Module: Liquidscript::Scanner::Base::Lexer

Included in:
Liquidscript::Scanner::Base
Defined in:
lib/liquidscript/scanner/base/lexer.rb

Instance Method Summary collapse

Instance Method Details

#error(scanner = @scanner, context = @context, file = ) ⇒ Object

Raises:



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

def error(scanner = @scanner, context = @context,
          file = @metadata[:file])
  raise SyntaxError, "Unexpected " +
    "#{scanner.matched}#{scanner.peek(2)}".inspect +
    " (line: #{line}, column: #{column}, file: #{file})"
end

#lex(*args) ⇒ Object 



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# File 'lib/liquidscript/scanner/base/lexer.rb', line 16

def lex(*args)
  args.flatten!
  to_lex = args.pop

  context, body = if to_lex.is_a? Hash
    to_lex.to_a.first
  else
    [to_lex, nil]
  end

  scanner = if body
    StringScanner.new(body)
  else
    @scanner
  end
  out = []

  context = find_context(context)
  instance_exec(*args, &context.init)

  while scanner.rest? && out.last != EXIT
    out << perform_with_context(context, scanner)
  end

  out
end

#perform_with_context(context, scanner = @scanner) ⇒ Object 



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# File 'lib/liquidscript/scanner/base/lexer.rb', line 6

def perform_with_context(context, scanner = @scanner)
  key, value = context.find_matcher(scanner)

  if value.nil? && scanner.rest?
    error scanner, context
  end

  normalize_action key, value, scanner if scanner.rest?
end