著名的 ader template

<!--- Lexer: <ad: - start tag ID EQUAL (=) QUOTE (") EXPRESSION (#) - expression /> - end of tag with close > - end of tag # - expression ID LPAREN RPAREN QUOTE COMMA </ad: - end tag ID > - end of tag Parser: Program ::= (Text | Expression | Tag | EndTag)* Expression ::= EXPRESSION InnerExpression EXPRESSION InnerExpression ::= ID ExpressionSuffix ExpressionSuffix ::= (DOT ID)* | ID LPAREN Arguments? RPAREN Arguments ::= InnerExpression (COMMA InnerExpression)* Tag ::= STARTTAG ID TagAttribute* ENDOFTAG TagAttribute ::= ID EQUALS (String | Expression) ---> <!--- built-in functions: equals notequals iseven isodd isempty isnotempty isnumber toupper tolower isdefined ifdefined len tolist(collection, propertyname, delim) tolist(collection, delim) isnull not iif special/built-in tags: if/else template foreach apply ---> <!--- this is a comment ---> <ad:template name="bold"> <ad:argument name="value"><b>#arguments.innerText#</b></ad:template> <ad:template name="italic"> <ad:argument name="value"><i>#value#</i></ad:argument> </ad:template> #field.value# <ad:foreach var="x" collection="#values#" index="i"> #i#. <ad:apply template="bold">#x.hello#</ad:apply> <ad:apply template="italic" value="Yes?" /> </ad:foreach> <ad:if test="#value#"> <ad:elseif test="#isvalid(x)#"> <ad:else> </ad:if> <ad:foreach var="x" collection="#values#"> </ad:foreach> #item.name ? notEmpty(item.name)# <!--- show item name, if item.name is not empty string ---> <ad:template name="link" arguments="url,title"> <a href="#arguments.url#" #ifDefined("target")#>#arguments.title#</a> </ad:template> <ad:link url="http://www.1000ad.net?page=#page#" title="1000AD" /> <ad:template name="bold">#template.innerText#</ad:template> <ad:bold><ad:italic>Something</ad:italic></ad:bold> <ad:template name="listItem"><li>#template.innerText#</ad:template> <ul> <ad:foreach var="u" collection="#users#"> <ad:listitem><a href="userDetail?uid=#u.id#">#u.lastname#, #u.firstname#</a></ad:listitem> </ad:foreach> </ul> <ad:for from="1" to="10" index="i"> #x# </ad:for>