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// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

/// When writing a match expression against `QueryParser`, it is important to ensure
/// your code is forward-compatible. That is, if a match arm handles a case for a
/// feature that is supported by the service but has not been represented as an enum
/// variant in a current version of SDK, your code should continue to work when you
/// upgrade SDK to a future version in which the enum does include a variant for that
/// feature.
///
/// Here is an example of how you can make a match expression forward-compatible:
///
/// ```text
/// # let queryparser = unimplemented!();
/// match queryparser {
///     QueryParser::Dismax => { /* ... */ },
///     QueryParser::Lucene => { /* ... */ },
///     QueryParser::Simple => { /* ... */ },
///     QueryParser::Structured => { /* ... */ },
///     other @ _ if other.as_str() == "NewFeature" => { /* handles a case for `NewFeature` */ },
///     _ => { /* ... */ },
/// }
/// ```
/// The above code demonstrates that when `queryparser` represents
/// `NewFeature`, the execution path will lead to the second last match arm,
/// even though the enum does not contain a variant `QueryParser::NewFeature`
/// in the current version of SDK. The reason is that the variable `other`,
/// created by the `@` operator, is bound to
/// `QueryParser::Unknown(UnknownVariantValue("NewFeature".to_owned()))`
/// and calling `as_str` on it yields `"NewFeature"`.
/// This match expression is forward-compatible when executed with a newer
/// version of SDK where the variant `QueryParser::NewFeature` is defined.
/// Specifically, when `queryparser` represents `NewFeature`,
/// the execution path will hit the second last match arm as before by virtue of
/// calling `as_str` on `QueryParser::NewFeature` also yielding `"NewFeature"`.
///
/// Explicitly matching on the `Unknown` variant should
/// be avoided for two reasons:
/// - The inner data `UnknownVariantValue` is opaque, and no further information can be extracted.
/// - It might inadvertently shadow other intended match arms.
#[allow(missing_docs)] // documentation missing in model
#[non_exhaustive]
#[derive(
    ::std::clone::Clone,
    ::std::cmp::Eq,
    ::std::cmp::Ord,
    ::std::cmp::PartialEq,
    ::std::cmp::PartialOrd,
    ::std::fmt::Debug,
    ::std::hash::Hash,
)]
pub enum QueryParser {
    #[allow(missing_docs)] // documentation missing in model
    Dismax,
    #[allow(missing_docs)] // documentation missing in model
    Lucene,
    #[allow(missing_docs)] // documentation missing in model
    Simple,
    #[allow(missing_docs)] // documentation missing in model
    Structured,
    /// `Unknown` contains new variants that have been added since this code was generated.
    Unknown(crate::primitives::UnknownVariantValue),
}
impl ::std::convert::From<&str> for QueryParser {
    fn from(s: &str) -> Self {
        match s {
            "dismax" => QueryParser::Dismax,
            "lucene" => QueryParser::Lucene,
            "simple" => QueryParser::Simple,
            "structured" => QueryParser::Structured,
            other => QueryParser::Unknown(crate::primitives::UnknownVariantValue(other.to_owned())),
        }
    }
}
impl ::std::str::FromStr for QueryParser {
    type Err = ::std::convert::Infallible;

    fn from_str(s: &str) -> ::std::result::Result<Self, <Self as ::std::str::FromStr>::Err> {
        ::std::result::Result::Ok(QueryParser::from(s))
    }
}
impl QueryParser {
    /// Returns the `&str` value of the enum member.
    pub fn as_str(&self) -> &str {
        match self {
            QueryParser::Dismax => "dismax",
            QueryParser::Lucene => "lucene",
            QueryParser::Simple => "simple",
            QueryParser::Structured => "structured",
            QueryParser::Unknown(value) => value.as_str(),
        }
    }
    /// Returns all the `&str` representations of the enum members.
    pub const fn values() -> &'static [&'static str] {
        &["dismax", "lucene", "simple", "structured"]
    }
}
impl ::std::convert::AsRef<str> for QueryParser {
    fn as_ref(&self) -> &str {
        self.as_str()
    }
}