assorted-commits

[Assorted-commits] SF.net SVN: assorted: [665] sandbox/trunk/src/c/macros.c

[<yan...@us...>]

Revision: 665
          http://assorted.svn.sourceforge.net/assorted/?rev=665&view=rev
Author:   yangzhang
Date:     2008-04-19 20:59:13 -0700 (Sat, 19 Apr 2008)

Log Message:
-----------
standard preprocessor feature

Added Paths:
-----------
    sandbox/trunk/src/c/macros.c

Added: sandbox/trunk/src/c/macros.c
===================================================================
--- sandbox/trunk/src/c/macros.c	                        (rev 0)
+++ sandbox/trunk/src/c/macros.c	2008-04-20 03:59:13 UTC (rev 665)
@@ -0,0 +1,18 @@
+// Demonstrates features of the standard C preprocessor.
+
+#include <stdio.h>
+
+#define greet(x) printf("hello, " #x "!\n")
+#define rename(x) x##_val_##x
+
+int
+main()
+{
+  greet(world);
+
+  int rename(x);
+  x_val_x = 0;
+  printf("%d\n", x_val_x);
+
+  return 0;
+}


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[Assorted-commits] SF.net SVN: assorted: [666] sandbox/trunk/src/c/macros.c

[<yan...@us...>]

Revision: 666
          http://assorted.svn.sourceforge.net/assorted/?rev=666&view=rev
Author:   yangzhang
Date:     2008-04-20 07:57:51 -0700 (Sun, 20 Apr 2008)

Log Message:
-----------
updated macro test

Modified Paths:
--------------
    sandbox/trunk/src/c/macros.c

Modified: sandbox/trunk/src/c/macros.c
===================================================================
--- sandbox/trunk/src/c/macros.c	2008-04-20 03:59:13 UTC (rev 665)
+++ sandbox/trunk/src/c/macros.c	2008-04-20 14:57:51 UTC (rev 666)
@@ -1,10 +1,16 @@
-// Demonstrates features of the standard C preprocessor.
+// Demonstrates features of the standard C preprocessor and the GCC
+// preprocessor extensions.
 
 #include <stdio.h>
 
 #define greet(x) printf("hello, " #x "!\n")
 #define rename(x) x##_val_##x
 
+// GCC extensions.
+
+// Not really a preprocessor extension.
+#define dup(x,y) typeof(x) y = x;
+
 int
 main()
 {
@@ -14,5 +20,11 @@
   x_val_x = 0;
   printf("%d\n", x_val_x);
 
+  char a = 'A';
+  dup(a,b);
+  b += 1;
+
+  printf("%c %c\n", a, b);
+
   return 0;
 }


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[Assorted-commits] SF.net SVN: assorted: [677] sandbox/trunk/src/c/macros.c

[<yan...@us...>]

Revision: 677
          http://assorted.svn.sourceforge.net/assorted/?rev=677&view=rev
Author:   yangzhang
Date:     2008-04-23 13:41:17 -0700 (Wed, 23 Apr 2008)

Log Message:
-----------
commas in macros

Modified Paths:
--------------
    sandbox/trunk/src/c/macros.c

Modified: sandbox/trunk/src/c/macros.c
===================================================================
--- sandbox/trunk/src/c/macros.c	2008-04-23 20:40:48 UTC (rev 676)
+++ sandbox/trunk/src/c/macros.c	2008-04-23 20:41:17 UTC (rev 677)
@@ -5,6 +5,7 @@
 
 #define greet(x) printf("hello, " #x "!\n")
 #define rename(x) x##_val_##x
+#define decl(x) int x;
 
 // GCC extensions.
 
@@ -20,6 +21,10 @@
   x_val_x = 0;
   printf("%d\n", x_val_x);
 
+  // decl(alpha,beta,gamma); // This won't work.
+#define comma ,
+  decl(alpha comma beta comma gamma); // This works.
+
   char a = 'A';
   dup(a,b);
   b += 1;


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