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Improve destructuring patterns (#4527)

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- Fix evaluation order of the operands
- Implement proper iterator closing of array destructuring
- Support next method caching

JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu
This commit is contained in:
Robert Fancsik
2021-02-04 13:11:11 +01:00
committed by GitHub
parent 3bb67397a0
commit e7d11eaf9e
12 changed files with 389 additions and 354 deletions
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tests/jerry/es.next/array-pattern.js
+29 -21
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@@ -38,6 +38,14 @@ function mustThrow (str) {
}
}
function mustNotThrow (str) {
try {
eval (str);
} catch (e) {
assert (false);
}
}
checkSyntax ("var [a]");
checkSyntax ("var [a, o.a]");
checkSyntax ("var [a, ...b,]");
@@ -329,32 +337,32 @@ function __createIterableObject (arr, methods) {
assert (x.prop === "42");
}) ();
mustThrow ("var iter = __createIterableObject([], "
+ "{ get 'return'() { throw new TypeError() }});"
+ "var [a] = iter");
mustThrow (`var iter = __createIterableObject([],
{ get 'return'() { throw new TypeError() }});
var [a] = iter`);
mustThrow ("var iter = __createIterableObject([], "
+ "{ 'return': 5 });"
+ "var [a] = iter");
mustNotThrow (`var iter = __createIterableObject([],
{ 'return': 5 });
var [a] = iter`);
mustThrow ("var iter = __createIterableObject([], "
+ "{ 'return': function() { return 5; }});"
+ "var [a] = iter");
mustNotThrow (`var iter = __createIterableObject([],
{ 'return': function() { return 5; }});
var [a] = iter`);
mustThrow ("try { throw 5 } catch (e) {"
+ "var iter = __createIterableObject([], "
+ "{ get 'return'() { throw new TypeError() }});"
+ "var [a] = iter }");
mustThrow (`try { throw 5 } catch (e) {
var iter = __createIterableObject([],
{ get 'return'() { throw new TypeError() }});
var [a] = iter }`);
mustThrow ("try { throw 5 } catch (e) {"
+ "var iter = __createIterableObject([], "
+ "{ 'return': 5 });"
+ "var [a] = iter }");
mustNotThrow (`try { throw 5 } catch (e) {
var iter = __createIterableObject([],
{ 'return': 5 });
var [a] = iter }`);
mustThrow ("try { throw 5 } catch (e) {"
+ "var iter = __createIterableObject([], "
+ "{ 'return': function() { return 5; }});"
+ "var [a] = iter }");
mustNotThrow (`try { throw 5 } catch (e) {
var iter = __createIterableObject([],
{ 'return': function() { return 5; }});
var [a] = iter }`);
try {
eval ("var a = 0; 1 + [a] = [1]");