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

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Lexer

#error, #lex, #perform_with_context

Constructor Details

#initialize(source, file = nil) ⇒ Base

Returns a new instance of Base.



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

def initialize(source, file = nil)
  @source   = source
  @scanner  = StringScanner.new(@source)
  @tokens   = []
  @_scan    = nil
  @metadata = {}

  if !file and source.respond_to?(:to_path)
    file = source.to_path
  end

  @metadata[:file] = file || "<none>"
end

Instance Attribute Details

#metadata ⇒ Object

Returns the value of attribute metadata.



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# File 'lib/liquidscript/scanner/base.rb', line 18

def metadata
  @metadata
end

Instance Method Details

#column ⇒ Object 



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# File 'lib/liquidscript/scanner/base.rb', line 65

def column
  "(unkown)"
end

#contexts ⇒ Object 



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# File 'lib/liquidscript/scanner/base.rb', line 38

def contexts
  self.class.contexts
end

#default_context ⇒ Object 



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# File 'lib/liquidscript/scanner/base.rb', line 42

def default_context
  self.class.default
end

#each ⇒ Object 



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# File 'lib/liquidscript/scanner/base.rb', line 51

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 69

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

#file ⇒ Object 



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# File 'lib/liquidscript/scanner/base.rb', line 34

def file
  @metadata[:file]
end

#inspect ⇒ Object 



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# File 'lib/liquidscript/scanner/base.rb', line 73

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

#line ⇒ Object 



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# File 'lib/liquidscript/scanner/base.rb', line 61

def line
  "(unknown)"
end

#scan ⇒ Object 



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# File 'lib/liquidscript/scanner/base.rb', line 46

def scan
  lex default_context
  self
end