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use std::convert::TryFrom; use failure::Error; use crate::bolt::value::Float; use crate::error::ValueError; use crate::Value; impl From<Float> for f64 { fn from(float: Float) -> Self { float.value } } impl TryFrom<Value> for f64 { type Error = Error; fn try_from(value: Value) -> Result<Self, Self::Error> { match value { Value::Float(float) => Ok(float), _ => Err(ValueError::InvalidConversion(value).into()), } } }