Class: Keisan::AST::Assignment
Constant Summary
Constants inherited
from Operator
Operator::ARITIES, Operator::ARITY_PRIORITY_ASSOCIATIVITY, Operator::ASSOCIATIVITIES, Operator::ASSOCIATIVITY_OF_PRIORITY, Operator::PRIORITIES
Instance Attribute Summary collapse
Attributes inherited from Parent
#children
Class Method Summary
collapse
Instance Method Summary
collapse
Methods inherited from Operator
arity, #arity, associativity, #associativity, associativity_of_priority, #blank_value, #priority, priority, #to_s, #value
Methods inherited from Parent
#==, #deep_dup, #freeze, #replace, #traverse
Methods inherited from Node
#!, #%, #&, #*, #**, #+, #+@, #-, #-@, #/, #<, #<<, #<=, #>, #>=, #>>, #^, #and, #coerce, #contains_a?, #deep_dup, #differentiate, #differentiated, #equal, #evaluated, #false?, #not_equal, #or, #replace, #replaced, #simplified, #to_cell, #to_node, #traverse, #true?, #value, #well_defined?, #|, #~
Constructor Details
#initialize(children = [], parsing_operators = [], local: false, compound_operator: nil) ⇒ Assignment
Returns a new instance of Assignment.
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# File 'lib/keisan/ast/assignment.rb', line 10
def initialize(children = [], parsing_operators = [], local: false, compound_operator: nil)
super(children, parsing_operators)
@local = local
@compound_operator = compound_operator
end
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Instance Attribute Details
#compound_operator ⇒ Object
Returns the value of attribute compound_operator.
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# File 'lib/keisan/ast/assignment.rb', line 8
def compound_operator
@compound_operator
end
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#local ⇒ Object
Returns the value of attribute local.
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# File 'lib/keisan/ast/assignment.rb', line 8
def local
@local
end
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Class Method Details
.symbol ⇒ Object
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# File 'lib/keisan/ast/assignment.rb', line 16
def self.symbol
:"="
end
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Instance Method Details
#evaluate(context = nil) ⇒ Object
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# File 'lib/keisan/ast/assignment.rb', line 24
def evaluate(context = nil)
context ||= Context.new
lhs = children.first
rhs = children.last
if is_variable_definition?
evaluate_variable_assignment(context, lhs, rhs)
elsif is_function_definition?
evaluate_function_assignment(context, lhs, rhs)
else
evaluate_cell_assignment(context, lhs, rhs)
end
end
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#evaluate_assignments(context = nil) ⇒ Object
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# File 'lib/keisan/ast/assignment.rb', line 44
def evaluate_assignments(context = nil)
evaluate(context)
end
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#is_function_definition? ⇒ Boolean
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# File 'lib/keisan/ast/assignment.rb', line 70
def is_function_definition?
children.first.is_a?(Function)
end
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#is_variable_definition? ⇒ Boolean
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# File 'lib/keisan/ast/assignment.rb', line 66
def is_variable_definition?
children.first.is_a?(Variable)
end
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#simplify(context = nil) ⇒ Object
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# File 'lib/keisan/ast/assignment.rb', line 40
def simplify(context = nil)
evaluate(context)
end
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#symbol ⇒ Object
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# File 'lib/keisan/ast/assignment.rb', line 20
def symbol
:"#{compound_operator}="
end
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#unbound_functions(context = nil) ⇒ Object
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# File 'lib/keisan/ast/assignment.rb', line 57
def unbound_functions(context = nil)
functions = super(context)
if is_function_definition?
functions.delete(children.first.name)
else
functions
end
end
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#unbound_variables(context = nil) ⇒ Object
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# File 'lib/keisan/ast/assignment.rb', line 48
def unbound_variables(context = nil)
variables = super(context)
if is_variable_definition?
variables.delete(children.first.name)
else
variables
end
end
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