Difference between revisions of "Xpcall"
From GiderosMobile
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=== Description === | === Description === | ||
'''pcall''' function ''f'' with a new error handler ''err''. | '''pcall''' function ''f'' with a new error handler ''err''. | ||
| − | < | + | <syntaxhighlight lang="lua"> |
xpcall(f,err) | xpcall(f,err) | ||
| − | </ | + | </syntaxhighlight> |
The operations related to coroutines comprise a sub-library of the basic library and come inside the table coroutine. | The operations related to coroutines comprise a sub-library of the basic library and come inside the table coroutine. | ||
| Line 14: | Line 14: | ||
'''f''': (function) pcall function<br/> | '''f''': (function) pcall function<br/> | ||
'''err''': (string) error message<br/> | '''err''': (string) error message<br/> | ||
| + | |||
| + | === Example === | ||
| + | <syntaxhighlight lang="lua"> | ||
| + | -- @oleg ;-) | ||
| + | |||
| + | function f () | ||
| + | return "a" + 2 | ||
| + | end -- f | ||
| + | |||
| + | function err(x) | ||
| + | print ("err called", x) | ||
| + | return "oh no!" | ||
| + | end -- err | ||
| + | |||
| + | print(xpcall(f, err)) | ||
| + | -- err called code.lua:512: attempt to perform arithmetic (add) on string and number | ||
| + | -- false oh no! | ||
| + | </syntaxhighlight> | ||
{{(global)}} | {{(global)}} | ||
Latest revision as of 12:06, 5 October 2023
Available since: Gideros 2011.6
Class: (global)
Description
pcall function f with a new error handler err.
xpcall(f,err)
The operations related to coroutines comprise a sub-library of the basic library and come inside the table coroutine.
Parameters
f: (function) pcall function
err: (string) error message
Example
-- @oleg ;-)
function f ()
return "a" + 2
end -- f
function err(x)
print ("err called", x)
return "oh no!"
end -- err
print(xpcall(f, err))
-- err called code.lua:512: attempt to perform arithmetic (add) on string and number
-- false oh no!
