* harbour.y
+ added support for _FIELD->Expression and _FIELD->ALIAS->Expression
"REPLACE Field WITH Exp" and "REPLACE ALIAS->Field WITH Exp" are supported
"REPLACE 1->Field WITH Exp" will compile but requires some more work by Ryszard.
+ added support for Aliased Variables in Push/Pop support.
+ added "Invalid alias expression" error to _szCERRORS.
- Removed Todo # 9 support for _FIELD->Alias->Field.
* harbour.l
+ added {Integer} definition - used by _Field->Area#-> rule
+ added MEMV->& and MEMVA&-> to MACROOP defeinition.
+ added rules for _FIELD->"{Integer}"->", _FIELD->"{Number}"->" (Error condition), _FIELD->"{Integer}"->" and _FIELD->"{Identifier}"->"
* Hberror.h
+ added #define ERR_ALIASEXP 38
+ /Tests/TstAlias.prg
added new test to demonstrate support for aliased expression.
* hberrors.h
+added define WARN_ASSIGN_TYPE and WARN_ASSIGN_SUSPECTED
* compiler.h
+added struct STACK_VAL_TYPE *PSTAC_VAL_TYPE
* harbour.l
+added support for tokens AS NUMERIC, AS CHARACTER, AS LOGICAL, AS DATE, AS ARRAY, AS OBJECT
*modified iLine to initialize to 0 rather than 1
* harbour.y
+added support for extended variable declaration with strong typing
+added logic to support warnings on incompatible and suspecious variable assignments
* compiler.h
added member iUsed to struct VAR
* hberrors.h
added define of codeblock parameter not used warning
* harbour.y
removed PDECLARED_VAR struct definition
removed code to maintain FunVars list
added code to GetVarPos() to reflect use of declared variable
added logic to FixReturns() and CodeBlockEnd() to generate warnings on non used decalred vaiables
removed previous version of nonused declared variables warnings from FunDedf() and {Main}
* include/hberrors.h
added WARN_VAR_NOT_USED
* source/compiler/harbour.y
added warning message "Variable \'%s\' declared but not used in function: %s"
added linked list FunVars to record the usage of declared variables
added logic to maintain FunVars
added logic to check usage as per FunVars in GenReturn()
* include/hberrors.h
added define WARN_AMBIGUOUS_VAR 1
added declaration for new function GenWarning()
* source/compiler/harbour.y
added _szWarnings[] to include parse warning messages
added function GenWarning()
added /w compiler switch to enable warnings
added warning message for ambiguous vars
