X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Flanguage%2Fexpressions%2Fprivate.h;h=48cece73f658328c2de7f3b7532c3844564b20c6;hb=48386ee68a5283653435d05a9ea4e449710fd370;hp=6173b4f481029de9e36006c470eca47bcb88a035;hpb=0a20082e28caaaf1122510d992e1c6dce755ad0e;p=pspp-builds.git

diff --git a/src/language/expressions/private.h b/src/language/expressions/private.h
index 6173b4f4..48cece73 100644
--- a/src/language/expressions/private.h
+++ b/src/language/expressions/private.h
@@ -100,7 +100,7 @@ struct string_node
 struct variable_node
   {
     operation_type type;   /* OP_variable. */
-    struct variable *v;
+    const struct variable *v;
   };
 
 struct integer_node
@@ -148,7 +148,7 @@ union operation_data
     operation_type operation;
     double number;
     struct substring string;
-    struct variable *variable;
+    const struct variable *variable;
     const struct vector *vector;
     struct fmt_spec *format;
     int integer;
@@ -194,7 +194,7 @@ union any_node *expr_allocate_string_buffer (struct expression *e,
 union any_node *expr_allocate_string (struct expression *e,
                                       struct substring);
 union any_node *expr_allocate_variable (struct expression *e,
-                                        struct variable *);
+                                        const struct variable *);
 union any_node *expr_allocate_format (struct expression *e,
                                  const struct fmt_spec *);
 union any_node *expr_allocate_vector (struct expression *e,