Class: Sass::Script::Parser

Inherits:
Object show all
Defined in:
lib/sass/script/parser.rb

Overview

The parser for SassScript. It parses a string of code into a tree of Nodes.

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(str, line, offset, filename = nil) ⇒ Parser

Returns a new instance of Parser.

Parameters:

  • str (String, StringScanner) —

    The source text to parse

  • line (Fixnum) —

    The line on which the SassScript appears. Used for error reporting

  • offset (Fixnum) —

    The number of characters in on which the SassScript appears. Used for error reporting

  • filename (String) (defaults to: nil) —

    The name of the file in which the SassScript appears. Used for error reporting



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# File 'lib/sass/script/parser.rb', line 15

def initialize(str, line, offset, filename = nil)
  @filename = filename
  @lexer = Lexer.new(str, line, offset)
end

Class Method Details

.parse(str, line, offset, filename = nil) ⇒ Script::Node

Parses a SassScript expression.

Returns:

See Also:



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# File 'lib/sass/script/parser.rb', line 49

def self.parse(*args)
  new(*args).parse
end

Instance Method Details

#parse ⇒ Script::Node

Parses a SassScript expression.

Returns:

Raises:



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# File 'lib/sass/script/parser.rb', line 37

def parse
  expr = assert_expr :expr
  raise Sass::SyntaxError.new("Unexpected #{@lexer.peek.type} token.") unless @lexer.done?
  expr
end

#parse_interpolated ⇒ Script::Node

Parses a SassScript expression within an interpolated segment (‘#{}`). This means that it stops when it comes across an unmatched `}`, which signals the end of an interpolated segment, it returns rather than throwing an error.

Returns:

Raises:



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# File 'lib/sass/script/parser.rb', line 27

def parse_interpolated
  expr = assert_expr :expr
  assert_tok :end_interpolation
  expr
end