> Does SPAD support optional arguments to functions?
Aldor does, but to my knowledge SPAD does not. But you can overload
function names, see below.
Does that help?
Ralf
-- foo.spad
)abbrev package FOO Foo
Foo(T: Ring): with
foo: T -> T
foo: (T, T) -> T
== add
foo(x: T, y: T): T == 10*x+y
foo(x: T): T == foo(x, 1)
------------------------
(1) -> )co foo.spad
(1) -> foo(3)$Foo(Integer)
(1) 31
Type: Integer
(2) -> foo(1,7)$Foo(Integer)
(2) 17
Type: Integer
(3) -> foo(4.0)$Foo(Float)
(3) 41.0
Type: Float
(4) -> foo(1.0, 1.9)$Foo(Float)
(4) 11.9
Type: Float
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