-
Notifications
You must be signed in to change notification settings - Fork 1
/
ast.ml
163 lines (144 loc) · 4.83 KB
/
ast.ml
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
type typ =
Int
| Bool
| Void
| String
| Array1DType of typ * int (* int[m] *)
| CoordinateType
| PlayerType
| Array2DType of typ * int * int (* int[m][n] *)
| StructType of string
| PointerType of typ
| GridType of int * int
type op = Add
| Sub
| Mult
| Div
| Equal
| Neq
| Less
| Leq
| Greater
| Geq
| And
| Or
| Modulo
type uop = Neg | Not | Deref | Ref
type bind = typ * string
type expr =
Literal of int
| Null of string
| BoolLit of bool
| ArrIndexLiteral of string * expr
| Arr2DIndexLiteral of string * expr * expr
| Coordinate_Lit of expr * expr
| Call of string * expr list
| Id of string
| Binop of expr * op * expr
| Dotop of expr * string
| Unop of uop * expr
| GridAssign of expr * expr * expr
| DeletePlayer of expr * expr * expr
| Assign of expr * expr
| GridCreate of int * int
| Array1DAccess of string * expr * expr (* assigning some value to an array *)
| Array2DAccess of string * expr * expr * expr (* assigning some value to a 2D array *)
| String_Lit of string
| CoordinateAssign of string * expr * expr
| ArrAssign of string * expr * expr (* assigning some value to an array *)
| ArrayLiteral of expr list (* list inside array *)
| Repeat (* added repeat keyword in expr*)
| Noexpr
type stmt =
Block of stmt list
| Expr of expr
| For of expr * expr * expr * stmt
| If of expr * stmt * stmt
| While of expr * stmt
| Return of expr
type func_decl = {
typ : typ;
fname : string;
formals : bind list;
locals : bind list;
body : stmt list;
}
type struct_decl = { (* for adding player datatype *)
sname: string;
sformals: bind list;
sfunc: func_decl;
}
type program = bind list * func_decl list * struct_decl list
(* Pretty-printing functions *)
let string_of_op = function
Add -> "+"
| Sub -> "-"
| Mult -> "*"
| Div -> "/"
| Equal -> "=="
| Neq -> "!="
| Less -> "<"
| Leq -> "<="
| Greater -> ">"
| Geq -> ">="
| And -> "&&"
| Or -> "||"
let string_of_uop = function
Neg -> "-"
| Not -> "!"
| Deref -> "Deref"
| Ref -> "&"
let rec string_of_expr = function
Literal(l) -> string_of_int l
| BoolLit(true) -> "true"
| BoolLit(false) -> "false"
| ArrIndexLiteral(s, e) -> s ^ "[" ^ string_of_expr e ^ "]"
| Arr2DIndexLiteral(s, e1, e2) -> s ^ "[" ^ string_of_expr e1 ^ "]" ^ "[" ^ string_of_expr e2 ^ "]"
| Id(s) -> s
| String_Lit(s) -> s
| Coordinate_Lit(e1, e2) -> string_of_expr e1 ^ ", " ^ string_of_expr e2
| Dotop(e, s) -> string_of_expr e ^ "." ^ s
| Binop(e1, o, e2) ->
string_of_expr e1 ^ " " ^ string_of_op o ^ " " ^ string_of_expr e2
| Unop(o, e) -> string_of_uop o ^ string_of_expr e
| Assign(v, e) -> string_of_expr v ^ " = " ^ string_of_expr e
| Array1DAccess(s, e1, e2) -> s (* assigning some value to an array *)
| Array2DAccess(s, e1, e2, e3) -> s (* assigning some value to a 2D array *)
| CoordinateAssign(s, e1, e2) -> s
| Repeat -> "repeat" (* added repeat keyword in expr*)
| Call(f, el) ->
f ^ "(" ^ String.concat ", " (List.map string_of_expr el) ^ ")"
| Noexpr -> ""
let rec string_of_stmt = function
Block(stmts) ->
"{\n" ^ String.concat "" (List.map string_of_stmt stmts) ^ "}\n"
| Expr(expr) -> string_of_expr expr ^ ";\n";
| Return(expr) -> "return " ^ string_of_expr expr ^ ";\n";
| If(e, s, Block([])) -> "if (" ^ string_of_expr e ^ ")\n" ^ string_of_stmt s
| If(e, s1, s2) -> "if (" ^ string_of_expr e ^ ")\n" ^
string_of_stmt s1 ^ "else\n" ^ string_of_stmt s2
| For(e1, e2, e3, s) ->
"for (" ^ string_of_expr e1 ^ " ; " ^ string_of_expr e2 ^ " ; " ^
string_of_expr e3 ^ ") " ^ string_of_stmt s
| While(e, s) -> "while (" ^ string_of_expr e ^ ") " ^ string_of_stmt s
let rec string_of_typ = function
Int -> "int"
| Bool -> "bool"
| Void -> "void"
| String -> "string"
| Array1DType(typ, e) -> string_of_typ typ ^ " array [" ^ string_of_int e ^ "]"
| CoordinateType -> "coordinate"
| Array2DType(typ, e1, e2) -> string_of_typ typ ^ " array [" ^ string_of_int e1 ^ "][" ^ string_of_int e2 ^ "]"
| StructType(s) -> "struct " ^ s
| PointerType(typ) -> string_of_typ typ ^ " pointer"
let string_of_vdecl (t, id) = string_of_typ t ^ " " ^ id ^ ";\n"
let string_of_fdecl fdecl =
string_of_typ fdecl.typ ^ " " ^
fdecl.fname ^ "(" ^ String.concat ", " (List.map snd fdecl.formals) ^
")\n{\n" ^
String.concat "" (List.map string_of_vdecl fdecl.locals) ^
String.concat "" (List.map string_of_stmt fdecl.body) ^
"}\n"
let string_of_program (vars, funcs) =
String.concat "" (List.map string_of_vdecl vars) ^ "\n" ^
String.concat "\n" (List.map string_of_fdecl funcs)