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[css-syntax] Remove old an+b parsing section.
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‎css-syntax/Overview.html‎

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@@ -313,9 +313,6 @@ <h2 class="no-num no-toc" id=contents> Table of contents</h2>
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<li><a href="#parse-a-comma-separated-list-of-componen"><span
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class=secno>5.4.6. </span> Parse a comma-separated list of component
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values</a>
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<li><a href="#parse-anb-notation"><span class=secno>5.4.7. </span>
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Parse an+b notation</a>
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</ul>
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<li><a href="#parser-algorithms"><span class=secno>5.5. </span> Parser
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<var>val</var>, and return <var>val</var>.
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</ol>
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<h4 id=parse-anb-notation><span class=secno>5.4.7. </span> <dfn
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id=parse-anb-notation0>Parse an+b notation</dfn></h4>
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<p> To <a href="#parse-anb-notation0"><i>parse an+b notation</i></a>:
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<p> Initialize an integer called <var>step</var> to 0, an integer called
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<var>offset</var> to 0, and a string called <var>repr</var> to the empty
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string.
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<p> Repeatedly consume the <a href="#next-input-token"><i>next input
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token</i></a> and process it as follows:
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<dl>
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<dt>ident token
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<dt>number token with its type flag set to "integer"
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<dt>dimension token
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<dd> Append the token's value, representation, or representation and unit,
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respectively, to <var>repr</var>.
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<dt>delim token with the value "+"
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<dd> Append U+002B PLUS SIGN (+) to <var>repr</var>.
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<dt>delim token with the value "-"
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<dd> Append U+002D HYPHEN-MINUS (-) to <var>repr</var>.
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<dt>whitespace token
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<dd> Append U+0020 SPACE ( ) to <var>repr</var>.
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<dt>EOF
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<dd> Continue to the next step of the algorithm.
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<dt>anything else
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<dd> This is a <a href="#parse-errors"><i>parse error</i></a>. Return a
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syntax error.
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</dl>
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<p> Trim U+0020 SPACE ( ) characters from the front and back of
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<var>repr</var>, then process it as follows:
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<ol>
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<li> If <var>repr</var> is an <a href="#ascii-case-insensitive"><i>ASCII
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case-insensitive</i></a> match for the string "odd", set <var>step</var>
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to 2 and <var>offset</var> to 1.
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<li> Otherwise, if <var>repr</var> is an <a
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href="#ascii-case-insensitive"><i>ASCII case-insensitive</i></a> match
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for the string "even", set <var>step</var> to 2 and <var>offset</var> to
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0.
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<li> Otherwise, if <var>repr</var> consists solely of <a
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href="#digit"><i>digits</i></a>, optionally prefixed with a single U+002B
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PLUS SIGN (+) or U+002D HYPHEN-MINUS (-), interpret <var>repr</var> as a
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base-10 number, and set <var>step</var> to the result.
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<li> Otherwise, if <var>repr</var> contains U+004E LATIN CAPITAL LETTER N
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(N), or U+006E LATIN SMALL LETTER N (n), split <var>repr</var> into two
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substrings composed respectively of the characters preceding and
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following the first such letter.
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<p> Interpret the first string as follows:
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<ul>
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<li> If the first string is empty, set <var>step</var> to 1.
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<li> Otherwise, if the first string consists solely of a single U+002B
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PLUS SIGN (+) or U+002D HYPHEN-MINUS (-), set <var>step</var> to 1 or
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-1, respectively.
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<li> Otherwise, if the first string consists solely of <a
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href="#digit"><i>digits</i></a>, optionally prefixed with a single
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U+002B PLUS SIGN (+) or U+002D HYPHEN-MINUS (-), interpret the first
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string as a base-10 number, and set <var>step</var> to the result.
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<li> Otherwise, this is a <a href="#parse-errors"><i>parse
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error</i></a>; return a syntax error.
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</ul>
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<p> Interpret the second string as follows:
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<ul>
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<li> If the second string is empty, set <var>offset</var> to 0.
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<li> Otherwise, if the second string consists solely of 0 or more U+0020
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SPACE characters, optionally followed by a single U+002B PLUS SIGN (+)
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or U+002D HYPHEN-MINUS (-) character, followed by 0 or more U+0020
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SPACE characters, followed by 1 or more <a
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href="#digit"><i>digits</i></a>, interpret the digits as a base-10
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number. If there was a U+002D HYPHEN-MINUS (-) character, negate the
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result. Set <var>offset</var> to the result.
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<li> Otherwise, this is a <a href="#parse-errors"><i>parse
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error</i></a>; return a syntax error.
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</ul>
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<li> Otherwise, this is a <a href="#parse-errors"><i>parse error</i></a>;
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return a syntax error.
