Improved semantic errors

crates/mist-api/src/transpiler.mist

@@ -186,7 +186,7 @@ fn is_source_newer(source *Path, output *Path) std::io::Result<bool> {
 
 pub enum TranspileError<'a> {
     Parse[error::ParseError<'a, Vec<mist_parser::ast::TopLevel>>],
-    Semantic[mist_parser::semantics::SemanticError]
+    Semantic[Vec<mist_parser::semantics::SemanticError>]
 }
 
 pub fn transpile_code<'a>(path *PathBuf, source *'a str, mut output_file PathBuf, mod_decl *str, curr_mod_decl *Option<[mist_parser::ast::Visibility, mist_parser::ast::Identifier]>)
@@ -262,14 +262,16 @@ pub fn decode_err<'a>(err *TranspileError<'a>, path *PathBuf) {
     let curr_dir = std::env::current_dir().unwrap();
 
     match err {
-        TranspileError::Semantic[e] => {
-            eprintln!(
-                "\n{}:{}:{}\n \x1b[31mError\x1b[0m: {}",
-                path.strip_prefix(curr_dir).unwrap_or_else(|_| path).as_os_str().display(),
-                e.line,
-                e.column,
-                e.error_message,
-            );
+        TranspileError::Semantic[e_list] => {
+            for e in e_list {
+                eprintln!(
+                    "\n{}:{}:{}\n \x1b[31mError\x1b[0m: {}",
+                    path.strip_prefix(&curr_dir).unwrap_or_else(|_| path).as_os_str().display(),
+                    e.line,
+                    e.column,
+                    e.error_message,
+                );
+            }
         }
 
         TranspileError::Parse[e] => {

crates/parser/src/semantics.rs

@@ -33,11 +33,12 @@ pub fn find_function_call<'a>(
     })
 }
 
-pub fn check_class_semantics<'a>(top_level: &TopLevel) -> Result<(), SemanticError> {
+pub fn check_class_semantics<'a>(top_level: &TopLevel) -> Result<(), Vec<SemanticError>> {
     if let TopLevelKind::ClassDecl {
         fields,
         constructor,
         items,
+        name,
         ..
     } = &top_level.0.item
     {
@@ -63,15 +64,24 @@ pub fn check_class_semantics<'a>(top_level: &TopLevel) -> Result<(), SemanticErr
 
             let mut mutability_iter = mutability.into_iter();
 
+            let mut errs = Vec::new();
+
             for field in &fields {
                 if mutability_iter.find(|v| v == &field.item).is_none() {
-                    return Err(SemanticError {
+                    errs.push(SemanticError {
                         line: field.line,
                         column: field.column,
-                        error_message: format!("Field `{}` is uninitialized", field.item.0),
+                        error_message: format!(
+                            "class field `{}.{}` is uninitialized",
+                            name.0, field.item.0
+                        ),
                     });
                 }
             }
+
+            if errs.len() > 0 {
+                return Err(errs);
+            }
         }
 
         Ok(())