# Struct rustc_trait_selection::traits::solve::Goal

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    pub struct Goal<'tcx, P> {
        pub predicate: P,
        pub param_env: ParamEnv<'tcx>,
    }

Expand description

A goal is a statement, i.e. `predicate`, we want to prove given some assumptions, i.e. `param_env`.

Most of the time the `param_env` contains the `where`-bounds of the function we’re currently typechecking while the `predicate` is some trait bound.

## Fields§

§`predicate: P`§`param_env: ParamEnv<'tcx>`

## Auto Trait Implementations§

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### impl<'tcx, P> !RefUnwindSafe for Goal<'tcx, P>

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### impl<'tcx, P> Send for Goal<'tcx, P>
where P: Send,

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### impl<'tcx, P> Sync for Goal<'tcx, P>
where P: Sync,

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### impl<'tcx, P> Unpin for Goal<'tcx, P>
where P: Unpin,

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### impl<'tcx, P> !UnwindSafe for Goal<'tcx, P>

## Blanket Implementations§

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### impl<T> Any for T
where T: 'static + ?Sized,

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#### fn type_id(&self) -> TypeId

Gets the `TypeId` of `self`. Read more
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### impl<T> Borrow<T> for T
where T: ?Sized,

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#### fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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### impl<T> BorrowMut<T> for T
where T: ?Sized,

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#### fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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### impl<T> From<T> for T

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#### fn from(t: T) -> T

Returns the argument unchanged.

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### impl<T, U> Into<U> for T
where U: From<T>,

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#### fn into(self) -> U

Calls `U::from(self)`.

That is, this conversion is whatever the implementation of `From<T> for U` chooses to do.

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### impl<T> ToOwned for T
where T: Clone,

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#### type Owned = T

The resulting type after obtaining ownership.
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#### fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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#### fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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### impl<T, U> TryFrom<U> for T
where U: Into<T>,

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#### type Error = Infallible

The type returned in the event of a conversion error.
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#### fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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### impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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#### type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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#### fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

## Layout§

Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.