HISTORY

***version 4.5.0***
* add 'let' keyword and unsassignable named bindings

***version 4.4.0***
* base lib: container methods check object immutability
* more meaningful error for wrong enum field
* put 'stream' class into target table instead of root
  Also expose expicit sqstd_init_streamclass() to allow placing
  stream class into specific table
* register base lib as compile-time bindings
* remove setroottable()/setconsttable() script functions
* base lib: add println() and errorln() functions

***version 4.3.0 stable***
* baselib: move some global constants to getbuildinfo() method
* always use modules in commandline interpreter
* use compile-time bindings for reference modules implementation
* check thread-safety during code execution
* str.indexof and str.contains now throws error on empty substring.
* (bugfix) don't add object to ref table in GetRefCount()
* (experimental) new operator ':=' for assignment inside if, for, while, switch

***version 4.2.0 stable***
* make commas in destructuring assignment optional
* change constant tables handling by compiler
  Earlier only enums could be found in compile-time constants. But now we have immutable objects

***version 4.1.0 stable***
-introduced immutable objects
-switched to semantic versioning
-changed SQUIRREL_VERSION_NUMBER to SQUIRREL_VERSION_NUMBER_MAJOR, SQUIRREL_VERSION_NUMBER_MINOR
  and SQUIRREL_VERSION_PATCH and removed sq_getversion() because of ambiguity of encoding
  semantic version into single integer number

***version 4.0.0 stable***
-renamed to Quirrel
-bumped version
-lots of changes - see diff_from_original_squirrel

***version 3.2 stable***
-added sq_tailcall
-added rawcall keyword
-added post call initializer syntax
-added table.keys() and table.values()
-added table.filter()
-additional parameters in array.map() and array.apply()
-additional optional initializer in array.reduce()
-closure.call() is now a "native tailcall" and the invoked function can now be suspended
-fixed sq_newmember and sq_rawnewmember properly pop parameters
-fixed capturing free variable on for loop counter before a break statement
-fixed \u in lexer
-various bugfixes

***version 3.1.1 stable***
-sq_gettypetag doesn't set last error(it's treated as SQBool function but keeps a SQRESULT for backward compatibility)
-fixed _set method in userdata delegates
-fixed some warnings

***version 3.1 stable***
-added slice range for tolower and toupper
-added startswith() and endswith() in string lib
-added SQ_EXCLUDE_DEFAULT_MEMFUNCTIONS to exclude default mem fuction from compilation
-added sq_getreleasehook
-added thread.wakeupthrow()
-added sq_pushthread
-added \u and \U escape sequence for UTF8,UTF16 or UCS4 characters
-added CMake scripts(thx Fabian Wolff)
-the escape character \x is based on sizeof(SQChar)
-fixed several warnings(thx Markus Oberhumer)
-fixed optimizer bug in compound arith oprators(+=,-= etc...)
-fixed sq_getrefvmcount() (thx Gerrit)
-fixed sq_getrefcount() when no references were added with sq_addref() (thx Gerrit)
-fixed bug in string.tointeger() (thx Domingo)
-fixed weakref comparison in 32bit builds using doubles(thx Domingo)
-fixed compiler bug(thx Peter)
-fixed some error in the documentation(thx Alexander)
-fixed some error reporting in compiler(thx Alexander)
-fixed incorrect optional semicolon after "if block"(thx Alexander)
-fixed crash bug in compiler related to compound arith operators(+=,-= etc...) (thx Jeff1)

***2015-01-10      ***
***version 3.1 RC 1***
-added new header sqconfig.h for all optional type declarations(unicode, 64bits etc..)
-added sq_setsharedforeignptr sq_getsharedforeignptr
-added sq_setsharedreleasehook sq_getsharedreleasehook
-added escape() in sqstd string library
-added __LINE__ and __FILE__ (thx mingodad)
-widechar support on gcc builds
-now boolean can be used in constants
-reduced dependencies on C runtime library
-newthread and sq_newthread() no longer reinitialize the root table on friend VMs(thx Lucas Cardellini)
-exceptions in the _inherited metamethod are propagated(thx Lucas Cardellini)
-'in' operator performance improvement(thx unagipai and mingodad)
-fixes crash in compiler when trying to write 'base'
-fixed bug in switch statement when using locals as case values (thx mingodad)
-fixed bug in print()(thx Lucas Cardellini)

