Struct ffx_writer::Writer

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pub struct Writer { /* private fields */ }
Expand description

This is the legacy writer that doesn’t impose any particular type of the machine output. It should not be used in new code.

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impl Writer

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pub fn new(format: Option<Format>) -> Self

Create a new Writer with the specified format.

Passing None for format implies no output via the machine function.

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pub fn new_test(format: Option<Format>) -> Self

Create a new Writer with the specified format that captures all output for later replay.

Passing None for format implies no output via the machine function.

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pub fn test_output(&self) -> Result<String>

Get all output that would have been generated on standard output by this object.

An error will be returned if this method is called on a non-test instance.

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pub fn test_error(&self) -> Result<String>

Get all output that would have been generated on standard error by this object.

An error will be returned if this method is called on a non-test instance.

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pub fn machine<T: Serialize>(&self, output: &T) -> Result<()>

Writes machine consumable output to standard output.

This is a no-op if is_machine returns false.

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pub fn is_machine(&self) -> bool

Returns true if the receiver was configured to output for machines.

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pub fn write(&self, value: impl Display) -> Result<()>

Writes the value to standard output without a newline.

This is a no-op if is_machine returns true.

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pub fn line(&self, value: impl Display) -> Result<()>

Writes the value to standard output with a newline.

This is a no-op if is_machine returns true.

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pub fn info(&self, value: impl Display) -> Result<()>

Writes the value to standard error with a newline.

This is output regardless of the value that is_machine returns.

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pub fn error(&self, value: impl Display) -> Result<()>

Writes the value to standard error with a newline.

This is output regardless of the value that is_machine returns.

Trait Implementations§

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impl Clone for Writer

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fn clone(&self) -> Writer

Returns a copy of the value. Read more
1.0.0 · source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Writer

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Default for Writer

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fn default() -> Writer

Returns the “default value” for a type. Read more
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impl Write for Writer

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fn write(&mut self, buf: &[u8]) -> Result<usize>

Write a buffer into this writer, returning how many bytes were written. Read more
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fn flush(&mut self) -> Result<()>

Flush this output stream, ensuring that all intermediately buffered contents reach their destination. Read more
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fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize, Error>

Like write, except that it writes from a slice of buffers. Read more
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fn is_write_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)
Determines if this Writer has an efficient write_vectored implementation. Read more
1.0.0 · source§

fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this writer. Read more
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fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>

🔬This is a nightly-only experimental API. (write_all_vectored)
Attempts to write multiple buffers into this writer. Read more
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fn write_fmt(&mut self, fmt: Arguments<'_>) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered. Read more
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fn by_ref(&mut self) -> &mut Self
where Self: Sized,

Creates a “by reference” adapter for this instance of Write. Read more

Auto Trait Implementations§

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> DynClone for T
where T: Clone,

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fn __clone_box(&self, _: Private) -> *mut ()

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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.