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-rw-r--r--src/globals.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/globals.h b/src/globals.h
index c69306a6d..45561dee3 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -404,9 +404,16 @@ EXTERN int garbage_collect_at_exit INIT(= FALSE);
// Commonly used types.
+// "unknown" is used for when the type is really unknown, e.g. global
+// variables. Also for when a function may or may not return something.
EXTERN type_T t_unknown INIT6(VAR_UNKNOWN, 0, 0, TTFLAG_STATIC, NULL, NULL);
+
+// "any" is used for when the type is mixed. Excludes "void".
EXTERN type_T t_any INIT6(VAR_ANY, 0, 0, TTFLAG_STATIC, NULL, NULL);
+
+// "void" is used for a function not returning anything.
EXTERN type_T t_void INIT6(VAR_VOID, 0, 0, TTFLAG_STATIC, NULL, NULL);
+
EXTERN type_T t_bool INIT6(VAR_BOOL, 0, 0, TTFLAG_STATIC, NULL, NULL);
EXTERN type_T t_special INIT6(VAR_SPECIAL, 0, 0, TTFLAG_STATIC, NULL, NULL);
EXTERN type_T t_number INIT6(VAR_NUMBER, 0, 0, TTFLAG_STATIC, NULL, NULL);