Sha256: 9c04ab0b6a839626661d5d6e6ba6db52d883186a3e661613c5a801daa866068c
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Size: 548 Bytes
Versions: 8
Compression:
Stored size: 548 Bytes
Contents
# Purpose: to demonstrate how to build and render a parse tree for JSON
# language
require_relative 'calc_lexer'
require_relative 'calc_grammar'
# A parser for arithmetic expressions
class CalcParser < Rley::Parser::GFGEarleyParser
attr_reader(:source_file)
# Constructor
def initialize()
# Builder the Earley parser with the calculator grammar
super(CalcGrammar)
end
def parse_expression(aText)
lexer = CalcLexer.new(aText, self.grammar)
result = parse(lexer.tokens)
return result
end
end # class
# End of file
Version data entries
8 entries across 8 versions & 1 rubygems