This is something that was fixed in the forthcoming TOML 1.0 spec. Parsers that have been updated to support it will allow heterogeneous types in arrays, which

This is something that was fixed in the forthcoming TOML 1.0 spec. Parsers that have been updated to support it will allow heterogeneous types in arrays, which your application can convert to a vector of floats or whatever collection type it uses internally.