Enum assembly_fdb::core::ValueType

pub enum ValueType {
    Nothing,
    Integer,
    Float,
    Text,
    Boolean,
    BigInt,
    VarChar,
}

Value datatypes used in the database

Variants

Nothing

The NULL value

Integer

A 32-bit signed integer

Float

A 32-bit IEEE floating point number

Text

A long string

Boolean

A boolean

BigInt

A 64 bit integer

VarChar

An (XML?) string

Implementations

impl ValueType

pub fn static_name(&self) -> &'static str

Get a static name for the type

pub fn to_sqlite_type(self) -> &'static str

Get the canonical SQLite name of this data type

pub fn from_sqlite_type(decl_type: &str) -> Option<ValueType>

Take an SQLite column declaration type and guess the ValueType

This function does a proper round-trip with to_sqlite_type

use assembly_fdb_core::value::ValueType;

fn round_trip(v: ValueType) -> Option<ValueType> {
    ValueType::from_sqlite_type(v.to_sqlite_type())
}

// Check whether the round-trip works
assert_eq!(round_trip(ValueType::Nothing), Some(ValueType::Nothing));
assert_eq!(round_trip(ValueType::Integer), Some(ValueType::Integer));
assert_eq!(round_trip(ValueType::Float), Some(ValueType::Float));
assert_eq!(round_trip(ValueType::Text), Some(ValueType::Text));
assert_eq!(round_trip(ValueType::Boolean), Some(ValueType::Boolean));
assert_eq!(round_trip(ValueType::BigInt), Some(ValueType::BigInt));
assert_eq!(round_trip(ValueType::VarChar), Some(ValueType::VarChar));

// Check whether lcdr's names work
assert_eq!(ValueType::from_sqlite_type("none"), Some(ValueType::Nothing));
assert_eq!(ValueType::from_sqlite_type("int32"), Some(ValueType::Integer));
assert_eq!(ValueType::from_sqlite_type("real"), Some(ValueType::Float));
assert_eq!(ValueType::from_sqlite_type("text_4"), Some(ValueType::Text));
assert_eq!(ValueType::from_sqlite_type("int_bool"), Some(ValueType::Boolean));
assert_eq!(ValueType::from_sqlite_type("int64"), Some(ValueType::BigInt));
assert_eq!(ValueType::from_sqlite_type("text_8"), Some(ValueType::VarChar));

Trait Implementations

impl Clone for ValueType

fn clone(&self) -> ValueType

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ValueType

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

Formats the value using the given formatter.

impl Display for ValueType

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

Formats the value using the given formatter.

impl<T> From<&Value<T>> for ValueType

where T: Context,

fn from(val: &Value<T>) -> ValueType

Converts to this type from the input type.

impl PartialEq for ValueType

fn eq(&self, other: &ValueType) -> 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 Serialize for ValueType

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl TryFrom<u32> for ValueType

type Error = UnknownValueType

The type returned in the event of a conversion error.

fn try_from( value_type: u32, ) -> Result<ValueType, <ValueType as TryFrom<u32>>::Error>

Performs the conversion.

impl Copy for ValueType

impl Eq for ValueType

impl StructuralPartialEq for ValueType