Enum Operand

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pub enum Operand {
    Const(String),
    Map(Vec<(String, String)>),
    Set(Vec<String>),
    List(Vec<String>),
    Tuple(Vec<Operand>),
    Column(Identifier),
    Func(String),
    Param(String),
    Null,
}
Expand description

An object that can be on either side of an Operator

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Const(String)

A constant

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Map(Vec<(String, String)>)

a map displays as { String:String, String:String, ... }

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Set(Vec<String>)

a set of values. Displays as ( String, String, ...)

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List(Vec<String>)

a list of values. Displays as [String, String, ...]

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Tuple(Vec<Operand>)

a tuple of values. Displays as { Operand, Operand, ... }

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Column(Identifier)

A column name

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Func(String)

A function call e.g. foo(bar)

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Param(String)

A parameter. The string will either be ‘?’ or ‘:name’

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Null

the NULL value.

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impl Operand

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pub fn unescape(value: &str) -> String

unescapes a CQL string Specifically converts '' to ' and removes the leading and trailing delimiters. For all other strings this is method returns the argument. Valid delimiters are ' and $$

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pub fn escape(txt: &str) -> Operand

creates an Operand::Const from an unquoted string. if the string contains a ' it will be quoted by the $$ pattern. if it contains $$ and ' it will be quoted by the ' pattern and all existing ' will be replaced with '' (two single quotes).

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impl Clone for Operand

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fn clone(&self) -> Operand

Returns a duplicate 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 Operand

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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 Display for Operand

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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 From<&BigDecimal> for Operand

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fn from(b: &BigDecimal) -> Self

Converts to this type from the input type.
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impl From<&BigInt> for Operand

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fn from(b: &BigInt) -> Self

Converts to this type from the input type.
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impl From<&Bytes> for Operand

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fn from(b: &Bytes) -> Self

Converts to this type from the input type.
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impl From<&IpAddr> for Operand

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fn from(addr: &IpAddr) -> Self

Converts to this type from the input type.
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impl From<&Uuid> for Operand

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fn from(uuid: &Uuid) -> Self

Converts to this type from the input type.
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impl From<&bool> for Operand

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fn from(b: &bool) -> Self

Converts to this type from the input type.
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impl From<&f32> for Operand

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fn from(i: &f32) -> Self

Converts to this type from the input type.
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impl From<&f64> for Operand

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fn from(i: &f64) -> Self

Converts to this type from the input type.
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impl From<&i128> for Operand

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fn from(i: &i128) -> Self

Converts to this type from the input type.
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impl From<&i16> for Operand

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fn from(i: &i16) -> Self

Converts to this type from the input type.
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impl From<&i32> for Operand

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fn from(i: &i32) -> Self

Converts to this type from the input type.
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impl From<&i64> for Operand

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fn from(i: &i64) -> Self

Converts to this type from the input type.
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impl From<&i8> for Operand

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fn from(i: &i8) -> Self

Converts to this type from the input type.
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impl From<&str> for Operand

this is NOT the same as Operand::Const(string) This conversion encloses the value in single quotes.

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fn from(txt: &str) -> Self

Converts to this type from the input type.
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impl From<&u128> for Operand

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fn from(i: &u128) -> Self

Converts to this type from the input type.
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impl From<&u16> for Operand

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fn from(i: &u16) -> Self

Converts to this type from the input type.
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impl From<&u32> for Operand

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fn from(i: &u32) -> Self

Converts to this type from the input type.
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impl From<&u64> for Operand

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fn from(i: &u64) -> Self

Converts to this type from the input type.
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impl From<&u8> for Operand

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fn from(i: &u8) -> Self

Converts to this type from the input type.
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impl Ord for Operand

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fn cmp(&self, other: &Operand) -> 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 Operand

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fn eq(&self, other: &Operand) -> 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 Operand

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fn partial_cmp(&self, other: &Operand) -> 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 Operand

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impl StructuralPartialEq for Operand

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> 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<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> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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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> ToString for T
where T: Display + ?Sized,

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fn to_string(&self) -> String

Converts the given value to a String. 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.