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Switch back to a production parameter #152

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Mar 22, 2023
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Switch back to a production parameter #152

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51 changes: 16 additions & 35 deletions spec.emu
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Original file line number Diff line number Diff line change
Expand Up @@ -2101,7 +2101,7 @@ contributors: Ron Buckton, Ecma International
<h2>Syntax</h2>
<emu-grammar type="definition">
LexicalDeclaration[In, Yield, Await] :
LetOrConst BindingList[?In, ?Yield, ?Await] `;`
LetOrConst BindingList[?In, ?Yield, ?Await, <ins>+Pattern</ins>] `;`
<ins>UsingDeclaration[?In, ?Yield, ?Await]</ins>

LetOrConst :
Expand All @@ -2110,16 +2110,17 @@ contributors: Ron Buckton, Ecma International

<ins>
UsingDeclaration[In, Yield, Await] :
`using` [no LineTerminator here] [lookahead != `await`] BindingList[?In, ?Yield, ?Await] `;`
`using` [no LineTerminator here] [lookahead != `await`] BindingList[?In, ?Yield, ?Await, ~Pattern] `;`
</ins>

BindingList[In, Yield, Await] :
LexicalBinding[?In, ?Yield, ?Await]
BindingList[?In, ?Yield, ?Await] `,` LexicalBinding[?In, ?Yield, ?Await]
BindingList[In, Yield, Await, <ins>Pattern</ins>] :
LexicalBinding[?In, ?Yield, ?Await, <ins>?Pattern</ins>]
BindingList[?In, ?Yield, ?Await, <ins>?Pattern</ins>] `,` LexicalBinding[?In, ?Yield, ?Await, <ins>?Pattern</ins>]

LexicalBinding[In, Yield, Await] :
LexicalBinding[In, Yield, Await, <ins>Pattern</ins>] :
BindingIdentifier[?Yield, ?Await] Initializer[?In, ?Yield, ?Await]?
BindingPattern[?Yield, ?Await] Initializer[?In, ?Yield, ?Await]
<del>BindingPattern[?Yield, ?Await] Initializer[?In, ?Yield, ?Await]</del>
<ins>[+Pattern] BindingPattern[?Yield, ?Await] Initializer[?In, ?Yield, ?Await]</ins>
</emu-grammar>

<emu-clause id="sec-let-and-const-declarations-static-semantics-early-errors">
Expand Down Expand Up @@ -2154,14 +2155,6 @@ contributors: Ron Buckton, Ecma International
</li>
</ul>
</emu-note>
<emu-grammar>
LexicalBinding : BindingPattern Initializer
</emu-grammar>
<ul>
<li>
It is a Syntax Error if IsUsingDeclaration of the |LexicalDeclaration| containing this |LexicalBinding| is *true*.
</li>
</ul>
</ins>
</emu-clause>

Expand Down Expand Up @@ -2389,37 +2382,25 @@ contributors: Ron Buckton, Ecma International
<emu-grammar type="definition">
ForInOfStatement[Yield, Await, Return] :
`for` `(` [lookahead != `let` `[`] LeftHandSideExpression[?Yield, ?Await] `in` Expression[+In, ?Yield, ?Await] `)` Statement[?Yield, ?Await, ?Return]
`for` `(` `var` ForBinding[?Yield, ?Await] `in` Expression[+In, ?Yield, ?Await] `)` Statement[?Yield, ?Await, ?Return]
`for` `(` `var` ForBinding[?Yield, ?Await, <ins>+Pattern</ins>] `in` Expression[+In, ?Yield, ?Await] `)` Statement[?Yield, ?Await, ?Return]
`for` `(` ForDeclaration[?Yield, ?Await, <ins>~Using</ins>] `in` Expression[+In, ?Yield, ?Await] `)` Statement[?Yield, ?Await, ?Return]
`for` `(` [lookahead &notin; {`let`, `async` `of`}] LeftHandSideExpression[?Yield, ?Await] `of` AssignmentExpression[+In, ?Yield, ?Await] `)` Statement[?Yield, ?Await, ?Return]
`for` `(` `var` ForBinding[?Yield, ?Await] `of` AssignmentExpression[+In, ?Yield, ?Await] `)` Statement[?Yield, ?Await, ?Return]
`for` `(` `var` ForBinding[?Yield, ?Await, <ins>+Pattern</ins>] `of` AssignmentExpression[+In, ?Yield, ?Await] `)` Statement[?Yield, ?Await, ?Return]
`for` `(` <ins>[lookahead != `using` `of`]</ins> ForDeclaration[?Yield, ?Await, <ins>+Using</ins>] `of` AssignmentExpression[+In, ?Yield, ?Await] `)` Statement[?Yield, ?Await, ?Return]
[+Await] `for` `await` `(` [lookahead != `let`] LeftHandSideExpression[?Yield, ?Await] `of` AssignmentExpression[+In, ?Yield, ?Await] `)` Statement[?Yield, ?Await, ?Return]
[+Await] `for` `await` `(` `var` ForBinding[?Yield, ?Await] `of` AssignmentExpression[+In, ?Yield, ?Await] `)` Statement[?Yield, ?Await, ?Return]
[+Await] `for` `await` `(` `var` ForBinding[?Yield, ?Await, <ins>+Pattern</ins>] `of` AssignmentExpression[+In, ?Yield, ?Await] `)` Statement[?Yield, ?Await, ?Return]
[+Await] `for` `await` `(` <ins>[lookahead != `using` `of`]</ins> ForDeclaration[?Yield, ?Await, <ins>+Using</ins>] `of` AssignmentExpression[+In, ?Yield, ?Await] `)` Statement[?Yield, ?Await, ?Return]

ForDeclaration[Yield, Await, <ins>Using</ins>] :
LetOrConst ForBinding[?Yield, ?Await]
<ins>[+Using] `using` [no LineTerminator here] [lookahead != `await`] ForBinding[?Yield, ?Await]</ins>
LetOrConst ForBinding[?Yield, ?Await, <ins>+Pattern</ins>]
<ins>[+Using] `using` [no LineTerminator here] [lookahead != `await`] ForBinding[?Yield, ?Await, ~Pattern]</ins>

ForBinding[Yield, Await] :
ForBinding[Yield, Await, <ins>Pattern</ins>] :
BindingIdentifier[?Yield, ?Await]
BindingPattern[?Yield, ?Await]
<del>BindingPattern[?Yield, ?Await]</del>
<ins>[+Pattern] BindingPattern[?Yield, ?Await]</ins>
</emu-grammar>

<emu-clause id="sec-for-in-and-for-of-statements-static-semantics-early-errors">
<h1>Static Semantics: Early Errors</h1>

<ins class="block">
<emu-grammar>ForBinding : BindingPattern</emu-grammar>
<ul>
<li>
It is a Syntax Error if this |ForBinding| is contained within a |ForDeclaration| and IsUsingDeclaration of that |ForDeclaration| is *true*.
</li>
</ul>
</ins>
</emu-clause>

<emu-clause id="sec-runtime-semantics-fordeclarationbindinginstantiation" oldids="sec-runtime-semantics-bindinginstantiation" type="sdo">
<h1>
Runtime Semantics: ForDeclarationBindingInstantiation (
Expand Down