[css-syntax] Dont' do <urange> fixup, instead just make it invalid.

Author: tabatkins

css-syntax/Overview.bs

@@ -2908,15 +2908,15 @@ The <<urange>> type</h3>
 	In this production,
 	no whitespace can occur between any of the tokens.
 
-	The <<urange>> production represents a range of one or more contiguous unicode code points,
+	The <<urange>> production represents a range of one or more contiguous unicode code points
+	as a <var>start value</var> and an <var>end value</var>,
 	which are non-negative integers.
 	Each clause of the above grammar is interpreted as follows:
 
 	: <code>u '+' <<urange-codepoint>></code>
 	::
 		<a title="interpret a token as a hex integer">Interpret the &lt;urange-codepoint> as a hex integer</a>.
 		Let <var>start value</var> and <var>end value</var> both be the returned value.
-
 	: <code>u '+' <<urange-codepoint>>? '?'+</code>
 	::
 		If the <<urange-codepoint>> is specified,
@@ -2926,13 +2926,10 @@ The <<urange>> type</h3>
 
 		Let <var>start value</var> be <code style="white-space: nowrap">B✕(16<sup>S</sup>)</code>.
 		Let <var>end value</var> be <code style="white-space: nowrap">B✕(16<sup>S</sup>) + 16<sup>S+1</sup> − 1</code>.
-
 	: <code>u '+' <<urange-codepoint>> <<negative-urange-codepoint>></code>
 	::
 		Let <var>start value</var> be the result of <a title="interpret a token as a hex integer">interpreting the &lt;urange-codepoint> as a hex integer</a>.
 		Let <var>end value</var> be the negation of the result of <a title="interpret a token as a hex integer">interpreting the &lt;negative-urange-codepoint> as a hex integer</a>.
-
-
 	: <code>u '+' <<urange-range>></code>
 	::
 		Split the <<urange-range>>’s representation (or representation + unit)
@@ -2945,10 +2942,10 @@ The <<urange>> type</h3>
 	To determine what codepoints the <<urange>> represents:
 
 	1. If <var>end value</var> is greater than the <a>maximum allowed code point</a>,
-		set it to the <a>maximum allowed code point</a>.
+		the <<urange>> is invalid and a syntax error.
 
 	2. If <var>start value</var> is greater than <var>end value</var>,
-		the <<urange>> represents an empty range of codepoints.
+		the <<urange>> is invalid and a syntax error.
 
 	3. Otherwise, the <<urange>> represents a contiguous range of codepoints from <var>start value</var> to <var>end value</var>, inclusive.
 

css-syntax/Overview.html

@@ -4241,15 +4241,15 @@ <h3 class="heading settled" data-level=7.1 id=urange-syntax><span class=secno>7.
 <p>In this production,
 	no whitespace can occur between any of the tokens.</p>
 
-<p>The <a class="production css" data-link-type=type href=#typedef-urange title="<urange>">&lt;urange&gt;</a> production represents a range of one or more contiguous unicode code points,
+<p>The <a class="production css" data-link-type=type href=#typedef-urange title="<urange>">&lt;urange&gt;</a> production represents a range of one or more contiguous unicode code points
+	as a <var>start value</var> and an <var>end value</var>,
 	which are non-negative integers.
 	Each clause of the above grammar is interpreted as follows:</p>
 
 <dl><dt data-md=""><p><code>u '+' <a class="production css" data-link-type=type href=#typedef-urange-codepoint title="<urange-codepoint>">&lt;urange-codepoint&gt;</a></code></p>
 <dd data-md="">
 <p><a data-link-type=dfn href=#interpret-a-token-as-a-hex-integer title="interpret a token as a hex integer">Interpret the &lt;urange-codepoint&gt; as a hex integer</a>.
 Let <var>start value</var> and <var>end value</var> both be the returned value.</p>
-
 <dt data-md=""><p><code>u '+' <a class="production css" data-link-type=type href=#typedef-urange-codepoint title="<urange-codepoint>">&lt;urange-codepoint&gt;</a>? '?'+</code></p>
 <dd data-md="">
 <p>If the <a class="production css" data-link-type=type href=#typedef-urange-codepoint title="<urange-codepoint>">&lt;urange-codepoint&gt;</a> is specified,
@@ -4259,13 +4259,10 @@ <h3 class="heading settled" data-level=7.1 id=urange-syntax><span class=secno>7.
 
 <p>Let <var>start value</var> be <code style="white-space: nowrap">B✕(16<sup>S</sup>)</code>.
 Let <var>end value</var> be <code style="white-space: nowrap">B✕(16<sup>S</sup>) + 16<sup>S+1</sup> − 1</code>.</p>
-
 <dt data-md=""><p><code>u '+' <a class="production css" data-link-type=type href=#typedef-urange-codepoint title="<urange-codepoint>">&lt;urange-codepoint&gt;</a> <a class="production css" data-link-type=type href=#typedef-negative-urange-codepoint title="<negative-urange-codepoint>">&lt;negative-urange-codepoint&gt;</a></code></p>
 <dd data-md="">
 <p>Let <var>start value</var> be the result of <a data-link-type=dfn href=#interpret-a-token-as-a-hex-integer title="interpret a token as a hex integer">interpreting the &lt;urange-codepoint&gt; as a hex integer</a>.
 Let <var>end value</var> be the negation of the result of <a data-link-type=dfn href=#interpret-a-token-as-a-hex-integer title="interpret a token as a hex integer">interpreting the &lt;negative-urange-codepoint&gt; as a hex integer</a>.</p>
-
-
 <dt data-md=""><p><code>u '+' <a class="production css" data-link-type=type href=#typedef-urange-range title="<urange-range>">&lt;urange-range&gt;</a></code></p>
 <dd data-md="">
 <p>Split the <a class="production css" data-link-type=type href=#typedef-urange-range title="<urange-range>">&lt;urange-range&gt;</a>’s representation (or representation + unit)
@@ -4278,10 +4275,10 @@ <h3 class="heading settled" data-level=7.1 id=urange-syntax><span class=secno>7.
 <p>To determine what codepoints the <a class="production css" data-link-type=type href=#typedef-urange title="<urange>">&lt;urange&gt;</a> represents:</p>
 
 <ol><li data-md=""><p>If <var>end value</var> is greater than the <a data-link-type=dfn href=#maximum-allowed-code-point title="maximum allowed code point">maximum allowed code point</a>,
-set it to the <a data-link-type=dfn href=#maximum-allowed-code-point title="maximum allowed code point">maximum allowed code point</a>.</p>
+the <a class="production css" data-link-type=type href=#typedef-urange title="<urange>">&lt;urange&gt;</a> is invalid and a syntax error.</p>
 
 <li data-md=""><p>If <var>start value</var> is greater than <var>end value</var>,
-the <a class="production css" data-link-type=type href=#typedef-urange title="<urange>">&lt;urange&gt;</a> represents an empty range of codepoints.</p>
+the <a class="production css" data-link-type=type href=#typedef-urange title="<urange>">&lt;urange&gt;</a> is invalid and a syntax error.</p>
 
 <li data-md=""><p>Otherwise, the <a class="production css" data-link-type=type href=#typedef-urange title="<urange>">&lt;urange&gt;</a> represents a contiguous range of codepoints from <var>start value</var> to <var>end value</var>, inclusive.</p>
 </ol>