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Towards Lua 5.5

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This commit is contained in:
Roberto Ierusalimschy 2022-12-20 13:24:43 -03:00
parent 7d6a97e42b
commit 540d805226
5 changed files with 12 additions and 129 deletions
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8
lua.h
View File

@ -17,11 +17,11 @@
#define LUA_VERSION_MAJOR "5"
#define LUA_VERSION_MINOR "4"
#define LUA_VERSION_RELEASE "5"
#define LUA_VERSION_MINOR "5"
#define LUA_VERSION_RELEASE "0"
#define LUA_VERSION_NUM 504
#define LUA_VERSION_RELEASE_NUM (LUA_VERSION_NUM * 100 + 5)
#define LUA_VERSION_NUM 505
#define LUA_VERSION_RELEASE_NUM (LUA_VERSION_NUM * 100 + 0)
#define LUA_VERSION "Lua " LUA_VERSION_MAJOR "." LUA_VERSION_MINOR
#define LUA_RELEASE LUA_VERSION "." LUA_VERSION_RELEASE

123
manual/manual.of
View File

@ -1586,7 +1586,8 @@ Each variable name may be postfixed by an attribute
@producname{attrib}@producbody{@bnfopt{@bnfter{<} @bnfNter{Name} @bnfter{>}}}
}
There are two possible attributes:
@id{const}, which declares a @x{constant variable},
@id{const}, which declares a @emph{constant} or @emph{read-only} variable,
@index{constant variable}
that is, a variable that cannot be assigned to
after its initialization;
and @id{close}, which declares a to-be-closed variable @see{to-be-closed}.
@ -9118,7 +9119,7 @@ is a more portable solution.
@simplesect{
Here we list the incompatibilities that you may find when moving a program
from @N{Lua 5.3} to @N{Lua 5.4}.
from @N{Lua 5.4} to @N{Lua 5.5}.
You can avoid some incompatibilities by compiling Lua with
appropriate options (see file @id{luaconf.h}).
@ -9155,51 +9156,6 @@ change between versions.
@itemize{
@item{
The coercion of strings to numbers in
arithmetic and bitwise operations
has been removed from the core language.
The string library does a similar job
for arithmetic (but not for bitwise) operations
using the string metamethods.
However, unlike in previous versions,
the new implementation preserves the implicit type of the numeral
in the string.
For instance, the result of @T{"1" + "2"} now is an integer,
not a float.
}
@item{
Literal decimal integer constants that overflow are read as floats,
instead of wrapping around.
You can use hexadecimal notation for such constants if you
want the old behavior
(reading them as integers with wrap around).
}
@item{
The use of the @idx{__lt} metamethod to emulate @idx{__le}
has been removed.
When needed, this metamethod must be explicitly defined.
}
@item{
The semantics of the numerical @Rw{for} loop
over integers changed in some details.
In particular, the control variable never wraps around.
}
@item{
A label for a @Rw{goto} cannot be declared where a label with the same
name is visible, even if this other label is declared in an enclosing
block.
}
@item{
When finalizing an object,
Lua does not ignore @idx{__gc} metamethods that are not functions.
Any value will be called, if present.
(Non-callable values will generate a warning,
like any other error when calling a finalizer.)
}
}
@ -9210,39 +9166,6 @@ like any other error when calling a finalizer.)
@itemize{
@item{
The function @Lid{print} does not call @Lid{tostring}
to format its arguments;
instead, it has this functionality hardwired.
You should use @idx{__tostring} to modify how values are printed.
}
@item{
The pseudo-random number generator used by the function @Lid{math.random}
now starts with a somewhat random seed.
Moreover, it uses a different algorithm.
}
@item{
By default, the decoding functions in the @Lid{utf8} library
do not accept surrogates as valid code points.
An extra parameter in these functions makes them more permissive.
}
@item{
The options @St{setpause} and @St{setstepmul}
of the function @Lid{collectgarbage} are deprecated.
You should use the new option @St{incremental} to set them.
}
@item{
The function @Lid{io.lines} now returns four values,
instead of just one.
That can be a problem when it is used as the sole
argument to another function that has optional parameters,
such as in @T{load(io.lines(filename, "L"))}.
To fix that issue,
you can wrap the call into parentheses,
to adjust its number of results to one.
}
}
@ -9254,46 +9177,6 @@ to adjust its number of results to one.
@itemize{
@item{
Full userdata now has an arbitrary number of associated user values.
Therefore, the functions @id{lua_newuserdata},
@id{lua_setuservalue}, and @id{lua_getuservalue} were
replaced by @Lid{lua_newuserdatauv},
@Lid{lua_setiuservalue}, and @Lid{lua_getiuservalue},
which have an extra argument.
For compatibility, the old names still work as macros assuming
one single user value.
Note, however, that userdata with zero user values
are more efficient memory-wise.
}
@item{
The function @Lid{lua_resume} has an extra parameter.
This out parameter returns the number of values on
the top of the stack that were yielded or returned by the coroutine.
(In previous versions,
those values were the entire stack.)
}
@item{
The function @Lid{lua_version} returns the version number,
instead of an address of the version number.
The Lua core should work correctly with libraries using their
own static copies of the same core,
so there is no need to check whether they are using the same
address space.
}
@item{
The constant @id{LUA_ERRGCMM} was removed.
Errors in finalizers are never propagated;
instead, they generate a warning.
}
@item{
The options @idx{LUA_GCSETPAUSE} and @idx{LUA_GCSETSTEPMUL}
of the function @Lid{lua_gc} are deprecated.
You should use the new option @id{LUA_GCINC} to set them.
}
}

