commons-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From d...@apache.org
Subject cvs commit: jakarta-commons/jexl/xdocs/reference syntax.xml
Date Sun, 22 Aug 2004 01:53:44 GMT
dion        2004/08/21 18:53:44

  Modified:    jexl/xdocs/reference syntax.xml
  Log:
  Document most syntax
  
  Revision  Changes    Path
  1.6       +158 -1    jakarta-commons/jexl/xdocs/reference/syntax.xml
  
  Index: syntax.xml
  ===================================================================
  RCS file: /home/cvs/jakarta-commons/jexl/xdocs/reference/syntax.xml,v
  retrieving revision 1.5
  retrieving revision 1.6
  diff -u -r1.5 -r1.6
  --- syntax.xml	20 Aug 2004 06:09:05 -0000	1.5
  +++ syntax.xml	22 Aug 2004 01:53:44 -0000	1.6
  @@ -50,10 +50,35 @@
               e.g.
               <ul>
                 <li>Valid: <code>var1</code>,<code>_a99</code>,<code>$1</code></li>
  -              <li>Inalid: <code>9v</code>,<code>!a99</code>,<code>1$</code></li>
  +              <li>Invalid: <code>9v</code>,<code>!a99</code>,<code>1$</code></li>
               </ul>
             </td>
           </tr>
  +        <tr>
  +          <td>Scripts</td>
  +          <td>
  +            A script in Jexl is made up of zero or more statements.
  +          </td>
  +        </tr>
  +        <tr>
  +          <td>Statements</td>
  +          <td>
  +            A statement can be the empty statement, the semicolon (<code>;</code>)
,  block, assignment or an expression.
  +            Statements are optionally terminated with a semicolon.
  +          </td>
  +        </tr>
  +        <tr>
  +          <td>Block</td>
  +          <td>
  +            A block is simply multiple statements inside curly braces (<code>{, }</code>).
  +          </td>
  +        </tr>
  +        <tr>
  +          <td>Assigment</td>
  +          <td>
  +            Assignment sets a variable to a given value using the <code>=</code>
operator.
  +          </td>
  +        </tr>
         </table>
       </section>
       <section name="Literals">
  @@ -79,6 +104,20 @@
               <source>'Hello world'</source> are equivalent.
             </td>
           </tr>
  +        <tr>
  +          <td>Boolean literals</td>
  +          <td>
  +            The literals <code>true</code> and <code>false</code>
can be used, e.g.
  +            <source>val1 == true</source>
  +          </td>
  +        </tr>
  +        <tr>
  +          <td>Null literal</td>
  +          <td>
  +            The null value is represented as in java using the literal <code>null</code>,
e.g.
  +            <source>val1 == null</source>
  +          </td>
  +        </tr>
         </table>
       </section>
       <section name="Functions">
  @@ -143,6 +182,124 @@
               The usual <code>!</code> operator can be used as well as the word
<code>not</code>, e.g.
               <source>!cond1</source> and
               <source>not cond1</source> are equivalent
  +          </td>
  +        </tr>
  +        <tr>
  +          <td>Equality</td>
  +          <td>
  +            The usual <code>==</code> operator can be used as well as the abbreviation
<code>eq</code>.
  +            For example
  +            <source>val1 == val2</source> and
  +            <source>val1 eq val2</source> are equivalent.
  +            <ol>
  +              <li>
  +                <code>null</code> is only ever equal to null, that is if you
compare null
  +                to any non-null value, the result is false.
  +              </li>
  +              <li>Equality uses the java <code>equals</code> method</li>
  +            </ol>
  +          </td>
  +        </tr>
  +        <tr>
  +          <td>Inequality</td>
  +          <td>
  +            The usual <code>!=</code> operator can be used as well as the abbreviation
<code>ne</code>.
  +            For example
  +            <source>val1 != val2</source> and
  +            <source>val1 ne val2</source> are equivalent.
  +          </td>
  +        </tr>
  +        <tr>
  +          <td>Less Than</td>
  +          <td>
  +            The usual <code>&lt;</code> operator can be used as well as
the abbreviation <code>lt</code>.
  +            For example
  +            <source>val1 &lt; val2</source> and
  +            <source>val1 lt val2</source> are equivalent.
  +          </td>
  +        </tr>
  +        <tr>
  +          <td>Less Than Or Equal To</td>
  +          <td>
  +            The usual <code>&lt;=</code> operator can be used as well as
the abbreviation <code>le</code>.
  +            For example
  +            <source>val1 &lt;= val2</source> and
  +            <source>val1 le val2</source> are equivalent.
  +          </td>
  +        </tr>
  +        <tr>
  +          <td>Greater Than</td>
  +          <td>
  +            The usual <code>&gt;</code> operator can be used as well as
the abbreviation <code>gt</code>.
  +            For example
  +            <source>val1 &gt; val2</source> and
  +            <source>val1 gt val2</source> are equivalent.
  +          </td>
  +        </tr>
  +        <tr>
  +          <td>Greater Than Or Equal To</td>
  +          <td>
  +            The usual <code>&gt;=</code> operator can be used as well as
the abbreviation <code>ge</code>.
  +            For example
  +            <source>val1 &gt;= val2</source> and
  +            <source>val1 ge val2</source> are equivalent.
  +          </td>
  +        </tr>
  +        <tr>
  +          <td>Addition</td>
  +          <td>
  +            The usual <code>+</code> operator is used.
  +            For example
  +            <source>val1 + val2</source>.
  +          </td>
  +        </tr>
  +        <tr>
  +          <td>Subtraction</td>
  +          <td>
  +            The usual <code>-</code> operator is used.
  +            For example
  +            <source>val1 - val2</source>.
  +          </td>
  +        </tr>
  +        <tr>
  +          <td>Multiplication</td>
  +          <td>
  +            The usual <code>*</code> operator is used.
  +            For example
  +            <source>val1 * val2</source>.
  +          </td>
  +        </tr>
  +        <tr>
  +          <td>Division</td>
  +          <td>
  +            The usual <code>/</code> operator is used.
  +            For example
  +            <source>val1 / val2</source>.
  +          </td>
  +        </tr>
  +        <tr>
  +          <td>Integer Division</td>
  +          <td>
  +            The <code>div</code> operator is used.
  +            For example
  +            <source>4 div 3</source> gives 1.
  +          </td>
  +        </tr>
  +        <tr>
  +          <td>Modulus (or remainder)</td>
  +          <td>
  +            The <code>%</code> operator is used. An alternative is the <code>mod</code>
  +            operator.
  +            For example
  +            <source>5 mod 2</source> gives 1 and is equivalent to <source>5
% 2</source>
  +          </td>
  +        </tr>
  +        <tr>
  +          <td>Negation</td>
  +          <td>
  +            The unary <code>-</code> operator is used.
  +            For example
  +            <source>-12</source>.
             </td>
           </tr>
         </table>
  
  
  

---------------------------------------------------------------------
To unsubscribe, e-mail: commons-dev-unsubscribe@jakarta.apache.org
For additional commands, e-mail: commons-dev-help@jakarta.apache.org


Mime
View raw message