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Changes in the warning system

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- The warning functions get an extra parameter that tells whether
message is to be continued (instead of using end-of-lines as a signal).

- The user data for the warning function is a regular value, instead
of a writable slot inside the Lua state.
This commit is contained in:
Roberto Ierusalimschy
2019-03-14 15:30:54 -03:00
parent 9eca305e75
commit b56d4e570a
12 changed files with 79 additions and 98 deletions
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26
manual/manual.of
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@@ -4061,7 +4061,7 @@ If @id{index} @N{is 0}, then all stack elements are removed.
Sets the @x{warning function} to be used by Lua to emit warnings
@see{lua_WarnFunction}.
The @id{ud} parameter initializes the slot @id{pud} passed to
The @id{ud} parameter sets the value @id{ud} passed to
the warning function.
}
@@ -4325,25 +4325,24 @@ Returns the version number of this core.
}
@APIEntry{
typedef void (*lua_WarnFunction) (void **pud, const char *msg);|
typedef void (*lua_WarnFunction) (void *ud, const char *msg, int tocont);|
The type of @x{warning function}s, called by Lua to emit warnings.
The first parameter is the address of a writable slot,
constant for a given Lua state and
initialized by @Lid{lua_setwarnf}.
The first parameter is an opaque pointer
set by @Lid{lua_setwarnf}.
The second parameter is the warning message.
This function should assume that
a message not ending with an end-of-line will be
continued by the message in the next call.
The third parameter is a boolean that
indicates whether the message is
to be continued by the message in the next call.
}
@APIEntry{
void lua_warning (lua_State *L, const char *msg);|
void lua_warning (lua_State *L, const char *msg, int tocont);|
@apii{0,0,-}
Emits a warning with the given message.
A message not ending with an end-of-line should be
A message in a call with @id{tocont} true should be
continued in another call to this function.
}
@@ -6275,11 +6274,12 @@ The current value of this variable is @St{Lua 5.4}.
}
@LibEntry{warn (message)|
@LibEntry{warn (message [, tocont])|
Emits a warning with the given message.
Note that messages not ending with an end-of-line
are assumed to be continued by the message in the next call.
A message in a call with @id{tocont} true should be
continued in another call to this function.
The default for @id{tocont} is false.
}