Racc::GrammarFileParser

     # File lib/racc/grammarfileparser.rb, line 172
172:     def initialize(debug_flags = DebugFlags.new)
173:       @yydebug = debug_flags.parse
174:     end

     # File lib/racc/grammarfileparser.rb, line 168
168:     def GrammarFileParser.parse(src, filename = '-', lineno = 1)
169:       new().parse(src, filename, lineno)
170:     end

     # File lib/racc/grammarfileparser.rb, line 164
164:     def GrammarFileParser.parse_file(filename)
165:       parse(File.read(filename), filename, 1)
166:     end

     # File lib/racc/grammarfileparser.rb, line 176
176:     def parse(src, filename = '-', lineno = 1)
177:       @filename = filename
178:       @lineno = lineno
179:       @scanner = GrammarFileScanner.new(src, @filename)
180:       @scanner.debug = @yydebug
181:       @grammar = Grammar.new
182:       @result = Result.new(@grammar)
183:       @embedded_action_seq = 0
184:       yyparse @scanner, :yylex
185:       parse_user_code
186:       @result.grammar.init
187:       @result
188:     end

     # File lib/racc/grammarfileparser.rb, line 235
235:     def add_rule(target, list, sprec)
236:       if list.last.kind_of?(UserAction)
237:         act = list.pop
238:       else
239:         act = UserAction.empty
240:       end
241:       list.map! {|s| s.kind_of?(UserAction) ? embedded_action(s) : s }
242:       rule = Rule.new(target, list, act)
243:       rule.specified_prec = sprec
244:       @grammar.add rule
245:     end

     # File lib/racc/grammarfileparser.rb, line 211
211:     def add_rule_block(list)
212:       sprec = nil
213:       target = list.shift
214:       case target
215:       when OrMark, UserAction, Prec
216:         raise CompileError, "#{target.lineno}: unexpected symbol #{target.name}"
217:       end
218:       curr = []
219:       list.each do |i|
220:         case i
221:         when OrMark
222:           add_rule target, curr, sprec
223:           curr = []
224:           sprec = nil
225:         when Prec
226:           raise CompileError, "'=<prec>' used twice in one rule" if sprec
227:           sprec = i.symbol
228:         else
229:           curr.push i
230:         end
231:       end
232:       add_rule target, curr, sprec
233:     end

     # File lib/racc/grammarfileparser.rb, line 288
288:     def add_user_code(label, src)
289:       @result.params.send(USER_CODE_LABELS[label]).push src
290:     end

     # File lib/racc/grammarfileparser.rb, line 280
280:     def canonical_label(src)
281:       label = src.to_s.strip.downcase.slice(/\w+/)
282:       unless USER_CODE_LABELS.key?(label)
283:         raise CompileError, "unknown user code type: #{label.inspect}"
284:       end
285:       label
286:     end

     # File lib/racc/grammarfileparser.rb, line 247
247:     def embedded_action(act)
248:       sym = @grammar.intern("@#{@embedded_action_seq += 1}".intern, true)
249:       @grammar.add Rule.new(sym, [], act)
250:       sym
251:     end

     # File lib/racc/grammarfileparser.rb, line 207
207:     def location
208:       "#{@filename}:#{@lineno - 1 + @scanner.lineno}"
209:     end

     # File lib/racc/grammarfileparser.rb, line 192
192:     def next_token
193:       @scanner.scan
194:     end

     # File lib/racc/grammarfileparser.rb, line 196
196:     def on_error(tok, val, _values)
197:       if val.respond_to?(:id2name)
198:         v = val.id2name
199:       elsif val.kind_of?(String)
200:         v = val
201:       else
202:         v = val.inspect
203:       end
204:       raise CompileError, "#{location()}: unexpected token '#{v}'"
205:     end

     # File lib/racc/grammarfileparser.rb, line 257
257:     def parse_user_code
258:       line = @scanner.lineno
259:       _, *blocks = *@scanner.epilogue.split(/^----/)
260:       blocks.each do |block|
261:         header, *body = block.to_a
262:         label0, pathes = *header.sub(/\A-+/, '').split('=', 2)
263:         label = canonical_label(label0)
264:         (pathes ? pathes.strip.split(' ') : []).each do |path|
265:           add_user_code label, SourceText.new(File.read(path), path, 1)
266:         end
267:         add_user_code label, SourceText.new(body.join(''), @filename, line + 1)
268:         line += (1 + body.size)
269:       end
270:     end