--- /dev/null
+HISTORY for Lua 5.1
+
+* Changes from version 5.0 to 5.1
+ -------------------------------
+ Language:
+ + new module system.
+ + new semantics for control variables of fors.
+ + new semantics for setn/getn.
+ + new syntax/semantics for varargs.
+ + new long strings and comments.
+ + new `mod' operator (`%')
+ + new length operator #t
+ + metatables for all types
+ API:
+ + new functions: lua_createtable, lua_get(set)field, lua_push(to)integer.
+ + user supplies memory allocator (lua_open becomes lua_newstate).
+ + luaopen_* functions must be called through Lua.
+ Implementation:
+ + new configuration scheme via luaconf.h.
+ + incremental garbage collection.
+ + better handling of end-of-line in the lexer.
+ + fully reentrant parser (new Lua function `load')
+ + better support for 64-bit machines.
+ + native loadlib support for Mac OS X.
+ + standard distribution in only one library (lualib.a merged into lua.a)
+
+* Changes from version 4.0 to 5.0
+ -------------------------------
+ Language:
+ + lexical scoping.
+ + Lua coroutines.
+ + standard libraries now packaged in tables.
+ + tags replaced by metatables and tag methods replaced by metamethods,
+ stored in metatables.
+ + proper tail calls.
+ + each function can have its own global table, which can be shared.
+ + new __newindex metamethod, called when we insert a new key into a table.
+ + new block comments: --[[ ... ]].
+ + new generic for.
+ + new weak tables.
+ + new boolean type.
+ + new syntax "local function".
+ + (f()) returns the first value returned by f.
+ + {f()} fills a table with all values returned by f.
+ + \n ignored in [[\n .
+ + fixed and-or priorities.
+ + more general syntax for function definition (e.g. function a.x.y:f()...end).
+ + more general syntax for function calls (e.g. (print or write)(9)).
+ + new functions (time/date, tmpfile, unpack, require, load*, etc.).
+ API:
+ + chunks are loaded by using lua_load; new luaL_loadfile and luaL_loadbuffer.
+ + introduced lightweight userdata, a simple "void*" without a metatable.
+ + new error handling protocol: the core no longer prints error messages;
+ all errors are reported to the caller on the stack.
+ + new lua_atpanic for host cleanup.
+ + new, signal-safe, hook scheme.
+ Implementation:
+ + new license: MIT.
+ + new, faster, register-based virtual machine.
+ + support for external multithreading and coroutines.
+ + new and consistent error message format.
+ + the core no longer needs "stdio.h" for anything (except for a single
+ use of sprintf to convert numbers to strings).
+ + lua.c now runs the environment variable LUA_INIT, if present. It can
+ be "@filename", to run a file, or the chunk itself.
+ + support for user extensions in lua.c.
+ sample implementation given for command line editing.
+ + new dynamic loading library, active by default on several platforms.
+ + safe garbage-collector metamethods.
+ + precompiled bytecodes checked for integrity (secure binary dostring).
+ + strings are fully aligned.
+ + position capture in string.find.
+ + read('*l') can read lines with embedded zeros.
+
+* Changes from version 3.2 to 4.0
+ -------------------------------
+ Language:
+ + new "break" and "for" statements (both numerical and for tables).
+ + uniform treatment of globals: globals are now stored in a Lua table.
+ + improved error messages.
+ + no more '$debug': full speed *and* full debug information.
+ + new read form: read(N) for next N bytes.
+ + general read patterns now deprecated.
+ (still available with -DCOMPAT_READPATTERNS.)
+ + all return values are passed as arguments for the last function
+ (old semantics still available with -DLUA_COMPAT_ARGRET)
+ + garbage collection tag methods for tables now deprecated.
+ + there is now only one tag method for order.
+ API:
+ + New API: fully re-entrant, simpler, and more efficient.
+ + New debug API.
+ Implementation:
+ + faster than ever: cleaner virtual machine and new hashing algorithm.
+ + non-recursive garbage-collector algorithm.
+ + reduced memory usage for programs with many strings.
+ + improved treatment for memory allocation errors.
+ + improved support for 16-bit machines (we hope).
+ + code now compiles unmodified as both ANSI C and C++.
+ + numbers in bases other than 10 are converted using strtoul.
+ + new -f option in Lua to support #! scripts.
+ + luac can now combine text and binaries.
+
+* Changes from version 3.1 to 3.2
+ -------------------------------
+ + redirected all output in Lua's core to _ERRORMESSAGE and _ALERT.
+ + increased limit on the number of constants and globals per function
+ (from 2^16 to 2^24).
+ + debugging info (lua_debug and hooks) moved into lua_state and new API
+ functions provided to get and set this info.
+ + new debug lib gives full debugging access within Lua.
+ + new table functions "foreachi", "sort", "tinsert", "tremove", "getn".
+ + new io functions "flush", "seek".
+
+* Changes from version 3.0 to 3.1
+ -------------------------------
+ + NEW FEATURE: anonymous functions with closures (via "upvalues").
+ + new syntax:
+ - local variables in chunks.
+ - better scope control with DO block END.
+ - constructors can now be also written: { record-part; list-part }.
+ - more general syntax for function calls and lvalues, e.g.:
+ f(x).y=1
+ o:f(x,y):g(z)
+ f"string" is sugar for f("string")
+ + strings may now contain arbitrary binary data (e.g., embedded zeros).
+ + major code re-organization and clean-up; reduced module interdependecies.
+ + no arbitrary limits on the total number of constants and globals.
+ + support for multiple global contexts.
+ + better syntax error messages.
+ + new traversal functions "foreach" and "foreachvar".
+ + the default for numbers is now double.
+ changing it to use floats or longs is easy.
+ + complete debug information stored in pre-compiled chunks.
+ + sample interpreter now prompts user when run interactively, and also
+ handles control-C interruptions gracefully.
+
+* Changes from version 2.5 to 3.0
+ -------------------------------
+ + NEW CONCEPT: "tag methods".
+ Tag methods replace fallbacks as the meta-mechanism for extending the
+ semantics of Lua. Whereas fallbacks had a global nature, tag methods
+ work on objects having the same tag (e.g., groups of tables).
+ Existing code that uses fallbacks should work without change.
+ + new, general syntax for constructors {[exp] = exp, ... }.
+ + support for handling variable number of arguments in functions (varargs).
+ + support for conditional compilation ($if ... $else ... $end).
+ + cleaner semantics in API simplifies host code.
+ + better support for writing libraries (auxlib.h).
+ + better type checking and error messages in the standard library.
+ + luac can now also undump.
+
+* Changes from version 2.4 to 2.5
+ -------------------------------
+ + io and string libraries are now based on pattern matching;
+ the old libraries are still available for compatibility
+ + dofile and dostring can now return values (via return statement)
+ + better support for 16- and 64-bit machines
+ + expanded documentation, with more examples
+
+* Changes from version 2.2 to 2.4
+ -------------------------------
+ + external compiler creates portable binary files that can be loaded faster
+ + interface for debugging and profiling
+ + new "getglobal" fallback
+ + new functions for handling references to Lua objects
+ + new functions in standard lib
+ + only one copy of each string is stored
+ + expanded documentation, with more examples
+
+* Changes from version 2.1 to 2.2
+ -------------------------------
+ + functions now may be declared with any "lvalue" as a name
+ + garbage collection of functions
+ + support for pipes
+
+* Changes from version 1.1 to 2.1
+ -------------------------------
+ + object-oriented support
+ + fallbacks
+ + simplified syntax for tables
+ + many internal improvements
+
+(end of HISTORY)
projects / redis.git / blobdiff