refact: refactor type declarations and drop custom types (#32)

Author: YoEight

src/arena.rs

@@ -39,13 +39,6 @@ impl StringArena {
         self.cache.get(&self.hasher.hash_one(value)).copied()
     }
 
-    /// Like ['str_ref'] but case-insensitive
-    pub fn str_ref_no_case(&self, value: &str) -> Option<StrRef> {
-        self.cache
-            .get(&self.hasher.hash_one(Ascii::new(value)))
-            .copied()
-    }
-
     /// Interns a string using case-insensitive hashing.
     ///
     /// Two strings that differ only in ASCII case will resolve to the same [`StrRef`].
@@ -67,11 +60,6 @@ impl StringArena {
     pub fn get(&self, key: StrRef) -> &str {
         &self.slots[key.0]
     }
-
-    /// Compares two interned strings for case-insensitive ASCII equality.
-    pub fn eq_ignore_ascii_case(&self, ka: StrRef, kb: StrRef) -> bool {
-        self.get(ka).eq_ignore_ascii_case(self.get(kb))
-    }
 }
 
 /// An expression node stored in the [`ExprArena`].

src/error.rs

@@ -199,10 +199,9 @@ pub enum AnalysisError {
     #[error("{0}:{1}: expected a record")]
     ExpectRecordLiteral(u32, u32),
 
-    /// When a custom type (meaning a type not supported by EventQL by default) is used but
-    /// not registered in the `AnalysisOptions` custom type set.
-    #[error("{0}:{1}: unsupported custom type '{2}'")]
-    UnsupportedCustomType(u32, u32, String),
+    /// When a type is not supported by EventQL.
+    #[error("{0}:{1}: unknown type '{2}'")]
+    UnknownType(u32, u32, String),
 
     /// A function was called with the wrong number of arguments.
     ///