mirror of https://github.com/svaarala/duktape.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
144 lines
2.1 KiB
144 lines
2.1 KiB
/*===
|
|
10
|
|
19
|
|
20
|
|
9
|
|
10
|
|
===*/
|
|
|
|
var x = 10;
|
|
print(x);
|
|
print(--x + 10);
|
|
print(++x + 10);
|
|
print(--(x)); // parens are OK
|
|
print(++(x));
|
|
|
|
/*===
|
|
10
|
|
19
|
|
20
|
|
9
|
|
10
|
|
===*/
|
|
|
|
var obj = {x:10};
|
|
print(obj.x);
|
|
print(--obj.x + 10);
|
|
print(++obj.x + 10);
|
|
print(--(obj.x));
|
|
print(++(obj.x));
|
|
|
|
/*===
|
|
should print
|
|
ReferenceError
|
|
===*/
|
|
|
|
/* Invalid LHS parses but causes a run-time ReferenceError.
|
|
*
|
|
* Rhino and V8 don't print 'should print' which seems incorrect: the
|
|
* UnaryExpression should be evaluated before the ReferenceError occurs.
|
|
*/
|
|
|
|
try {
|
|
eval("++print('should print');");
|
|
} catch (e) {
|
|
print(e.name);
|
|
}
|
|
|
|
/*===
|
|
NaN
|
|
NaN
|
|
-1
|
|
1
|
|
-1
|
|
1
|
|
0
|
|
2
|
|
122
|
|
124
|
|
NaN
|
|
NaN
|
|
===*/
|
|
|
|
/* The value is coerced with ToNumber() */
|
|
|
|
var y;
|
|
|
|
y = undefined; print(--y);
|
|
y = undefined; print(++y);
|
|
y = null; print(--y);
|
|
y = null; print(++y);
|
|
y = false; print(--y);
|
|
y = false; print(++y);
|
|
y = true; print(--y); // ToNumber(true) -> 1
|
|
y = true; print(++y);
|
|
y = '123'; print(--y); // ToNumber('123') -> 123
|
|
y = '123'; print(++y);
|
|
y = 'foo'; print(--y); // ToNumber('foo') -> NaN
|
|
y = 'foo'; print(++y);
|
|
|
|
/*===
|
|
999
|
|
999
|
|
1001
|
|
1001
|
|
===*/
|
|
|
|
/* ToNumber() eventually calls valueOf(). Here ToNumber(obj) is thus 1000.
|
|
*/
|
|
|
|
obj = {};
|
|
obj.valueOf = function() {
|
|
return 1000;
|
|
}
|
|
print(--obj);
|
|
print(obj);
|
|
|
|
obj = {};
|
|
obj.valueOf = function() {
|
|
return 1000;
|
|
}
|
|
print(++obj);
|
|
print(obj);
|
|
|
|
|
|
/*===
|
|
eval
|
|
arguments
|
|
SyntaxError
|
|
SyntaxError
|
|
===*/
|
|
|
|
/* Attempt to use 'eval' or 'arguments' as an identifier name is
|
|
* a SyntaxError in strict mode.
|
|
*/
|
|
|
|
var old_eval = eval;
|
|
|
|
try {
|
|
// Note: this will clobber eval
|
|
eval("function f1() { ++eval; --eval; print('eval'); }; f1();");
|
|
} catch (e) {
|
|
print(e.name);
|
|
}
|
|
eval = old_eval;
|
|
|
|
try {
|
|
eval("function f2() { ++arguments; --arguments; print('arguments'); }; f2();");
|
|
} catch (e) {
|
|
print(e.name);
|
|
}
|
|
|
|
try {
|
|
/* Rhino allows this, and clobbers eval in the process. */
|
|
eval("function f3() { 'use strict'; ++eval; --eval; }; f3();");
|
|
} catch (e) {
|
|
print(e.name);
|
|
}
|
|
eval = old_eval; // just in case
|
|
|
|
try {
|
|
eval("function f4() { 'use strict'; ++arguments; --arguments; }; f4();");
|
|
} catch (e) {
|
|
print(e.name);
|
|
}
|
|
|