Add sources for unification type errors.

2020-09-09 15:26:04 -07:00
parent 80f181cbb6
commit 1f7a53ccf6
3 changed files with 25 additions and 15 deletions
--- a/13/type.hpp
+++ b/13/type.hpp
@@ -4,6 +4,8 @@
 #include <string>
 #include <vector>
 #include <set>
+#include <optional>
+#include "location.hh"

 struct type_mgr;

@@ -88,7 +90,7 @@ struct type_mgr {
    type_ptr new_type();
    type_ptr new_arrow_type();

-    void unify(type_ptr l, type_ptr r);
+    void unify(type_ptr l, type_ptr r, const std::optional<yy::location>& loc = std::nullopt);
    type_ptr substitute(
            const std::map<std::string, type_ptr>& subst,
            const type_ptr& t) const;