Class: Liquidscript::Scanner::Base

Inherits:
Object
  • Object
show all
Includes:
Enumerable, Lexer
Defined in:
lib/liquidscript/scanner/base.rb,
lib/liquidscript/scanner/base/dsl.rb,
lib/liquidscript/scanner/base/lexer.rb,
lib/liquidscript/scanner/base/builder.rb,
lib/liquidscript/scanner/base/context.rb

Overview

TODO: documentation

Direct Known Subclasses

Liquidscript

Defined Under Namespace

Modules: DSL, Lexer Classes: Builder, Context

Constant Summary collapse

EXIT = 
Object.new.freeze

Class Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Lexer

#error, #lex, #perform_with_context

Constructor Details

#initialize(source) ⇒ Base

Returns a new instance of Base.



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# File 'lib/liquidscript/scanner/base.rb', line 28

def initialize(source)
  @source  = source
  @scanner = StringScanner.new(@source)
  @tokens  = []
  @_scan   = nil
end

Class Attribute Details

.default ⇒ Object

Returns the value of attribute default.



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# File 'lib/liquidscript/scanner/base.rb', line 24

def default
  @default
end

Class Method Details

.contexts ⇒ Object 



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# File 'lib/liquidscript/scanner/base.rb', line 20

def contexts
  @_contexts ||= Set.new
end

Instance Method Details

#column ⇒ Object 



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# File 'lib/liquidscript/scanner/base.rb', line 62

def column
  "(unkown)"
end

#contexts ⇒ Object 



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# File 'lib/liquidscript/scanner/base.rb', line 35

def contexts
  self.class.contexts
end

#default_context ⇒ Object 



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# File 'lib/liquidscript/scanner/base.rb', line 39

def default_context
  self.class.default
end

#each ⇒ Object 



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# File 'lib/liquidscript/scanner/base.rb', line 48

def each
  e = buffer.each

  if block_given?
    e.each(&Proc.new)
  else
    e
  end
end

#emit(token_name, body = nil) ⇒ Object 



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# File 'lib/liquidscript/scanner/base.rb', line 66

def emit(token_name, body = nil)
  @tokens << Token.new(token_name, body, line, column)
end

#inspect ⇒ Object 



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# File 'lib/liquidscript/scanner/base.rb', line 70

def inspect
  "#<#{self.class}:#{'0x%08x' % object_id}>"
end

#line ⇒ Object 



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# File 'lib/liquidscript/scanner/base.rb', line 58

def line
  "(unknown)"
end

#scan ⇒ Object 



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# File 'lib/liquidscript/scanner/base.rb', line 43

def scan
  lex default_context
  self
end