On Tue, 5 Oct 2010, Schwab,Wilhelm K wrote:
Hello all,
I have been bumping into some functions with large numbers of arguments. One
in particular would be best handled in the image if at all possible. The
following might be the answer:
http://thread.gmane.org/gmane.comp.lang.smalltalk.squeak.general/98538/focus=98543
Have any of you done this with >15 (or whatever the cutoff is) arguments?
You can create your own function object and invoke it with an array.
Here's an fprintf example on windows:
fprintf := ExternalLibraryFunction
name: 'fprintf'
module: 'msvcrt.dll'
callType: ExternalFunction callTypeCDecl
returnType: ExternalType signedLong
argumentTypes: {
(ExternalType structTypeNamed: #FILE) asPointerType.
ExternalType string.
ExternalType signedLong }.
file := Stdio default fopenWith: 'test.txt' with: 'w'.
fprintf invokeWithArguments: { file. 'Your number is %d.'. 42 }.
Stdio default fcloseWith: file.
Levente
P.S.: Note that you need the FILE and Stdio classes to run this example.
Bill
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