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Merged
merged 2 commits into from
Jun 10, 2025
Merged

Add some initial spec text #5

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0ada657
Initial spec text
dminor Jun 6, 2025
da19be5
Fix optional argument
dminor Jun 10, 2025
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65 changes: 36 additions & 29 deletions spec.emu
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Original file line number Diff line number Diff line change
Expand Up @@ -4,36 +4,43 @@
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/8.4/styles/github.min.css">
<script src="./spec.js"></script>
<pre class="metadata">
title: Proposal Title Goes Here
stage: -1
contributors: Your Name(s) Here
title: Error.captureStackTrace
stage: 1
contributors: Daniel Minor
markEffects: true
</pre>

<emu-clause id="sec-demo-clause">
<h1>This is an emu-clause</h1>
<p>This is an algorithm:</p>
<emu-alg>
1. Let _proposal_ be *undefined*.
1. If IsAccepted(_proposal_) is *true*, then
1. Let _stage_ be *0*<sub>ℤ</sub>.
1. Else,
1. Let _stage_ be *-1*<sub>ℤ</sub>.
1. Return ? ToString(_stage_).
</emu-alg>
</emu-clause>
<emu-intro id="intro">
<h1>Introduction</h1>
<p></p>
</emu-intro>

<emu-clause id="sec-fundamental-objects" number="20">
<h1>Fundamental Objects</h1>

<emu-clause id="sec-error-objects" number="5">
<h1>Error Objects</h1>

<emu-clause id="sec-properties-of-the-error-constructor" number="2">
<h1>Properties of the Error Constructor</h1>

<emu-clause id="sec-is-accepted" type="abstract operation">
<h1>
IsAccepted (
_proposal_: an ECMAScript language value
): a Boolean
</h1>
<dl class="header">
<dt>description</dt>
<dd>Tells you if the proposal was accepted</dd>
</dl>
<emu-alg>
1. If _proposal_ is not a String, or is not accepted, return *false*.
1. Return *true*.
</emu-alg>
<emu-clause id="sec-error.capturestacktrace">
<h1>Error.captureStackTrace ( _error_ [ , _constructor_ ])</h1>
<emu-alg>
1. If _error_ is not an Object, throw a *TypeError* exception.
1. If _constructor_ is not *undefined*, then
1. If IsCallable(_constructor_) is *false*, throw a *TypeError* exception.
1. TODO: No implementations currently check that _constructor_ is callable, this may not be web compatible.
1. If IsCallable(_constructor_) is *true*, then
1. Let _string_ be an implementation-defined string that represents the current stack trace, with all stack
frames above the topmost call to _constructor_, including that call, omitted from the stack trace.
1. NOTE: This can be used to hide implementation details on the stack trace that aren't useful to user.
1. Else,
1. Let _string_ be an implementation-defined string that represents the current stack trace.
1. Perform ? SetterThatIgnoresPrototypeProperties(*this* value, _error_, *"stack"*, _string_).
1. Return *undefined*.
</emu-alg>
</emu-clause>
</emu-clause>
</emu-clause>
</emu-clause>