2
testes/all.lua
View File

@ -3,7 +3,7 @@
-- See Copyright Notice at the end of this file
local version = "Lua 5.4"
local version = "Lua 5.5"
if _VERSION ~= version then
io.stderr:write("This test suite is for ", version,
", not for ", _VERSION, "\nExiting tests")

2
testes/calls.lua
View File

@ -448,7 +448,7 @@ print("testing binary chunks")
do
local header = string.pack("c4BBc6BBB",
"\27Lua", -- signature
0x54, -- version 5.4 (0x54)
0x55, -- version 5.5 (0x55)
0, -- format
"\x19\x93\r\n\x1a\n", -- data
4, -- size of instruction

6
testes/main.lua
View File

@ -134,7 +134,7 @@ RUN('env LUA_INIT= LUA_PATH=x lua %s > %s', prog, out)
checkout("x\n")
-- test LUA_PATH_version
RUN('env LUA_INIT= LUA_PATH_5_4=y LUA_PATH=x lua %s > %s', prog, out)
RUN('env LUA_INIT= LUA_PATH_5_5=y LUA_PATH=x lua %s > %s', prog, out)
checkout("y\n")
-- test LUA_CPATH
@ -143,7 +143,7 @@ RUN('env LUA_INIT= LUA_CPATH=xuxu lua %s > %s', prog, out)
checkout("xuxu\n")
-- test LUA_CPATH_version
RUN('env LUA_INIT= LUA_CPATH_5_4=yacc LUA_CPATH=x lua %s > %s', prog, out)
RUN('env LUA_INIT= LUA_CPATH_5_5=yacc LUA_CPATH=x lua %s > %s', prog, out)
checkout("yacc\n")
-- test LUA_INIT (and its access to 'arg' table)
@ -153,7 +153,7 @@ checkout("3.2\n")
-- test LUA_INIT_version
prepfile("print(X)")
RUN('env LUA_INIT_5_4="X=10" LUA_INIT="X=3" lua %s > %s', prog, out)
RUN('env LUA_INIT_5_5="X=10" LUA_INIT="X=3" lua %s > %s', prog, out)
checkout("10\n")
-- test LUA_INIT for files