3 using System
.Collections
;
4 using System
.Collections
.Generic
;
6 using MalVal
= Mal
.types
.MalVal
;
7 using MalString
= Mal
.types
.MalString
;
8 using MalSymbol
= Mal
.types
.MalSymbol
;
9 using MalInt
= Mal
.types
.MalInt
;
10 using MalList
= Mal
.types
.MalList
;
11 using MalVector
= Mal
.types
.MalVector
;
12 using MalHashMap
= Mal
.types
.MalHashMap
;
13 using MalFunc
= Mal
.types
.MalFunc
;
14 using Env
= Mal
.env
.Env
;
19 static MalVal
READ(string str
) {
20 return reader
.read_str(str
);
24 public static bool is_pair(MalVal x
) {
25 return x
is MalList
&& ((MalList
)x
).size() > 0;
28 public static MalVal
quasiquote(MalVal ast
) {
30 return new MalList(new MalSymbol("quote"), ast
);
32 MalVal a0
= ((MalList
)ast
)[0];
33 if ((a0
is MalSymbol
) &&
34 (((MalSymbol
)a0
).getName() == "unquote")) {
35 return ((MalList
)ast
)[1];
36 } else if (is_pair(a0
)) {
37 MalVal a00
= ((MalList
)a0
)[0];
38 if ((a00
is MalSymbol
) &&
39 (((MalSymbol
)a00
).getName() == "splice-unquote")) {
40 return new MalList(new MalSymbol("concat"),
42 quasiquote(((MalList
)ast
).rest()));
45 return new MalList(new MalSymbol("cons"),
47 quasiquote(((MalList
)ast
).rest()));
51 static MalVal
eval_ast(MalVal ast
, Env env
) {
52 if (ast
is MalSymbol
) {
53 return env
.get((MalSymbol
)ast
);
54 } else if (ast
is MalList
) {
55 MalList old_lst
= (MalList
)ast
;
56 MalList new_lst
= ast
.list_Q() ? new MalList()
57 : (MalList
)new MalVector();
58 foreach (MalVal mv
in old_lst
.getValue()) {
59 new_lst
.conj_BANG(EVAL(mv
, env
));
62 } else if (ast
is MalHashMap
) {
63 var new_dict
= new Dictionary
<string, MalVal
>();
64 foreach (var entry
in ((MalHashMap
)ast
).getValue()) {
65 new_dict
.Add(entry
.Key
, EVAL((MalVal
)entry
.Value
, env
));
67 return new MalHashMap(new_dict
);
74 static MalVal
EVAL(MalVal orig_ast
, Env env
) {
75 MalVal a0
, a1
, a2
, res
;
80 //Console.WriteLine("EVAL: " + printer._pr_str(orig_ast, true));
81 if (!orig_ast
.list_Q()) {
82 return eval_ast(orig_ast
, env
);
86 MalList ast
= (MalList
)orig_ast
;
87 if (ast
.size() == 0) { return ast; }
90 String a0sym
= a0
is MalSymbol
? ((MalSymbol
)a0
).getName()
98 env
.set((MalSymbol
)a1
, res
);
105 Env let_env
= new Env(env
);
106 for(int i
=0; i
<((MalList
)a1
).size(); i
+=2) {
107 key
= (MalSymbol
)((MalList
)a1
)[i
];
108 val
= ((MalList
)a1
)[i
+1];
109 let_env
.set(key
, EVAL(val
, let_env
));
117 orig_ast
= quasiquote(ast
[1]);
120 eval_ast(ast
.slice(1, ast
.size()-1), env
);
121 orig_ast
= ast
[ast
.size()-1];
125 MalVal cond
= EVAL(a1
, env
);
126 if (cond
== Mal
.types
.Nil
|| cond
== Mal
.types
.False
) {
127 // eval false slot form
128 if (ast
.size() > 3) {
131 return Mal
.types
.Nil
;
134 // eval true slot form
139 MalList a1f
= (MalList
)ast
[1];
142 return new MalFunc(a2f
, env
, a1f
,
143 args
=> EVAL(a2f
, new Env(cur_env
, a1f
, args
)) );
145 el
= (MalList
)eval_ast(ast
, env
);
146 var f
= (MalFunc
)el
[0];
147 MalVal fnast
= f
.getAst();
150 env
= f
.genEnv(el
.rest());
152 return f
.apply(el
.rest());
161 static string PRINT(MalVal exp
) {
162 return printer
._pr_str(exp
, true);
166 static void Main(string[] args
) {
167 var repl_env
= new Mal
.env
.Env(null);
168 Func
<string, MalVal
> RE
= (string str
) => EVAL(READ(str
), repl_env
);
170 // core.cs: defined using C#
171 foreach (var entry
in core
.ns
) {
172 repl_env
.set(new MalSymbol(entry
.Key
), entry
.Value
);
174 repl_env
.set(new MalSymbol("eval"), new MalFunc(
175 a
=> EVAL(a
[0], repl_env
)));
177 if (args
.Length
> 0 && args
[0] == "--raw") {
178 Mal
.readline
.mode
= Mal
.readline
.Mode
.Raw
;
181 MalList _argv
= new MalList();
182 for (int i
=fileIdx
+1; i
< args
.Length
; i
++) {
183 _argv
.conj_BANG(new MalString(args
[i
]));
185 repl_env
.set(new MalSymbol("*ARGV*"), _argv
);
187 // core.mal: defined using the language itself
188 RE("(def! not (fn* (a) (if a false true)))");
189 RE("(def! load-file (fn* (f) (eval (read-string (str \"(do \" (slurp f) \")\")))))");
191 if (args
.Length
> fileIdx
) {
192 RE("(load-file \"" + args
[fileIdx
] + "\")");
200 line
= Mal
.readline
.Readline("user> ");
201 if (line
== null) { break; }
202 if (line
== "") { continue; }
203 } catch (IOException e
) {
204 Console
.WriteLine("IOException: " + e
.Message
);
208 Console
.WriteLine(PRINT(RE(line
)));
209 } catch (Mal
.types
.MalContinue
) {
211 } catch (Exception e
) {
212 Console
.WriteLine("Error: " + e
.Message
);
213 Console
.WriteLine(e
.StackTrace
);