Class method AST gen

parser/src/ast.rs

@@ -79,6 +79,7 @@ pub enum TopLevelKind {
         name: String,
         fields: Vec<VarDeclStmt>,
         constructor: ClassConstructor,
+        methods: Vec<ClassMethod>,
     },
 }
 
@@ -91,11 +92,11 @@ pub struct ClassConstructor {
 
 #[derive(Debug, Clone, Serialize)]
 pub struct ClassMethod {
-    export: bool,
-    name: String,
-    params: ParamList,
-    return_type: TypeExpr,
-    body: Block,
+    pub export: bool,
+    pub name: String,
+    pub params: ParamList,
+    pub return_type: TypeExpr,
+    pub body: Block,
 }
 
 #[derive(Debug, Clone, Serialize)]

parser/src/grammar.pest

@@ -26,8 +26,6 @@ class_constructor = {
 
 class_fields = { var_decl_statement* }
 
-class_methods = { method* }
-
 self_param = { "self" ~ mutable? ~ deref_px? }
 
 method = {
@@ -35,7 +33,7 @@ method = {
 }
 
 class_decl = {
-    "class" ~ identifier ~ "{" ~ class_fields ~ class_constructor ~ class_methods ~ "}"
+    "class" ~ identifier ~ "{" ~ class_fields ~ class_constructor ~ method* ~ "}"
 }
 
 // ================= TOP LEVEL =================

parser/src/lib.rs

@@ -320,6 +320,7 @@ impl From<pest::iterators::Pair<'_, Rule>> for TopLevelKind {
                     .map(VarDeclStmt::from)
                     .collect(),
                 constructor: ClassConstructor::from(inner.next().unwrap()),
+                methods: inner.into_iter().map(ClassMethod::from).collect(),
             },
 
             _ => unimplemented!("{rule:#?}"),
@@ -594,3 +595,85 @@ impl From<pest::iterators::Pair<'_, Rule>> for VarDecl {
         }
     }
 }
+
+impl From<pest::iterators::Pair<'_, Rule>> for ClassMethod {
+    fn from(pair: pest::iterators::Pair<'_, Rule>) -> Self {
+        let mut inner = pair.into_inner();
+
+        let export = if let Some(first) = inner.peek() {
+            if first.as_rule() == Rule::export {
+                inner.next();
+                true
+            } else {
+                false
+            }
+        } else {
+            false
+        };
+
+        let return_type = TypeExpr::from(inner.next().unwrap());
+
+        let name = inner.next().unwrap().as_str().to_string();
+        let self_param = if inner.peek().unwrap().as_rule() == Rule::self_param {
+            let mut param = inner.next().unwrap().into_inner();
+            let name = format!("self");
+
+            let mutable = param
+                .peek()
+                .map(|p| p.as_rule() == Rule::mutable)
+                .unwrap_or_default();
+
+            if mutable {
+                param.next();
+            }
+
+            let is_ref = param
+                .peek()
+                .map(|p| p.as_rule() == Rule::deref_px)
+                .unwrap_or_default();
+
+            if is_ref {
+                param.next();
+            }
+
+            Some(VarDecl {
+                mutable: mutable && !is_ref,
+                name,
+                type_: Some(TypeExpr(
+                    TypeExprKind::Path(Path(vec![format!("Self")])),
+                    if is_ref {
+                        vec![if mutable {
+                            TypePostfix::RefMut
+                        } else {
+                            TypePostfix::Ref
+                        }]
+                    } else {
+                        Vec::new()
+                    },
+                )),
+            })
+        } else {
+            None
+        };
+
+        let params = if inner.peek().unwrap().as_rule() == Rule::param_list {
+            let mut params = ParamList::from(inner.next().unwrap());
+            if let Some(x) = self_param {
+                params.0.insert(0, x);
+            }
+            params
+        } else {
+            ParamList(self_param.into_iter().collect())
+        };
+
+        let body = Block::from(inner.next().unwrap());
+
+        Self {
+            export,
+            name,
+            params,
+            return_type,
+            body,
+        }
+    }
+}

src/codegen.rs

@@ -362,7 +362,9 @@ impl ToRust for TopLevelKind {
                 name,
                 fields,
                 constructor,
+                methods,
             } => {
+                dbg!(methods);
                 // Struct decl
                 let vis = if *export { "pub " } else { "" };
                 cg.addln(&format!("{}struct {} {{", vis, name));