kosame_repr 0.3.0

Macro-based Rust ORM focused on developer ergonomics
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73

use std::{fmt::Write, ops::Deref};

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

pub struct Field<'a> {
    expr: Expr<'a>,
    alias: Option<Ident<'a>>,
}

impl<'a> Field<'a> {
    #[inline]
    #[must_use]
    pub const fn new(expr: Expr<'a>, alias: Option<&'a str>) -> Self {
        Self {
            expr,
            alias: Ident::from_option(alias),
        }
    }

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

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

impl kosame_sql::FmtSql for Field<'_> {
    #[inline]
    fn fmt_sql<D>(&self, formatter: &mut kosame_sql::Formatter<D>) -> kosame_sql::Result
    where
        D: kosame_sql::Dialect,
    {
        self.expr.fmt_sql(formatter)?;
        if let Some(alias) = &self.alias {
            formatter.write_str(" as ")?;
            alias.fmt_sql(formatter)?;
        }
        Ok(())
    }
}

pub struct Fields<'a>(&'a [Field<'a>]);

impl<'a> Fields<'a> {
    #[inline]
    #[must_use]
    pub const fn new(fields: &'a [Field<'a>]) -> Self {
        Self(fields)
    }
}

impl<'a> Deref for Fields<'a> {
    type Target = &'a [Field<'a>];

    fn deref(&self) -> &Self::Target {
        &self.0
    }
}

impl kosame_sql::FmtSql for Fields<'_> {
    fn fmt_sql<D>(&self, formatter: &mut kosame_sql::Formatter<D>) -> kosame_sql::Result
    where
        D: kosame_sql::Dialect,
    {
        kosame_sql::Punctuated::new(self.0, ",").fmt_sql(formatter)
    }
}