USPExpress Pro
Version 2.3

[   Legend:                  ]
[ + New feature              ]
[ * Improvement/modification ]
[ - Defect correction        ]

---- History -------------------------------------------------------------------

2.3 [June 30, 2009]
[+] New SeparatorType, ListSeparator, NumberDecimalSeparator properties
[+] Common math rounding introduced as an option. E.g.: Round(2.5, 0, MathRounding) yields 3.0. (By default, bankers' rounding is still used.) 
[+] An option to add user-defined operators
[+] "Inf" constant. Stands for "positive infinity".
[+] A sample has been added to show the usage of custom "+" and "-" operators in conjunction with dates, Excel-like. Example: #12/05/2008# - (365*10/2)
[-] Function context passed inside IIF calls

2.2 [February 26, 2009]
[+] XOR operator support
[+] French localization of all end-user messages is available
[+] ExpressionTree object is now serializable as a binary stream.

2.1.3 [April 25, 2008]
[+] "ToNumber(string)" function has been added. It converts a string to a number.
[*] Improved support of "long" data type, when used in decimal mode.  
[-] "+" operator, if used with strings or with a string and a number, acts as the string concatenation operator.

2.1.2 [September 19, 2007] 
[*] Changed "InvalidArgument" parameter type in Function and Operator validation routines from "ref" to "out". 

2.1.1 [August 13, 2007] 
[*] Introduced decimal support for DateAdd, DATE, MID, LEFT, FIND functions.
[-] Adjusted documentation for DateAdd function - any fractional part of the second parameter is ignored.

2.1 [July 24, 2007] 
[+] Short-circuiting of logical operators and functions. "IsShortCircuitSupported" method.

2.0 [July 12, 2007] 
[+] IIF conditional evaluation
[+] indexed variables support ("[]" syntax)
[+] "Context" support
[+] Decimal support (Parser.StorageType property)
[+] The names of the variables may contain any character (e.g. spaces), as soon as they are enclosed in {} brackets.
[+] bCollectUnknownVariables parameter added to Parse method
[+] The following read-only properties have been added to Function and Constant classes:
	- string Syntax{get;}
	- string Description{get;}
	- GroupType Group{get;}
[+] New enumeration type, USP.Express.Pro.Constants.GroupType has been added.
[+] ">" and "<" comparison operators are supported for strings
[*] The leading zero can now be omitted in numbers. E.g., .01 is now a valid syntax for 0.01.
[*] Improved reporting on unbalanced parentheses (the position of the first unbalanced parenthesis is reported)
[*] Enhanced error reporting on parsing (InvalidToken property is included in ParseException class)
[-] Min/Max functions returned Double.Max value when NaN was passed as one of its arguments.

1.1.5 [July 4, 2006]
[+] .NET 2.0 release
[*] An option to overload existing operators
[*] Modified the BuildXMLTree method:
Introduced a "TYPE" attribute to hold information on the data type of the token in the expression tree.
Example:
<EXPRESSION>
  <NODE TYPE="Operator" VALUE="+">
    <NODE TYPE="Function" VALUE="SQRT">
      <NODE TYPE="Operator" VALUE="+">
        <NODE TYPE="Variable" VALUE="X1"/>
        <NODE TYPE="Variable" VALUE="X2"/>
      </NODE>
    </NODE>
    <NODE TYPE="Variable" VALUE="X3"/>
  </NODE>
</EXPRESSION>
[*] Two-dimensional arrays as function parameters are now supported.
Function.UnfoldArray method has been introduced.
[-] IIF function - parsing bug fixed
[+] "Root" function has been introduced

--------------------------------------------------------------------------------
Copyright (C) 1999-2009 Unisoft plus LLC