lua/ltm.h, branch v5.4.9

Avoid inclusion loop in 'ltm.h'

2023-06-16T14:52:14+00:00

Details in some header files

2022-12-14T19:20:39+00:00

Identifier LUA_NUMTAGS was deprecated (changed to LUA_NUMTYPES) + better handling of some inclusion loops.

Free bit 7 of GC 'marked' field

2020-08-07T14:21:44+00:00

Tables were using this bit to indicate their array sizes were real ('isrealasize'), but this bit can be useful for tests. Instead, they can use bit 7 of their 'flag' field for that purpose. (There are only six fast-access metamethods.) This 'flag' field only exists in tables, so this use does not affect other types.

Clearer distinction between types and tags

2020-01-31T14:09:53+00:00

LUA_T* represents only types; tags (types + Variants) are represented by LUA_V* constants.

First version of OP_MMBIN opcodes

2019-08-27T16:59:39+00:00

In arithmetic/bitwise operators, the call to metamethods is made in a separate opcode following the main one. (The main opcode skips this next one when the operation succeeds.) This change reduces slightly the size of the binary and the complexity of the arithmetic/bitwise opcodes. It also simplfies the treatment of errors and yeld/resume in these operations, as there are much fewer cases to consider. (Only OP_MMBIN/OP_MMBINI/OP_MMBINK, instead of all variants of all arithmetic/bitwise operators.)

Change in the handling of 'L->top' when calling metamethods

2019-07-26T17:59:39+00:00

Instead of updating 'L->top' in every place that may call a metamethod, the metamethod functions themselves (luaT_trybinTM and luaT_callorderTM) correct the top. (When calling metamethods from the C API, however, the callers must preserve 'L->top'.)

Keep correct type for immediate operands in comparisons

2019-03-22T16:37:17+00:00

When calling metamethods for things like 'a < 3.0', which generates the opcode OP_LTI, the C register tells that the operand was converted to an integer, so that it can be corrected to float when calling a metamethod. This commit also includes some other stuff: - file 'onelua.c' added to the project - opcode OP_PREPVARARG renamed to OP_VARARGPREP - comparison opcodes rewritten through macros

New macros for arithmetic/bitwise operations in 'luaV_execute'

2018-11-05T18:10:42+00:00

The repetitive code of the arithmetic and bitwise operators in the main iterpreter loop was moved to appropriate macros. (As a detail, the function 'luaV_div' was renamed 'luaV_idiv', as it does an "integer division" (floor division).

First "complete" implementation of to-be-closed variables

2018-10-17T13:44:42+00:00

Still missing: - handling of memory errors when creating upvalue (must run closing method all the same) - interaction with coroutines

Removed extra information from RCS keyword strings

2018-08-23T17:26:12+00:00

Version numbers and dates (mostly wrong) from RCS keyword strings removed from all source files; only the file name are kept.