diff options
Diffstat (limited to 'doc/manual/expressions/language-operators.xml')
| -rw-r--r-- | doc/manual/expressions/language-operators.xml | 222 |
1 files changed, 0 insertions, 222 deletions
diff --git a/doc/manual/expressions/language-operators.xml b/doc/manual/expressions/language-operators.xml deleted file mode 100644 index 4f11bf529..000000000 --- a/doc/manual/expressions/language-operators.xml +++ /dev/null @@ -1,222 +0,0 @@ -<section xmlns="http://docbook.org/ns/docbook" - xmlns:xlink="http://www.w3.org/1999/xlink" - xmlns:xi="http://www.w3.org/2001/XInclude" - version="5.0" - xml:id="sec-language-operators"> - -<title>Operators</title> - -<para><xref linkend='table-operators' /> lists the operators in the -Nix expression language, in order of precedence (from strongest to -weakest binding).</para> - -<table xml:id='table-operators'> - <title>Operators</title> - <tgroup cols='3'> - <thead> - <row> - <entry>Name</entry> - <entry>Syntax</entry> - <entry>Associativity</entry> - <entry>Description</entry> - <entry>Precedence</entry> - </row> - </thead> - <tbody> - <row> - <entry>Select</entry> - <entry><replaceable>e</replaceable> <literal>.</literal> - <replaceable>attrpath</replaceable> - [ <literal>or</literal> <replaceable>def</replaceable> ] - </entry> - <entry>none</entry> - <entry>Select attribute denoted by the attribute path - <replaceable>attrpath</replaceable> from set - <replaceable>e</replaceable>. (An attribute path is a - dot-separated list of attribute names.) If the attribute - doesn’t exist, return <replaceable>def</replaceable> if - provided, otherwise abort evaluation.</entry> - <entry>1</entry> - </row> - <row> - <entry>Application</entry> - <entry><replaceable>e1</replaceable> <replaceable>e2</replaceable></entry> - <entry>left</entry> - <entry>Call function <replaceable>e1</replaceable> with - argument <replaceable>e2</replaceable>.</entry> - <entry>2</entry> - </row> - <row> - <entry>Arithmetic Negation</entry> - <entry><literal>-</literal> <replaceable>e</replaceable></entry> - <entry>none</entry> - <entry>Arithmetic negation.</entry> - <entry>3</entry> - </row> - <row> - <entry>Has Attribute</entry> - <entry><replaceable>e</replaceable> <literal>?</literal> - <replaceable>attrpath</replaceable></entry> - <entry>none</entry> - <entry>Test whether set <replaceable>e</replaceable> contains - the attribute denoted by <replaceable>attrpath</replaceable>; - return <literal>true</literal> or - <literal>false</literal>.</entry> - <entry>4</entry> - </row> - <row> - <entry>List Concatenation</entry> - <entry><replaceable>e1</replaceable> <literal>++</literal> <replaceable>e2</replaceable></entry> - <entry>right</entry> - <entry>List concatenation.</entry> - <entry>5</entry> - </row> - <row> - <entry>Multiplication</entry> - <entry> - <replaceable>e1</replaceable> <literal>*</literal> <replaceable>e2</replaceable>, - </entry> - <entry>left</entry> - <entry>Arithmetic multiplication.</entry> - <entry>6</entry> - </row> - <row> - <entry>Division</entry> - <entry> - <replaceable>e1</replaceable> <literal>/</literal> <replaceable>e2</replaceable> - </entry> - <entry>left</entry> - <entry>Arithmetic division.</entry> - <entry>6</entry> - </row> - <row> - <entry>Addition</entry> - <entry> - <replaceable>e1</replaceable> <literal>+</literal> <replaceable>e2</replaceable> - </entry> - <entry>left</entry> - <entry>Arithmetic addition.</entry> - <entry>7</entry> - </row> - <row> - <entry>Subtraction</entry> - <entry> - <replaceable>e1</replaceable> <literal>-</literal> <replaceable>e2</replaceable> - </entry> - <entry>left</entry> - <entry>Arithmetic subtraction.</entry> - <entry>7</entry> - </row> - <row> - <entry>String Concatenation</entry> - <entry> - <replaceable>string1</replaceable> <literal>+</literal> <replaceable>string2</replaceable> - </entry> - <entry>left</entry> - <entry>String concatenation.</entry> - <entry>7</entry> - </row> - <row> - <entry>Not</entry> - <entry><literal>!</literal> <replaceable>e</replaceable></entry> - <entry>none</entry> - <entry>Boolean negation.</entry> - <entry>8</entry> - </row> - <row> - <entry>Update</entry> - <entry><replaceable>e1</replaceable> <literal>//</literal> - <replaceable>e2</replaceable></entry> - <entry>right</entry> - <entry>Return a set consisting of the attributes in - <replaceable>e1</replaceable> and - <replaceable>e2</replaceable> (with the latter taking - precedence over the former in case of equally named - attributes).</entry> - <entry>9</entry> - </row> - <row> - <entry>Less Than</entry> - <entry> - <replaceable>e1</replaceable> <literal><</literal> <replaceable>e2</replaceable>, - </entry> - <entry>none</entry> - <entry>Arithmetic comparison.</entry> - <entry>10</entry> - </row> - <row> - <entry>Less Than or Equal To</entry> - <entry> - <replaceable>e1</replaceable> <literal><=</literal> <replaceable>e2</replaceable> - </entry> - <entry>none</entry> - <entry>Arithmetic comparison.</entry> - <entry>10</entry> - </row> - <row> - <entry>Greater Than</entry> - <entry> - <replaceable>e1</replaceable> <literal>></literal> <replaceable>e2</replaceable> - </entry> - <entry>none</entry> - <entry>Arithmetic comparison.</entry> - <entry>10</entry> - </row> - <row> - <entry>Greater Than or Equal To</entry> - <entry> - <replaceable>e1</replaceable> <literal>>=</literal> <replaceable>e2</replaceable> - </entry> - <entry>none</entry> - <entry>Arithmetic comparison.</entry> - <entry>10</entry> - </row> - <row> - <entry>Equality</entry> - <entry> - <replaceable>e1</replaceable> <literal>==</literal> <replaceable>e2</replaceable> - </entry> - <entry>none</entry> - <entry>Equality.</entry> - <entry>11</entry> - </row> - <row> - <entry>Inequality</entry> - <entry> - <replaceable>e1</replaceable> <literal>!=</literal> <replaceable>e2</replaceable> - </entry> - <entry>none</entry> - <entry>Inequality.</entry> - <entry>11</entry> - </row> - <row> - <entry>Logical AND</entry> - <entry><replaceable>e1</replaceable> <literal>&&</literal> - <replaceable>e2</replaceable></entry> - <entry>left</entry> - <entry>Logical AND.</entry> - <entry>12</entry> - </row> - <row> - <entry>Logical OR</entry> - <entry><replaceable>e1</replaceable> <literal>||</literal> - <replaceable>e2</replaceable></entry> - <entry>left</entry> - <entry>Logical OR.</entry> - <entry>13</entry> - </row> - <row> - <entry>Logical Implication</entry> - <entry><replaceable>e1</replaceable> <literal>-></literal> - <replaceable>e2</replaceable></entry> - <entry>none</entry> - <entry>Logical implication (equivalent to - <literal>!<replaceable>e1</replaceable> || - <replaceable>e2</replaceable></literal>).</entry> - <entry>14</entry> - </row> - </tbody> - </tgroup> -</table> - -</section> |