Basic type-checking

[hcoop/domtool2.git] / src / tycheck.sig

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+(* HCoop Domtool (http://hcoop.sourceforge.net/)
+ * Copyright (c) 2006, Adam Chlipala
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+*)
+
+(* Domtool configuration language type checking *)
+
+signature TYCHECK = sig
+
+    type env = Ast.typ Ast.StringMap.map
+    val empty : env
+
+    val checkExp : env -> Ast.exp -> Ast.typ
+
+    val checkUnit : env -> Ast.exp -> Ast.typ
+    (* [checkUnit] checks that all unification variables have been resolved. *)
+
+end