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/*!

Function and type level metadata entities for Rust to SQL translation

> Like all of the [`sql_entity_graph`][crate::pgrx_sql_entity_graph] APIs, this is considered **internal**
to the `pgrx` framework and very subject to change between versions. While you may use this, please do it with caution.


*/
use super::{ArgumentError, Returns, ReturnsError, SqlMapping};

#[derive(Clone, Debug, Hash, Eq, PartialEq, Ord, PartialOrd)]
pub struct FunctionMetadataEntity {
    pub arguments: Vec<FunctionMetadataTypeEntity>,
    pub retval: Option<FunctionMetadataTypeEntity>,
    pub path: &'static str,
}

#[derive(Clone, Debug, Hash, Eq, PartialEq, Ord, PartialOrd)]
pub struct FunctionMetadataTypeEntity {
    pub type_name: &'static str,
    pub argument_sql: Result<SqlMapping, ArgumentError>,
    pub return_sql: Result<Returns, ReturnsError>,
    pub variadic: bool,
    pub optional: bool,
}