A function reference is of the form "#someFunction(a,b,c)". Functions may be defined
in the context prior to the expression being evaluated. Functions may also be static
Java methods, registered in the context prior to invocation of the expression.
Functions are very simplistic. The arguments are not part of the definition
(right now), so the names must be unique.
Andy Clement, Juergen Hoeller
Fields inherited from class org.springframework.expression.spel.ast.SpelNodeImpl
Check whether a node can be compiled to bytecode. The reasoning in each node may
be different but will typically involve checking whether the exit type descriptor
of the node is known and any relevant child nodes are compilable.
Generate the bytecode for this node into the supplied visitor. Context info about
the current expression being compiled is available in the codeflow object. For
example it will include information about the type of the object currently
on the stack.