class YaccShave::Parser
Constants
- Racc_arg
- Racc_debug_parser
- Racc_token_to_s_table
Attributes
filename[R]
lineno[R]
state[RW]
Public Instance Methods
_next_token()
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# File lib/yacc_shave/parser/lexer.rb, line 54 def _next_token text = @ss.peek(1) @lineno += 1 if text == "\n" token = case @state when nil case when (text = @ss.scan(/\d+/)) action { [:INTEGER, text.to_i] } when (text = @ss.scan(/[a-z_?!]+/)) action { [:IDENTIFIER, text]} when (text = @ss.scan(/\+/)) action { [:ADD, text] } when (text = @ss.scan(/\=/)) action { [:ASSIGN, text]} when (text = @ss.scan(/\{/)) action { [:LCBRA, text]} when (text = @ss.scan(/\}/)) action { [:RCBRA, text]} when (text = @ss.scan(/\,/)) action { [:COMMA, text]} when (text = @ss.scan(/\./)) action { [:DOT, text]} when (text = @ss.scan(/\n/)) action { [:NEWLINE, text]} when (text = @ss.scan(/./)) ; else text = @ss.string[@ss.pos .. -1] raise ScanError, "can not match: '" + text + "'" end # if else raise ScanError, "undefined state: '" + state.to_s + "'" end # case state token end
_reduce_none(val, _values)
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reduce 16 omitted
# File lib/yacc_shave/parser/parser.rb, line 226 def _reduce_none(val, _values) val[0] end
action() { || ... }
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# File lib/yacc_shave/parser/lexer.rb, line 23 def action yield end
load_file( filename )
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# File lib/yacc_shave/parser/lexer.rb, line 33 def load_file( filename ) @filename = filename open(filename, "r") do |f| scan_setup(f.read) end end
next_token()
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# File lib/yacc_shave/parser/lexer.rb, line 46 def next_token return if @ss.eos? # skips empty actions until token = _next_token or @ss.eos?; end token end
scan_file( filename )
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# File lib/yacc_shave/parser/lexer.rb, line 40 def scan_file( filename ) load_file(filename) do_parse end
scan_setup(str)
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# File lib/yacc_shave/parser/lexer.rb, line 17 def scan_setup(str) @ss = StringScanner.new(str) @lineno = 1 @state = nil end
scan_str(str)
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# File lib/yacc_shave/parser/lexer.rb, line 27 def scan_str(str) scan_setup(str) do_parse end
Also aliased as: scan
tokenize(code)
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# File lib/yacc_shave/parser/lexer.rb, line 101 def tokenize(code) scan_setup(code) tokens = [] while token = next_token tokens << token end tokens end