diff --git a/vlib/v/ast/ast.v b/vlib/v/ast/ast.v
index 3f6fb63e8b..c03b598f02 100644
--- a/vlib/v/ast/ast.v
+++ b/vlib/v/ast/ast.v
@@ -128,7 +128,8 @@ pub:
 }
 
 pub struct InterfaceDecl {
-	name string
+	name        string
+	field_names []string
 }
 
 pub struct StructInit {
@@ -656,34 +657,6 @@ pub struct None {
 pub:
 	foo int // todo
 }
-/*
-enum BinaryOp {
-	sum
-	difference
-	product
-	quotient
-	remainder
-	bitwise_and
-	bitwise_or
-	bitwise_xor
-	left_shift
-	right_shift
-
-	equality
-	inequality
-	less_than
-	less_than_or_equal
-	more_than
-	more_than_or_equal
-
-	in_check
-
-	//These are suffixed with `bool` to prevent conflict with the keyword `or`
-	and_bool
-	or_bool
-}
-*/
-
 
 [inline]
 pub fn expr_is_blank_ident(expr Expr) bool {
diff --git a/vlib/v/gen/cgen.v b/vlib/v/gen/cgen.v
index ff605fe3e9..df0a717b82 100644
--- a/vlib/v/gen/cgen.v
+++ b/vlib/v/gen/cgen.v
@@ -323,21 +323,21 @@ fn (g mut Gen) stmt(node ast.Stmt) {
 		}
 		ast.EnumDecl {
 			name := it.name.replace('.', '__')
-			g.definitions.writeln('typedef enum {')
+			g.typedefs.writeln('typedef enum {')
 			for j, val in it.vals {
 				if j < it.default_exprs.len {
-					g.definitions.write('\t${name}_$val = ')
+					g.typedefs.write('\t${name}_$val = ')
 					pos := g.out.len
 					g.expr(it.default_exprs[j])
 					expr := g.out.after(pos)
 					g.out.go_back(expr.len)
-					g.definitions.writeln('$expr ,')
+					g.typedefs.writeln('$expr ,')
 				}
 				else {
-					g.definitions.writeln('\t${name}_$val, // $j')
+					g.typedefs.writeln('\t${name}_$val, // $j')
 				}
 			}
-			g.definitions.writeln('} $name;\n')
+			g.typedefs.writeln('} $name;\n')
 		}
 		ast.ExprStmt {
 			g.expr(it.expr)
@@ -1977,7 +1977,7 @@ fn (g mut Gen) write_init_function() {
 	g.writeln('}')
 	if g.autofree {
 		g.writeln('void _vcleanup() {')
-		//g.writeln('puts("cleaning up...");')
+		// g.writeln('puts("cleaning up...");')
 		if g.is_importing_os() {
 			g.writeln('free(_const_os__args.data);')
 			g.writeln('string_free(_const_os__wd_at_startup);')
diff --git a/vlib/v/parser/parser.v b/vlib/v/parser/parser.v
index a65604f482..8c6d4b377c 100644
--- a/vlib/v/parser/parser.v
+++ b/vlib/v/parser/parser.v
@@ -1592,9 +1592,11 @@ fn (p mut Parser) interface_decl() ast.InterfaceDecl {
 	p.next() // `interface`
 	interface_name := p.check_name()
 	p.check(.lcbr)
+	mut field_names := []string
 	for p.tok.kind != .rcbr && p.tok.kind != .eof {
 		line_nr := p.tok.line_nr
 		name := p.check_name()
+		field_names << name
 		p.fn_args()
 		if p.tok.kind == .name && p.tok.line_nr == line_nr {
 			p.parse_type()
@@ -1603,6 +1605,7 @@ fn (p mut Parser) interface_decl() ast.InterfaceDecl {
 	p.check(.rcbr)
 	return ast.InterfaceDecl{
 		name: interface_name
+		field_names: field_names
 	}
 }
 
@@ -1925,11 +1928,13 @@ fn (p mut Parser) type_decl() ast.TypeDecl {
 	}
 }
 
+fn (p &Parser) new_true_expr() ast.Expr {
+	return ast.BoolLiteral{
+		val: true
+	}
+}
+
 fn verror(s string) {
 	println(s)
 	exit(1)
 }
-
-fn (p &Parser) new_true_expr() ast.Expr {
-	return ast.BoolLiteral{ val: true }
-}