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
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
|
module
imports
signatures/Poosl-sig
signatures/Common-sig
statics-opt
statics-names
statics-typing
rules // === Declarations =======
maps okDeclarationOptComma(*, list(*))
: scope * DeclarationOptComma
okDeclarationOptComma(, DeclarationWithComma(IDList(names), type)) :- declareVariables(s, names, typeOfDataClass(s, type)).
okDeclarationOptComma(, DeclarationWithoutComma(IDList(names), type)) :- declareVariables(s, names, typeOfDataClass(s, type)).
maps okDeclaration(*, list(*)) = list(*)
: scope * Declaration -> list(TypeDataClass)
okDeclaration(s, Declaration(IDList(names), type)) = okVariablesWithTypes(s, names, typeOfDataClass(s, type)).
okVariablesWithTypes maps okVariableWithType(*, list(*), *) = list(*)
: scope * string * TypeDataClass -> TypeDataClass
okVariableWithType(s, n, T) = T :- declareVariable(s, n, T).
rules // === Statements =======
: scope * ProcessMethodCall
okProcessMethodCall(, ProcessMethodCall(name, ExpressionList(), VariableList())) :-
{} argInTypes == okExpressions(s, TypeDataClassRoot(), exprs),
{} argOutTypes == typeOfVariables(s, vars),
{ } TypeProcessMethod(methodInTypes, methodOutTypes) == typeOfProcessMethod(s, name, lengthDataClasses(argInTypes), lengthDataClasses(argOutTypes)),
try { compatibleTypes(argInTypes, methodInTypes) } | warning $[Incompatible type] @exprs,
try { compatibleTypes(argOutTypes, methodOutTypes) } | warning $[Incompatible type] @vars.
okStatements maps okStatement(*, list(*))
: scope * Statement
okStatement(s, StatementSequence(statements)) :-
okSingleStatements(s, statements).
okAndStatements maps okAndStatement(*, list(*))
: scope * AndStatement
okAndStatement(s, AndStatement(stat)) :- okStatement(s, stat).
okOrStatements maps okOrStatement(*, list(*))
: scope * OrStatement
okOrStatement(s, OrStatement(stat)) :- okStatement(s, stat).
okSingleStatements maps okSingleStatement(*, list(*))
: scope * SingleStatement
okSingleStatement(, AbortStatement(stat1, stat2)) :-
okStatement(s, stat1),
okSingleStatement(s, stat2).
okSingleStatement(s, DelayStatement(expr)) :-
okSingleExpression(s, TypeDataClassRoot(), expr) == _.
okSingleStatement(, GuardedStatement(expr, stat)) :-
okExpression(s, TypeDataClassRoot(), expr) == _,
okSingleStatement(s, stat).
okSingleStatement(, InterruptStatement(stat1, stat2)) :-
okStatement(s, stat1),
okSingleStatement(s, stat2).
okSingleStatement(, ParStatement(stat, andStats)) :-
okStatement(s, stat),
okAndStatements(s, andStats).
okSingleStatement(s, ProcessMethodCallStatement(call)) :-
okProcessMethodCall(s, call).
okSingleStatement(, SelStatement(stat, orStats)) :-
okStatement(s, stat),
okOrStatements(s, orStats).
okSingleStatement(s, SkipStatement()).
okSingleStatement(, SendStatement(, message, , postExpression)) :-
typeOfPort(s, port),
{} exprTypes == okExpressions(s, TypeDataClassRoot(), stripOptExpressionList(optExpressions)),
{} TypeMessage(msgTypes) == typeOfSendMessage(s, port, message, lengthDataClasses(exprTypes)),
try { compatibleTypes(exprTypes, msgTypes) } | warning $[Incompatible type] @optExpressions,
okOptPostExpression(s, postExpression).
okSingleStatement(, ReceiveStatement(, message, , condition, postExpression)) :-
typeOfPort(s, port),
{} varTypes == typeOfVariables(s, stripOptVariableList(optVariables)),
{} TypeMessage(msgTypes) == typeOfReceiveMessage(s, port, message, lengthDataClasses(varTypes)),
try { compatibleTypes(varTypes, msgTypes) } | warning $[Incompatible type] @optVariables,
okOptReceptionCondition(s, condition),
okOptPostExpression(s, postExpression).
