[][src]Struct arithmetic_eval::fns::Dbg

pub struct Dbg;
This is supported on crate feature std only.

Acts similarly to the dbg! macro, outputting the argument(s) to stderr and returning them. If a single argument is provided, it's returned as-is; otherwise, the arguments are wrapped into a tuple.

Examples

let program = "dbg(1 + 2) > 2.5";
let program = Untyped::<F32Grammar>::parse_statements(program)?;
let module = Environment::new()
    .insert_native_fn("dbg", fns::Dbg)
    .compile_module("test_assert", &program)?;

let value = module.run()?;
// Should output `[test_assert:1:5] 1 + 2 = 3` to stderr.
assert_eq!(value, Value::Bool(true));

Trait Implementations

impl Clone for Dbg[src]

impl Copy for Dbg[src]

impl Debug for Dbg[src]

impl Default for Dbg[src]

impl<T: Display> NativeFn<T> for Dbg[src]

Auto Trait Implementations

impl RefUnwindSafe for Dbg

impl Send for Dbg

impl Sync for Dbg

impl Unpin for Dbg

impl UnwindSafe for Dbg

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized
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impl<T> Borrow<T> for T where
    T: ?Sized
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impl<T> BorrowMut<T> for T where
    T: ?Sized
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impl<T> Conv for T

impl<T> Conv for T

impl<T> FmtForward for T

impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 
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impl<T> Pipe for T where
    T: ?Sized

impl<T> Pipe for T

impl<T> PipeAsRef for T

impl<T> PipeBorrow for T

impl<T> PipeDeref for T

impl<T> PipeRef for T

impl<T> Tap for T

impl<T> Tap for T

impl<T, U> TapAsRef<U> for T where
    U: ?Sized

impl<T, U> TapBorrow<U> for T where
    U: ?Sized

impl<T> TapDeref for T

impl<T> ToOwned for T where
    T: Clone
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type Owned = T

The resulting type after obtaining ownership.

impl<T> TryConv for T

impl<T> TryConv for T

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.

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.

impl<V, T> VZip<V> for T where
    V: MultiLane<T>,