qraft-core 0.1.2

Core type system, query model, decoding, and SQL lowering primitives for qraft.
Documentation 
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use crate::{
    TypeMeta, Untyped,
    expression::{Column, Expression},
    lower::LowerCtx,
};

#[derive(Debug, Clone, Copy)]
pub struct As<T> {
    pub table: &'static str,
    pub inner: T,
}

#[qraft_expression_macro::as_expression]
impl<M, T: TypeMeta> Expression for As<Column<M, T>> {
    type Type = T;

    fn lower(&self, ctx: &mut LowerCtx) -> usize {
        ctx.lower_column(Some(self.table), self.inner.name)
    }
}

#[qraft_expression_macro::as_expression]
impl Expression for As<&'static str> {
    type Type = Untyped;

    fn lower(&self, ctx: &mut LowerCtx) -> usize {
        ctx.lower_column(Some(self.table), self.inner)
    }
}