tank_core/expression/
unary_op.rs

1use crate::{
2    DynQuery, Expression, ExpressionVisitor, OpPrecedence,
3    writer::{Context, SqlWriter},
4};
5
6#[derive(Clone, Copy, PartialEq, Debug)]
7pub enum UnaryOpType {
8    Negative,
9    Not,
10}
11impl OpPrecedence for UnaryOpType {
12    fn precedence(&self, writer: &dyn SqlWriter) -> i32 {
13        writer.expression_unary_op_precedence(self)
14    }
15}
16
17#[derive(Debug)]
18pub struct UnaryOp<V: Expression> {
19    pub op: UnaryOpType,
20    pub arg: V,
21}
22
23impl<E: Expression> OpPrecedence for UnaryOp<E> {
24    fn precedence(&self, writer: &dyn SqlWriter) -> i32 {
25        writer.expression_unary_op_precedence(&self.op)
26    }
27}
28
29impl<E: Expression> Expression for UnaryOp<E> {
30    fn write_query(&self, writer: &dyn SqlWriter, context: &mut Context, out: &mut DynQuery) {
31        writer.write_expression_unary_op(
32            context,
33            out,
34            &UnaryOp {
35                op: self.op,
36                arg: &self.arg,
37            },
38        )
39    }
40
41    fn accept_visitor(
42        &self,
43        matcher: &mut dyn ExpressionVisitor,
44        writer: &dyn SqlWriter,
45        context: &mut Context,
46        out: &mut DynQuery,
47    ) -> bool {
48        matcher.visit_unary_op(
49            writer,
50            context,
51            out,
52            &UnaryOp {
53                op: self.op,
54                arg: &self.arg,
55            },
56        )
57    }
58}
tank_core/expression/unary_op.rs

tank_core/expression/
unary_op.rs
