Class: Sass::Script::Funcall

Inherits:
Node show all
Defined in:
lib/sass/script/funcall.rb

Overview

A SassScript parse node representing a function call.

A function call either calls one of the functions in Functions, or if no function with the given name exists it returns a string representation of the function call.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, args) ⇒ Funcall

Returns a new instance of Funcall.

Parameters:



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# File 'lib/sass/script/funcall.rb', line 22

def initialize(name, args)
  @name = name
  @args = args
end

Instance Attribute Details

#args ⇒ Array<Script::Node> (readonly)

The arguments to the function.

Returns:



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# File 'lib/sass/script/funcall.rb', line 18

def args
  @args
end

#name ⇒ String (readonly)

The name of the function.

Returns:



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# File 'lib/sass/script/funcall.rb', line 13

def name
  @name
end

Instance Method Details

#inspect ⇒ String

Returns A string representation of the function call.

Returns:

  • (String) —

    A string representation of the function call



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# File 'lib/sass/script/funcall.rb', line 28

def inspect
  "#{name}(#{args.map {|a| a.inspect}.join(', ')})"
end

#perform(environment) ⇒ Literal

Evaluates the function call.

Parameters:

  • environment (Sass::Environment) —

    The environment in which to evaluate the SassScript

Returns:

  • (Literal) —

    The SassScript object that is the value of the function call

Raises:



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

def perform(environment)
  args = self.args.map {|a| a.perform(environment)}
  unless Haml::Util.has?(:public_instance_method, Functions, name) && name !~ /^__/
    return Script::String.new("#{name}(#{args.map {|a| a.perform(environment)}.join(', ')})")
  end

  return Functions::EvaluationContext.new(environment.options).send(name, *args)
rescue ArgumentError => e
  raise e unless e.backtrace.first =~ /:in `(block in )?(#{name}|perform)'$/
  raise Sass::SyntaxError.new("#{e.message} for `#{name}'")
end