toasty_sql/serializer/
params.rs

1use super::{Formatter, ToSql};
2
3use std::fmt;
4use toasty_core::driver::SqlPlaceholder;
5
6/// A positional bind-parameter placeholder.
7///
8/// The inner `usize` is the 1-based parameter index. The serializer renders
9/// it in the target dialect's format (`$1`, `?1`, or `?`).
10///
11/// # Example
12///
13/// ```
14/// use toasty_sql::serializer::Placeholder;
15///
16/// let p = Placeholder(3);
17/// assert_eq!(p.0, 3);
18/// ```
19pub struct Placeholder(pub usize);
20
21impl ToSql for Placeholder {
22    fn to_sql(self, f: &mut Formatter<'_>) {
23        let placeholder = super::dialect::sql_placeholder(f.serializer.dialect);
24        write_sql_placeholder(&mut f.dst, placeholder, self.0).unwrap();
25    }
26}
27
28fn write_sql_placeholder(
29    dst: &mut impl fmt::Write,
30    placeholder: SqlPlaceholder,
31    index: usize,
32) -> fmt::Result {
33    match placeholder {
34        SqlPlaceholder::QuestionMark => dst.write_str("?"),
35        SqlPlaceholder::NumberedQuestionMark => write!(dst, "?{index}"),
36        SqlPlaceholder::DollarNumber => write!(dst, "${index}"),
37    }
38}
toasty_sql/serializer/params.rs

toasty_sql/serializer/
params.rs
