target_spec

Struct Triple

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

A single, specific target, uniquely identified by a triple.

A Triple may be constructed through new or the FromStr implementation.

Every Platform is backed by one of these.

§Standard and custom platforms

target-spec recognizes two kinds of platforms:

  • Standard platforms: These platforms are only specified by their triple string, either directly or via a Triple. For example, the platform x86_64-unknown-linux-gnu is a standard platform since it is recognized by Rust.

    All builtin platforms are standard platforms.

    By default, if a platform isn’t builtin, target-spec attempts to heuristically determine the characteristics of the platform based on the triple string. (Use the new_strict constructor to disable this.)

  • Custom platforms: These platforms are specified via both a triple string and a JSON file in the format defined by Rust. Custom platforms are used for targets not recognized by Rust.

§Examples

use target_spec::Triple;

// Parse a simple target.
let target = Triple::new("x86_64-unknown-linux-gnu").unwrap();
// This is not a valid triple.
let err = Triple::new("cannot-be-known").unwrap_err();

Implementations§

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impl Triple

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pub fn new( triple_str: impl Into<Cow<'static, str>>, ) -> Result<Self, TripleParseError>

Creates a new Triple from a triple string.

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pub fn new_strict( triple_str: impl Into<Cow<'static, str>>, ) -> Result<Self, TripleParseError>

Creates a new Triple from a triple string.

This constructor only consults the builtin platform table, and does not attempt to heuristically determine the platform’s characteristics based on the triple string.

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pub fn as_str(&self) -> &str

Returns the string corresponding to this triple.

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pub fn is_standard(&self) -> bool

Returns true if this is a triple corresponding to a standard platform.

A standard platform can be either builtin, or heuristically determined.

§Examples
use target_spec::Triple;

// x86_64-unknown-linux-gnu is Linux x86_64.
let platform = Triple::new("x86_64-unknown-linux-gnu").unwrap();
assert!(platform.is_standard());
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pub fn is_builtin(&self) -> bool

Returns true if this is a triple corresponding to a builtin platform.

§Examples
use target_spec::Triple;

// x86_64-unknown-linux-gnu is Linux x86_64, which is a Rust tier 1 platform.
let triple = Triple::new("x86_64-unknown-linux-gnu").unwrap();
assert!(triple.is_builtin());
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pub fn is_heuristic(&self) -> bool

Returns true if this triple was heuristically determined.

All heuristically determined platforms are standard, but most of the time, standard platforms are builtin.

§Examples
use target_spec::Triple;

// armv5te-apple-darwin is not a real platform, but target-spec can heuristically
// guess at its characteristics.
let triple = Triple::new("armv5te-apple-darwin").unwrap();
assert!(triple.is_heuristic());
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pub fn is_custom(&self) -> bool

Returns true if this is a custom platform.

This is always available, but if the custom feature isn’t turned on this always returns false.

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pub fn eval(&self, platform: &Platform) -> bool

Evaluates this triple against the given platform.

This simply compares self’s string representation against the Triple the platform is based on, ignoring target features and flags.

Trait Implementations§

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impl Clone for Triple

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fn clone(&self) -> Triple

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

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

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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 FromStr for Triple

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type Err = TripleParseError

The associated error which can be returned from parsing.
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fn from_str(triple_str: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type. Read more
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impl Hash for Triple

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl Ord for Triple

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fn cmp(&self, other: &Triple) -> Ordering

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized,

Restrict a value to a certain interval. Read more
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impl PartialEq for Triple

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fn eq(&self, other: &Triple) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl PartialOrd for Triple

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fn partial_cmp(&self, other: &Triple) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl Eq for Triple

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impl StructuralPartialEq for Triple

Auto Trait Implementations§

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impl Freeze for Triple

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impl RefUnwindSafe for Triple

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impl Send for Triple

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impl Sync for Triple

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impl Unpin for Triple

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impl UnwindSafe for Triple

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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. 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.