***2013-08-30          ***
***version 3.1 beta 1***
-added new scoping rule(root attached to closures)
-added closure.setroot() closure.getroot()
-added sq_setclosureroot() and sq_getclosureroot()
-added sq_setvmreleasehook() and sq_getvmreleasehook()
-added documentaion for sq_getbase()
-now string.tointeger() accepts an optional parameter 'base'
-now format accepts zeroes in the format string (thx mingodad)
-fixed bug in sqstd_createfile() (thx mingodad)
-minor buxfixes

***2012-11-10          ***
***version 3.0.4 stable***
-sq_deleteslot slot now pops the key in case of failure
-fixed bug when _get metamethod throws null
-fixed a bug in rstrip
-added some error handling
-minor bugfixes

***2012-06-19          ***
***version 3.1.0 alpha 1***
-changed in and instanceof operator precendence
-root object in closures
-added closure.setroot closure.getroot
-added sq_setclosureroot and sq_getclosureroot

***version 3.0.3 stable***
-improved error messages for _cmp(when a non integer value is returned) (thx Yexo)
-added class.newmember() built in method (thx Nam)
-added class.rawnewmember()  built in method (thx Nam)
-added sq_rawnewmember() (thx Nam)
-added sq_getversion()
-added sq_typeof()
-added sq_getclosurename()
-added file.close() in stdlib
-documented closure.getinfos() built-in method
-fixed string iteration doesn't return negative numbers for characters > 127
-fixed bug in tofloat() when converting a string with scientific notation without a decimal point (thx wr2)
-fixed potential infinite loop in array.sort() when the _cmp function is inconsistent (thx Yexo)
-fixed obscure bug in the compiler(thx yishin)
-fixed some minor bug

***2011-11-28          ***
***version 3.0.2 stable***
-added sq_gethash API
-now array.sort() is implemented with heapsort
-now floats in scientific notation also accept numbers with no '.' (eg. 1e+6 or 1e6)
-fixed some warning
-fixed some documentation
-fixed bug in GC

***2011-09-08          ***
***version 3.0.1 stable***
-added # as alternative symbol for "line comment"(mostly useful for shell scripts)
-added sq_throwobject() to throw an arbitrary object from the C API
-added alignement flag for userdata types, SQ_ALIGNMENT (thx Shigemasa)
-added rawset() and rawget() to class and instance default delegate
-changed bytecode format now ensures matching integer size and float size
-now inherited classes also inherit userdatasize
-added SQUIRREL_VERSION_NUMBER in squirrel.h and _versionnumber_ global symbol
-fixed sq_getmemberhandle
-fixed sq_getrefcount
-refactored some sqstdio code
-refactored some clone code
-refactored some stuff in the string lib
-added -s and -fno-exceptions in GCC makefile(better performance when using GCC)

***2011-03-13        ***
***version 3.0 stable***
-added sq_getcallee()
-sq_getfreevariable() also works for native closures
-minior optimizations
-removed several warning when compiling with GCC 4.x
-fixed some errors in the documentation
-fixed bug when using SQUSEDOUBLE and 32bits intengers
-fixed bug when invoking generators with closure.call() (thx huntercool)

***2010-12-19                           ***
***version 3.0 release candidate 1(RC 1)***
-improved metamethods error handling
-added parameter 'isstatic' to _newmember metamethod(thx G.Meyer)
-added sq_getrefcount() to return number of refences from C++(thx G.Meyer)

