Enum ConditionTree

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pub enum ConditionTree<'a> {
    And(Vec<Expression<'a>>),
    Or(Vec<Expression<'a>>),
    Not(Box<Expression<'a>>),
    Single(Box<Expression<'a>>),
    NoCondition,
    NegativeCondition,
    Exists(Box<Table<'a>>),
}
Expand description

Tree structures and leaves for condition building.

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And(Vec<Expression<'a>>)

(left_expression AND right_expression)

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Or(Vec<Expression<'a>>)

(left_expression OR right_expression)

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Not(Box<Expression<'a>>)

(NOT expression)

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Single(Box<Expression<'a>>)

A single expression leaf

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NoCondition

A leaf that does nothing to the condition, 1=1

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NegativeCondition

A leaf that cancels the condition, 1=0

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Exists(Box<Table<'a>>)

Exists condition

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impl<'a> ConditionTree<'a>

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pub fn and<E>(self, other: E) -> ConditionTree<'a>
where E: Into<Expression<'a>>,

An AND statement, is true when both sides are true.

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pub fn or<E>(self, other: E) -> ConditionTree<'a>
where E: Into<Expression<'a>>,

An OR statement, is true when one side is true.

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pub fn not<E>(left: E) -> ConditionTree<'a>
where E: Into<Expression<'a>>,

A NOT statement, is true when the expression is false.

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pub fn single<E>(left: E) -> ConditionTree<'a>
where E: Into<Expression<'a>>,

A single leaf, is true when the expression is true.

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pub fn exists<E>(select: E) -> ConditionTree<'a>
where E: Into<Table<'a>>,

True if a nested table has any values.

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pub fn invert_if(self, invert: bool) -> ConditionTree<'a>

Inverts the entire condition tree if condition is met.

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impl<'a> Clone for ConditionTree<'a>

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fn clone(&self) -> ConditionTree<'a>

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<'a> Debug for ConditionTree<'a>

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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<'a> Default for ConditionTree<'a>

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fn default() -> ConditionTree<'a>

Returns the “default value” for a type. Read more
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impl<'a> From<Compare<'a>> for ConditionTree<'a>

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fn from(cmp: Compare<'a>) -> Self

Converts to this type from the input type.
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impl<'a> From<ConditionTree<'a>> for Expression<'a>

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fn from(ct: ConditionTree<'a>) -> Self

Converts to this type from the input type.
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impl<'a> From<Select<'a>> for ConditionTree<'a>

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fn from(sel: Select<'a>) -> Self

Converts to this type from the input type.
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impl<'a> PartialEq for ConditionTree<'a>

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fn eq(&self, other: &ConditionTree<'a>) -> 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<'a> StructuralPartialEq for ConditionTree<'a>

Auto Trait Implementations§

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impl<'a> Freeze for ConditionTree<'a>

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impl<'a> RefUnwindSafe for ConditionTree<'a>

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impl<'a> Send for ConditionTree<'a>

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impl<'a> Sync for ConditionTree<'a>

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impl<'a> Unpin for ConditionTree<'a>

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impl<'a> UnwindSafe for ConditionTree<'a>

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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, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<'a, T> Conjunctive<'a> for T
where T: Into<Expression<'a>>,

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fn and<E>(self, other: E) -> ConditionTree<'a>
where E: Into<Expression<'a>>,

Builds an AND condition having self as the left leaf and other as the right.
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fn or<E>(self, other: E) -> ConditionTree<'a>
where E: Into<Expression<'a>>,

Builds an OR condition having self as the left leaf and other as the right.
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fn not(self) -> ConditionTree<'a>

Builds a NOT condition having self as the condition.
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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.