'number
+ (
'number
 
_
, 
'number
 
_)
Magic overloaded operator '+'
This operator is defined only on
int, float, stringThe overloading of this operator is resolved at compile time, which means that
if the context does not give enough type information for inferring one of the supported type,
this will raise an error during the compilation, inviting the user to add a type annotation.

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