***2010-11-07        ***
***version 3.0 beta 3***
-license changed to "MIT license"
-added sq_resurrectunreachable() and resurrectunreachable()
-added callee() built in function, returns the current running closure
-added thread.getstackinfos()
-added sq_objtouserpointer()
-added sq_newtableex()
-various refactoring and optimizations
-fixed several 64bits issues regarding integer to string conversions
-fixed some bugs when SQUSEDOUBLE is used in 32bits systems

***2010-08-18          ***
***version 3.0 beta 2.1***
-fixed bug in class constructor
-fixed bug in compound arith

***2010-08-12        ***
***version 3.0 beta 2***
-class methods can be added or replaced after the class as been instantiated
-JSON compliant table syntax, this is currently an experimental feature (thx atai)
-sq_getsize() now returns userdatasize for classes and instances
-now setroottable() and setconsttable() return the previous value of the respective table
-fixed bug in compound arith operators when used on a free variable (thx ellon)
-fixed some x64 minor bugs
-fixed minor bug in the compiler
-refactored some VM internals
-documented sq_getmemberhandle, sq_getbyhandle, sq_setbyhandle to set and get value from classes

***2009-11-15        ***
***version 3.0 beta 1***
-various refactoring and optimizations
-fixed bug in free variables (thx mokehehe)
-fixed bug in functions with default parameters (thx ara & Yexo)
-fixed bug in exception handling
-improved error propagation in _set and _get metamethods ( and 'throw null' for clean failure)
-added sq_getmemberhandle, sq_getbyhandle, sq_setbyhandle to set and get value from classes

***2009-06-30         ***
***version 3.0 alpha 2***
-added real free variables(thx Paul Ruizendaal)
-added refactored function call implementation and compiler(thx Paul Ruizendaal)
-added sq_getfunctioninfo
-added compile time flag SQUSEDOUBLE to use double precision floats
-added global slot _floatsize_ int the base lib to recognize single precision and double precision builds
-sq_wakeupvm can now resume the vm with an exception
-added sqstd_format
-now blobs can be cloned
-generators can now be instantiated by calling sq_call() or closure.call()
-fixed debughook bug
-fixed cooroutine error propagation

***2008-07-23         ***
***version 3.0 alpha 1***
-first branch from 2.x source tree
-added 'base' keyword
-removed 'delegate' keyword
-now compiled scripts are vararg functions
-added setdelegate() and getdelegate() table builtin methods
-added <=> 3 ways compare operator
-added lambda expression @(a,b) a + b
-added local function statement
-added array built-in map(),reduce(),apply(),filter() and find()
-generators hold only a weak reference of the enviroment object
-removed 'vargv' and 'vargc' keywords
-now var args are passed as an array called vargv(as a paramter)
-removed 'parent' keyword
-added class getbase() built in method
-instanceof doesn't throw an exception if the left expression is not a class
-lexical scoping for free variables(free variables are no longer in the second parameter list)
-sq_setprintfunc accept error func
-sq_geterrorfunc()
-added sq_arrayremove() and sq_arrayinsert()
-error() built in function(works like print but prints using the errorfunc)
-added native debug hook

***2008-02-17        ***
***version 2.2 stable***
-added _newslot metamethod in classes
-added enums added constants
-added sq_pushconsttable, sq_setconsttable
-added default param
-added octal literals(thx Dinosaur)
-fixed debug hook, 'calls' and 'returns' are properly notified in the same number.
-fixed a coroutine bug

***2007-07-29          ***
***version 2.1.2 stable***
-new behaviour for generators iteration using foreach
now when a generator is iterated by foreach the value returned by a 'return val' statement
will terminate the iteration but will not be returned as foreach iteration
-added sq_setclassudsize()
-added sq_clear()
-added table.clear(), array.clear()
-fixed sq_cmp() (thx jyuill)
-fixed minor bugs

***2006-08-21          ***
***version 2.1.1 stable***
-vm refactoring
-optimized internal function memory layout
-new global symbol _version_ (is the version string)
-code size optimization for float literals(on 32bits float builts)
-now the raw ref API(sq_addref etc...) is fully reentrant.
-fixed a bug in sq_getdelegate() now pushes null if the object doesn't have a delegate(thx MatzeB)
-improved C reference performances in NO_GARBAGE_COLLECTOR builds
-sq_getlocal() now enumerates also outer values.
-fixed regexp library for GCC users.

