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| (function(sc) {
"use strict";
require("./lang");
require("./dollar");
require("./klass/utils");
var iterator = {};
var $ = sc.lang.$;
var $nil = $.nil;
var $int0 = $.int0;
var $int1 = $.int1;
var __stop__ = function() {
return null;
};
function toNOPIterator(iter) {
iter.hasNext = false;
iter.next = __stop__;
return iter;
}
toNOPIterator.clone = function() {
return toNOPIterator;
};
toNOPIterator(toNOPIterator);
function makeStepIterator($start, $end, $step, cond, stepper, type) {
var $i = $start, j = 0, iter = {
hasNext: true,
next: function() {
var $ret = $i;
$i = stepper($i, $step);
if (cond($i, $end)) {
toNOPIterator(iter);
}
return [ type ? type($ret) : $ret, $.Integer(j++) ];
},
clone: function() {
return makeStepIterator($start, $end, $step, cond, stepper, type);
}
};
return iter;
}
function makeSCStepIterator($start, $end, $step, cond) {
return makeStepIterator($start, $end, $step, cond, function($i, $step) {
return $i ["+"] ($step);
}, null);
}
function makeSCIncrmentalIterator($start, $end, $step) {
return makeSCStepIterator($start, $end, $step, function($i, $end) {
return $i > $end;
});
}
function makeSCDecrementalIterator($start, $end, $step) {
return makeSCStepIterator($start, $end, $step, function($i, $end) {
return $i < $end;
});
}
function makeSCNumericIterator($start, $end, $step) {
if ($start.valueOf() === $end.valueOf()) {
return once$iter($start);
} else if ($start < $end && $step > 0) {
return makeSCIncrmentalIterator($start, $end, $step);
} else if ($start > $end && $step < 0) {
return makeSCDecrementalIterator($start, $end, $step);
}
return toNOPIterator;
}
function makeJSNumericIterator$do($endval, type) {
var end = type($endval.__num__()).valueOf();
return makeJSNumericIterator(0, end - 1, +1, type);
}
function makeJSNumericIterator$reverseDo($startval, type) {
var start = type($startval.__num__()).valueOf();
var end = (start|0) - start;
return makeJSNumericIterator(start - 1, end, -1, type);
}
function makeJSNumericIterator$for($startval, $endval, type) {
var start = type($startval.__num__()).valueOf();
var end = type($endval .__num__()).valueOf();
var step = (start <= end) ? +1 : -1;
return makeJSNumericIterator(start, end, step, type);
}
function makeJSNumericIterator$forBy($startval, $endval, $stepval, type) {
var start = type($startval.__num__()).valueOf();
var end = type($endval .__num__()).valueOf();
var step = type($stepval .__num__()).valueOf();
return makeJSNumericIterator(start, end, step, type);
}
function makeJSNumericIterator$forSeries($startval, $second, $last, type) {
var start = type($startval.__num__()).valueOf();
var second = type($second .__num__()).valueOf();
var end = type($last .__num__()).valueOf();
var step = second - start;
return makeJSNumericIterator(start, end, step, type);
}
function makeListIterator(list) {
var i = 0, iter = {
hasNext: true,
next: function() {
var $ret = list[i++];
if (i >= list.length) {
toNOPIterator(iter);
}
return [ $ret, $.Integer(i - 1) ];
},
clone: function() {
return makeListIterator(list);
}
};
return iter;
}
function makeJSArrayIterator(list) {
if (list.length) {
return makeListIterator(list);
}
return toNOPIterator;
}
var once$iter = function(value) {
var iter = {
hasNext: true,
next: function() {
toNOPIterator(iter);
return [ value, $int0 ];
},
clone: function() {
return once$iter(value);
}
};
return iter;
};
iterator.execute = function(iter, $function) {
$function._bytecode.setIterator(iter).run();
};
iterator.object$do = once$iter;
iterator.function$while = function($function) {
var bytecode, iter;
