tank_core/expression/
expression.rs

1use crate::{
2    OpPrecedence, Value,
3    writer::{Context, SqlWriter},
4};
5use std::fmt::Debug;
6
7pub trait Expression: OpPrecedence + Send + Sync + Debug {
8    fn write_query(&self, writer: &dyn SqlWriter, context: &mut Context, buff: &mut String);
9    fn is_ordered(&self) -> bool {
10        false
11    }
12}
13
14impl<T: Expression> Expression for &T {
15    fn write_query(&self, writer: &dyn SqlWriter, context: &mut Context, buff: &mut String) {
16        (*self).write_query(writer, context, buff);
17    }
18    fn is_ordered(&self) -> bool {
19        (*self).is_ordered()
20    }
21}
22
23impl Expression for &dyn Expression {
24    fn write_query(&self, writer: &dyn SqlWriter, context: &mut Context, buff: &mut String) {
25        (*self).write_query(writer, context, buff);
26    }
27    fn is_ordered(&self) -> bool {
28        (*self).is_ordered()
29    }
30}
31
32impl Expression for () {
33    fn write_query(&self, _writer: &dyn SqlWriter, _context: &mut Context, _buff: &mut String) {}
34}
35
36impl Expression for bool {
37    fn write_query(&self, writer: &dyn SqlWriter, context: &mut Context, buff: &mut String) {
38        writer.write_value_bool(context, buff, *self);
39    }
40}
41
42impl<'a, T: Expression> From<&'a T> for &'a dyn Expression {
43    fn from(value: &'a T) -> Self {
44        value as &'a dyn Expression
45    }
46}
47
48impl Expression for Value {
49    fn write_query(&self, writer: &dyn SqlWriter, context: &mut Context, buff: &mut String) {
50        writer.write_value(context, buff, self);
51    }
52}
tank_core/expression/expression.rs

tank_core/expression/
expression.rs