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</ol>
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<p> Return <var>step</var> and <var>offset</var>.
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<h3 id=parser-algorithms><span class=secno>5.5. </span> Parser Algorithms</h3>
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<p> The following algorithms comprise the parser. They are called by the
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<li>Parse a list of declarations, <a href="#parse-a-list-of-declarations0"
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title="section 5.4.3."><strong>5.4.3.</strong></a>
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<li>Parse an+b notation, <a href="#parse-anb-notation0"
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title="section 5.4.7."><strong>5.4.7.</strong></a>
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<li>Parse a rule, <a href="#parse-a-rule0"
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title="section 5.4.2."><strong>5.4.2.</strong></a>
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‎css-syntax/Overview.src.html‎

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@@ -2518,143 +2518,6 @@ <h4>
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and return <var>val</var>.
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</ol>
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<h4>
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<dfn>Parse an+b notation</dfn></h4>
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<p>
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To <i>parse an+b notation</i>:
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<p>
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Initialize an integer called <var>step</var> to 0,
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an integer called <var>offset</var> to 0,
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and a string called <var>repr</var> to the empty string.
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<p>
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Repeatedly consume the <i>next input token</i>
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and process it as follows:
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<dl>
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<dt>ident token
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<dt>number token with its type flag set to "integer"
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<dt>dimension token
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<dd>
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Append the token's value, representation, or representation and unit, respectively, to <var>repr</var>.
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<dt>delim token with the value "+"
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<dd>
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Append U+002B PLUS SIGN (+) to <var>repr</var>.
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<dt>delim token with the value "-"
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<dd>
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Append U+002D HYPHEN-MINUS (-) to <var>repr</var>.
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<dt>whitespace token
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<dd>
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Append U+0020 SPACE ( ) to <var>repr</var>.
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<dt>EOF
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<dd>
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Continue to the next step of the algorithm.
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<dt>anything else
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<dd>
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This is a <i>parse error</i>.
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Return a syntax error.
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</dl>
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<p>
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Trim U+0020 SPACE ( ) characters from the front and back of <var>repr</var>,
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then process it as follows:
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<ol>
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<li>
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If <var>repr</var> is an <i>ASCII case-insensitive</i> match
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for the string "odd",
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set <var>step</var> to 2
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and <var>offset</var> to 1.
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<li>
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Otherwise, if <var>repr</var> is an <i>ASCII case-insensitive</i> match
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for the string "even",
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set <var>step</var> to 2
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and <var>offset</var> to 0.
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<li>
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Otherwise, if <var>repr</var> consists solely of <i>digits</i>,
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optionally prefixed with a single
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U+002B PLUS SIGN (+)
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or U+002D HYPHEN-MINUS (-),
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interpret <var>repr</var> as a base-10 number,
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and set <var>step</var> to the result.
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<li>
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Otherwise, if <var>repr</var> contains
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U+004E LATIN CAPITAL LETTER N (N),
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or U+006E LATIN SMALL LETTER N (n),
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split <var>repr</var> into two substrings
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composed respectively of the characters preceding and following the first such letter.
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<p>
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Interpret the first string as follows:
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<ul>
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<li>
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If the first string is empty,
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set <var>step</var> to 1.
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<li>
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Otherwise, if the first string consists solely of a single
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U+002B PLUS SIGN (+)
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or U+002D HYPHEN-MINUS (-),
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set <var>step</var> to 1 or -1, respectively.
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<li>
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Otherwise, if the first string consists solely of <i>digits</i>,
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optionally prefixed with a single
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U+002B PLUS SIGN (+)
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or U+002D HYPHEN-MINUS (-),
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interpret the first string as a base-10 number,
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and set <var>step</var> to the result.
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<li>
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Otherwise, this is a <i>parse error</i>;
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return a syntax error.
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</ul>
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<p>
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Interpret the second string as follows:
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<ul>
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<li>
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If the second string is empty,
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set <var>offset</var> to 0.
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<li>
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Otherwise, if the second string consists solely of
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0 or more U+0020 SPACE characters,
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optionally followed by a single
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U+002B PLUS SIGN (+)
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or U+002D HYPHEN-MINUS (-) character,
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followed by 0 or more U+0020 SPACE characters,
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followed by 1 or more <i>digits</i>,
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interpret the digits as a base-10 number.
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If there was a U+002D HYPHEN-MINUS (-) character,
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negate the result.
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Set <var>offset</var> to the result.
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<li>
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Otherwise, this is a <i>parse error</i>;
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return a syntax error.
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</ul>
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<li>
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Otherwise, this is a <i>parse error</i>;
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return a syntax error.
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</ol>
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<p>
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Return <var>step</var> and <var>offset</var>.
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<h3>
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Parser Algorithms</h3>
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