1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
|
module Morpher
class Compiler
class Evaluator
# Emitter for evaluators
class Emitter < Compiler::Emitter
include Registry, Concord.new(:compiler, :evaluator_klass, :node)
# Return output
#
# @return [Evaluator]
#
# @api private
#
def output
validate_node
evaluator
end
memoize :output
# Validate node
#
# @return [undefined]
# if successful
#
# @raise [Error]
# otherwise
#
# @api private
#
abstract_method :validate_node
private :validate_node
# Return evaluator
#
# @return [Evaluator]
#
# @api private
#
abstract_method :evaluator
private :evaluator
# Emitter for nullary non parameterized evaluators
class Nullary < self
register Morpher::Evaluator::Nullary
private
# Return output
#
# @return [Evaluator]
#
# @api private
#
def evaluator
evaluator_klass.new
end
# Validate node
#
# @return [undefined]
# if successful
#
# @raise [Error]
# otherwise
#
# @api private
#
def validate_node
assert_children_amount(0)
end
# Emitter for nullary parameterized evaluators
class Parameterized < self
register Morpher::Evaluator::Nullary::Parameterized
children :param
private
# Return output
#
# @return [Evaluator]
#
# @api private
#
def evaluator
evaluator_klass.new(effective_param)
end
# Return effective param
#
# @return [Object]
#
# @api private
#
def effective_param
if param.kind_of?(AST::Node) && param.type.equal?(:raw) && param.children.length.equal?(1)
param.children.first
else
param
end
end
# Validate node
#
# @return [undefined]
# if successful
#
# @raise [Error]
# otherwise
#
# @api private
#
def validate_node
assert_children_amount(1)
end
end # Paramterized
end # Nullary
# Emitter for unary evaluators
class Unary < self
register Morpher::Evaluator::Unary
children :operand
private
# Return evaluator
#
# @return [Evaluator]
#
# @api private
#
def evaluator
evaluator_klass.new(compiler.call(operand))
end
# Validate node
#
# @return [undefined]
# if successful
#
# @raise [Error]
# otherwise
#
# @api private
#
def validate_node
assert_children_amount(1)
end
end # Unary
# Emitter for unary evaluators
class Binary < self
register Morpher::Evaluator::Binary
children :left, :right
private
# Return evaluator
#
# @return [Evaluator]
#
# @api private
#
def evaluator
evaluator_klass.new(
compiler.call(left),
compiler.call(right)
)
end
# Validate node
#
# @return [undefined]
# if successful
#
# @raise [Error]
# otherwise
#
# @api private
#
def validate_node
assert_children_amount(2)
end
end # Unary
# Emitter for nary evaluators
class Nary < self
register Morpher::Evaluator::Nary
private
# Return evaluator
#
# @return [Evaluator]
#
# @api private
#
def evaluator
evaluator_klass.new(children.map(&compiler.method(:call)))
end
# Validate node
#
# @return [undefined]
# if successful
#
# @raise [Error]
# otherwise
#
# @api private
#
def validate_node
end
end # Nary
end # Emitter
end # Evaluator
end # Compiler
end # Morpher
|
