Enum Operand 

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,
}

An object that can be on either side of an Operator

Variants

Const(String)

A constant

Map(Vec<(String, String)>)

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

Set(Vec<String>)

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

List(Vec<String>)

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

Tuple(Vec<Operand>)

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

Column(Identifier)

A column name

Func(String)

A function call e.g. foo(bar)

Param(String)

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

Null

the NULL value.

Implementations

impl Operand

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 $$

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).

Trait Implementations

impl Clone for Operand

fn clone(&self) -> Operand

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Operand

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

Formats the value using the given formatter.

impl Display for Operand

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

Formats the value using the given formatter.

impl From<&BigDecimal> for Operand

fn from(b: &BigDecimal) -> Self

Converts to this type from the input type.

impl From<&BigInt> for Operand

fn from(b: &BigInt) -> Self

Converts to this type from the input type.

impl From<&Bytes> for Operand

fn from(b: &Bytes) -> Self

Converts to this type from the input type.

impl From<&IpAddr> for Operand

fn from(addr: &IpAddr) -> Self

Converts to this type from the input type.

impl From<&Uuid> for Operand

fn from(uuid: &Uuid) -> Self

Converts to this type from the input type.

impl From<&bool> for Operand

fn from(b: &bool) -> Self

Converts to this type from the input type.

impl From<&f32> for Operand

fn from(i: &f32) -> Self

Converts to this type from the input type.

impl From<&f64> for Operand

fn from(i: &f64) -> Self

Converts to this type from the input type.

impl From<&i128> for Operand

fn from(i: &i128) -> Self

Converts to this type from the input type.

impl From<&i16> for Operand

fn from(i: &i16) -> Self

Converts to this type from the input type.

impl From<&i32> for Operand

fn from(i: &i32) -> Self

Converts to this type from the input type.

impl From<&i64> for Operand

fn from(i: &i64) -> Self

Converts to this type from the input type.

impl From<&i8> for Operand

fn from(i: &i8) -> Self

Converts to this type from the input type.

impl From<&str> for Operand

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

fn from(txt: &str) -> Self

Converts to this type from the input type.

impl From<&u128> for Operand

fn from(i: &u128) -> Self

Converts to this type from the input type.

impl From<&u16> for Operand

fn from(i: &u16) -> Self

Converts to this type from the input type.

impl From<&u32> for Operand

fn from(i: &u32) -> Self

Converts to this type from the input type.

impl From<&u64> for Operand

fn from(i: &u64) -> Self

Converts to this type from the input type.

impl From<&u8> for Operand

fn from(i: &u8) -> Self

Converts to this type from the input type.

impl Ord for Operand

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

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

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

impl StructuralPartialEq for Operand