Trait FromSpgRow 

pub trait FromSpgRow: Sized {
    // Required method
    fn from_spg_row(row: &[Value]) -> Result<Self, EngineError>;
}

v6.10.3 — trait that maps a row’s columns onto a user struct’s fields. v7.3.0 ships the spg_row! declarative macro that generates impl FromSpgRow for YourStruct from a struct definition (no proc-macro, no syn/quote/ proc-macro2 deps — the workspace’s “0 external deps” policy holds).

Implementors map a row’s columns onto a user struct’s fields. Errors surface as EngineError::Unsupported so the caller’s error type stays uniform.

Required Methods

fn from_spg_row(row: &[Value]) -> Result<Self, EngineError>

Decode one query result row into Self. Called once per row by Database::query_typed. The slice length equals the number of columns in the SELECT projection.

Dyn Compatibility

This trait is not dyn compatible.

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

Implementors