diff --git a/spec.html b/spec.html index bb5931013d..ffdc1d7556 100644 --- a/spec.html +++ b/spec.html @@ -28936,7 +28936,7 @@

1. If _x_ is not a String, return _x_. 1. Let _evalRealm_ be the current Realm Record. 1. NOTE: In the case of a direct eval, _evalRealm_ is the realm of both the caller of `eval` and of the `eval` function itself. - 1. Perform ? HostEnsureCanCompileStrings(_evalRealm_). + 1. Perform ? HostEnsureCanCompileStrings(_evalRealm_, « », _x_, _direct_). 1. Let _inFunction_ be *false*. 1. Let _inMethod_ be *false*. 1. Let _inDerivedConstructor_ be *false*. @@ -28999,12 +28999,19 @@

HostEnsureCanCompileStrings ( _calleeRealm_: a Realm Record, + _parameterStrings_: a List of Strings, + _bodyString_: a String, + _direct_: a Boolean, ): either a normal completion containing ~unused~ or a throw completion

description
It allows host environments to block certain ECMAScript functions which allow developers to interpret and evaluate strings as ECMAScript code.
+

+ _parameterStrings_ represents the strings that, when using one of the function constructors, will be concatenated together to build the parameters list. _bodyString_ represents the function body or the string passed to an `eval` call. + _direct_ signifies whether the evaluation is a direct eval. +

The default implementation of HostEnsureCanCompileStrings is to return NormalCompletion(~unused~).

@@ -30209,8 +30216,6 @@

_constructor_ is the constructor function that is performing this action. _newTarget_ is the constructor that `new` was initially applied to. _parameterArgs_ and _bodyArg_ reflect the argument values that were passed to _constructor_.
- 1. Let _currentRealm_ be the current Realm Record. - 1. Perform ? HostEnsureCanCompileStrings(_currentRealm_). 1. If _newTarget_ is *undefined*, set _newTarget_ to _constructor_. 1. If _kind_ is ~normal~, then 1. Let _prefix_ be *"function"*. @@ -30238,22 +30243,26 @@

1. Let _parameterSym_ be the grammar symbol |FormalParameters[+Yield, +Await]|. 1. Let _fallbackProto_ be *"%AsyncGeneratorFunction.prototype%"*. 1. Let _argCount_ be the number of elements in _parameterArgs_. + 1. Let _bodyString_ be ? ToString(_bodyArg_). + 1. Let _parameterStrings_ be a new empty List. + 1. For each element _arg_ of _parameterArgs_, do + 1. Append ? ToString(_arg_) to _parameterStrings_. + 1. Let _currentRealm_ be the current Realm Record. + 1. Perform ? HostEnsureCanCompileStrings(_currentRealm_, _parameterStrings_, _bodyString_, *false*). 1. Let _P_ be the empty String. 1. If _argCount_ > 0, then - 1. Let _firstArg_ be _parameterArgs_[0]. - 1. Set _P_ to ? ToString(_firstArg_). + 1. Set _P_ to _parameterStrings_[0]. 1. Let _k_ be 1. 1. Repeat, while _k_ < _argCount_, - 1. Let _nextArg_ be _parameterArgs_[_k_]. - 1. Let _nextArgString_ be ? ToString(_nextArg_). + 1. Let _nextArgString_ be _parameterStrings_[_k_]. 1. Set _P_ to the string-concatenation of _P_, *","* (a comma), and _nextArgString_. 1. Set _k_ to _k_ + 1. - 1. Let _bodyString_ be the string-concatenation of 0x000A (LINE FEED), ? ToString(_bodyArg_), and 0x000A (LINE FEED). - 1. Let _sourceString_ be the string-concatenation of _prefix_, *" anonymous("*, _P_, 0x000A (LINE FEED), *") {"*, _bodyString_, and *"}"*. + 1. Let _bodyParseString_ be the string-concatenation of 0x000A (LINE FEED), _bodyString_, and 0x000A (LINE FEED). + 1. Let _sourceString_ be the string-concatenation of _prefix_, *" anonymous("*, _P_, 0x000A (LINE FEED), *") {"*, _bodyParseString_, and *"}"*. 1. Let _sourceText_ be StringToCodePoints(_sourceString_). 1. Let _parameters_ be ParseText(StringToCodePoints(_P_), _parameterSym_). 1. If _parameters_ is a List of errors, throw a *SyntaxError* exception. - 1. Let _body_ be ParseText(StringToCodePoints(_bodyString_), _bodySym_). + 1. Let _body_ be ParseText(StringToCodePoints(_bodyParseString_), _bodySym_). 1. If _body_ is a List of errors, throw a *SyntaxError* exception. 1. NOTE: The parameters and body are parsed separately to ensure that each is valid alone. For example, `new Function("/*", "*/ ) {")` does not evaluate to a function. 1. NOTE: If this step is reached, _sourceText_ must have the syntax of _exprSym_ (although the reverse implication does not hold). The purpose of the next two steps is to enforce any Early Error rules which apply to _exprSym_ directly.