# Function serde_json::to_writer_pretty

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    pub fn to_writer_pretty<W, T>(writer: W, value: &T) -> Result<()> where
        W: Write,
        T: ?Sized + Serialize,

Expand description

Serialize the given data structure as pretty-printed JSON into the IO stream.

## Errors

Serialization can fail if `T`’s implementation of `Serialize` decides to fail, or if `T` contains a map with non-string keys.