Substitute variables in a string contained in args[0]. The substitution values begin with args[1]

Substitute variables in a fmt string

Substitute variables in a fmt string. The following variables are supported:

~v

Take next argument as string. If the argument is ErlAtom, it's name is used. If the argument is ErlVar it's name is used with the type if the fmt string doesn't have the variable type specification (e.g. A::integer()), or the name is used verbatim, if the variable type is present in the format string. Finally if the argument is not ErlAtom and ErlVar, it's inserted as string verbatim

~w

Format next argument as string

~i

Skip next argument

~c

Format next argument as the character