ParenExpr, better print formatting

parser.v

@@ -70,8 +70,7 @@ fn (mut s SymbolTable) is_in_global_scope() bool {
 
 // ------------------------------------------- Expressions
 
-type Expr = VoidExpr | BinaryExpr | IntegerLiteral | RealLiteral | BoolLiteral | Variable | TypeExpr | Function | TypeCast
-type LiteralExpr = IntegerLiteral | RealLiteral | BoolLiteral
+type Expr = VoidExpr | BinaryExpr | IntegerLiteral | RealLiteral | BoolLiteral | Variable | TypeExpr | Function | TypeCast | ParenExpr
 
 struct VoidExpr {}
 
@@ -106,8 +105,12 @@ struct Function {
 }
 
 struct TypeCast {
-	expr Expr
 	type string
+	expr Expr
+}
+
+struct ParenExpr {
+	expr Expr
 }
 
 // ------------------------------------------- Statements
@@ -116,8 +119,8 @@ type Stmt = VarDecl | ExprStmt | ReturnStmt | Block | FuncDecl
 
 struct VarDecl {
 	name string
-	value Expr
 	type string
+	value Expr
 }
 
 struct FuncDecl {
@@ -201,6 +204,7 @@ fn (mut p Parser) parse_primary() Expr {
 		.identifier {Variable{token.text}}
 		.kw_fn      {Function{token.text}}
 		.type       {p.parse_type(token.text)}
+		.lparen     {p.parse_paren()}
 		else {parse_error("Unexpected Token")}
 	}
 }
@@ -244,8 +248,15 @@ fn (mut p Parser) parse_type(type string) Expr {
 	return TypeExpr {name: type}
 }
 
+fn (mut p Parser) parse_paren() ParenExpr {
+	expr := p.parse_expr()
+	p.expect(.rparen)
+	return ParenExpr{expr: expr}
+}
+
 fn (mut p Parser) get_expr_type(expr Expr) string {
 	return match expr {
+		ParenExpr      {p.get_expr_type(expr.expr)}
 		IntegerLiteral {'int'}
 		RealLiteral    {'real'}
 		BoolLiteral    {'bool'}