***2006-03-19        ***
***version 2.1 stable***
-added static class fields, new keyword static
-added 64bits architecture support
-added global slot _intsize_ int the base lib to recognize 32bits and 64bits builds
-added functions with fixed environment, closure.bindenv() built-in function
-all types except userdata and null implement the tostring() method
-string concatenation now invokes metamethod _tostring
-new metamethods for class objects _newmember and _inherited
-sq_call() sq_resume() sq_wakeupvm() have a new signature
-new C referencing implementation(scales more with the amount of references)
-refactored hash table
-new api functions sq_newslot(),sq_tobool(),sq_getbase(), sq_instanceof(), sq_bindenv()
-the api func sq_createslot was deprecated but still supported in form of C macro on top of sq_newslot
-sq_setreleasehook() now also works for classes
-stream.readstr() and stream.writestr() have been deprecated(this affects file and blob)
-fixed squirrel.h undeclared api calls
-fixed few minor bugs
-SQChar is now defined as wchar_t
-removed warning when building with -Wall -pedantic for GCC users
-added new std io function writeclosuretofile()
-added new std string functions strip(),rstrip(),lstrip() and split()
-regular expressions operators (+,*) now have more POSIX greedyness behaviour
-class constructors are now invoked as normal functions

***2005-10-02          ***
***version 2.0.5 stable***
-fixed some 64bits incompatibilities (thx sarge)
-fixed minor bug in the stdlib format() function (thx Rick)
-fixed a bug in dofile() that was preventing to compile empty files
-added new API sq_poptop() & sq_getfreevariable()
-some performance improvements

***2005-08-14          ***
***version 2.0.4 stable***
-weak references and related API calls
-added sq_objtobool()
-class instances memory policies improved(1 mem allocation for the whole instance)
-typetags are now declared as SQUserPointer instead of unsigned int
-first pass for 64bits compatibility
-fixed minor bug in the stdio stream
-fixed a bug in format()
-fixed bug in string.tointeger() and string.tofloat()

***2005-06-24          ***
***version 2.0.3 stable***
-dofile() and loadfile() in the iolib now can decode ASCII, UTF8 files UCS2 big-endian and little-endian
-sq_setparamscheck() : now typemesk can check for null
-added string escape sequence \xhhhh
-fixed some C++ standard incompatibilities

***2005-05-15          ***
***version 2.0.2 stable***
-performances improvements (expecially for GCC users)
-removed all dependencies from C++ exception handling
-various bugfixes

***2005-04-12        ***
***version 2.0.1 stable***
-various bugfixes
-sq_setparamscheck() now allows spaces in the typemask

***2005-04-03        ***
***version 2.0 stable***
-added API sq_gettypetag()
-added built-in function to the bool type(tointeger, tostring etc...)

***2005-02-27                           ***
***version 2.0 release candidate 1(RC 1)***
-added API sq_reseterror()
-modified sq_release()
-now class instances can be cloned
-various bufixes

***2005-01-26        ***
***version 2.0 beta 1***
-added bool type
-class properties can be redefined in a derived class
-added ops *= /= and %=
-new syntax for class attributes declaration </ and /> instead of ( and )
-increased the max number of literals per function from 65535 to 16777215
-now free variables have proper lexical scoping
-added API sq_createinstance(), sq_pushbool(), sq_getbool()
-added built-in function type()
-added built-in function obj.rawin(key) in table,class and instance
-sq_rawget() and sq_rawset() now work also on classes and instances
-the VM no longer uses C++ exception handling (more suitable for embedded devices)
-various bufixes

***2004-12-21         ***
***version 2.0 alpha 2***
-globals scoping changed, now if :: is omitted the VM automatically falls back on the root table
-various bufixes
-added class level attributes

