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authorRainer Gerhards <rgerhards@adiscon.com>2008-02-19 17:38:37 +0000
committerRainer Gerhards <rgerhards@adiscon.com>2008-02-19 17:38:37 +0000
commit7a146af86f153a14b525333df795b78e01b63b4a (patch)
treea1b14db282b9f598c14f4325613094f983df07af /doc
parentb5a09481faa2eda03b568839ed724970bc8a1adc (diff)
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- begun implementation of expression parsing logic
- implemented, simpstr, var, number in tokenizer
Diffstat (limited to 'doc')
-rw-r--r--doc/expression.html2
1 files changed, 1 insertions, 1 deletions
diff --git a/doc/expression.html b/doc/expression.html
index 5fda4915..7ce9429a 100644
--- a/doc/expression.html
+++ b/doc/expression.html
@@ -11,7 +11,7 @@ far, they are supported for filtering messages.</p>
<h2>Formal Definition</h2>
<p>Below is the formal definition of expression format (in ABNF, RFC 2234):<br>
-</p><pre>expr := e_and *("or" e_and)<br>e_and := e_cmp *("and" e_cmp)<br>e_cmp := val cmp_op val<br>val := ["+" / "-"] term *(("+" / "-") term)<br>term := factor *(("*" / "/" / "%") factor)<br>factor := ["not"] terminal<br>terminal := var / constant / function / "(" expr ")"<br>function := name "(" *("," expr) ")"<br>var := "$" varname<br>varname := msgvar / sysvar<br>msgvar := name<br>sysvar := "$" name<br>name := alpha *(alnum)<br>constant := string / number<br>string := simpstr / tplstr ; tplstr will be implemented in next phase<br>simpstr := "'" *char "'" ; use your imagination for char ;)<br>tplstr := '"' template '"' ; not initially implemented<br>number := 1*digit<br>cmp_op := "==" / "!=" / "&lt;&gt;" / "&lt;" / "&gt;" / "&lt;=" / "&gt;=" <br>digit := %x30-39<br>alpha := "a" ... "z" # all letters<br>alnum :* alpha / digit / "_"<br></pre>
+</p><pre>expr := e_and *("or" e_and)<br>e_and := e_cmp *("and" e_cmp)<br>e_cmp := val cmp_op val<br>val := ["+" / "-"] term *(("+" / "-") term)<br>term := factor *(("*" / "/" / "%") factor)<br>factor := ["not"] terminal<br>terminal := var / constant / function / "(" expr ")"<br>function := name "(" *("," expr) ")"<br>var := "$" varname<br>varname := msgvar / sysvar<br>msgvar := name<br>sysvar := "$" name<br>name := alpha *(alnum)<br>constant := string / number<br>string := simpstr / tplstr ; tplstr will be implemented in next phase<br>simpstr := "'" *char "'" ; use your imagination for char ;)<br>tplstr := '"' template '"' ; not initially implemented<br>number := 1*digit ; 0nn = octal, 0xnn = hex, nn = decimal<br>cmp_op := "==" / "!=" / "&lt;&gt;" / "&lt;" / "&gt;" / "&lt;=" / "&gt;=" <br>digit := %x30-39<br>alpha := "a" ... "z" # all letters<br>alnum :* alpha / digit / "_"<br></pre>
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<p><font size="2">This documentation is part of the