okSingleStatement(, IfThenStatement(, thenClause)) :-
{} T_Condition == okExpression(s, TypeDataClassRoot(), condition),
okStatement(s, thenClause),
try { compatibleType(T_Condition, typeOfDataClassNoRef(s, "Boolean")) } | warning $[Incompatible type] @condition.
okSingleStatement(, IfThenElseStatement(, thenClause, elseClause)) :-
{} T_Condition == okExpression(s, TypeDataClassRoot(), condition),
okStatement(s, thenClause),
okStatement(s, elseClause),
try { compatibleType(T_Condition, typeOfDataClassNoRef(s, "Boolean")) } | warning $[Incompatible type] @condition.
okSingleStatement(s, RoundBracketStatement(stat)) :- okStatement(s, stat).
okSingleStatement(, WhileStatement(, body)) :-
{} T_Condition == okExpression(s, TypeDataClassRoot(), condition),
okStatement(s, body),
try { compatibleType(T_Condition, typeOfDataClassNoRef(s, "Boolean")) } | warning $[Incompatible type] @condition.
okSingleStatement(, SwitchStatement(expr, CaseStatementList(), )) :-
try { nonEmptySwitchStatement(cases, default) } | error $[Missing case or default],
{} T_Expr == okExpression(s, TypeDataClassRoot(), expr),
okOptDefaultStatement(s, default),
okCaseStatements(s, cases, T_Expr).
okSingleStatement(s, ExpressionStatement(expr)) :-
okSingleExpression(s, TypeDataClassRoot(), expr) == _.
okSingleStatement(s, CurlyExpressionStatement(expr)) :-
okExpression(s, TypeDataClassRoot(), expr) == _.
: scope * OptReceptionCondition
okOptReceptionCondition(s, ReceptionCondition(expr)) :- okExpression(s, TypeDataClassRoot(), expr) == _.
okOptReceptionCondition(s, NoReceptionCondition()).
: scope * OptPostExpression
okOptPostExpression(s, PostExpression(expr)) :- okExpression(s, TypeDataClassRoot(), expr) == _.
okOptPostExpression(s, NoPostExpression()).
: scope * OptDefaultStatement
okOptDefaultStatement(s, DefaultStatement(expr)) :- okStatement(s, expr).
okOptDefaultStatement(s, NoDefaultStatement()).
okCaseStatements maps okCaseStatement(*, list(*), *)
: scope * CaseStatement * TypeDataClass
okCaseStatement(, CaseStatement(, body), T_Expr) :-
{} T_Condition == okExpression(s, TypeDataClassRoot(), condition),
okStatement(s, body),
try { compatibleType(T_Condition, T_Expr) } | warning $[Incompatible type] @condition.
rules // === Expressions =======
maps okExpression(*, *, list(*)) = list(*)
: scope * TypeDataClass * Expression -> TypeDataClass
okExpression(s, typeClass, ExpressionSequence(exprs)) = okSingleExpressions(s, typeClass, exprs).
: scope * TypeDataClass * list(SingleExpression) -> TypeDataClass
okSingleExpressions(s, typeClass, [expr]) = okSingleExpression(s, typeClass, expr).
okSingleExpressions(s, typeClass, [expr|exprs]) = okSingleExpressions(s, typeClass, exprs) :-
okSingleExpression(s, typeClass, expr) == _.
