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6.2.3. =..
converts a list into a struct and vice versa
SYNOPSIS
OPERATOR op(700,xfx,=..).
hello(Arg1,Args) =..
SYNTAX
=..(Struct, List) (x,x) Struct =.. List (x,x)
ARGUMENTS
void(Struct) (x) Struct that is described by List
void(Struct) (X) List that is related to the struct
DESCRIPTION
This is a standard prolog built-in. '=..' succeeds, if the List contains the functor of Struct followed by its arguments. It can be used in two basic ways, transforming a List into a Struct or the other way round. Note that if provide the List, its first element must match an atom, since it becomes the functor of the Struct.
EXAMPLE
write("Functor: "),read(F),
write("Arg1: "),read(A1),
write("Arg2: "),read(A2),
Struct =.. [F,A1,A2],
write("Struct = ",Struct).
ERRORS
No runtime errors. Fails if transformation can't be conducted.
LAYERS
prolog-process, client-server, object
RELATED PREDICATES
(none)
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