pgx_sql_entity_graph/pg_trigger/
attribute.rs

1/*!
2
3`#[pg_trigger]` attribute related macro expansion for Rust to SQL translation
4
5> Like all of the [`sql_entity_graph`][crate::pgx_sql_entity_graph] APIs, this is considered **internal**
6to the `pgx` framework and very subject to change between versions. While you may use this, please do it with caution.
7
8*/
9use crate::ToSqlConfig;
10use proc_macro2::Span;
11use syn::parse::{Parse, ParseStream};
12use syn::Token;
13
14#[derive(Debug, Clone, Hash, Eq, PartialEq)]
15pub enum PgTriggerAttribute {
16    Sql(ToSqlConfig),
17}
18
19impl Parse for PgTriggerAttribute {
20    fn parse(input: ParseStream) -> Result<Self, syn::Error> {
21        let ident: syn::Ident = input.parse()?;
22        let found = match ident.to_string().as_str() {
23            "sql" => {
24                use crate::pgx_attribute::ArgValue;
25                use syn::Lit;
26
27                let _eq: Token![=] = input.parse()?;
28                match input.parse::<ArgValue>()? {
29                    ArgValue::Path(p) => Self::Sql(ToSqlConfig::from(p)),
30                    ArgValue::Lit(Lit::Bool(b)) => Self::Sql(ToSqlConfig::from(b.value)),
31                    ArgValue::Lit(Lit::Str(s)) => Self::Sql(ToSqlConfig::from(s)),
32                    ArgValue::Lit(other) => {
33                        return Err(syn::Error::new(
34                            other.span(),
35                            "expected boolean, path, or string literal",
36                        ))
37                    }
38                }
39            }
40            e => {
41                return Err(syn::Error::new(
42                    Span::call_site(),
43                    format!(
44                        "Invalid option `{}` inside `{} {}`",
45                        e,
46                        ident.to_string(),
47                        input.to_string()
48                    ),
49                ))
50            }
51        };
52        Ok(found)
53    }
54}
pgx_sql_entity_graph/pg_trigger/attribute.rs

pgx_sql_entity_graph/pg_trigger/
attribute.rs
