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