Feature #6530 ยป 0001-Improve-racc-documentation-coverage.patch
| lib/racc/parser.rb | ||
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#
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unless defined?(NotImplementedError)
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NotImplementedError = NotImplementError
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NotImplementedError = NotImplementError # :nodoc:
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end
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module Racc
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| ... | ... | |
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ParseError = Racc::ParseError
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end
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# Racc is a LALR(1) parser generator.
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# It is written in Ruby itself, and generates Ruby program.
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#
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# See Racc::Parser for the functions available to your parser.
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#
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# NOTE: Ruby 1.8.x comes with Racc runtime module. You
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# can run your parsers generated by racc 1.4.x out of the
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# box.
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module Racc
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unless defined?(Racc_No_Extentions)
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Racc_No_Extentions = false
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Racc_No_Extentions = false # :nodoc:
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end
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class Parser
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Racc_Runtime_Version = '1.4.6'
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Racc_Runtime_Revision = %w$originalRevision: 1.8 $[1]
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Racc_Runtime_Version = '1.4.6' # :nodoc:
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Racc_Runtime_Revision = %w$originalRevision: 1.8 $[1] # :nodoc:
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Racc_Runtime_Core_Version_R = '1.4.6'
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Racc_Runtime_Core_Revision_R = %w$originalRevision: 1.8 $[1]
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Racc_Runtime_Core_Version_R = '1.4.6' # :nodoc:
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Racc_Runtime_Core_Revision_R = %w$originalRevision: 1.8 $[1] # :nodoc:
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begin
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require 'racc/cparse'
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# Racc_Runtime_Core_Version_C = (defined in extention)
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| ... | ... | |
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raise LoadError, 'selecting ruby version of racc runtime core'
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end
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Racc_Main_Parsing_Routine = :_racc_do_parse_c
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Racc_YY_Parse_Method = :_racc_yyparse_c
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Racc_Runtime_Core_Version = Racc_Runtime_Core_Version_C
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Racc_Runtime_Core_Revision = Racc_Runtime_Core_Revision_C
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Racc_Runtime_Type = 'c'
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Racc_Main_Parsing_Routine = :_racc_do_parse_c # :nodoc:
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Racc_YY_Parse_Method = :_racc_yyparse_c # :nodoc:
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Racc_Runtime_Core_Version = Racc_Runtime_Core_Version_C # :nodoc:
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Racc_Runtime_Core_Revision = Racc_Runtime_Core_Revision_C # :nodoc:
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Racc_Runtime_Type = 'c' # :nodoc:
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rescue LoadError
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Racc_Main_Parsing_Routine = :_racc_do_parse_rb
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Racc_YY_Parse_Method = :_racc_yyparse_rb
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| ... | ... | |
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Racc_Runtime_Type = 'ruby'
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end
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def Parser.racc_runtime_type
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def Parser.racc_runtime_type # :nodoc:
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Racc_Runtime_Type
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end
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| ... | ... | |
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###
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class_eval %{
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def do_parse
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# The entry point of parser. This method is used with #next_token.
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# If Racc wants to get token (and its value), calls next_token.
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#
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# Example:
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# ---- inner
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# def parse
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# @q = [[1,1],
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# [2,2],
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# [3,3],
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# [false, '$']]
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# do_parse
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# end
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#
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# def next_token
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# @q.shift
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# end
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# --
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def do_parse # :doc:
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#{Racc_Main_Parsing_Routine}(_racc_setup(), false)
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end
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}
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def next_token
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# The method to fetch next token. If you use #do_parse method,
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# you must implement #next_token. The format of return value is
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# [TOKEN_SYMBOL, VALUE]. token-symbol is represented by Ruby's symbol
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# by default, e.g. :IDENT for 'IDENT'. ";" (String) for ';'.
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#
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# The final symbol (End of file) must be false.
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def next_token # :doc:
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raise NotImplementedError, "#{self.class}\#next_token is not defined"
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end
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| ... | ... | |
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###
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class_eval %{
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def yyparse(recv, mid)
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# The another entry point of parser.
