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Editorial: replace uses of the Type macro with is-a tests #241

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Oct 31, 2024
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Editorial: replace uses of the Type macro with is-a tests #241

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25 changes: 21 additions & 4 deletions index.bs
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Original file line number Diff line number Diff line change
Expand Up @@ -14,7 +14,6 @@ Markup Shorthands: markdown yes
urlPrefix: https://tc39.github.io/ecma262/#; spec: ECMASCRIPT
type: abstract-op
text: ObjectCreate; url: sec-objectcreate
text: Type; url: sec-ecmascript-data-types-and-values
text: ToString; url: sec-tostring
text: Call; url: sec-call
type: interface
Expand All @@ -24,6 +23,24 @@ urlPrefix: https://tc39.github.io/ecma262/#; spec: ECMASCRIPT
type: dfn
text: %parseFloat%; url: sec-parsefloat-string
text: %parseInt%; url: sec-parseint-string-radix
url: sec-ecmascript-language-types-bigint-type
text: is a BigInt
text: is not a BigInt
url: sec-ecmascript-language-types-boolean-type
text: is a Boolean
text: is not a Boolean
url: sec-ecmascript-language-types-number-type
text: is a Number
text: is not a Number
url: sec-ecmascript-language-types-string-type
text: is a String
text: is not a String
url: sec-ecmascript-language-types-symbol-type
text: is a Symbol
text: is not a Symbol
url: sec-object-type
text: is an Object
text: is not an Object
</pre>

<h2 id="status" class="no-num no-toc">Status</h2>
Expand Down Expand Up @@ -92,7 +109,7 @@ its \[[Prototype]] an empty object, created as if by
1. If |data| is [=list/is empty|empty=], [=list/append=] |message| to |data|.
1. Otherwise:
1. Let |first| be |data|[0].
1. If <a abstract-op>Type</a>(|first|) is not String, then [=list/prepend=] |message| to |data|.
1. If |first| [=is not a String=], then [=list/prepend=] |message| to |data|.
1. Otherwise:
1. Let |concat| be the concatenation of |message|, U+003A (:), U+0020 SPACE, and |first|.
1. Set |data|[0] to |concat|.
Expand Down Expand Up @@ -315,11 +332,11 @@ more arguments are left. It returns a [=/list=] of objects suitable for printing
1. If |specifier| is `%s`, let |converted| be the result of
[$Call$](<a idl>%String%</a>, **undefined**, « |current| »).
1. If |specifier| is `%d` or `%i`:
1. If [$Type$](|current|) is Symbol, let |converted| be `NaN`
1. If |current| [=is a Symbol=], let |converted| be `NaN`
1. Otherwise, let |converted| be the result of
[$Call$]([=%parseInt%=], **undefined**, « |current|, 10 »).
1. If |specifier| is `%f`:
1. If [$Type$](|current|) is Symbol, let |converted| be `NaN`
1. If |current| [=is a Symbol=], let |converted| be `NaN`
1. Otherwise, let |converted| be the result of
[$Call$]([=%parseFloat%=], **undefined**, « |current| »).
1. If |specifier| is `%o`, optionally let |converted| be |current| with
Expand Down
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