Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.scl.expressions / src / org / simantics / scl / expressions / ContextualValue.java

diff --git a/bundles/org.simantics.scl.expressions/src/org/simantics/scl/expressions/ContextualValue.java b/bundles/org.simantics.scl.expressions/src/org/simantics/scl/expressions/ContextualValue.java
new file mode 100644 (file)
index 0000000..b339b45
--- /dev/null
+++ b/bundles/org.simantics.scl.expressions/src/org/simantics/scl/expressions/ContextualValue.java
@@ -0,0 +1,25 @@
+package org.simantics.scl.expressions;\r
+\r
+import org.simantics.scl.compiler.types.Type;\r
+\r
+/**\r
+ * A value that depends on some context. For example SCL expression\r
+ * can be compiled into contextual value where the actual value\r
+ * depends on the free variables of the expression.\r
+ * @author Hannu Niemistö\r
+ * @param <Context>\r
+ */\r
+public interface ContextualValue<Context> {\r
+    /**\r
+     * SCL type of the value.\r
+     * @return\r
+     */\r
+    Type getType();\r
+    \r
+    /**\r
+     * Evaluates the value in the given context.\r
+     * @param context\r
+     * @return\r
+     */\r
+    Object getValue(Context context);\r
+}\r