***2004-12-12         ***
***version 2.0 alpha 1***
-codebase branch from version 1.x
-added classes
-added functions with variable number of parameters(vargc & vargv and the ...)
-0 and 0.0 are now considered 'false' by all conditional statements(if,while,for,?,do-while)
-added new api functions sq_newclass() sq_setinstanceup() sq_getinstanceup() sq_getattributes() sq_setattributes()
-modified api sq_settypetag()

***2004-11-01        ***
***version 1.0 stable***
-fixed some minor bug
-improved operator 'delete' performances
-added scientific notation for float numbers( eg. 2.e16 or 2.e-2)

***2004-08-30        ***
***version 1.0 release candidate 2(RC 2)***
-fixed bug in the vm(thx Pierre Renaux)
-fixed bug in the optimizer(thx Pierre Renaux)
-fixed some bug in the documentation(thx JD)
-added new api functions for raw object handling
-removed nested multiline comments
-reduced memory footprint in C references

***2004-08-23        ***
***version 1.0 release candidate 1(RC 1)***
-fixed division by zero
-the 'in' operator and obj.rawget() do not query the default delegate anymore
-added function sq_getprintfunc()
-added new standard library 'auxlib'(implements default error handlers)

***2004-07-12        ***
***version 1.0 beta 4***
-fixed a bug in the integer.tochar() built-in method
-fixed unary minus operator
-fixed bug in dofile()
-fixed inconsistency between != and == operators(on float/integer comparison)
-added javascript style unsigned right shift operator '>>>'
-added array(size) constructor built-in function
-array.resize(size,[fill]) built-in function accepts an optional 'fill' value
-improved debug API, added sq_getclosureinfo() and sq_setnativeclosurename()

***2004-05-23        ***
***version 1.0 beta 3***
-minor vm bug fixes
-string allocation is now faster
-tables and array memory usage is now less conservative(they shrink)
-added regular expression routines in the standard library
-The 'c' expression now accepts only 1 character(thx irbrian)
-multiline strings <[ ]> have been substituted with C# style verbatim strings (eg. @"string")
-added new keyword 'parent' for accessing the delegate of tables and unserdata
-The metamethod '_clone' has been renamed '_cloned'
-the _delslot metamethod's behaviour and prototype have been changed
-new default function in the integer and float object 'tochar()'
-the built-in function chcode2string has been removed
-the default method [table].getdelegate() has been removed
-new api sq_rawdeleteslot()
-new table built-in method rawdelete(key)
-the dynamic mudule loading has been removed from the standard distribution
-some optimizations in the VM

***2004-04-21        ***
***version 1.0 beta 2***
-minor compiler/parser bug fixes
-sq_newclosure has a different prototype, the "paramscheck" of paramter has been moved to the new function sq_setparamscheck()
-sq_setparamscheck allows to add automatic parameters type checking in native closures
-sq_compile() lost the lineinfo parameter
-new api sq_enabledebuginfo() globally sets compiler's debug info generation
-added consistency check on bytecode serialization
-fixed += operator, now works on strings like +
-added global slot in the base lib _charsize_ to recognize unicode builds from ascii builds runtime
-added registry table
-new api call sq_pushregistrytable()
-added type tag to the userdata type sq_settypetag()
-sq_getuserdata now queries the userdata typetag
-the built in function collect_garbage() as been renamed collectgarbage() for consistency reasons
-new standard libraries(sqlibs are now obsolete)

***2004-02-20        ***
***version 1.0 beta 1***
-fixed a bug in the compiler (thanks Martin Kofler)
-fixed bug in the switch case statement
-fixed the _unm metamethod
-fixed minor bugs in the API
-fixed automatic stack resizing
-first beta version
    first pass code clean up in the VM and base lib
    first pass code coverege test has been done on VM and built-in lib
-new VM creation API sq_open() sq_close() (sq_newvm and sq_releasevm are now obsolete)
-new api allows to specifiy a "print" function to output text(sq_printfunc)
-added some small optimizations
-new cooperative multi-threading capabilities in the base library(coroutines), VMs are now a built in type("thread")
-new built in functions have been added for manipulating the new "thread" type
-friend virtual machines share the same root table, error handler and debug hook by default
-new compile time options

