The latest version of Felix now allows you to use
some C like syntax for
* parameters
* function and procedure definitions
/////////////////////////////////////////////
#import <flx.flxh>
open syntax cstuff; // to get the C grammar
fun f(int x, long *y, z:int):int = {
return x + int(*y) + z;
}
var x = 5L;
println$ f (3,&x,5);
void g(int x, long *y, z:int)
{
var a = x + int(*y) + z;
println$ a;
}
g (3,&x,5);
int h(int x) { return x + x + 1; }
println$ h 7;
////////////////////////////////////////////
Please see lib/nugram.flxh for details the supported
grammar. Because it may lead to ambiguities, the
syntax is not opened by default .. the name 'cstuff'
is sure to change .. :)
You should note:
* Only basic C types and pointers thereto are supported
* you can use the keywords struct, enum, union, or class
for any other type name (even if they're not .. the keyword
is just there for parsing)
* the generated code is still FELIX code -- this is just Felix
with C syntax
* Unlike Felix, by default C parameters are vars, that is,
they're mutable. If you want to pass an immutable val,
use the 'const' keyword:
void f(int const x) { x++; // ERROR, modify x
The const keyword must be correctly positioned AFTER the type
and before the parameter. 'const int' is not correct.
[It isn't correct in C either, but it's accepted has a hack]
* Because it is Felix code .. you can do nested functions etc
and it works.. :)
**** LONG TERM ****
If enough of this gets working, we have a 'better C'.
Should be good for C/C++ programmers.
More to do includes typedefs, structs, and variables.
--
John Skaller <skaller at users dot sf dot net>
Felix, successor to C++: http://felix.sf.net
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