tuple

src/parser.y

@@ -57,6 +57,7 @@
 %type <std::unique_ptr<Slice>> slice
 %type <std::unique_ptr<Stmt>> stmt
 %type <std::vector<std::unique_ptr<Expr>>> args
+%type <std::vector<std::unique_ptr<Expr>>> tuple
 %type <std::vector<std::unique_ptr<Stmt>>> stmt_list
 %type <std::vector<std::string>> params
 
@@ -110,6 +111,7 @@ expr:
     | expr L_PAREN args R_PAREN { $$ = std::make_unique<Call>(std::move($1), std::move($3));}
     | expr DOT IDENTIFIER { $$ = std::make_unique<Attribute>(std::move($1), $3);}
     | L_BRACKET args R_BRACKET { $$ = std::make_unique<List>(std::move($2));}
+    | L_PAREN tuple R_PAREN { $$ = std::make_unique<Tuple>(std::move($2));}
     | MINUS expr { $$ = std::make_unique<UnaryOpExpr>(UnaryOperator(UnaryOperator::NEG), std::move($2));}
     ;
 
@@ -131,6 +133,11 @@ args:
     | args COMMA expr     { $1.push_back(std::move($3)); $$ = std::move($1); }
     ;
 
+tuple:
+      expr                { $$ = std::vector<std::unique_ptr<Expr>>();
+                            $$.push_back(std::move($1)); }
+    | tuple COMMA expr    { $1.push_back(std::move($3)); $$ = std::move($1); }
+
 params:
                           { $$ = std::vector<std::string>();}
     | IDENTIFIER          { $$ = std::vector<std::string>(); $$.push_back($1); }