From dda8ef14aca2b99d620323b3173e967456c92314 Mon Sep 17 00:00:00 2001
From: jaortega <jaortega>
Date: Sat, 2 Dec 2000 22:32:48 +0000
Subject: added mix_eval_t, a w-expression evaluator

---
 mixlib/xmix_eval.h | 55 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 mixlib/xmix_eval.h

(limited to 'mixlib/xmix_eval.h')

diff --git a/mixlib/xmix_eval.h b/mixlib/xmix_eval.h
new file mode 100644
index 0000000..5382d73
--- /dev/null
+++ b/mixlib/xmix_eval.h
@@ -0,0 +1,55 @@
+/* -*-c-*- ---------------- xmix_eval.h :
+ * Definition of opaque types in mix_eval.h
+ * ------------------------------------------------------------------
+ *  Last change: Time-stamp: <00/12/02 03:53:09 jose>
+ * ------------------------------------------------------------------
+ * Copyright (C) 2000 jose antonio ortega ruiz <jaortega@acm.org>
+ *  
+ * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *  
+ */
+
+
+#ifndef XMIX_EVAL_H
+#define XMIX_EVAL_H
+
+#include "mix_eval.h"
+
+/* the evaluator type */
+struct mix_eval_t 
+{
+  mix_symbol_table_t *table;	/* symbol table */
+  gboolean towner;		/* true if owns the table */
+  mix_eval_result_t result;	/* last evaluation result */
+  gint errpos;			/* location of last error */
+  mix_word_t value;		/* last computed value */
+};
+
+/* flex scanner data/result struct */
+typedef struct mix_eval_data_ 
+{
+  gchar *expr;
+  const mix_symbol_table_t *table;
+  mix_word_t value;
+  mix_short_t loc;
+  gint errpos;
+} mix_eval_data_;
+
+/* flex scanner prototype */
+extern
+mix_eval_result_t mix_eval_expr (mix_eval_data_ *data);
+
+#endif /* XMIX_EVAL_H */
+
-- 
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