: scope * TypeDataClass * SingleExpression -> TypeDataClass
okSingleExpression(, typeClass, AssignmentExpression(var, )) = :-
{} T_Var == typeOfVariable(s, var),
T == okSingleExpression(s, typeClass, expr),
try { compatibleType(T_Var, T) } | warning $[Incompatible type] @expr.
okSingleExpression(s, typeClass, ReturnExpression(expr)) = okSingleExpression(s, typeClass, expr).
okSingleExpression(, , BinaryOperatorExpression2(left, op, right)) = T :-
{} T_Left == okSingleExpression(s, typeClass, left),
{} T_Right == okSingleExpression(s, typeClass, right),
{} T_Candidates == typeOfBinaryDataMethods(s, OperatorBinary2(op)),
{} T_Filtered_Candidates == filterCompatible(T_Candidates, T_Left, [T_Right]),
try { T_Filtered_Candidates == [_|_] } | warning $[No method with compatible parameter types],
T == gcaList(getDataMethodReturnTypes(T_Filtered_Candidates)).
okSingleExpression(, , BinaryOperatorExpression3(left, op, right)) = T :-
{} T_Left == okSingleExpression(s, typeClass, left),
{} T_Right == okSingleExpression(s, typeClass, right),
{} T_Candidates == typeOfBinaryDataMethods(s, OperatorBinary3(op)),
{} T_Filtered_Candidates == filterCompatible(T_Candidates, T_Left, [T_Right]),
try { T_Filtered_Candidates == [_|_] } | warning $[No method with compatible parameter types],
T == gcaList(getDataMethodReturnTypes(T_Filtered_Candidates)).
okSingleExpression(, , BinaryOperatorExpression4(left, op, right)) = T :-
{} T_Left == okSingleExpression(s, typeClass, left),
{} T_Right == okSingleExpression(s, typeClass, right),
{} T_Candidates == typeOfBinaryDataMethods(s, OperatorBinary4(op)),
{} T_Filtered_Candidates == filterCompatible(T_Candidates, T_Left, [T_Right]),
try { T_Filtered_Candidates == [_|_] } | warning $[No method with compatible parameter types],
T == gcaList(getDataMethodReturnTypes(T_Filtered_Candidates)).
okSingleExpression(, , DataMethodCallExpression(expr, onSuperClass, name, optParameters)) = T :-
{} T_Expr == okSingleExpression(s, typeClass, expr),
{} T_Target == okOnSuperClass(T_Expr, onSuperClass),
{} T_Parameters == okExpressions(s, typeClass, stripOptExpressionList(optParameters)),
{} T_Candidates == typeOfNamedDataMethods(s, name, lengthDataClasses(T_Parameters)),
{} T_Filtered_Candidates == filterCompatible(T_Candidates, T_Target, T_Parameters),
try { T_Filtered_Candidates == [_|_] } | warning $[No method with compatible parameter types],
T == gcaList(getDataMethodReturnTypes(T_Filtered_Candidates)).
okSingleExpression(, typeClass, UnaryOperatorExpression(op, expr)) = T :-
{} T_Expr == okSingleExpression(s, typeClass, expr),
{} T_Candidates == typeOfUnaryDataMethods(s, op),
{} T_Filtered_Candidates == filterCompatible(T_Candidates, T_Expr, []),
try { T_Filtered_Candidates == [_|_] } | warning $[No method with compatible parameter types],
T == gcaList(getDataMethodReturnTypes(T_Filtered_Candidates)).
okSingleExpression(s, , IfThenExpression(, thenClause)) = typeOfDataClassNoRef(, "Object") :-
{} T_Condition == okExpression(s, typeClass, condition),
{T_Then} T_Then == okExpression(s, typeClass, thenClause),
try { compatibleType(T_Condition, typeOfDataClassNoRef(s, "Boolean")) } | warning $[Incompatible type] @condition.
okSingleExpression(, , IfThenElseExpression(, thenClause, elseClause)) = gca(T_Then, T_Else) :-
{} T_Condition == okExpression(s, typeClass, condition),
T_Then == okExpression(s, typeClass, thenClause),
T_Else == okExpression(s, typeClass, elseClause),
try { compatibleType(T_Condition, typeOfDataClassNoRef(s, "Boolean")) } | warning $[Incompatible type] @condition.
okSingleExpression(s, , WhileExpression(, body)) = typeOfDataClass(, "Object") :-
{} T_Condition == okExpression(s, typeClass, condition),
{T_Body} T_Body == okExpression(s, typeClass, body),
try { compatibleType(T_Condition, typeOfDataClassNoRef(s, "Boolean")) } | warning $[Incompatible type] @condition.
