1 if (typeof module
!== 'undefined') {
2 var types
= require('./types');
3 var readline
= require('./node_readline');
4 var reader
= require('./reader');
5 var printer
= require('./printer');
6 var Env
= require('./env').Env
;
7 var core
= require('./core');
12 return reader
.read_str(str
);
16 function eval_ast(ast
, env
) {
17 if (types
._symbol_Q(ast
)) {
19 } else if (types
._list_Q(ast
)) {
20 return ast
.map(function(a
) { return EVAL(a
, env
); });
21 } else if (types
._vector_Q(ast
)) {
22 var v
= ast
.map(function(a
) { return EVAL(a
, env
); });
23 v
.__isvector__
= true;
25 } else if (types
._hash_map_Q(ast
)) {
28 new_hm
[EVAL(k
, env
)] = EVAL(ast
[k
], env
);
36 function _EVAL(ast
, env
) {
37 //printer.println("EVAL:", printer._pr_str(ast, true));
38 if (!types
._list_Q(ast
)) {
39 return eval_ast(ast
, env
);
43 var a0
= ast
[0], a1
= ast
[1], a2
= ast
[2], a3
= ast
[3];
46 var res
= EVAL(a2
, env
);
47 return env
.set(a1
, res
);
49 var let_env
= new Env(env
);
50 for (var i
=0; i
< a1
.length
; i
+=2) {
51 let_env
.set(a1
[i
], EVAL(a1
[i
+1], let_env
));
53 return EVAL(a2
, let_env
);
55 var el
= eval_ast(ast
.slice(1), env
);
56 return el
[el
.length
-1];
58 var cond
= EVAL(a1
, env
);
59 if (cond
=== null || cond
=== false) {
60 return typeof a3
!== "undefined" ? EVAL(a3
, env
) : null;
66 return EVAL(a2
, new Env(env
, a1
, arguments
));
69 var el
= eval_ast(ast
, env
), f
= el
[0];
70 return f
.apply(f
, el
.slice(1));
74 function EVAL(ast
, env
) {
75 var result
= _EVAL(ast
, env
);
76 return (typeof result
!== "undefined") ? result
: null;
81 return printer
._pr_str(exp
, true);
85 var repl_env
= new Env();
86 var rep = function(str
) { return PRINT(EVAL(READ(str
), repl_env
)); };
88 // core.js: defined using javascript
89 for (var n
in core
.ns
) { repl_env
.set(types
._symbol(n
), core
.ns
[n
]); }
91 // core.mal: defined using the language itself
92 rep("(def! not (fn* (a) (if a false true)))");
95 if (typeof require
!== 'undefined' && require
.main
=== module
) {
96 // Synchronous node.js commandline mode
98 var line
= readline
.readline("user> ");
99 if (line
=== null) { break; }
101 if (line
) { printer
.println(rep(line
)); }
103 if (exc
instanceof reader
.BlankException
) { continue; }
104 if (exc
.stack
) { printer
.println(exc
.stack
); }
105 else { printer
.println(exc
); }