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Make .lh headers optional and generate ".olh" files from the exported
stuff in the .lc file. The .olh files should be possible to read by both
a C compiler and a LRL compiler.
The Makefile can have a rule for generating .olh files from .lc files, e.g.
.lc.olh:
lrlc -h $< -o $@
.SUFFIXES: .lc .olh
1. Can we use #defines to replace LRL specific stuff with whitespace if
the C compiler reads the file? some stuff are tricky, such as array
parameters and optional types.
- advantage: this would allow the C interop to be used for this.
- advantage: if C or a language based on C is adds the features found
in LRL (such as pointer ownership), then it can define _LRLinterop
to some version, and all the _LRLxxx values, and then include the
file directly.
2. Or should we generate both C and LRL code, and select between them by an
#ifdef?
3. Use something like 1, but try to use as much C standard stuff as possible.
Have a header that defines a "profile" with defaults. This format could be
used by other programming languages too.
- advantage: this would allow the C interop to be used for this.
- advantage: C programmers could also add LRL stuff to their headers
if they want to have minimal support for LRL (like they often do
with C++).
Example of 1:
/*#LRLHDR# Generated file. Do not modify. */
#if !defined(_LRLinterop) || _LRLinterop < 1L
#define _LRLinterop 1L
#define _LRLptr *
#define _LRLbyte uint8
#define _LRLown
#define _LRLrefown(r)
#endif
_LRLbyte _LRLptr find_space(_LRLbyte _LRLptr s);
Example of 2:
/*#LRLHDR# Generated file. Do not modify. */
#ifdef _LRL
byte^ find_space(byte^ s);
#else
unsigned char *find_space(unsigned char *s);
#endif
Example of 3:
/*#INTEROPHDR# Generated file. Do not modify. */
#ifdef _INTEROPHDR
#define _IHptrdefault nonown const
#define _IHargdefault const
#define _IHfuncdefault nonpure
#define _IHtype_charptr utf8zstring
#define _IHtype_ucharptr binary
#endif
#define _IHownptr *
char *find_space(char *s);
char _IHownptr get_error_string(int errorcode);
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