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# If you use this method, you must implement RECEIVER#METHOD_ID method.
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#
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# RECEIVER#METHOD_ID is a method to get next token.
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# It must 'yield's token, which format is [TOKEN-SYMBOL, VALUE].
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def yyparse(recv, mid) # :doc:
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#{Racc_YY_Parse_Method}(recv, mid, _racc_setup(), true)
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end
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}
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| ... | ... | |
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goto_default[k1]
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end
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def on_error(t, val, vstack)
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# This method is called when parse error is found.
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#
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# ERROR_TOKEN_ID is an internal ID of token which caused error.
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# You can get string replesentation of this ID by calling
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# #token_to_str.
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#
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# ERROR_VALUE is a value of error token.
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#
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# value_stack is a stack of symbol values.
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# DO NOT MODIFY this object.
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#
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# This method raises ParseError by default.
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#
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# If this method returns, parsers enter "error recovering mode".
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def on_error(t, val, vstack) # :doc:
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raise ParseError, sprintf("\nparse error on value %s (%s)",
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val.inspect, token_to_str(t) || '?')
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end
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def yyerror
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# Enter error recovering mode.
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# This method does not call #on_error.
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def yyerror # :doc:
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throw :racc_jump, 1
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end
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def yyaccept
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# Exit parser.
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# Return value is Symbol_Value_Stack[0].
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def yyaccept # :doc:
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throw :racc_jump, 2
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end
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def yyerrok
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# Leave error recovering mode.
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def yyerrok # :doc:
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@racc_error_status = 0
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end
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| ... | ... | |
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# for debugging output
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#
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def racc_read_token(t, tok, val)
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def racc_read_token(t, tok, val) # :doc:
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@racc_debug_out.print 'read '
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@racc_debug_out.print tok.inspect, '(', racc_token2str(t), ') '
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@racc_debug_out.puts val.inspect
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@racc_debug_out.puts
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end
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def racc_shift(tok, tstack, vstack)
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def racc_shift(tok, tstack, vstack) # :doc:
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@racc_debug_out.puts "shift #{racc_token2str tok}"
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racc_print_stacks tstack, vstack
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@racc_debug_out.puts
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end
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def racc_reduce(toks, sim, tstack, vstack)
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def racc_reduce(toks, sim, tstack, vstack) # :doc:
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out = @racc_debug_out
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out.print 'reduce '
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if toks.empty?
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| ... | ... | |
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@racc_debug_out.puts
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end
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def racc_accept
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def racc_accept # :doc:
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@racc_debug_out.puts 'accept'
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@racc_debug_out.puts
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end
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def racc_e_pop(state, tstack, vstack)
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def racc_e_pop(state, tstack, vstack) # :doc:
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@racc_debug_out.puts 'error recovering mode: pop token'
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racc_print_states state
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racc_print_stacks tstack, vstack
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@racc_debug_out.puts
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end
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def racc_next_state(curstate, state)
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def racc_next_state(curstate, state) # :doc:
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@racc_debug_out.puts "goto #{curstate}"
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racc_print_states state
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@racc_debug_out.puts
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end
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def racc_print_stacks(t, v)
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def racc_print_stacks(t, v) # :doc:
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out = @racc_debug_out
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out.print ' ['
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t.each_index do |i|
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out.puts ' ]'
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end
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def racc_print_states(s)
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def racc_print_states(s) # :doc:
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out = @racc_debug_out
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out.print ' ['
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s.each {|st| out.print ' ', st }
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out.puts ' ]'
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end
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def racc_token2str(tok)
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def racc_token2str(tok) # :doc:
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self.class::Racc_token_to_s_table[tok] or
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raise "[Racc Bug] can't convert token #{tok} to string"
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end
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def token_to_str(t)
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# Convert internal ID of token symbol to the string.
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def token_to_str(t) # :doc:
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self.class::Racc_token_to_s_table[t]
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end
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