CodeRay::Scanners::Java

     # File lib/coderay/scanners/java.rb, line 48
 48:     def scan_tokens tokens, options
 49: 
 50:       state = :initial
 51:       string_delimiter = nil
 52:       import_clause = class_name_follows = last_token_dot = false
 53: 
 54:       until eos?
 55: 
 56:         kind = nil
 57:         match = nil
 58:         
 59:         case state
 60: 
 61:         when :initial
 62: 
 63:           if match = scan(/ \s+ | \\\n /)
 64:             tokens << [match, :space]
 65:             next
 66:           
 67:           elsif match = scan(% // [^\n\\]* (?: \\. [^\n\\]* )* | /\* (?: .*? \*/ | .* ) !x)
 68:             tokens << [match, :comment]
 69:             next
 70:           
 71:           elsif import_clause && scan(/ #{IDENT} (?: \. #{IDENT} )* /x)
 72:             kind = :include
 73:           
 74:           elsif match = scan(/ #{IDENT} | \[\] /x)
 75:             kind = IDENT_KIND[match]
 76:             if last_token_dot
 77:               kind = :ident
 78:             elsif class_name_follows
 79:               kind = :class
 80:               class_name_follows = false
 81:             else
 82:               import_clause = true if match == 'import'
 83:               class_name_follows = true if match == 'class' || match == 'interface'
 84:             end
 85:           
 86:           elsif scan(/ \.(?!\d) | [,?:()\[\]}] | -- | \+\+ | && | \|\| | \*\*=? | [-+*\/%^~&|<>=!]=? | <<<?=? | >>>?=? /)
 87:             kind = :operator
 88:           
 89:           elsif scan(/;/)
 90:             import_clause = false
 91:             kind = :operator
 92:           
 93:           elsif scan(/\{/)
 94:             class_name_follows = false
 95:             kind = :operator
 96:           
 97:           elsif check(/[\d.]/)
 98:             if scan(/0[xX][0-9A-Fa-f]+/)
 99:               kind = :hex
100:             elsif scan(/(?>0[0-7]+)(?![89.eEfF])/)
101:               kind = :oct
102:             elsif scan(/\d+[fFdD]|\d*\.\d+(?:[eE][+-]?\d+)?[fFdD]?|\d+[eE][+-]?\d+[fFdD]?/)
103:               kind = :float
104:             elsif scan(/\d+[lL]?/)
105:               kind = :integer
106:             end
107: 
108:           elsif match = scan(/["']/)
109:             tokens << [:open, :string]
110:             state = :string
111:             string_delimiter = match
112:             kind = :delimiter
113: 
114:           elsif scan(/ @ #{IDENT} /x)
115:             kind = :annotation
116: 
117:           else
118:             getch
119:             kind = :error
120: 
121:           end
122: 
123:         when :string
124:           if scan(STRING_CONTENT_PATTERN[string_delimiter])
125:             kind = :content
126:           elsif match = scan(/["'\/]/)
127:             tokens << [match, :delimiter]
128:             tokens << [:close, state]
129:             string_delimiter = nil
130:             state = :initial
131:             next
132:           elsif state == :string && (match = scan(/ \\ (?: #{ESCAPE} | #{UNICODE_ESCAPE} ) /ox))
133:             if string_delimiter == "'" && !(match == "\\\\" || match == "\\'")
134:               kind = :content
135:             else
136:               kind = :char
137:             end
138:           elsif scan(/\\./)
139:             kind = :content
140:           elsif scan(/ \\ | $ /)
141:             tokens << [:close, state]
142:             kind = :error
143:             state = :initial
144:           else
145:             raise_inspect "else case \" reached; %p not handled." % peek(1), tokens
146:           end
147: 
148:         else
149:           raise_inspect 'Unknown state', tokens
150: 
151:         end
152: 
153:         match ||= matched
154:         if $CODERAY_DEBUG and not kind
155:           raise_inspect 'Error token %p in line %d' %
156:             [[match, kind], line], tokens
157:         end
158:         raise_inspect 'Empty token', tokens unless match
159:         
160:         last_token_dot = match == '.'
161:         
162:         tokens << [match, kind]
163: 
164:       end
165: 
166:       if state == :string
167:         tokens << [:close, state]
168:       end
169: 
170:       tokens
171:     end