2013/7/18 Mark Thomas wrote: > > On 18/07/2013 08:00, Violeta Georgieva wrote: > > Hi, > > > > Let's have a lambda expression: > > > > x->y->x-y > > > > Let's now assign it and invoke it indirectly: > > > > f = x->y->x-y; f(2)(1) > > Several problems here. > > 1. The grammar didn't support functions having multiple sets of parameters. > > 2. The lambda expression handling in AstFunction only handled single > parameters sets. > > 3. The incMethodParameterIndex() can't be used in this case so an > alternative solution is required to the problem that addressed. > > All of these have been fixed in trunk. There is some more clean-up that > can now be done. > > I look forward to your next brain teaser :) >
;) If I modify the example above like this f = ()->y->2-y; f()(1) Then I'm receiving an exception: javax.el.ELException: Only [0] arguments were provided for a lambda expression that requires at least [1] at javax.el.LambdaExpression.invoke(LambdaExpression.java:60) at javax.el.LambdaExpression.invoke(LambdaExpression.java:92) at org.apache.el.parser.AstFunction.getValue(AstFunction.java:103) at org.apache.el.parser.AstSemicolon.getValue(AstSemicolon.java:37) at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:188) at javax.el.ELProcessor.getValue(ELProcessor.java:45)
