“Module:Protect/doc”的意思、由来-开放百科全书

词条 Module:Protect/doc

释义

Usage
Arguments Return value
Example

This metamodule simplifies error handling in other modules. It transforms a function, which may throw an error, into a function, which returns a specified error message in that case.

Usage

 local protect = require('Module:Protect') local protectedFunc = '''protect(''func'', ''errFormat'', ''options'')'''

Arguments

{{code|func}}

Function to be transformed.

{{code|errFormat}} (default: {{code|'Error: %s'}})

Custom error message.

Use {{code|'%s'}} to include the message from a caught error.

{{code|options}} – optional table with the following fields:
- {{code|raw}} (default: false)
- : If true, then {{code|errFormat}} will be used as is, otherwise it will be wrapped inside a tag <strong class="error">.
- {{code|removeLocation}} (default: true)
- : If true, removes location information from caught error messages.

Return value

The resulting {{code|protectedFunc}} is a function, which calls the original function {{code|func}}, passing all arguments to it, and returns all its return values. If {{code|func}} throws an error, the specified error message is returned instead.

Example

 local protect = require('Module:Protect')  local p = {}  function p.main(frame)     if not frame.args[1] then         error('missing argument')     end     return frame.args[1] end  p.main = '''protect'''(p.main)  return p

Invoking the main function without arguments will output: Error: missing argument

{{#ifeq:{{SUBPAGENAME}}|sandbox | |

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2 : Error-handling modules|Lua metamodules

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