module Dot

Defined in:

Constant Summary

Grammar = Pegmatite::DSL.define do comment_char = range(' ', 1114111_u32) comment = (((char('#')) >> ((~(char('\n'))) >> comment_char).maybe.repeat) >> (char('\n'))).named(:comment, false) multi_comment_char = (~(str("*/"))) >> (((comment_char | (char('\n'))) | (char('\r'))) | (char('\t'))) multi_comment = (((((char('/')) >> (char('*'))) >> multi_comment_char.maybe.repeat) >> (char('*'))) >> (char('/'))).named(:multi_comment, false) line_break = (char('\r')) | ((char('\n')).named(:line_break, false)) whitespace = ((char(' ')) | (char('\t'))).named(:whitespace, false) s = (((multi_comment | comment) | whitespace) | line_break).repeat.named(:ignored, false) digit19 = range('1', '9') digit = range('0', '9') digits = digit.repeat(1) int = (((((char('-')) >> digit19) >> digits) | ((char('-')) >> digit)) | (digit19 >> digits)) | digit frac = (char('.')) >> digits exp = (((char('e')) | (char('E'))) >> ((char('+')) | (char('-'))).maybe) >> digits numeric = (int >> frac.maybe) >> exp.maybe numeric_str = ((char('"')) >> numeric) >> (char('"')) number = (numeric | numeric_str).named(:number) string_char = ((((((((str("\\\"")) | (str("\\\\"))) | (str("\\|"))) | (str("\\b"))) | (str("\\f"))) | (str("\\n"))) | (str("\\r"))) | (str("\\t"))) | (((~(char('"'))) >> (~(char('\\')))) >> (range(' ', 1114111_u32))) string = ((char('"')) >> (string_char.repeat.named(:string))) >> (char('"')) identifier = ((((range('a', 'z')) | (range('A', 'Z'))) | (char('_'))) >> ((((((range('a', 'z')) | (range('A', 'Z'))) | digits) | (char('_'))) | (char('-'))) | (char('.'))).repeat).named(:identifier) t_null = (str("null")).named(:null) t_true = ((str("true")) | (str("\"true\""))).named(:true) t_false = ((str("false")) | (str("\"false\""))).named(:false) bool = t_true | t_false value = (((t_null | bool) | number) | identifier) | string pair = (((identifier >> s) >> (char('='))) >> s) >> value pair_id = (((identifier >> s) >> (char('='))) >> s) >> identifier ass = (pair | pair_id).named(:assignment) subgraph = ((str("graph")) | (str("digraph"))).named(:graph_type) a_list = ((((pair_id >> (char(','))) >> (pair_id >> (char(','))).maybe.repeat) | ((pair >> (char(','))) >> (pair >> (char(','))).maybe.repeat)) | pair_id) | pair attr_list = (((identifier >> s) >> (char('['))) >> a_list.maybe.repeat) >> (char(']')) node_statement = (((char('[')) >> attr_list) >> (char(']'))).named(:node_statement) edgeop = ((char('-')) >> (char('>'))) | ((char('-')) >> (char('-'))) edgeRHS = ((edgeop >> s.maybe) >> identifier) >> (((s >> edgeop) >> s.maybe) >> identifier).maybe.repeat edge_statement = (((((((identifier >> s) >> edgeRHS) >> s) >> (char('['))) >> attr_list) >> (char(']'))) | ((identifier >> s) >> edgeRHS)).named(:edge_statement) attr_statement = ((identifier >> s) >> attr_list).named(:attr_statement) graph_name = identifier.named(:graph_name) statement = s.maybe.repeat >> ((((node_statement | edge_statement) | attr_statement) | ass).named(:statement)) statement_list = (((statement >> (char(';'))) >> s.maybe) >> ((statement >> (char(';'))) >> s.maybe).maybe.repeat) | ((statement >> (char(';'))) >> s.maybe) graph = (((((((subgraph >> s) >> graph_name) >> s.maybe) >> (char('{'))) >> s.maybe.repeat) >> statement_list) >> (char('}'))).named(:block) ((s >> graph) >> s).then_eof end