Class: Keisan::AST::CellAssignment
- Inherits:
-
Object
- Object
- Keisan::AST::CellAssignment
- Defined in:
- lib/keisan/ast/cell_assignment.rb
Instance Attribute Summary collapse
-
#assignment ⇒ Object
readonly
Returns the value of attribute assignment.
-
#context ⇒ Object
readonly
Returns the value of attribute context.
-
#lhs ⇒ Object
readonly
Returns the value of attribute lhs.
-
#rhs ⇒ Object
readonly
Returns the value of attribute rhs.
Instance Method Summary collapse
- #evaluate ⇒ Object
-
#initialize(assignment, context, lhs, rhs) ⇒ CellAssignment
constructor
A new instance of CellAssignment.
Constructor Details
#initialize(assignment, context, lhs, rhs) ⇒ CellAssignment
Returns a new instance of CellAssignment.
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# File 'lib/keisan/ast/cell_assignment.rb', line 6 def initialize(assignment, context, lhs, rhs) @assignment = assignment @context = context @lhs = lhs @rhs = rhs end |
Instance Attribute Details
#assignment ⇒ Object (readonly)
Returns the value of attribute assignment.
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# File 'lib/keisan/ast/cell_assignment.rb', line 4 def assignment @assignment end |
#context ⇒ Object (readonly)
Returns the value of attribute context.
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# File 'lib/keisan/ast/cell_assignment.rb', line 4 def context @context end |
#lhs ⇒ Object (readonly)
Returns the value of attribute lhs.
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# File 'lib/keisan/ast/cell_assignment.rb', line 4 def lhs @lhs end |
#rhs ⇒ Object (readonly)
Returns the value of attribute rhs.
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# File 'lib/keisan/ast/cell_assignment.rb', line 4 def rhs @rhs end |
Instance Method Details
#evaluate ⇒ Object
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# File 'lib/keisan/ast/cell_assignment.rb', line 13 def evaluate lhs = lhs_evaluate_and_check_modifiable unless lhs.is_a?(Cell) raise Exceptions::InvalidExpression.new("Unhandled left hand side #{lhs} in assignment") end case assignment.compound_operator when :"||" evaluate_cell_or_assignment(context, lhs, rhs) when :"&&" evaluate_cell_and_assignment(context, lhs, rhs) else evaluate_cell_non_logical_assignment(context, lhs, rhs) end end |