97 lines
3.1 KiB
C
97 lines
3.1 KiB
C
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/*
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* Proxy built-in (ES2015)
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*/
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#include "duk_internal.h"
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#if defined(DUK_USE_ES6_PROXY)
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/* Post-process a Proxy ownKeys() result at stack top. Push a cleaned up
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* array of valid result keys (strings or symbols). TypeError for invalid
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* values. Flags are shared with duk_enum().
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*/
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DUK_INTERNAL void duk_proxy_ownkeys_postprocess(duk_hthread *thr, duk_hobject *h_proxy_target, duk_uint_t flags) {
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duk_uarridx_t i, len, idx;
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duk_propdesc desc;
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DUK_CTX_ASSERT_VALID(thr);
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DUK_ASSERT(h_proxy_target != NULL);
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len = (duk_uarridx_t) duk_get_length(thr, -1);
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idx = 0;
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duk_push_array(thr);
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/* XXX: preallocated dense array, fill in directly */
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for (i = 0; i < len; i++) {
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duk_hstring *h;
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/* [ obj trap_result res_arr ] */
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(void) duk_get_prop_index(thr, -2, i);
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h = duk_get_hstring(thr, -1);
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if (h == NULL) {
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DUK_ERROR_TYPE_INVALID_TRAP_RESULT(thr);
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DUK_WO_NORETURN(return;);
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}
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if (!(flags & DUK_ENUM_INCLUDE_NONENUMERABLE)) {
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/* No support for 'getOwnPropertyDescriptor' trap yet,
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* so check enumerability always from target object
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* descriptor.
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*/
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if (duk_hobject_get_own_propdesc(thr, h_proxy_target, duk_known_hstring(thr, -1), &desc, 0 /*flags*/)) {
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if ((desc.flags & DUK_PROPDESC_FLAG_ENUMERABLE) == 0) {
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DUK_DDD(DUK_DDDPRINT("ignore non-enumerable property: %!T", duk_get_tval(thr, -1)));
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goto skip_key;
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}
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} else {
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DUK_DDD(DUK_DDDPRINT("ignore non-existent property: %!T", duk_get_tval(thr, -1)));
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goto skip_key;
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}
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}
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if (DUK_UNLIKELY(DUK_HSTRING_HAS_SYMBOL(h))) {
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if (!(flags & DUK_ENUM_INCLUDE_SYMBOLS)) {
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DUK_DDD(DUK_DDDPRINT("ignore symbol property: %!T", duk_get_tval(thr, -1)));
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goto skip_key;
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}
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if (DUK_HSTRING_HAS_HIDDEN(h) && !(flags & DUK_ENUM_INCLUDE_HIDDEN)) {
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DUK_DDD(DUK_DDDPRINT("ignore hidden symbol property: %!T", duk_get_tval(thr, -1)));
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goto skip_key;
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}
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} else {
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if (flags & DUK_ENUM_EXCLUDE_STRINGS) {
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DUK_DDD(DUK_DDDPRINT("ignore string property: %!T", duk_get_tval(thr, -1)));
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goto skip_key;
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}
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}
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/* [ obj trap_result res_arr propname ] */
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duk_put_prop_index(thr, -2, idx++);
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continue;
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skip_key:
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duk_pop(thr);
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continue;
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}
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/* XXX: Missing trap result validation for non-configurable target keys
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* (must be present), for non-extensible target all target keys must be
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* present and no extra keys can be present.
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* http://www.ecma-international.org/ecma-262/6.0/#sec-proxy-object-internal-methods-and-internal-slots-ownpropertykeys
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*/
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/* XXX: The key enumerability check should trigger the "getOwnPropertyDescriptor"
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* trap which has not yet been implemented. In the absence of such a trap,
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* the enumerability should be checked from the target object; this is
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* handled above.
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*/
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}
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#endif /* DUK_USE_ES6_PROXY */
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#if defined(DUK_USE_ES6_PROXY)
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DUK_INTERNAL duk_ret_t duk_bi_proxy_constructor(duk_hthread *thr) {
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DUK_ASSERT_TOP(thr, 2); /* [ target handler ] */
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duk_require_constructor_call(thr);
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duk_push_proxy(thr, 0 /*flags*/); /* [ target handler ] -> [ proxy ] */
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return 1; /* replacement */
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}
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#endif /* DUK_USE_ES6_PROXY */
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