Named parameters: Difference between revisions

=={{header|Forth}}==

As with many of the other languages here, Forth does not have named parameters, but it does have practices that arise in situations where a Forth programmer might want named parameters. In Forth's case, these practices also arise when a more natural control language is wanted (e.g., LEFT ARM 36 DEGREES LIFT) or when a word would otherwise take excessively many arguments.

Two regrettably unnatural examples:

{{works with|Gforth}}

<lang forth>256 buffer: first-name

256 buffer: last-name

: is ( a "name" -- ) parse-name rot place ;

: greet ( -- )

cr ." Hello, " first-name count type space last-name count type ." !" ;

first-name is Bob last-name is Hall greet

require mini-oof2.fs

require string.fs

object class

field: given-name

field: surname

end-class Person

: hiya ( -- )

cr ." Hiya, " given-name $. space surname $. ." !" ;

Person new >o s" Bob" given-name $! s" Hall" surname $! hiya o></lang>

{{out}}<pre>Hello, Bob Hall!

Hiya, Bob Hall!</pre>