kosame_repr 0.3.0

Macro-based Rust ORM focused on developer ergonomics
Documentation 
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use std::fmt::Write;

use crate::{Ident, expr::Expr};

pub struct Set<'a> {
    items: &'a [SetItem<'a>],
}

impl<'a> Set<'a> {
    #[inline]
    #[must_use]
    pub const fn new(items: &'a [SetItem<'a>]) -> Self {
        Self { items }
    }

    #[inline]
    #[must_use]
    pub const fn items(&self) -> &'a [SetItem<'a>] {
        self.items
    }
}

impl kosame_sql::FmtSql for Set<'_> {
    fn fmt_sql<D>(&self, formatter: &mut kosame_sql::Formatter<D>) -> kosame_sql::Result
    where
        D: kosame_sql::Dialect,
    {
        formatter.write_str(" set ")?;
        kosame_sql::Punctuated::new(self.items, ",").fmt_sql(formatter)?;
        Ok(())
    }
}

pub enum SetItem<'a> {
    Default { column: &'a str },
    Expr { column: &'a str, expr: Expr<'a> },
}

impl kosame_sql::FmtSql for SetItem<'_> {
    fn fmt_sql<D>(&self, formatter: &mut kosame_sql::Formatter<D>) -> kosame_sql::Result
    where
        D: kosame_sql::Dialect,
    {
        match self {
            Self::Default { column } => {
                Ident::new(column).fmt_sql(formatter)?;
                formatter.write_str(" = default")?;
            }
            Self::Expr { column, expr } => {
                Ident::new(column).fmt_sql(formatter)?;
                formatter.write_str(" = ")?;
                expr.fmt_sql(formatter)?;
            }
        }
        Ok(())
    }
}