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use serde_derive::{Deserialize, Serialize};
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bitflags::bitflags! {

            

        

            

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    #[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Serialize, Deserialize)]

            

        

            

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    pub struct Extensions: usize {

            

        

            

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        const UNWRAP_NEWTYPES = 0x1;

            

        

            

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        const IMPLICIT_SOME = 0x2;

            

        

            

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        const UNWRAP_VARIANT_NEWTYPES = 0x4;

            

        

            

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        /// During serialization, this extension emits struct names. See also [`PrettyConfig::struct_names`](crate::ser::PrettyConfig::struct_names) for the [`PrettyConfig`](crate::ser::PrettyConfig) equivalent.

            

        

            

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        ///

            

        

            

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        /// During deserialization, this extension requires that structs' names are stated explicitly.

            

        

            

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        const EXPLICIT_STRUCT_NAMES = 0x8;

            

        

            

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    }

            

        

            

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}

            

        

            

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// GRCOV_EXCL_STOP

            

        

            

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impl Extensions {

            

        

            

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    /// Creates an extension flag from an ident.

            

        

            

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    #[must_use]

            

        

            

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    pub fn from_ident(ident: &str) -> Option<Extensions> {

            

        

            

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        for (name, extension) in Extensions::all().iter_names() {

            

        

            

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            if ident == name.to_lowercase() {

            

        

            

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                return Some(extension);

            

        

            

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            }

            

        

            

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        }

            

        

            

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        None

            

        

            

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    }

            

        

            

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}

            

        

            

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// GRCOV_EXCL_START

            

        

            

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impl Default for Extensions {

            

        

            

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    fn default() -> Self {

            

        

            

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        Extensions::empty()

            

        

            

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    }

            

        

            

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}

            

        

            

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// GRCOV_EXCL_STOP

            

        

            

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#[cfg(test)]

            

        

            

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mod tests {

            

        

            

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    use super::Extensions;

            

        

            

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    fn roundtrip_extensions(ext: Extensions) {

            

        

            

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        let ron = crate::to_string(&ext).unwrap();

            

        

            

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        let ext2: Extensions = crate::from_str(&ron).unwrap();

            

        

            

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        assert_eq!(ext, ext2);

            

        

            

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    }

            

        

            

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    #[test]

            

        

            

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    fn test_extension_serde() {

            

        

            

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        // iterate over the powerset of all extensions (i.e. every possible combination of extensions)

            

        

            

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        for bits in Extensions::empty().bits()..=Extensions::all().bits() {

            

        

            

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            let extensions = Extensions::from_bits_retain(bits);

            

        

            

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            roundtrip_extensions(extensions);

            

        

            

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        }

            

        

            

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    }

            

        

            

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}