visibility changes

cozo-core/src/data/expr.rs

@@ -19,6 +19,7 @@ use smartstring::SmartString;
 use thiserror::Error;
 
 use crate::data::functions::*;
+use crate::data::relation::NullableColType;
 use crate::data::symb::Symbol;
 use crate::data::value::{DataValue, LARGEST_UTF_CHAR};
 use crate::parse::expr::expr2bytecode;
@@ -636,6 +637,15 @@ pub struct Op {
     pub(crate) inner: fn(&[DataValue]) -> Result<DataValue>,
 }
 
+/// Used as `Arc<dyn CustomOp>`
+pub trait CustomOp {
+    fn name(&self) -> &'static str;
+    fn min_arity(&self) -> usize;
+    fn vararg(&self) -> bool;
+    fn return_type(&self) -> NullableColType;
+    fn call(&self, args: &[DataValue]) -> Result<DataValue>;
+}
+
 impl serde::Serialize for &'_ Op {
     fn serialize<S>(&self, serializer: S) -> std::result::Result<S::Ok, S::Error>
     where

cozo-core/src/data/relation.rs

@@ -22,9 +22,9 @@ use crate::data::expr::Expr;
 use crate::data::value::{DataValue, UuidWrapper, Validity, ValidityTs, Vector};
 
 #[derive(Debug, Clone, Eq, PartialEq, serde_derive::Deserialize, serde_derive::Serialize)]
-pub(crate) struct NullableColType {
+pub struct NullableColType {
-    pub(crate) coltype: ColType,
+    pub coltype: ColType,
-    pub(crate) nullable: bool,
+    pub nullable: bool,
 }
 
 impl Display for NullableColType {
@@ -75,7 +75,7 @@ impl Display for NullableColType {
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, serde_derive::Deserialize, serde_derive::Serialize)]
-pub(crate) enum ColType {
+pub enum ColType {
     Any,
     Bool,
     Int,
@@ -96,7 +96,7 @@ pub(crate) enum ColType {
 }
 
 #[derive(Debug, Clone, Eq, PartialEq, Hash, serde_derive::Deserialize, serde_derive::Serialize)]
-pub(crate) enum VecElementType {
+pub enum VecElementType {
     F32,
     F64,
 }