3 * Changes since version 2.5 (no versions between 2.5 and 3.0)
4 + NEW CONCEPT: "tag methods".
5 Tag methods replace fallbacks as the meta-mechanism for extending the
6 semantics of Lua. Whereas fallbacks had a global nature, tag methods
7 work on objects having the same tag (e.g., groups of tables).
8 Existing code that uses fallbacks should work without change.
9 + new, general syntax for constructors {[exp] = exp, ... }.
10 + support for handling variable number of arguments in functions (varargs).
11 + support for conditional compilation ($if ... $else ... $end).
12 + cleaner semantics in API simplifies host code.
13 + better support for writing libraries (auxlib.h).
14 + better type checking and error messages in the standard library.
15 + luac can now also undump.
17 * Changes since version 2.4
18 + io and string libraries are now based on pattern matching;
19 the old libraries are still available for compatibility
20 + dofile and dostring can now return values (via return statement)
21 + better support for 16- and 64-bit machines
22 + expanded documentation, with more examples
24 * Changes since version 2.2
25 + external compiler creates portable binary files that can be loaded faster
26 + interface for debugging and profiling
27 + new "getglobal" fallback
28 + new functions for handling references to Lua objects
29 + new functions in standard lib
30 + only one copy of each string is stored
31 + expanded documentation, with more examples
33 * Changes since version 2.1
34 + functions now may be declared with any "lvalue" as a name
35 + garbage collection of functions
38 * Changes since version 1.1
39 + object-oriented support
41 + simplified syntax for tables
42 + many internal improvements