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LibJS: Add spec comments to get_this_environment()

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Linus Groh 2022-12-12 21:17:24 +00:00
parent c6638f53c0
commit 19ea0d8dcf
1 changed files with 8 additions and 0 deletions
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8
Userland/Libraries/LibJS/Runtime/AbstractOperations.cpp
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@ -445,9 +445,17 @@ PrivateEnvironment* new_private_environment(VM& vm, PrivateEnvironment* outer)
// 9.4.3 GetThisEnvironment ( ), https://tc39.es/ecma262/#sec-getthisenvironment // 9.4.3 GetThisEnvironment ( ), https://tc39.es/ecma262/#sec-getthisenvironment
Environment& get_this_environment(VM& vm) Environment& get_this_environment(VM& vm)
{ {
// 1. Let env be the running execution context's LexicalEnvironment.
// 2. Repeat,
for (auto* env = vm.lexical_environment(); env; env = env->outer_environment()) { for (auto* env = vm.lexical_environment(); env; env = env->outer_environment()) {
// a. Let exists be env.HasThisBinding().
// b. If exists is true, return env.
if (env->has_this_binding()) if (env->has_this_binding())
return *env; return *env;
// c. Let outer be env.[[OuterEnv]].
// d. Assert: outer is not null.
// e. Set env to outer.
} }
VERIFY_NOT_REACHED(); VERIFY_NOT_REACHED();
} }