okSingleExpression(, , SwitchExpression(expr, CaseExpressionList(), )) = T :-
try { nonEmptySwitchExpression(cases, default) } | warning $[Missing case or default],
{} T_Expr == okExpression(s, typeClass, expr),
{} T_Default == okOptDefaultExpression(s, typeClass, default),
T == okCaseExpressions(s, typeClass, cases, T_Expr, T_Default).
okSingleExpression(s, typeClass, CurrentTimeExpression()) = typeOfDataClassNoRef(s, "Real").
okSingleExpression(s, typeClass, SelfExpression()) = typeClass.
okSingleExpression(s, typeClass, ConstantExpression(expr)) = okConstantExpression(s, expr).
okSingleExpression(s, typeClass, NewExpression(class)) = typeOfDataClass(s, class).
okSingleExpression(s, typeClass, VariableExpression(var)) = typeOfVariable(s, var).
okSingleExpression(s, typeClass, RoundBracketExpression(expr)) = okExpression(s, typeClass, expr).
: scope * ExpressionConstant -> TypeDataClass
okConstantExpression(s, BooleanConstant(value)) = typeOfDataClassNoRef(s, "Boolean").
okConstantExpression(s, CharacterConstant(value)) = typeOfDataClassNoRef(s, "Char").
okConstantExpression(s, FloatConstant(value)) = typeOfDataClassNoRef(s, "Real").
okConstantExpression(s, IntegerConstant(value)) = typeOfDataClassNoRef(s, "Integer").
okConstantExpression(s, NilConstant()) = typeOfDataClassNoRef(s, "Object").
okConstantExpression(s, RealConstant(value)) = typeOfDataClassNoRef(s, "Real").
okConstantExpression(s, StringConstant(value)) = typeOfDataClassNoRef(s, "String").
okConstantExpression(s, EnvironmentConstant(value)) = typeOfDataClassNoRef(s, "Object").
: TypeDataClass * OnSuperClass -> TypeDataClass
okOnSuperClass(tc, NotOnSuperClass()) = tc.
okOnSuperClass(TypeDataClassRoot(), OnSuperClass()) = TypeDataClassRoot().
okOnSuperClass(TypeDataClass(s, e), OnSuperClass()) = e.
: scope * TypeDataClass * OptDefaultExpression -> TypeDataClass
okOptDefaultExpression(s, typeClass, DefaultExpression(expr)) = okExpression(s, typeClass, expr).
okOptDefaultExpression(s, typeClass, NoDefaultExpression()) = typeOfDataClassNoRef(s, "Object").
: scope * TypeDataClass * list(CaseExpression) * TypeDataClass * TypeDataClass -> TypeDataClass
okCaseExpressions(s, typeClass, [], T_Expr, T_Default) = T_Default.
okCaseExpressions(s, typeClass, [case|cases], T_Expr, T_Base) = okCaseExpressions(s, typeClass, cases, T_Expr, gca(T_Base, okCaseExpression(s, typeClass, case, T_Expr))).
: scope * TypeDataClass * CaseExpression * TypeDataClass -> TypeDataClass
okCaseExpression(, , CaseExpression(, body), T_Expr) = T_Body :-
{} T_Condition == okExpression(s, typeClass, condition),
try { compatibleType(T_Condition, T_Expr) } | warning $[Incompatible type] @condition,
T_Body == okExpression(s, typeClass, body).
rules // === Non-empty switch =======
: list(CaseExpression) * OptDefaultExpression
nonEmptySwitchExpression([C|Cs], _).
nonEmptySwitchExpression(_, DefaultExpression(s)).
: list(CaseStatement) * OptDefaultStatement
nonEmptySwitchStatement([C|Cs], _).
nonEmptySwitchStatement(_, DefaultStatement(s)).
rules // === Getters on TypeDataMethod =======
maps getDataMethodReturnType(list(*)) = list(*)
: TypeDataMethod -> TypeDataClass
getDataMethodReturnType(TypeDataMethod(receiver, args, retType)) = retType.
|