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clojure = {
in_ns: function(s) {
var ns = s.substring(1);
if( ! window[ns] ) {
window[ns] = {};
}
},
refer: function(s) {},
seq: function(coll){
if( coll === null ) return null;
else if( coll.seq ) return coll.seq();
//else if( coll.constructor === String )
// return clojure.lang.StringSeq.create(coll);
else if( typeof coll.length == typeof 0 )
return clojure.lang.ArraySeq.create(coll);
else if( typeof coll === typeof {} )
return clojure.JS.ObjSeq.create(coll);
throw ("Don't know how to create ISeq from: " +
(typeof coll) + " " + coll.constructor.name);
},
first: function(x) {
if( x.first ) return x.first();
var seq = clojure.seq( x );
if( seq === null ) return null;
return seq.first();
},
rest: function(x) {
if( x.rest ) return x.rest();
var seq = clojure.seq( x );
if( seq === null ) return null;
return seq.rest();
},
second: function(x) { return clojure.first(clojure.rest(x)); },
prn: print,
count: function(x) {
if( x === null ) return 0;
if( x.count ) return x.count();
if( x.length != undefined ) return x.length;
throw ("count not supported on: " + (typeof x) + " " + x.constructor);
},
JS: {
resolveVar: function( sym, ctxns ) {
return ctxns[ sym ] || clojure[ sym ] || window[ sym ];
},
ObjSeq: {
create: function( obj ) {
var pairs = [];
for( var i in obj ) {
pairs.push( [i, obj[i]] );
}
return clojure.lang.ArraySeq.create( pairs );
}
}
},
lang: {
Numbers: {
isPos: function(x) { return x > 0; },
dec: function(x) { return x - 1; }
}
}
};
clojure.lang.ArraySeq = function( _meta, a, i ) {
this._meta = _meta;
this.a = a;
this.i = i;
};
clojure.lang.ArraySeq.create = function( a ) {
if( a && a.length ) {
return new clojure.lang.ArraySeq( null, a, 0 );
}
else {
return nil;
}
};
clojure.lang.ArraySeq.prototype.first = function() {
return this.a[this.i];
};
clojure.lang.ArraySeq.prototype.rest = function() {
if( this.i + 1 < this.a.length )
return new clojure.lang.ArraySeq( this._meta, this.a, this.i + 1 );
return null;
};
clojure.lang.ArraySeq.prototype.count = function() {
return this.a.length - this.i;
};
clojure.lang.ArraySeq.prototype.index = function() {
return this.i;
};
clojure.lang.ArraySeq.prototype.withMeta = function( _meta ) {
return new clojure.lang.ArraySeq( _meta, this.array, this.i );
};
clojure.lang.ArraySeq.prototype.reduce = function( fn, start ) {
var ret = (start === undefined) ? this.a[0] : fn(start, this.a[0]);
for( var x = this.i + 1; x < this.a.length; ++x ) {
ret = fn( ret, this.a[x] );
}
return ret;
};
clojure.lang.ArraySeq.prototype.seq = function() {
return this;
};
clojure.lang.LazyCons = function(f,_first,_rest) {
this.f = f;
this._first = _first === undefined ? clojure.lang.LazyCons.sentinel : _first;
this._rest = _rest === undefined ? clojure.lang.LazyCons.sentinel : _rest;
};
clojure.lang.LazyCons.sentinel = {};
clojure.lang.LazyCons.prototype.first = function() {
if( this._first === clojure.lang.LazyCons.sentinel )
this._first = this.f();
return this._first;
};
clojure.lang.LazyCons.prototype.rest = function() {
if( this._rest === clojure.lang.LazyCons.sentinel ) {
if( this._first === clojure.lang.LazyCons.sentinel ) {
this.first();
}
this._rest = clojure.seq( this.f(null) );
this.f = null;
}
return this._rest;
};
clojure.lang.LazyCons.prototype.withMeta = function(_meta) {
if( _meta == this.meta() )
return this;
//force before copying
this.rest();
return new clojure.lang.LazyCons( _meta, this._first, this._rest );
};
clojure.lang.LazyCons.prototype.seq = function() {
return this;
};
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