class Marpa::Parser

• Marpa::Parser
• Reference
• Object

Defined in:

Constructors

• .new

Instance Method Summary

• #build_meta_grammar(actions)
• #compile(grammar : String)

  Convenience method to expose internals of grammar, lexer, symbols, rules, etc.

• #discard : Array(String)
• #discard=(discard : Array(String))
• #discards : Array({String, String})
• #discards=(discards : Array(Tuple(String, String)))
• #expected : Array(String)
• #expected=(expected : Array(String))
• #grammar : LibMarpa::MarpaGrammar
• #grammar=(grammar : LibMarpa::MarpaGrammar)
• #input : String
• #input=(input : String)
• #lexemes : Hash(Int32, Hash(String, String))
• #lexemes=(lexemes : Hash(Int32, Hash(String, String)))
• #lexer : Hash(String, Regex)
• #lexer=(lexer : Hash(String, Regex))
• #matches : Array({String, String})
• #matches=(matches : Array(Tuple(String, String)))
• #parse(input : String, grammar : String, actions : Actions = Actions.new, events : Events = Events.new)

  Parse #input given #grammar in BNF format.

• #parse(input : String, builder : Builder, actions : Actions = Actions.new, events : Events = Events.new)

  Internal method used to parse the given input given computed grammar, Notated here as builder

• #position : Int32
• #position=(position : Int32)
• #recce : LibMarpa::MarpaRecognizer
• #recce=(recce : LibMarpa::MarpaRecognizer)
• #rules : Hash(Int32, Hash(String, String))
• #rules=(rules : Hash(Int32, Hash(String, String)))
• #symbols : Hash(String, Int32)
• #symbols=(symbols : Hash(String, Int32))
• #values : Hash(Int32, String)
• #values=(values : Hash(Int32, String))

Constructor Detail

Instance Method Detail

parser = Marpa::Parser.new
grammar = <<-'END_BNF'
:start ::= A
A ::= a
a ~ 'a'
END_BNF
input = "a"
grammar = parser.compile(grammar)
parser.parse(input, grammar) # => ["a"]