Trait FromSpgValue 

pub trait FromSpgValue: Sized {
    // Required method
    fn from_spg_value(v: &Value) -> Result<Self, &'static str>;
}

v7.3.0 — per-column decoder used by spg_row!. Surface covers every numeric / text / bytes / bool variant in Value, plus Option<T> for nullable columns.

Required Methods

fn from_spg_value(v: &Value) -> Result<Self, &'static str>

Decode one cell into Self. The returned &'static str is a short diagnostic for type mismatches (e.g. "expected integer, got TEXT"); callers wrap it into their own error type.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl FromSpgValue for String

fn from_spg_value(v: &Value) -> Result<Self, &'static str>

impl FromSpgValue for Vec<f32>

fn from_spg_value(v: &Value) -> Result<Self, &'static str>

impl FromSpgValue for bool

fn from_spg_value(v: &Value) -> Result<Self, &'static str>

impl FromSpgValue for f32

fn from_spg_value(v: &Value) -> Result<Self, &'static str>

impl FromSpgValue for f64

fn from_spg_value(v: &Value) -> Result<Self, &'static str>

impl FromSpgValue for i16

fn from_spg_value(v: &Value) -> Result<Self, &'static str>

impl FromSpgValue for i32

fn from_spg_value(v: &Value) -> Result<Self, &'static str>

impl FromSpgValue for i64

fn from_spg_value(v: &Value) -> Result<Self, &'static str>

impl<T: FromSpgValue> FromSpgValue for Option<T>

fn from_spg_value(v: &Value) -> Result<Self, &'static str>

Implementors