From 9812f88a9a612144bea02c7acf499867eb0cbeb9 Mon Sep 17 00:00:00 2001
From: lemon <lsof@mailbox.org>
Date: Mon, 13 Oct 2025 19:06:52 +0200
Subject: implement most of preprocessor   - concatenation (##)   - builtin
 macros (__FILE__ etc)   - fails in some edge cases, and code needs cleanup  
 - add embedded system include files (stddef.h, stdarg.h for now)   - can
 handle stdio.h now

---
 test/hello.c |  2 +-
 test/pp.c    | 14 +++++++++++++-
 test/pp.h    |  2 +-
 3 files changed, 15 insertions(+), 3 deletions(-)

(limited to 'test')

diff --git a/test/hello.c b/test/hello.c
index 9d21323..e27be8d 100644
--- a/test/hello.c
+++ b/test/hello.c
@@ -1,4 +1,4 @@
-int printf(char *, ...);
+#include <stdio.h>
 int main(int argc, char **argv) {
    printf("hello world\n");
 }
diff --git a/test/pp.c b/test/pp.c
index 1c1549f..0aa5287 100644
--- a/test/pp.c
+++ b/test/pp.c
@@ -1,12 +1,24 @@
 
 #include "pp.h"
 #include "pp.h"
+#include <stddef.h>
+#include <stdio.h>
+//
+#define CATl(a) a##bar
+#define CATr(a) foo##a
+#define CAT(a,b) a##b
+
 
 int
 main(void)
 {
+   int CATl(foo);
+   ++foobar;
+   --CATr(bar);
+   CAT(foo,bar) += 3;
    printf("%s %s\n",STR ( ok /1   "\n"n ;.& 
             05.5), STR(ADD(1,2)));
    hi(ADD(Foo, SQR(Bar+1)));
-   printf("%s %s\n", str(Foo), xstr(Foo));
+   int foo123 = 77;
+   printf("%s %s %g\n", str(Foo,5), xstr(Foo), CAT(1.5,e3f) + CAT(7,)-CAT(1,));
 }
diff --git a/test/pp.h b/test/pp.h
index 029c6ee..63de6f5 100644
--- a/test/pp.h
+++ b/test/pp.h
@@ -17,7 +17,7 @@ void hi(int x) {
 #define STR(h) #h 
 
 #define xstr(s1) str(s1)
-#define str(s) #s
+#define str(...) #__VA_ARGS__
 
 #endif
 
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