Changes between Version 5 and Version 6 of FdoExpressionType

Timestamp:

10/18/07 08:09:26 (17 years ago)

Author:

gregboone

Comment:

--

FdoExpressionType

@@ -103 +103 @@
 }}}
 
+=== Issues ===
 
+Should the following functions be added?
+
+
+{{{
+FdoBoolean FdoExpression::IsValue() 
+FdoBoolean FdoExpression::IsIdentifier() 
+FdoBoolean FdoExpression::IsFunction()
+}}}
+ 
+
+For example, the following code could make use of this function:
+
+
+{{{
+    FdoPtr<FdoExpression> exp = ...;
+
+    if (!exp->IsValue())
+        return;
+
+    FdoDataValue *dVal = static_cast<FdoDataValue *>(exp.p);
+}}}
+
+However, the above can currently be done by:
+
+{{{
+    FdoPtr<FdoExpression> exp = ...;
+
+    FdoExpressionImpType exType = exp->GetExpressionType()
+
+    if (exType != FdoBinaryExpressionType &&
+        exType != FdoUnaryExpressionType &&
+        exType != FdoComputedIdentifierType &&
+        exType != FdoIdentifierType &&
+        exType != FdoParameterType &&
+        exType != FdoFunctionType &&
+        exType != FdoGeometryValueType)
+            return;
+
+    FdoDataValue *dVal = static_cast<FdoDataValue *>(exp.p);
+}}}
+