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Can one apply a macro to an argument list?


Can one apply a macro to an argument list?
» list » Can one apply a macro to an argument list?
By : user3100452
Date : January 12 2021, 07:00 PM
it helps some times I'm posting this as a partial answer I found to my own question, and I'll accept it in a few days if nothing new pops up.
The following works, but only if the macro to apply is contained in a library.
code :
(import (scheme base)
        (scheme eval)
        (scheme write))

(define (apply-macro mac args . libs)
  (eval (cons mac args)
        (apply environment libs)))

(define list '(#f #t #t #t))

(display (apply-macro 'and      list  '(scheme base)))    ; => #f
(display (apply-macro 'and (cdr list) '(scheme base)))    ; => #t


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In clojure, how to apply a macro to a list?

In clojure, how to apply a macro to a list?

By : Ori Lahav
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further The problem is that a is just a symbol at compile time. So there's no way for a compile-time macro to see what it contains and do the necessary expansion. As a result, you need to expand the macro at run-time using eval.
One way to do this is just to wrap the macro in a function that calls eval, which can be done with this handy "functionize" macro:
code :
(defmacro functionize [macro]
  `(fn [& args#] (eval (cons '~macro args#))))

(let [a [true]] (apply (functionize and) a))
=> true

(defmacro apply-macro [macro args]
   `(apply (functionize ~macro) ~args))

(let [a [true false]] (apply-macro and a))
=> false
c function-like macro with argument list but without replacement list?

c function-like macro with argument list but without replacement list?

By : Michelle Fisher
Date : March 29 2020, 07:55 AM
I hope this helps you . On Solaris and Mac OSX it's replaced to triggering a DTrace probe so it expands to something else.
Provide input for constant argument count macro from variable argument count macro in Visual Studio

Provide input for constant argument count macro from variable argument count macro in Visual Studio

By : Alexandra Oshmyanska
Date : March 29 2020, 07:55 AM
wish of those help I want to define macro that will add prefixes to every argument that is not prefix. , I've found the solution.
code :
#define prefix2(pefixV, a1, a2) pefixV##a1, pefixV##a2
#define prefix3(pefixV, a1, a2, a3) prefix2(pefixV, x, y)##, ##pefixV##z

#define macroMagic(x) x

#define prefixX(count, pefixV, ...) macroMagic(prefix##count(pefixV, __VA_ARGS__))

//MacroTester from stackoverflow
#define QUOTE(str) #str
#define EXPAND_AND_QUOTE(str) QUOTE(str)
#define TESTE EXPAND_AND_QUOTE(TEST)

int main(int argc, const char* argv[])
{
    #define TEST prefixX(2, simplePrefix, X, Y)
    static_assert(false, TESTE);

    return 0;
}
Prepend argument to a list and apply another macro in C preprocessor macro

Prepend argument to a list and apply another macro in C preprocessor macro

By : Will Smith
Date : March 29 2020, 07:55 AM
I wish this help you If you want to incorporate an unmatched opening parenthesis in a replacement list, you need to add a layer of indirection:
code :
#define LPAREN (

#define PREPEND_AND_APPLY_STRANGE(x) STRANGE_MACRO LPAREN x,STRIP_PAREN

#define EXPAND(...) __VA_ARGS__

EXPAND(

MACRO1(identifier) (
    ....
)
MACRO1(identifier) (
    ....
)

)
how to apply macro on list of lines with vim

how to apply macro on list of lines with vim

By : user3793236
Date : March 29 2020, 07:55 AM
around this issue If those lines have something in common, you can use the :global and :normal commands:
code :
:g/foo/norm! @1

2G@1
5G@1
9G@1
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