dostring that aborts on errors?
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- Subject: dostring that aborts on errors?
- From: edrx@... (Eduardo Ochs)
- Date: 2001年10月13日 17:21:15 -0300 (BRT)
Hi list,
How do I write a "non-trapping" version of the "dostring" function
that will propagates errors instead of just returning a nil and an error
string? The default behaviour is that this code
lua -e '
print(dostring("return 1, 2")) --> 1 2
print(dostring("return")) --> userdata(0): 0x804f658
print(dostring("return nil")) --> nil
print(dostring("foo()")) --> [error, then:] nil run-time error
print("Program continues...")
print(dostring("return nil, \"run-time error\""))
'
gives this output:
1 2
userdata(0): 0x804f658
nil
error: attempt to call global `foo' (a nil value)
stack traceback:
1: main of string "foo()" at line 1
2: function `dostring' [C]
3: main of string "..." at line 5
nil run-time error
Program continues...
nil run-time error
and I'd like to have a "hard_dostring" function that would act as
"dostring" but would return nothing in a case like
'print(hard_dostring("return"))', and would make the program abort in
a case like 'print(dostring("foo()"))'...
C solutions would be fine... BTW, I'm using Lua-4.0 on an i386 running
Debian GNU/Linux.
Cheers, and thanks in advance,
Eduardo Ochs
http://angg.twu.net/
http://angg.twu.net/index.html#lua