30bb38c4bb
When convert a const, let or any other block-bound binding to a var we forget to update the scope info. This confuses other transforms that may come after this as to which scope does the binding belongs to. This also uncovered an issue where duplicate block-scoped bindings were allowed to co-exist.
40 lines
829 B
JavaScript
40 lines
829 B
JavaScript
var code = [
|
|
'var foo = 1;',
|
|
'if (x) {',
|
|
' const bar = 1;',
|
|
'}',
|
|
].join('\n');
|
|
|
|
var innerScope = true;
|
|
var res = transform(code, {
|
|
plugins: opts.plugins.concat([
|
|
function (b) {
|
|
var t = b.types;
|
|
return {
|
|
visitor: {
|
|
Scope: {
|
|
exit: function(path) {
|
|
if (innerScope) {
|
|
assert(Object.keys(path.scope.bindings).length === 0, 'Inner scope should not have any bindings');
|
|
innerScope = false;
|
|
return;
|
|
}
|
|
|
|
assert(Object.keys(path.scope.bindings).length === 2, 'Outer scope subsume the inner-scope binding');
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
]),
|
|
});
|
|
|
|
var expected = [
|
|
'var foo = 1;',
|
|
'if (x) {',
|
|
' var bar = 1;',
|
|
'}',
|
|
].join('\n');
|
|
|
|
assert.equal(res.code, expected);
|