make fields not public

compiler/ast/src/functions/input/function_input.rs

@@ -44,14 +44,33 @@ impl fmt::Display for ParamMode {
 pub struct FunctionInputVariable {
     /// The name the parameter is accessible as in the function's body.
     pub identifier: Identifier,
-    /// Is it a const parameter?
+    /// The mode of the function parameter.
-    pub mode: ParamMode,
+    mode: ParamMode,
     /// What's the parameter's type?
-    pub type_: Type,
+    type_: Type,
     /// The parameters span from any annotations to its type.
     pub span: Span,
 }
 
+impl FunctionInputVariable {
+    pub fn new(identifier: Identifier, mode: ParamMode, type_: Type, span: Span) -> Self {
+        Self {
+            identifier,
+            mode,
+            type_,
+            span,
+        }
+    }
+
+    pub fn mode(&self) -> ParamMode {
+        self.mode
+    }
+
+    pub fn type_(&self) -> Type {
+        self.type_.clone()
+    }
+}
+
 impl FunctionInputVariable {
     fn format(&self, f: &mut fmt::Formatter) -> fmt::Result {
         write!(f, "{} ", self.mode)?;

compiler/ast/src/reducer/reconstructing_director.rs

@@ -282,7 +282,7 @@ impl<R: ReconstructingReducer> ReconstructingDirector<R> {
         variable: &FunctionInputVariable,
     ) -> Result<FunctionInputVariable> {
         let identifier = self.reduce_identifier(&variable.identifier)?;
-        let type_ = self.reduce_type(&variable.type_, &variable.span)?;
+        let type_ = self.reduce_type(&variable.type_(), &variable.span)?;
 
         self.reducer.reduce_function_input_variable(variable, identifier, type_)
     }

compiler/ast/src/reducer/reconstructing_reducer.rs

@@ -272,12 +272,12 @@ pub trait ReconstructingReducer {
         identifier: Identifier,
         type_: Type,
     ) -> Result<FunctionInputVariable> {
-        Ok(FunctionInputVariable {
+        Ok(FunctionInputVariable::new(
             identifier,
-            mode: variable.mode,
+            variable.mode(),
             type_,
-            span: variable.span.clone(),
+            variable.span.clone(),
-        })
+        ))
     }
 
     fn reduce_function_input(&mut self, _input: &FunctionInput, new: FunctionInput) -> Result<FunctionInput> {

compiler/parser/src/parser/file.rs

@@ -91,12 +91,12 @@ impl ParserContext<'_> {
 
         self.expect(Token::Colon)?;
         let type_ = self.parse_type()?.0;
-        Ok(FunctionInput::Variable(FunctionInputVariable {
+        Ok(FunctionInput::Variable(FunctionInputVariable::new(
+            name.clone(),
             mode,
             type_,
-            span: name.span.clone(),
+            name.span,
-            identifier: name,
+        )))
-        }))
     }
 
     /// Returns an [`(Identifier, Function)`] AST node if the next tokens represent a function name