Module: EBNF::Terminals

Included in:

Parser

Defined in:

lib/ebnf/terminals.rb

Overview

Terminal definitions for the EBNF grammar

Constant Summary

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