private Ast.Predicate predicate()
{
trace("FIQLParser.Parser.predicate()");
if (accept(Symbol.ident))
{
var predicate = new Ast.Predicate();
predicate.ident = new Ast.Identifier(lastToken());
if (accept(Symbol.lessthan) ||
accept(Symbol.lessequal) ||
accept(Symbol.greaterthan) ||
accept(Symbol.greaterequal)
)
{
predicate.op = new Ast.Operator(lastToken());
predicate.rvalue = value();
}
else if (accept(Symbol.equal) || accept(Symbol.notequal))
{
predicate.op = new Ast.Operator(lastToken());
predicate.rvalue = equatable();
}
else
{
throw error("predicate: " + expectedMessage());
}
return(predicate);
}
throw error("predicate: must start with identifier");
}
public String Visit(Ast.Predicate predicate)
{
try {
wildFlag = (predicate.rvalue.Token.symbol == Symbol.wildstring);
return(predicate.ident.Accept(this)
+ predicate.op.Accept(this)
+ predicate.rvalue.Accept(this));
} finally {
wildFlag = false;
}
}