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Sam Roberts skrev: [...]
So, calling lua_tostring() on a value that had a __tostring metamethod would remove it from the stack, replacing it with a string. Some people already don't like auto-coercions between number and string, can you imagine the trouble it would cause to have your user-data auto-coerced to strings? :-(
This is not a problem. The only place the user-data or other type will be replaced with a string is in the stack where the string.format routine collects it's arguments. The original value will remain the same, at another safe location in the stack.
//Andreas