Class: Sass::Script::Tree::UnaryOperation

### Home Classes Methods

### In Files

- lib/sass/script/tree/unary_operation.rb

### Parent

Sass::Script::Tree::Node

### Methods

- ::new
- #_perform
- #children
- #deep_copy
- #inspect
- #to_sass

### Class/Module Index

Quicksearch

- Sass
- Sass::BaseEnvironment
- Sass::CSS
- Sass::CacheStores
- Sass::CacheStores::Base
- Sass::CacheStores::Chain
- Sass::CacheStores::Filesystem
- Sass::CacheStores::Memory
- Sass::CacheStores::Null
- Sass::Callbacks
- Sass::Callbacks::InstanceMethods
- Sass::Engine
- Sass::Engine::Line
- Sass::Environment
- Sass::Exec
- Sass::Exec::Base
- Sass::Exec::SassConvert
- Sass::Exec::SassScss
- Sass::Exec::SassScss::Sass::Plugin.compiler
- Sass::Features
- Sass::Importers
- Sass::Importers::Base
- Sass::Importers::Filesystem
- Sass::Logger
- Sass::Logger::Base
- Sass::Logger::LogLevel
- Sass::Logger::LogLevel::ClassMethods
- Sass::Media
- Sass::Media::Query
- Sass::Media::QueryList
- Sass::Plugin
- Sass::Plugin::Compiler
- Sass::Plugin::Configuration
- Sass::Plugin::MerbBootLoader
- Sass::Plugin::Rack
- Sass::Plugin::StalenessChecker
- Sass::ReadOnlyEnvironment
- Sass::Repl
- Sass::SCSS
- Sass::SCSS::CssParser
- Sass::SCSS::Parser
- Sass::SCSS::RX
- Sass::SCSS::ScriptLexer
- Sass::SCSS::ScriptParser
- Sass::SCSS::StaticParser
- Sass::Script
- Sass::Script::CssLexer
- Sass::Script::CssParser
- Sass::Script::Functions
- Sass::Script::Functions::EvaluationContext
- Sass::Script::Lexer
- Sass::Script::Parser
- Sass::Script::Tree
- Sass::Script::Tree::Funcall
- Sass::Script::Tree::Interpolation
- Sass::Script::Tree::ListLiteral
- Sass::Script::Tree::Literal
- Sass::Script::Tree::MapLiteral
- Sass::Script::Tree::Node
- Sass::Script::Tree::Operation
- Sass::Script::Tree::Selector
- Sass::Script::Tree::StringInterpolation
- Sass::Script::Tree::UnaryOperation
- Sass::Script::Tree::Variable
- Sass::Script::Value
- Sass::Script::Value::ArgList
- Sass::Script::Value::Base
- Sass::Script::Value::Bool
- Sass::Script::Value::Color
- Sass::Script::Value::Helpers
- Sass::Script::Value::List
- Sass::Script::Value::Map
- Sass::Script::Value::Null
- Sass::Script::Value::Number
- Sass::Selector
- Sass::Selector::AbstractSequence
- Sass::Selector::Attribute
- Sass::Selector::Class
- Sass::Selector::CommaSequence
- Sass::Selector::Element
- Sass::Selector::Id
- Sass::Selector::Parent
- Sass::Selector::Placeholder
- Sass::Selector::Pseudo
- Sass::Selector::Sequence
- Sass::Selector::Simple
- Sass::Selector::SimpleSequence
- Sass::Selector::Universal
- Sass::SemiGlobalEnvironment
- Sass::Shared
- Sass::Source
- Sass::Source::Map
- Sass::Source::Map::Mapping
- Sass::Source::Position
- Sass::Source::Range
- Sass::Stack
- Sass::Stack::Frame
- Sass::Supports
- Sass::Supports::Condition
- Sass::Supports::Declaration
- Sass::Supports::Interpolation
- Sass::Supports::Negation
- Sass::Supports::Operator
- Sass::SyntaxError
- Sass::Tree
- Sass::Tree::AtRootNode
- Sass::Tree::CharsetNode
- Sass::Tree::CommentNode
- Sass::Tree::ContentNode
- Sass::Tree::CssImportNode
- Sass::Tree::DebugNode
- Sass::Tree::DirectiveNode
- Sass::Tree::EachNode
- Sass::Tree::ErrorNode
- Sass::Tree::ExtendNode
- Sass::Tree::ForNode
- Sass::Tree::FunctionNode
- Sass::Tree::IfNode
- Sass::Tree::ImportNode
- Sass::Tree::KeyframeRuleNode
- Sass::Tree::MediaNode
- Sass::Tree::MixinDefNode
- Sass::Tree::MixinNode
- Sass::Tree::Node
- Sass::Tree::PropNode
- Sass::Tree::ReturnNode
- Sass::Tree::RootNode
- Sass::Tree::RuleNode
- Sass::Tree::SupportsNode
- Sass::Tree::TraceNode
- Sass::Tree::VariableNode
- Sass::Tree::Visitors
- Sass::Tree::Visitors::Base
- Sass::Tree::Visitors::CheckNesting
- Sass::Tree::Visitors::Convert
- Sass::Tree::Visitors::Cssize
- Sass::Tree::Visitors::Cssize::Bubble
- Sass::Tree::Visitors::DeepCopy
- Sass::Tree::Visitors::Extend
- Sass::Tree::Visitors::Perform
- Sass::Tree::Visitors::SetOptions
- Sass::Tree::Visitors::ToCss
- Sass::Tree::WarnNode
- Sass::Tree::WhileNode
- Sass::UnitConversionError
- Sass::Util
- Sass::Util::CrossPlatformRandom
- Sass::Util::MultibyteStringScanner
- Sass::Util::NormalizedMap
- Sass::Util::SubsetMap
- Sass::Util::Test
- Sass::Version
- ActionController
- ActionController::Base
- Object
- OrderedHash

