Struct IfElseCfg

pub struct IfElseCfg<T, U, const CONDITION: bool>(/* private fields */)
where
    (*const T, *const U): CfgControl<CONDITION>;

These types are for situations where a feature would change what type is in use. This is better than conditional compilation as a single compilation run can type check all combinations of features.

Usage: type MyType = IfElseCfg<TrueType, FalseType, ConditionForTrueType>

If coming from C and you are used to the pattern of

struct Foo { #if SOME_FLAG T1 field_t1; #else T2 field_t2; #endif }

Instead write:

struct Foo { field : IfElseCfg<T1, T2, SOME_FLAG>, }

Then, rather than

Foo myFoo = …; #if SOME_FLAG bar(&myFoo.field_t1); #else baz(&myFoo.field_t2); #endif

Do

let myFoo : Foo = …; if SOME_FLAG { bar(myFoo.get_true_ref()) } else { baz(myFoo.get_false_ref()) }

Or more cleanly:

let myFoo : Foo = …; myFoo.mapRef(bar, baz);

Implementations

impl<T, U, const COND: bool> IfElseCfg<T, U, COND>

where (*const T, *const U): CfgControl<COND>,

pub fn unwrap(self) -> <(*const T, *const U) as CfgControl<CONDITION>>::Out

where <(*const T, *const U) as CfgControl<COND>>::Out: Sized,

pub fn unwrap_ref( &self, ) -> &<(*const T, *const U) as CfgControl<CONDITION>>::Out

pub fn unwrap_mut( &mut self, ) -> &mut <(*const T, *const U) as CfgControl<CONDITION>>::Out

impl<T, U> IfElseCfg<T, U, true>

pub const fn new_true(value: T) -> Self

pub const fn new_false(_value: U) -> Self

pub const fn new(value_true: T, _value_false: U) -> Self

where T: Copy, U: Copy,

pub fn get_match(&self) -> CfgMatch<'_, T, U>

pub fn get_match_mut(&mut self) -> CfgMatchMut<'_, T, U>

pub fn map_ref<R, FT, FF>(&self, true_f: FT, _false_f: FF) -> R

where FT: FnOnce(&T) -> R, FF: FnOnce(&U) -> R,

pub fn map_mut<R, FT, FF>(&mut self, true_f: FT, _false_f: FF) -> R

where FT: FnOnce(&mut T) -> R, FF: FnOnce(&mut U) -> R,

pub const fn get_true_ref(&self) -> &T

pub fn get_true_mut(&mut self) -> &mut T

pub fn get_false_ref(&self) -> &U

pub fn get_false_mut(&mut self) -> &mut U

pub fn consume_true(self) -> T

pub fn consume_false(self) -> U

pub fn consume(self) -> CfgConsumed<T, U>

pub fn cfg_into<X>(self) -> X

where T: Into<X>, U: Into<X>,

pub fn cfg_from<X: Into<T> + Into<U>>(x: X) -> Self

impl<T, U> IfElseCfg<T, U, false>

pub const fn new_true(_value: T) -> Self

pub const fn new_false(value: U) -> Self

pub const fn new(_value_true: T, value_false: U) -> Self

where T: Copy, U: Copy,

pub fn get_match(&self) -> CfgMatch<'_, T, U>

pub fn get_match_mut(&mut self) -> CfgMatchMut<'_, T, U>

pub fn map_ref<R, FT, FF>(&self, _true_f: FT, false_f: FF) -> R

where FT: FnOnce(&T) -> R, FF: FnOnce(&U) -> R,

pub fn map_mut<R, FT, FF>(&mut self, _true_f: FT, false_f: FF) -> R

where FT: FnOnce(&mut T) -> R, FF: FnOnce(&mut U) -> R,

pub fn get_true_ref(&self) -> &T

pub fn get_true_mut(&mut self) -> &mut T

pub const fn get_false_ref(&self) -> &U

pub fn get_false_mut(&mut self) -> &mut U

pub fn consume_true(self) -> T

pub fn consume_false(self) -> U

pub fn consume(self) -> CfgConsumed<T, U>

pub fn cfg_into<X>(self) -> X

where T: Into<X>, U: Into<X>,

pub fn cfg_from<X: Into<T> + Into<U>>(x: X) -> Self

Trait Implementations

impl<T: Clone, U: Clone, const COND: bool> Clone for IfElseCfg<T, U, COND>

where (*const T, *const U): CfgControl<COND>, <(*const T, *const U) as CfgControl<CONDITION>>::Out: Clone,

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: Debug, U: Debug> Debug for IfElseCfg<T, U, false>

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

Formats the value using the given formatter.

impl<T: Debug, U: Debug> Debug for IfElseCfg<T, U, true>

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

Formats the value using the given formatter.

impl<T: Default, U: Default> Default for IfElseCfg<T, U, false>

fn default() -> Self

Returns the “default value” for a type.

impl<T: Default, U: Default> Default for IfElseCfg<T, U, true>

fn default() -> Self

Returns the “default value” for a type.

impl<T: Display, U: Display> Display for IfElseCfg<T, U, false>

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

Formats the value using the given formatter.

impl<T: Display, U: Display> Display for IfElseCfg<T, U, true>

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

Formats the value using the given formatter.

impl<T: Hash, U: Hash> Hash for IfElseCfg<T, U, false>

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

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<T: Hash, U: Hash> Hash for IfElseCfg<T, U, true>

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

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<T: LowerHex, U: LowerHex> LowerHex for IfElseCfg<T, U, false>

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

Formats the value using the given formatter.

impl<T: LowerHex, U: LowerHex> LowerHex for IfElseCfg<T, U, true>

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

Formats the value using the given formatter.

impl<T: Ord, U: Ord> Ord for IfElseCfg<T, U, false>

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

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl<T: Ord, U: Ord> Ord for IfElseCfg<T, U, true>

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

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl<T: PartialEq, U: PartialEq> PartialEq for IfElseCfg<T, U, false>

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

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

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

impl<T: PartialEq, U: PartialEq> PartialEq for IfElseCfg<T, U, true>

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

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

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

impl<T: PartialOrd, U: PartialOrd> PartialOrd for IfElseCfg<T, U, false>

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

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

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

impl<T: PartialOrd, U: PartialOrd> PartialOrd for IfElseCfg<T, U, true>

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

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

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

impl<T: UpperHex, U: UpperHex> UpperHex for IfElseCfg<T, U, false>

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

Formats the value using the given formatter.

impl<T: UpperHex, U: UpperHex> UpperHex for IfElseCfg<T, U, true>

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

Formats the value using the given formatter.

impl<T: Copy, U: Copy, const COND: bool> Copy for IfElseCfg<T, U, COND>

where (*const T, *const U): CfgControl<COND>, <(*const T, *const U) as CfgControl<CONDITION>>::Out: Copy,

impl<T: Eq, U: Eq> Eq for IfElseCfg<T, U, false>

impl<T: Eq, U: Eq> Eq for IfElseCfg<T, U, true>