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module CodeRay
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module Scanners
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  # Scanner for the Delphi language (Object Pascal).
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  #
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  # Alias: +pascal+
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  class Delphi < Scanner
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    register_for :delphi
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    file_extension 'pas'
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    KEYWORDS = [
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      'and', 'array', 'as', 'at', 'asm', 'at', 'begin', 'case', 'class',
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      'const', 'constructor', 'destructor', 'dispinterface', 'div', 'do',
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      'downto', 'else', 'end', 'except', 'exports', 'file', 'finalization',
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      'finally', 'for', 'function', 'goto', 'if', 'implementation', 'in',
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      'inherited', 'initialization', 'inline', 'interface', 'is', 'label',
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      'library', 'mod', 'nil', 'not', 'object', 'of', 'or', 'out', 'packed',
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      'procedure', 'program', 'property', 'raise', 'record', 'repeat',
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      'resourcestring', 'set', 'shl', 'shr', 'string', 'then', 'threadvar',
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      'to', 'try', 'type', 'unit', 'until', 'uses', 'var', 'while', 'with',
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      'xor', 'on',
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    ]  # :nodoc:
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    DIRECTIVES = [
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      'absolute', 'abstract', 'assembler', 'at', 'automated', 'cdecl',
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      'contains', 'deprecated', 'dispid', 'dynamic', 'export',
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      'external', 'far', 'forward', 'implements', 'local',
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      'near', 'nodefault', 'on', 'overload', 'override',
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      'package', 'pascal', 'platform', 'private', 'protected', 'public',
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      'published', 'read', 'readonly', 'register', 'reintroduce',
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      'requires', 'resident', 'safecall', 'stdcall', 'stored', 'varargs',
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      'virtual', 'write', 'writeonly',
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    ]  # :nodoc:
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    IDENT_KIND = WordList::CaseIgnoring.new(:ident).
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      add(KEYWORDS, :keyword).
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      add(DIRECTIVES, :directive)  # :nodoc:
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    NAME_FOLLOWS = WordList::CaseIgnoring.new(false).
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      add(%w(procedure function .))  # :nodoc:
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  protected
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    def scan_tokens encoder, options
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      state = :initial
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      last_token = ''
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      until eos?
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        if state == :initial
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          if match = scan(/ \s+ /x)
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            encoder.text_token match, :space
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            next
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          elsif match = scan(%r! \{ \$ [^}]* \}? | \(\* \$ (?: .*? \*\) | .* ) !mx)
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            encoder.text_token match, :preprocessor
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            next
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          elsif match = scan(%r! // [^\n]* | \{ [^}]* \}? | \(\* (?: .*? \*\) | .* ) !mx)
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            encoder.text_token match, :comment
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            next
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          elsif match = scan(/ <[>=]? | >=? | :=? | [-+=*\/;,@\^|\(\)\[\]] | \.\. /x)
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            encoder.text_token match, :operator
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          elsif match = scan(/\./)
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            encoder.text_token match, :operator
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            next if last_token == 'end'
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          elsif match = scan(/ [A-Za-z_][A-Za-z_0-9]* /x)
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            encoder.text_token match, NAME_FOLLOWS[last_token] ? :ident : IDENT_KIND[match]
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          elsif match = skip(/ ' ( [^\n']|'' ) (?:'|$) /x)
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            encoder.begin_group :char
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            encoder.text_token "'", :delimiter
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            encoder.text_token self[1], :content
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            encoder.text_token "'", :delimiter
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            encoder.end_group :char
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            next
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          elsif match = scan(/ ' /x)
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            encoder.begin_group :string
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            encoder.text_token match, :delimiter
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            state = :string
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          elsif match = scan(/ \# (?: \d+ | \$[0-9A-Fa-f]+ ) /x)
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            encoder.text_token match, :char
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          elsif match = scan(/ \$ [0-9A-Fa-f]+ /x)
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            encoder.text_token match, :hex
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          elsif match = scan(/ (?: \d+ ) (?![eE]|\.[^.]) /x)
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            encoder.text_token match, :integer
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          elsif match = scan(/ \d+ (?: \.\d+ (?: [eE][+-]? \d+ )? | [eE][+-]? \d+ ) /x)
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            encoder.text_token match, :float
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          else
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            encoder.text_token getch, :error
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            next
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          end
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        elsif state == :string
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          if match = scan(/[^\n']+/)
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            encoder.text_token match, :content
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          elsif match = scan(/''/)
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            encoder.text_token match, :char
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          elsif match = scan(/'/)
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            encoder.text_token match, :delimiter
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            encoder.end_group :string
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            state = :initial
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            next
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          elsif match = scan(/\n/)
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            encoder.end_group :string
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            encoder.text_token match, :space
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            state = :initial
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          else
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            raise "else case \' reached; %p not handled." % peek(1), encoder
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          end
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        else
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          raise 'else-case reached', encoder
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        end
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        last_token = match
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      end
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      if state == :string
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        encoder.end_group state
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      end
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      encoder
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    end
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  end


    		
  

  

    
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end


    		
  

  

    
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end