***2004-01-19       ***
***version 0.9 alpha***
-fixed a garbage collection bug
-fixed some API bugs(thanks to Joshua Jensen)
-fixed tail calls (in the version 0.8 the tail call optimization was erroneously disabled)
-new function parameters semantic, now passing a wrong number of parameters generates an exception
-native closures have now a built in parameter number checking
-sq_rawget and sq_rawset now work also on arrays
-sq_getsize now woks also on userdata
-the userdata release hook prototype is changed(now passes the size of the userdata)
-the lexer reader function now returns an integer instead of a char that allows better error checking on the input(thx Joshua Jensen)
-faster compiler
-try/catch blocks do not cause any runtime memory allocation anymore

***2003-12-06       ***
***version 0.8 alpha***
-fixed a bug that was preventing to have callable userdata throught the metamethod _call
-fixed a garbage collection bug
-fixed == operator now can compare correctly different types
-new built in method getstackinfos(level)
-improved line informations precision for the debug hook
-new api call sq_compilebuffer()
-new built-in api function compilestring()
-new syntactic sugar for function declarations inside tables
-the debug API has been finalized

***2003-11-17       ***
***version 0.7 alpha***
-fixed critical bug SQInteger the tail call system
-fixed bug in the continue statement code generation
-fixed func call param issue(thanks to Rewoonenco Andrew)
-added _delslot metamethod(thanks to Rewoonenco Andrew)
-new multiline string expression ( delimited by <[ and ]> )
-normal strings ("") do not allow embedded new line anymore
-reduced vm memory footprint(C refs are shared between friend VMs)
-new api method sq_deleteslot()
-new debug hook event 'r' is triggered when a function returns

***2003-11-04       ***
***version 0.6 alpha***
-fixed switch statement(was executing the default case after a break)
-sq_call() doesn't pop the closure (just the params)
-the vm execution can be suspended from the C API anytime (micro-threads)
-new api calls sq_suspendvm() sq_wakeupvm() sq_getvmstate() and sq_reservestack()

***2003-10-13       ***
***version 0.5 alpha***
-fixed some minor bug
-tested with non ASCII identifiers in unicode mode(I've tried chinese chars)
-added built-in function string.find()
-the built-in function array.sort() optionally accepts a cmp(a,b) function
-the debug hook function now has a new prototype debug_hook(event_type,sourcefile,line,functionname)
-fixed some debug info imprecision

***2003-10-01       ***
***version 0.4 alpha***
-faster VM
-sq_call will pop arguments and closure also in case of failure
-fixed a bug in sq_remove
-now the VM detects delegation cycles(and throws an exception)
-new operators ++ and --
-new operator ',' comma operator
-fixed some expression precedence issue
-fixed bug in sq_arraypop

***2003-09-15       ***
***version 0.3 alpha***
-fixed a bug in array::insert()
-optional Unicode core(define SQUNICODE or _UNICODE on Win32)
-sq_compiler uses a new reader function SQLEXREADFUNC
-the debug hook passes 'l' instead of 'line' for line callbacks
    and 'c' instead of 'call' for call callbacks
-new array.extend() bulit-in function
-new API sq_clone()

***2003-09-10           ***
***version 0.2 pre-alpha***
-new completely reentrant VM (sq_open and sq_close are now obsolete)
-sq_newvm() has a new prototype
-allocators are now global and linked in the VM
-_newslot meta method added
-rawset creates a slot if doesn't exists
-the compiler error callback pass the vm handle(thanks Pierre Renaux)
-sq_setforeignptr() sq_getforeingptr() are now public
-sq_resume() now is possible to resume generators from C
-sq_getlasterror() retrieve the last thrown error
-improved docs

***2003-09-06           ***
***version 0.1 pre-alpha***
first release