Enum rustdb::value::Value

pub enum Value {
    None,
    Binary(Rc<Vec<u8>>),
    String(Rc<String>),
    Int(i64),
    Float(f64),
    Bool(bool),
    For(Rc<RefCell<ForState>>),
    ForSort(Rc<RefCell<ForSortState>>),
}

Simple value ( Binary, String, Int, Float, Bool ).

Binary and String values are allocated 16 bytes. If the value is more than 15 bytes, the first 7 bytes are stored inline, and the rest are coded.

Variants

None

Binary(Rc<Vec<u8>>)

Tuple Fields

0: Rc<Vec<u8>>

String(Rc<String>)

Tuple Fields

0: Rc<String>

Int(i64)

Tuple Fields

0: i64

Float(f64)

Tuple Fields

0: f64

Bool(bool)

Tuple Fields

0: bool

For(Rc<RefCell<ForState>>)

Tuple Fields

0: Rc<RefCell<ForState>>

ForSort(Rc<RefCell<ForSortState>>)

Tuple Fields

0: Rc<RefCell<ForSortState>>

Implementations

impl Value

pub fn default(t: DataType) -> Value

Get the default Value for a DataType.

pub fn load(db: &DB, typ: DataType, data: &[u8], off: usize) -> (Value, u64)

Get a Value from byte data.

pub fn save(&self, typ: DataType, data: &mut [u8], off: usize, code: u64)

Save a Value to byte data.

pub fn str(&self) -> Rc<String>

Convert a Value to a String.

pub fn append(&mut self, val: &Value)

Append a String.

Trait Implementations

impl CExp<Value> for Call

fn eval(&self, e: &mut EvalEnv<'_>, d: &[u8]) -> Value

impl CExp<Value> for Concat

fn eval(&self, e: &mut EvalEnv<'_>, d: &[u8]) -> Value

impl CExp<Value> for ColumnString

fn eval(&self, ee: &mut EvalEnv<'_>, data: &[u8]) -> Value

impl CExp<Value> for ColumnBinary

fn eval(&self, ee: &mut EvalEnv<'_>, data: &[u8]) -> Value

impl CExp<Value> for Local

fn eval(&self, e: &mut EvalEnv<'_>, _d: &[u8]) -> Value

impl CExp<Value> for IntToVal

fn eval(&self, e: &mut EvalEnv<'_>, d: &[u8]) -> Value

impl CExp<Value> for FloatToVal

fn eval(&self, e: &mut EvalEnv<'_>, d: &[u8]) -> Value

impl CExp<Value> for BoolToVal

fn eval(&self, e: &mut EvalEnv<'_>, d: &[u8]) -> Value

impl Clone for Value

fn clone(&self) -> Value

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Ord for Value

Value comparison.

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

This method returns an Ordering between self and other.

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

Compares and returns the maximum of two values.

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

Compares and returns the minimum of two values.

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

Restrict a value to a certain interval.

impl PartialEq<Value> for Value

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl PartialOrd<Value> for Value

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

This method tests less than (for self and other) and is used by the < operator.

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

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

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

This method tests greater than (for self and other) and is used by the > operator.

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

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

impl Eq for Value