No matching classes.

# Sass::Script::Tree::UnaryOperation

A SassScript parse node representing a unary operation, such as `-$b` or `not true`.

Currently only `-`, `/`, and `not` are unary operators.

### Attributes

operand[R]

@return [Script::Node] The parse-tree node for the object of the operator

operator[R]

@return [Symbol] The operation to perform

### Public Class Methods

new(operand, operator) click to toggle source

@param operand [Script::Node] See {#operand} @param operator [Symbol] See {#operator}

    # File lib/sass/script/tree/unary_operation.rb, line 15
    def initialize(operand, operator)
      @operand = operand
      @operator = operator
      super()
    end

### Public Instance Methods

children() click to toggle source

Returns the operand of the operation.

@return [Array<Node>] @see Node#children

    # File lib/sass/script/tree/unary_operation.rb, line 42
    def children
      [@operand]
    end

deep_copy() click to toggle source

@see Node#deep_copy

    # File lib/sass/script/tree/unary_operation.rb, line 47
    def deep_copy
      node = dup
      node.instance_variable_set('@operand', @operand.deep_copy)
      node
    end

inspect() click to toggle source

@return [String] A human-readable s-expression representation of the operation

    # File lib/sass/script/tree/unary_operation.rb, line 22
    def inspect
      "(#{@operator.inspect} #{@operand.inspect})"
    end

to_sass(opts = {}) click to toggle source

@see Node#to_sass

    # File lib/sass/script/tree/unary_operation.rb, line 27
    def to_sass(opts = {})
      operand = @operand.to_sass(opts)
      if @operand.is_a?(Operation) ||
          (@operator == :minus &&
           (operand =~ Sass::SCSS::RX::IDENT) == 0)
        operand = "(#{@operand.to_sass(opts)})"
      end
      op = Sass::Script::Lexer::OPERATORS_REVERSE[@operator]
      op + (op =~ /[a-z]/ ? " " : "") + operand
    end

### Protected Instance Methods

_perform(environment) click to toggle source

Evaluates the operation.

@param environment [Sass::Environment] The environment in which to evaluate the SassScript @return [Sass::Script::Value] The SassScript object that is the value of the operation @raise [Sass::SyntaxError] if the operation is undefined for the operand

    # File lib/sass/script/tree/unary_operation.rb, line 60
    def _perform(environment)
      operator = "unary_#{@operator}"
      value = @operand.perform(environment)
      value.send(operator)
    rescue NoMethodError => e
      raise e unless e.name.to_s == operator.to_s
      raise Sass::SyntaxError.new("Undefined unary operation: \"#{@operator} #{value}\".")
    end

[Validate]

Generated with the Darkfish Rdoc Generator 2.