Struct PgExtern

pub struct PgExtern { /* private fields */ }

A parsed #[pg_extern] item.

It should be used with syn::parse::Parse functions.

Using quote::ToTokens will output the declaration for a PgExternEntity.

use syn::{Macro, parse::Parse, parse_quote, parse};
use quote::{quote, ToTokens};
use pgrx_sql_entity_graph::PgExtern;

use pgrx_sql_entity_graph::CodeEnrichment;
let parsed: CodeEnrichment<PgExtern> = parse_quote! {
    fn example(x: Option<str>) -> Option<&'a str> {
        unimplemented!()
    }
};
let sql_graph_entity_tokens = parsed.to_token_stream();

Implementations

impl PgExtern

pub fn new( attr: TokenStream2, item: TokenStream2, ) -> Result<CodeEnrichment<Self>, Error>

pub fn as_cast(&self, pg_cast: PgCast) -> PgExtern

Returns a new instance of this PgExtern with cast overwritten to pg_cast.

pub fn extern_attrs(&self) -> &[Attribute]

pub fn wrapper_func(&self) -> Result<ItemFn, Error>

Trait Implementations

impl Clone for PgExtern

fn clone(&self) -> PgExtern

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for PgExtern

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.