gluesql_core/ast_builder/
assignment.rs

1use {
2    super::ExprNode,
3    crate::{
4        ast::{Assignment, Expr},
5        parse_sql::parse_assignment,
6        result::{Error, Result},
7        translate::translate_assignment,
8    },
9};
10
11#[derive(Clone, Debug)]
12pub enum AssignmentNode<'a> {
13    Expr(String, ExprNode<'a>),
14    Text(String),
15}
16
17impl<'a> From<&str> for AssignmentNode<'a> {
18    fn from(expr: &str) -> Self {
19        Self::Text(expr.to_owned())
20    }
21}
22
23impl<'a> TryFrom<AssignmentNode<'a>> for Assignment {
24    type Error = Error;
25
26    fn try_from(node: AssignmentNode<'a>) -> Result<Self> {
27        match node {
28            AssignmentNode::Text(expr) => {
29                let expr = parse_assignment(expr)
30                    .and_then(|assignment| translate_assignment(&assignment))?;
31                Ok(expr)
32            }
33            AssignmentNode::Expr(col, expr_node) => {
34                let value = Expr::try_from(expr_node)?;
35                let id = col;
36                Ok(Assignment { id, value })
37            }
38        }
39    }
40}
41
42#[cfg(test)]
43mod tests {
44    use {
45        crate::{
46            ast_builder::AssignmentNode, parse_sql::parse_assignment,
47            translate::translate_assignment,
48        },
49        pretty_assertions::assert_eq,
50    };
51
52    fn test(actual: AssignmentNode, expected: &str) {
53        let parsed = &parse_assignment(expected).expect(expected);
54        let expected = translate_assignment(parsed);
55        assert_eq!(actual.try_into(), expected);
56    }
57
58    #[test]
59    fn assignment() {
60        let actual = "foo = 1".into();
61        let expected = "foo = 1";
62        test(actual, expected);
63
64        let actual = r#"foo = "choco""#.into();
65        let expected = r#"foo = "choco""#;
66        test(actual, expected);
67
68        let actual = r#"Bar = mild"#.into();
69        let expected = r#"Bar = mild"#;
70        test(actual, expected);
71
72        let actual = AssignmentNode::Expr("foo".into(), "1".into());
73        let expected = "foo = 1";
74        test(actual, expected);
75
76        let actual = AssignmentNode::Expr("foo".into(), r#""cocoa""#.into());
77        let expected = r#"foo = "cocoa""#;
78        test(actual, expected);
79
80        let actual = AssignmentNode::Expr("Bar".into(), "mild".into());
81        let expected = "Bar = mild";
82        test(actual, expected);
83    }
84}
gluesql_core/ast_builder/assignment.rs

gluesql_core/ast_builder/
assignment.rs
