Difference between revisions of "Xpcall"
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__NOTOC__ | __NOTOC__ | ||
'''Available since:''' Gideros 2011.6<br/> | '''Available since:''' Gideros 2011.6<br/> | ||
| + | '''Class:''' [[(global)]]<br/> | ||
| + | |||
=== Description === | === Description === | ||
| − | + | '''pcall''' function ''f'' with a new error handler ''err''. | |
| + | <syntaxhighlight lang="lua"> | ||
| + | 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. | ||
| − | + | ||
| − | + | === Parameters === | |
| − | + | '''f''': (function) pcall function<br/> | |
| − | '''f''': (function) pcall function | + | '''err''': (string) error message<br/> |
| − | '''err''': (string) error message | + | |
| + | === 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)}} | ||
Latest revision as of 11:06, 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!
