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
|
module AST where
import Data.List
import Defs
import Pretty
data Program = Program [DVar] [DFunc]
deriving (Show, Eq)
data DVar = DVar Type Name Expression
deriving (Show, Eq)
data DFunc = DFunc (Maybe Type) Name [(Type, Name)] Block
deriving (Show, Eq)
data Type
= TInt | TChar | TArr Type (Maybe Size)
deriving (Show, Eq)
data Block = Block [Statement]
deriving (Show, Eq)
data Statement
= SDecl Type Name Expression
| SAs AsExpression Expression
| SIf Expression Block Block
| SWhile Expression Block
| SBreak Int
| SReturn (Maybe Expression)
| SExpr Expression
| SDebugger
deriving (Show, Eq)
data AsExpression
= AEVar Name (Maybe Type)
| AESubscript AsExpression Expression (Maybe Type)
deriving (Show, Eq)
data Expression
= EBin BinaryOp Expression Expression (Maybe Type)
| EUn UnaryOp Expression (Maybe Type)
| ELit Literal (Maybe Type)
| ESubscript Expression Expression (Maybe Type)
| ECast Type Expression
| ENew Type Expression
deriving (Show, Eq)
data BinaryOp
= BOAdd | BOSub | BOMul | BODiv | BOMod | BOPow
| BOAnd | BOOr
| BOBitAnd | BOBitOr | BOBitXor
| BOEq | BONeq | BOGt | BOLt | BOGeq | BOLeq
deriving (Show, Eq)
data UnaryOp
= UONot | UONeg
deriving (Show, Eq)
data Literal
= LInt Integer
| LChar Char
| LVar Name
| LCall Name [Expression]
deriving (Show, Eq)
sizeof :: Type -> Size
sizeof TInt = 8
sizeof TChar = 1
sizeof (TArr _ _) = 8
instance Pretty Program where
prettyI i (Program vars funcs) =
concatMap (++ ("\n" ++ indent i)) $
map (prettyI i) vars ++ map (prettyI i) funcs
where
indent n = replicate (2*n) ' '
instance Pretty DVar where
prettyI i (DVar t n e) =
prettyI i t ++ " " ++ n ++ " := " ++ prettyI i e ++ ";"
instance Pretty DFunc where
prettyI i (DFunc mt n al b) =
"func" ++ maybe "" ((' ' :) . prettyI i) mt ++ " " ++ n ++ "(" ++
intercalate ","
(map (\(at,an) -> prettyI i at ++ " " ++ an) al) ++
") " ++ prettyI i b
instance Pretty Type where
prettyI _ TInt = "int"
prettyI _ TChar = "char"
prettyI _ (TArr t Nothing) = pretty t ++ "[]"
prettyI _ (TArr t (Just sz)) = pretty t ++ "[" ++ show sz ++ "]"
instance Pretty Block where
prettyI _ (Block []) = "{}"
prettyI i (Block l) =
"{" ++
concatMap (("\n" ++ indent (i+1)) ++) (map (prettyI (i+1)) l) ++
"\n" ++ indent i ++ "}"
where
indent n = replicate (2*n) ' '
instance Pretty Statement where
prettyI i (SDecl t n e) =
prettyI i t ++ " " ++ n ++ " := " ++ prettyI i e ++ ";"
prettyI i (SAs target e) =
prettyI i target ++ " = " ++ prettyI i e ++ ";"
prettyI i (SIf c b1 b2) =
"if " ++ prettyI i c ++ " " ++ prettyI i b1 ++ " else " ++ prettyI i b2
prettyI i (SWhile c b) =
"while " ++ prettyI i c ++ " " ++ prettyI i b
prettyI _ (SBreak 0) =
"break;"
prettyI _ (SBreak n) =
"break " ++ show n ++ ";"
prettyI _ (SReturn Nothing) =
"return;"
prettyI i (SReturn (Just e)) =
"return " ++ prettyI i e ++ ";"
prettyI i (SExpr e) = prettyI i e ++ ";"
prettyI _ SDebugger = "debugger;"
instance Pretty Expression where
prettyI i (EBin bo a b (Just t)) =
"(" ++ prettyI i (EBin bo a b Nothing) ++ " :: " ++ prettyI i t ++ ")"
prettyI i (EBin bo a b Nothing) =
"(" ++ prettyI i a ++ ") " ++ prettyI i bo ++
" (" ++ prettyI i b ++ ")"
prettyI i (EUn uo e (Just t)) =
"(" ++ prettyI i (EUn uo e Nothing) ++ " :: " ++ prettyI i t ++ ")"
prettyI i (EUn uo e Nothing) =
prettyI i uo ++ "(" ++ prettyI i e ++ ")"
prettyI i (ELit l (Just t)) =
"(" ++ prettyI i (ELit l Nothing) ++ " :: " ++ prettyI i t ++ ")"
prettyI i (ELit l Nothing) = prettyI i l
prettyI i (ESubscript a b (Just t)) =
"(" ++ prettyI i (ESubscript a b Nothing) ++ " :: " ++ prettyI i t ++ ")"
prettyI i (ESubscript a b Nothing) = "(" ++ prettyI i a ++ ")[" ++ prettyI i b ++ "]"
prettyI i (ECast t e) = prettyI i t ++ "(" ++ prettyI i e ++ ")"
prettyI i (ENew t e) = "new " ++ prettyI i t ++ "[" ++ prettyI i e ++ "]"
instance Pretty AsExpression where
prettyI i (AEVar n (Just t)) =
"(" ++ prettyI i (AEVar n Nothing) ++ " :: " ++ prettyI i t ++ ")"
prettyI _ (AEVar n Nothing) = n
prettyI i (AESubscript ae e (Just t)) =
"(" ++ prettyI i (AESubscript ae e Nothing) ++ " :: " ++ prettyI i t ++ ")"
prettyI i (AESubscript ae e Nothing) = prettyI i ae ++ "[" ++ prettyI i e ++ "]"
instance Pretty BinaryOp where
prettyI _ BOAdd = "+"
prettyI _ BOSub = "-"
prettyI _ BOMul = "*"
prettyI _ BODiv = "/"
prettyI _ BOPow = "**"
prettyI _ BOMod = "%"
prettyI _ BOAnd = "&&"
prettyI _ BOOr = "||"
prettyI _ BOEq = "=="
prettyI _ BONeq = "!="
prettyI _ BOGt = ">"
prettyI _ BOLt = "<"
prettyI _ BOGeq = ">="
prettyI _ BOLeq = "<="
prettyI _ BOBitAnd = "&"
prettyI _ BOBitOr = "|"
prettyI _ BOBitXor = "^"
instance Pretty UnaryOp where
prettyI _ UONot = "!"
prettyI _ UONeg = "-"
instance Pretty Literal where
prettyI _ (LInt n) = show n
prettyI _ (LChar c) = show c
prettyI _ (LVar n) = n
prettyI i (LCall n al) =
n ++ "(" ++ intercalate ", " (map (prettyI i) al) ++ ")"
|
