Trait OrOptParse 

pub trait OrOptParse<'db, Variant1> {
    // Required method
    fn or_opt_parse<Enum, Variant2>(
        self,
        db: &'db dyn Db,
        parser: &mut Parser<'_, 'db>,
    ) -> Result<Option<Enum>, ParseFail<'db>>
       where Variant1: Into<Enum>,
             Variant2: Parse<'db, Output: Into<Enum>>;
}

Required Methods

fn or_opt_parse<Enum, Variant2>( self, db: &'db dyn Db, parser: &mut Parser<'_, 'db>, ) -> Result<Option<Enum>, ParseFail<'db>>

where Variant1: Into<Enum>, Variant2: Parse<'db, Output: Into<Enum>>,

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl<'db, Variant1> OrOptParse<'db, Variant1> for Result<Option<Variant1>, ParseFail<'db>>

fn or_opt_parse<Enum, Variant2>( self, db: &'db dyn Db, parser: &mut Parser<'_, 'db>, ) -> Result<Option<Enum>, ParseFail<'db>>

where Variant1: Into<Enum>, Variant2: Parse<'db, Output: Into<Enum>>,

Implementors