Enum ConfigValue

pub enum ConfigValue<'a> {
    StrRef(&'a str),
    Str(String),
    Int(i64),
    Float(f64),
    Bool(bool),
    Rand(RandValue),
}

Config value, ConfigSource use this value to store config properties.

Placeholder expression

Placeholder expression use normalized string representation of crate::ConfigKey, with extra brackets. For example: ${cfg.k1}.

Placeholder expression is powerful in realworld application, it has following benifits:

Placeholder can reduce duplicated configs, use one key config to affect multiple keys.

• app.name = cfg
• app.version = 1.0.0
• app.desc = Application ${app.name}, version ${app.version}

Placeholder can generate configs, we can use placeholder to generate random values.

• app.id = ${random.u64}
• app.instance = ${app.name}-${app.id}

Variants

StrRef(&'a str)

String reference, supports placeholder expression.

Str(String)

String, supports placeholder expression.

Int(i64)

Integer.

Float(f64)

Float value.

Bool(bool)

Bool value.

Rand(RandValue)

Random value.

Trait Implementations

impl<'a> Debug for ConfigValue<'a>

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

Formats the value using the given formatter.

impl<'a> From<&'a str> for ConfigValue<'a>

fn from(c: &'a str) -> Self

Converts to this type from the input type.

impl From<String> for ConfigValue<'_>

fn from(v: String) -> Self

Converts to this type from the input type.

impl From<bool> for ConfigValue<'_>

fn from(v: bool) -> Self

Converts to this type from the input type.

impl From<f32> for ConfigValue<'_>

fn from(c: f32) -> Self

Converts to this type from the input type.

impl From<f64> for ConfigValue<'_>

fn from(c: f64) -> Self

Converts to this type from the input type.

impl From<i128> for ConfigValue<'_>

fn from(c: i128) -> Self

Converts to this type from the input type.

impl From<i16> for ConfigValue<'_>

fn from(c: i16) -> Self

Converts to this type from the input type.

impl From<i32> for ConfigValue<'_>

fn from(c: i32) -> Self

Converts to this type from the input type.

impl From<i64> for ConfigValue<'_>

fn from(c: i64) -> Self

Converts to this type from the input type.

impl From<i8> for ConfigValue<'_>

fn from(c: i8) -> Self

Converts to this type from the input type.

impl From<isize> for ConfigValue<'_>

fn from(c: isize) -> Self

Converts to this type from the input type.

impl From<u128> for ConfigValue<'_>

fn from(c: u128) -> Self

Converts to this type from the input type.

impl From<u16> for ConfigValue<'_>

fn from(c: u16) -> Self

Converts to this type from the input type.

impl From<u32> for ConfigValue<'_>

fn from(c: u32) -> Self

Converts to this type from the input type.

impl From<u64> for ConfigValue<'_>

fn from(c: u64) -> Self

Converts to this type from the input type.

impl From<u8> for ConfigValue<'_>

fn from(c: u8) -> Self

Converts to this type from the input type.

impl From<usize> for ConfigValue<'_>

fn from(c: usize) -> Self

Converts to this type from the input type.