Class: Keisan::AST::Variable
Instance Attribute Summary collapse
Instance Method Summary
collapse
Methods inherited from Node
#!, #%, #&, #*, #**, #+, #+@, #-, #-@, #/, #<, #<=, #>, #>=, #^, #and, #coerce, #deep_dup, #equal, #evaluate_assignments, #evaluated, #false?, #not_equal, #or, #simplified, #to_cell, #to_node, #true?, #unbound_functions, #well_defined?, #|, #~
Constructor Details
#initialize(name) ⇒ Variable
Returns a new instance of Variable.
6
7
8
|
# File 'lib/keisan/ast/variable.rb', line 6
def initialize(name)
@name = name
end
|
Instance Attribute Details
#name ⇒ Object
Returns the value of attribute name.
4
5
6
|
# File 'lib/keisan/ast/variable.rb', line 4
def name
@name
end
|
Instance Method Details
#==(other) ⇒ Object
24
25
26
27
28
29
30
31
|
# File 'lib/keisan/ast/variable.rb', line 24
def ==(other)
case other
when Variable
name == other.name
else
false
end
end
|
#differentiate(variable, context = nil) ⇒ Object
70
71
72
73
74
75
76
77
78
|
# File 'lib/keisan/ast/variable.rb', line 70
def differentiate(variable, context = nil)
context ||= Context.new
if name == variable.name && !context.has_variable?(name)
1.to_node
else
0.to_node
end
end
|
#evaluate(context = nil) ⇒ Object
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
# File 'lib/keisan/ast/variable.rb', line 37
def evaluate(context = nil)
context ||= Context.new
if context.has_variable?(name)
variable = variable_node_from_context(context)
if variable.is_a?(Node)
variable.is_a?(Variable) ? variable : variable.evaluate(context)
else
variable
end
else
self
end
end
|
#replace(variable, replacement) ⇒ Object
62
63
64
65
66
67
68
|
# File 'lib/keisan/ast/variable.rb', line 62
def replace(variable, replacement)
if name == variable.name
replacement
else
self
end
end
|
#simplify(context = nil) ⇒ Object
53
54
55
56
57
58
59
60
|
# File 'lib/keisan/ast/variable.rb', line 53
def simplify(context = nil)
context ||= Context.new
if context.has_variable?(name)
context.variable(name).to_node.simplify(context)
else
self
end
end
|
#to_s ⇒ Object
33
34
35
|
# File 'lib/keisan/ast/variable.rb', line 33
def to_s
name.to_s
end
|
#unbound_variables(context = nil) ⇒ Object
19
20
21
22
|
# File 'lib/keisan/ast/variable.rb', line 19
def unbound_variables(context = nil)
context ||= Context.new
context.has_variable?(name) ? Set.new : Set.new([name])
end
|
#value(context = nil) ⇒ Object
14
15
16
17
|
# File 'lib/keisan/ast/variable.rb', line 14
def value(context = nil)
context ||= Context.new
variable_node_from_context(context).value(context)
end
|
#variable_truthy?(context) ⇒ Boolean
10
11
12
|
# File 'lib/keisan/ast/variable.rb', line 10
def variable_truthy?(context)
context.has_variable?(name) && context.variable(name).true?
end
|