[Assorted-commits] SF.net SVN: assorted: [440] sandbox/trunk/src/c/consts.c

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

Revision: 440
          http://assorted.svn.sourceforge.net/assorted/?rev=440&view=rev
Author:   yangzhang
Date:     2008-02-14 18:45:03 -0800 (Thu, 14 Feb 2008)

Log Message:
-----------
added const test

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

Added: sandbox/trunk/src/c/consts.c
===================================================================
--- sandbox/trunk/src/c/consts.c	                        (rev 0)
+++ sandbox/trunk/src/c/consts.c	2008-02-15 02:45:03 UTC (rev 440)
@@ -0,0 +1,66 @@
+// Exploring const-ness in C. It's actually the same in C++ (modulo C++-only
+// concepts like classes). Obvious results.
+
+struct S
+{
+  int x;
+  char *s;
+  const char *c;
+};
+
+int
+main()
+{
+  {
+    const char* s = "hello world";
+
+    // Compile error on this.
+    // s[0] = 'H';
+  }
+  {
+    const struct S *p = 0;
+
+    // Compile error on this.
+    // p->x = 0;
+
+    // No compile error on this.
+    p->s[0] = '\0';
+
+    // Compile error on this.
+    // p->c[0] = '\0';
+
+    // No compile error on this.
+    p = 0;
+  }
+  {
+    struct S * const p = 0;
+
+    // No compile error on this.
+    p->x = 0;
+
+    // No compile error on this.
+    p->s[0] = '\0';
+
+    // Compile error on this.
+    // p->c[0] = '\0';
+
+    // Compile error on this.
+    // p = 0;
+  }
+  {
+    const struct S * const p = 0;
+
+    // Compile error on this.
+    // p->x = 0;
+
+    // No compile error on this.
+    p->s[0] = '\0';
+
+    // Compile error on this.
+    // p->c[0] = '\0';
+
+    // Compile error on this.
+    // p = 0;
+  }
+  return 0;
+}


This was sent by the SourceForge.net collaborative development platform, the world's largest Open Source development site.