The abstract superclass for SassScript objects.
Many of these methods, especially the ones that correspond to SassScript operations, are designed to be overridden by subclasses which may change the semantics somewhat. The operations listed here are just the defaults.
Compares this object with another.
@param other [Object] The object to compare with @return [Boolean] Whether or not this literal is equivalent to `other`
# File lib/sass/script/literal.rb, line 174 def ==(other) eq(other).to_bool end
@raise [Sass::SyntaxError] if this literal isn't an integer
# File lib/sass/script/literal.rb, line 185 def assert_int!; to_i; end
Returns an empty array.
@return [Array<Node>] empty @see Node#children
# File lib/sass/script/literal.rb, line 34 def children [] end
@see Node#deep_copy
# File lib/sass/script/literal.rb, line 39 def deep_copy dup end
The SassScript `/` operation.
@param other [Literal] The right-hand side of the operator @return [Script::String] A string containing both literals
separated by `"/"`
# File lib/sass/script/literal.rb, line 129 def div(other) Sass::Script::String.new("#{self.to_s}/#{other.to_s}") end
The SassScript `==` operation. **Note that this returns a {Sass::Script::Bool} object, not a Ruby boolean**.
@param other [Literal] The right-hand side of the operator @return [Bool] True if this literal is the same as the other,
false otherwise
# File lib/sass/script/literal.rb, line 67 def eq(other) Sass::Script::Bool.new(self.class == other.class && self.value == other.value) end
@return [String] A readable representation of the literal
# File lib/sass/script/literal.rb, line 161 def inspect value.inspect end
The SassScript `-` operation.
@param other [Literal] The right-hand side of the operator @return [Script::String] A string containing both literals
separated by `"-"`
# File lib/sass/script/literal.rb, line 120 def minus(other) Sass::Script::String.new("#{self.to_s}-#{other.to_s}") end
The SassScript `!=` operation. **Note that this returns a {Sass::Script::Bool} object, not a Ruby boolean**.
@param other [Literal] The right-hand side of the operator @return [Bool] False if this literal is the same as the other,
true otherwise
# File lib/sass/script/literal.rb, line 78 def neq(other) Sass::Script::Bool.new(!eq(other).to_bool) end
Returns whether or not this object is null.
@return [Boolean] `false`
# File lib/sass/script/literal.rb, line 207 def null? false end
Returns the options hash for this node.
@return [{Symbol => Object}] @raise [Sass::SyntaxError] if the options hash hasn't been set.
This should only happen when the literal was created outside of the parser and \{#to\_s} was called on it
# File lib/sass/script/literal.rb, line 49 def options opts = super return opts if opts raise Sass::SyntaxError.new(The #options attribute is not set on this #{self.class}. This error is probably occurring because #to_s was called on this literal within a custom Sass function without first setting the #option attribute.) end
The SassScript `+` operation.
@param other [Literal] The right-hand side of the operator @return [Script::String] A string containing both literals
without any separation
# File lib/sass/script/literal.rb, line 108 def plus(other) if other.is_a?(Sass::Script::String) return Sass::Script::String.new(self.to_s + other.value, other.type) end Sass::Script::String.new(self.to_s + other.to_s) end
The SassScript `=` operation (used for proprietary MS syntax like `alpha(opacity=20)`).
@param other [Literal] The right-hand side of the operator @return [Script::String] A string containing both literals
separated by `"="`
# File lib/sass/script/literal.rb, line 99 def single_eq(other) Sass::Script::String.new("#{self.to_s}=#{other.to_s}") end
Returns the value of this literal as a list. Single literals are considered the same as single-element lists.
@return [Array<Literal>] The of this literal as a list
# File lib/sass/script/literal.rb, line 191 def to_a [self] end
@return [Boolean] `true` (the Ruby boolean value)
# File lib/sass/script/literal.rb, line 166 def to_bool true end
@return [Fixnum] The integer value of this literal @raise [Sass::SyntaxError] if this literal isn't an integer
# File lib/sass/script/literal.rb, line 180 def to_i raise Sass::SyntaxError.new("#{self.inspect} is not an integer.") end
Returns the string representation of this literal as it would be output to the CSS document.
@return [String]
# File lib/sass/script/literal.rb, line 199 def to_s(opts = {}) raise Sass::SyntaxError.new("[BUG] All subclasses of Sass::Literal must implement #to_s.") end
The SassScript unary `/` operation (e.g. `/$a`).
@param other [Literal] The right-hand side of the operator @return [Script::String] A string containing the literal
preceded by `"/"`
# File lib/sass/script/literal.rb, line 156 def unary_div Sass::Script::String.new("/#{self.to_s}") end
The SassScript unary `-` operation (e.g. `-$a`).
@param other [Literal] The right-hand side of the operator @return [Script::String] A string containing the literal
preceded by `"-"`
# File lib/sass/script/literal.rb, line 147 def unary_minus Sass::Script::String.new("-#{self.to_s}") end
The SassScript `==` operation. **Note that this returns a {Sass::Script::Bool} object, not a Ruby boolean**.
@param other [Literal] The right-hand side of the operator @return [Bool] True if this literal is the same as the other,
false otherwise
# File lib/sass/script/literal.rb, line 89 def unary_not Sass::Script::Bool.new(!to_bool) end
The SassScript unary `+` operation (e.g. `+$a`).
@param other [Literal] The right-hand side of the operator @return [Script::String] A string containing the literal
preceded by `"+"`
# File lib/sass/script/literal.rb, line 138 def unary_plus Sass::Script::String.new("+#{self.to_s}") end
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