Merge pull request #5 from dminor/add-initial-spec-text

Add some initial spec text

Author: mgaudet

spec.emu

@@ -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>