refactoring the grammar

parser/src/grammar.pest

@@ -20,22 +20,19 @@ var_decl =  { type_expr ~ mutable? ~ identifier }
 // ================= TOP LEVEL =================
 
 attribute = {
-    "#" ~ "[" ~ (structured_style | list_style | key_value_style | simple_style) ~ "]"
+    "#" ~ "[" ~ (structured_style | list_style | pair_attr | simple_style) ~ "]"
 }
 
 // Simple: #[test]
-simple_style = { identifier }
+simple_style = { static_path }
-
-// Key-Value: #[crate_type = "lib"]
-key_value_style = { identifier ~ "=" ~ primary }
 
 // #[derive(PartialEq, PartialOrd)]
-list_style = { identifier ~ "(" ~ identifier ~ ("," ~ identifier)* ~ ","? ~ ")" }
+list_style = { static_path ~ "(" ~ identifier ~ ("," ~ identifier)* ~ ","? ~ ")" }
 
 // #[link(name = "readline")]
-structured_style = { identifier ~ "(" ~ pair ~ ("," ~ pair)* ~ ","? ~ ")" }
+structured_style = { static_path ~ "(" ~ pair_attr ~ ("," ~ pair_attr)* ~ ","? ~ ")" }
 
-pair = { identifier ~ "=" ~ primary }
+pair_attr = { identifier ~ "=" ~ primary }
 
 top_level = { attribute* ~ (import | function_decl | struct_decl) }
 

src/codegen.rs

@@ -1,6 +1,7 @@
 use parser::ast::{
     BinaryOp, Block, Expression, IfStmt, Literal, Postfix, Prefix, Statement, StaticPath, TopLevel,
-    TypeExpr, TypeExprKind, TypePostfix, VarAssignStmt, VarDecl, VarDeclStmt, WhileStmt,
+    TopLevelKind, TypeExpr, TypeExprKind, TypePostfix, VarAssignStmt, VarDecl, VarDeclStmt,
+    WhileStmt,
 };
 
 // ---------------------------------------------------------------------------
@@ -226,13 +227,19 @@ impl ToRust for Block {
 }
 
 impl ToRust for TopLevel {
+    fn to_rust(&self, cg: &mut RustCodegen) {
+        self.0.to_rust(cg);
+    }
+}
+
+impl ToRust for TopLevelKind {
     fn to_rust(&self, cg: &mut RustCodegen) {
         match self {
-            TopLevel::Include(path) => {
+            Self::Include(path) => {
                 cg.addln(&format!("use {};", path.get_rust()));
             }
 
-            TopLevel::StructDecl {
+            Self::StructDecl {
                 export,
                 name,
                 fields,
@@ -250,7 +257,7 @@ impl ToRust for TopLevel {
                 cg.addln("}\n");
             }
 
-            TopLevel::FunctionDecl {
+            Self::FunctionDecl {
                 export,
                 name,
                 params,
@@ -278,6 +285,7 @@ impl ToRust for TopLevel {
                 cg.indent -= 1;
                 cg.addln("}\n");
             }
+            Self::EOI => {}
         }
     }
 }