bytecode = $function._bytecode;
iter = {
hasNext: true,
next: function() {
if (!bytecode.runAsFunction().__bool__()) {
toNOPIterator(iter);
return null;
}
return [ $nil, $nil ];
},
clone: function() {
return iterator.function$while($function);
}
};
return iter;
};
iterator.function$loop = function() {
var iter = {
hasNext: true,
next: function() {
return [ $nil, $nil ];
},
clone: function() {
return iter;
}
};
return iter;
};
iterator.number$do = function($end) {
var $start, $step;
$start = $int0;
$end = $end.__dec__();
$step = $int1;
return makeSCNumericIterator($start, $end, $step);
};
iterator.number$reverseDo = function($start) {
var $end, $step;
$start = $start.__dec__();
$end = $int0;
$step = $.Integer(-1);
return makeSCNumericIterator($start, $end, $step);
};
iterator.number$for = function($start, $end) {
var $step;
$step = ($start <= $end) ? $int1 : $.Integer(-1);
return makeSCNumericIterator($start, $end, $step);
};
iterator.number$forBy = function($start, $end, $step) {
return makeSCNumericIterator($start, $end, $step);
};
iterator.number$forSeries = function($start, $second, $last) {
var $step;
$step = $second ["-"] ($start);
return makeSCNumericIterator($start, $last, $step);
};
function makeJSStepIterator(start, end, step, type, cond) {
return makeStepIterator(start, end, step, cond, function(i, step) {
return i + step;
}, type);
}
function makeJSIncrementalIterator(start, end, step, type) {
return makeJSStepIterator(start, end, step, type, function(i, end) {
return i > end;
});
}
function makeJSDecrementalIterator(start, end, step, type) {
return makeJSStepIterator(start, end, step, type, function(i, end) {
return i < end;
});
}
function makeJSNumericIterator(start, end, step, type) {
if (start === end) {
return once$iter(type(start));
} else if (start < end && step > 0) {
return makeJSIncrementalIterator(start, end, step, type);
} else if (start > end && step < 0) {
return makeJSDecrementalIterator(start, end, step, type);
}
return toNOPIterator;
}
iterator.integer$do = function($endval) {
return makeJSNumericIterator$do($endval, $.Integer);
};
iterator.integer$reverseDo = function($startval) {
return makeJSNumericIterator$reverseDo($startval, $.Integer);
};
iterator.integer$for = function($startval, $endval) {
return makeJSNumericIterator$for($startval, $endval, $.Integer);
};
iterator.integer$forBy = function($startval, $endval, $stepval) {
return makeJSNumericIterator$forBy($startval, $endval, $stepval, $.Integer);
};
iterator.integer$forSeries = function($startval, $second, $last) {
return makeJSNumericIterator$forSeries($startval, $second, $last, $.Integer);
};
iterator.float$do = function($endval) {
return makeJSNumericIterator$do($endval, $.Float);
};
iterator.float$reverseDo = function($startval) {
return makeJSNumericIterator$reverseDo($startval, $.Float);
};
iterator.float$for = function($startval, $endval) {
return makeJSNumericIterator$for($startval, $endval, $.Float);
};
iterator.float$forBy = function($startval, $endval, $stepval) {
return makeJSNumericIterator$forBy($startval, $endval, $stepval, $.Float);
};
iterator.float$forSeries = function($startval, $second, $last) {
return makeJSNumericIterator$forSeries($startval, $second, $last, $.Float);
};
iterator.array$do = function($array) {
return makeJSArrayIterator($array._.slice());
};
iterator.array$reverseDo = function($array) {
return makeJSArrayIterator($array._.slice().reverse());
};
iterator.set$do = function($set) {
return makeJSArrayIterator($set._$array._.filter(function($elem) {
return $elem !== $nil;
}));
};
sc.lang.iterator = iterator;
})(sc);
|