tremor_value/value/
static.rs

// Copyright 2021, The Tremor Team
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use std::ops::Deref;

use crate::value::Value;

/// avoiding lifetime issues with generics
/// See: <https://github.com/rust-lang/rust/issues/64552>
#[derive(Debug, Clone, PartialEq)]
pub struct StaticValue(Value<'static>);

impl StaticValue {
    /// extract the inner `Value`
    #[must_use]
    pub fn into_value(self) -> Value<'static> {
        self.0
    }

    /// get a reference to the inner value
    #[must_use]
    pub fn value(&self) -> &Value<'static> {
        &self.0
    }
}
impl AsRef<Value<'static>> for StaticValue {
    fn as_ref(&self) -> &Value<'static> {
        &self.0
    }
}
impl Deref for StaticValue {
    type Target = Value<'static>;

    fn deref(&self) -> &Self::Target {
        &self.0
    }
}

impl From<Value<'static>> for StaticValue {
    fn from(value: Value<'static>) -> Self {
        Self(value)
    }
}
impl<'de> serde::de::Deserialize<'de> for StaticValue {
    fn deserialize<D>(deserializer: D) -> std::result::Result<Self, D::Error>
    where
        D: serde::Deserializer<'de>,
    {
        Value::deserialize(deserializer).map(|value| StaticValue(value.into_static()))
    }
}
impl serde::Serialize for StaticValue {
    fn serialize<S>(&self, serializer: S) -> std::result::Result<S::Ok, S::Error>
    where
        S: serde::Serializer,
    {
        self.0.serialize(serializer)
    }
}
impl std::fmt::Display for StaticValue {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        self.0.fmt(f)
    }
}

#[cfg(test)]
mod test {
    use super::*;

    #[test]
    fn for_coverage() {
        let from_null = StaticValue::from(Value::const_null());
        assert_eq!(from_null.to_string(), "null");
    }
}
tremor_value/value/static.rs

tremor_value/value/
static.rs
