syntax err..看别人的程序,第一行是:- dynamic cycle/1.报错信息是***.pl:1:12:syntax error:. or operator expected after expression这
2.9 Prolog and Document Type DeclarationXML documents may, and should, begin with an XML declaration which specifies, among other things, the version of XML being used. The function of the markup in an XML document is to describe its storage and logical structures, and associate attribute-value...
The rationale is that errors inside a syntactic predicate are expected and not actually syntactic errors in the input. Rule throw.1 is related to error reporting, while rule throw.2 is where error recovery happens. R(l) denotes the recovery expression associated with the label l. When a ...