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function CanBeConstructed(f) {
var caught = false;
try {
new f;
} catch (e) {
caught = true;
}
return !caught;
}
function IsConstructedFunction(f) {
return f.hasOwnProperty('length')
&& f.hasOwnProperty('name')
&& f.hasOwnProperty('prototype')
&& f.prototype.hasOwnProperty('constructor')
&& f.prototype.constructor === f;
}
function IsntConstructedFunction(f) {
return !f.hasOwnProperty('length')
&& !f.hasOwnProperty('name')
&& !f.hasOwnProperty('prototype')
}
var m = function() {
"use asm"
function g(){}
return g;
};
assertEq(CanBeConstructed(m), true, "asm.js modules can't be constructed");
var objM = new m;
assertEq(IsConstructedFunction(objM), true);
var g = m();
assertEq(CanBeConstructed(g), true, "asm.js functions can't be constructed");
// g is a ctor returning an primitive value, thus an empty object
assertEq(Object.getOwnPropertyNames(new g).length, 0);
var n = function() {
"use asm"
function g(){return 42.0}
function h(){return 42}
return {
g: g,
h: h
};
};
assertEq(CanBeConstructed(n), true, "asm.js modules can't be constructed");
var objN = new n;
// objN is an object with attributes g and h
assertEq(IsntConstructedFunction(objN), true);
assertEq(objN.hasOwnProperty('g'), true);
assertEq(objN.hasOwnProperty('h'), true);
assertEq(IsConstructedFunction(objN.g), true);
assertEq(IsConstructedFunction(objN.h), true);
var h = n().h;
assertEq(CanBeConstructed(h), true, "asm.js functions can't be constructed");
// h is a ctor returning an primitive value, thus an empty object
assertEq(Object.getOwnPropertyNames(new h).length, 0);
assertEq(typeof(function() {"use asm"; return {}}.prototype) !== 'undefined', true);
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