X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Flanguage%2Fcontrol%2Fcontrol-stack.c;h=cac206dd1e7fafc7337293929e020185855bbf22;hb=8eac4df36306cd357bba29ffbfaddc537fc0be47;hp=193b52b0837c3457dc5057571e6d548229ea1fd5;hpb=e40c90b1b6dbd03ce58046ada7f4ddb5a6b4b354;p=pspp-builds.git

diff --git a/src/language/control/control-stack.c b/src/language/control/control-stack.c
index 193b52b0..cac206dd 100644
--- a/src/language/control/control-stack.c
+++ b/src/language/control/control-stack.c
@@ -11,7 +11,7 @@
 
 struct ctl_struct
   {
-    struct ctl_class *class;    /* Class of control structure. */
+    const struct ctl_class *class;    /* Class of control structure. */
     struct ctl_struct *down;	/* Points toward the bottom of ctl_stack. */
     void *private;              /* Private data. */
   };
@@ -31,7 +31,7 @@ ctl_stack_clear (void)
 }
 
 void
-ctl_stack_push (struct ctl_class *class, void *private) 
+ctl_stack_push (const struct ctl_class *class, void *private) 
 {
   struct ctl_struct *ctl;
 
@@ -44,7 +44,7 @@ ctl_stack_push (struct ctl_class *class, void *private)
 }
 
 void *
-ctl_stack_top (struct ctl_class *class) 
+ctl_stack_top (const struct ctl_class *class) 
 {
   struct ctl_struct *top = ctl_stack;
   if (top != NULL && top->class == class)
@@ -61,7 +61,7 @@ ctl_stack_top (struct ctl_class *class)
 }
 
 void *
-ctl_stack_search (struct ctl_class *class) 
+ctl_stack_search (const struct ctl_class *class) 
 {
   struct ctl_struct *ctl;