I have added
extern "C" cstatement
extern "C" { cstatement+ }
to the grammar. This allows you to write any C89 code directly in Felix
with the following caveats:
0) There is no pre-processor!
1) At present typedef names aren't handled. This requires tracking in the
parser and a special production. TBD.
2) At present the code doesn't do anything. It's just parsed.
3) Bad C that happens to conform to this particular grammar will be accepted.
4) Due to laziness, C code currently uses *Felix* literals and identifiers,
not C ones.
The intention is to allow you to write C instead of Felix to specify bindings
and also you can write some C functions this way instead of using
"body". This will require quite a bit more work actually decoding the
code.
There is little hope of extending this mechanism to real C++. The problem is
that name lookup in C is simple: type names are just stored in a list.
In C++ you have a lot of namespace crud, which means a real lookup
is required to discover if a name is a type name. However we might be
able to support a subset of C++. Anyhow this parses:
extern "C" void f(int);
extern "C" void g( int *a);
extern "C" void f(struct X a') { return """xxx"""; }
extern "C" {
void f(int);
static int x;
static int y = 1;
void f(int);
}
println "Done C";
--
john skaller
skal...@users.sourceforge.net
------------------------------------------------------------------------------
What You Don't Know About Data Connectivity CAN Hurt You
This paper provides an overview of data connectivity, details
its effect on application quality, and explores various alternative
solutions. http://p.sf.net/sfu/progress-d2d
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