u{10000}-\u{10FFFF}])u.freeze
R_CHAR =
%r([\u0009\u000A\u000D\u0020-\u002C\u002E-\u005C\u005E-\uD7FF\u{10000}-\u{10FFFF}])u.freeze
RANGE =
%r(\[(?:(?:#{R_CHAR}\-#{R_CHAR})|(?:#{HEX}\-#{HEX})|#{R_CHAR}|#{HEX})+-?\](?!\s+#{SYMBOL_BASE}\s*::=))u.freeze
LHS =
%r((?:\[#{SYMBOL_BASE}\])?\s*#{SYMBOL_BASE}\s*::=)u.freeze
O_RANGE =
%r(\[\^(?:(?:#{R_CHAR}\-#{R_CHAR})|(?:#{HEX}\-#{HEX}|#{R_CHAR}|#{HEX}))+-?\])u.freeze
STRING1 =
%r("[\u0009\u000A\u000D\u0020\u0021\u0023-\uD7FF\u{10000}-\u{10FFFF}]*")u.freeze
STRING2 =
%r('[\u0009\u000A\u000D\u0020-\u0026\u0028-\uD7FF\u{10000}-\u{10FFFF}]*')u.freeze
POSTFIX =
%r([?*+])u.freeze
PASS =
%r((
  \s
| (?:(?:\#[^x]|//)[^\n\r]*)
| (?:/\*(?:(?:\*[^/])|[^*])*\*/)
| (?:\(\*(?:(?:\*[^\)])|[^*])*\*\))
)+)xmu.freeze