1 files changed, 10 insertions, 13 deletions
diff --git a/src/symap.h b/src/symap.h
index ed74157..74dc59a 100644
--- a/src/symap.h
+++ b/src/symap.h
@@ -12,11 +12,14 @@
 #ifndef SYMAP_H
 #define SYMAP_H
 
+#include "zix/attributes.h"
+
 #include <stdint.h>
 
 typedef struct SymapImpl Symap;
 
 /// Create a new symbol map
+ZIX_MALLOC_FUNC
 Symap*
 symap_new(void);
 
@@ -24,24 +27,18 @@ symap_new(void);
 void
 symap_free(Symap* map);
 
-/// Map a string to a symbol ID if it is already mapped, otherwise return 0
+/// Map a string to a symbol if it is already mapped, otherwise return 0
+ZIX_PURE_FUNC
 uint32_t
-symap_try_map(Symap* map, const char* sym);
-
-/**
-   Map a string to a symbol ID.
+symap_try_map(const Symap* map, const char* sym);
 
-   Note that 0 is never a valid symbol ID.
-*/
+/// Map a string to a symbol
 uint32_t
 symap_map(Symap* map, const char* sym);
 
-/**
-   Unmap a symbol ID back to a symbol, or NULL if no such ID exists.
-
-   Note that 0 is never a valid symbol ID.
-*/
+/// Unmap a symbol back to a string if possible, otherwise return NULL
+ZIX_PURE_FUNC
 const char*
-symap_unmap(Symap* map, uint32_t id);
+symap_unmap(const Symap* map, uint32_t id);
 
 #endif // SYMAP_H