[AST] Adding indexing operations

include/ast.h

@@ -89,11 +89,45 @@ private:
   std::vector<T> values_;
 };
 
+enum range_enum_t{
+  ALL,
+  NEWAXIS
+};
+
+class range: public node{
+public:
+  range(range_enum_t type)
+    : type_(type){}
+
+  range_enum_t type() const{
+    return type_;
+  }
+
+public:
+  const range_enum_t type_;
+};
+
 class expression: public node{
 public:
   virtual llvm::Value* codegen(module *) const = 0;
 };
 
+class postfix_expression: public expression{
+
+};
+
+class indexing_expression: public postfix_expression{
+public:
+  indexing_expression(node *id, node *ranges)
+    : id_((const identifier*)id), ranges_((const list<range*>*)ranges) {}
+
+  llvm::Value* codegen(module *) const;
+
+private:
+  const identifier* id_;
+  const list<range*>* ranges_;
+};
+
 class unary_expression: public node{
 public:
   unary_expression(node *id): id_((const identifier*)id) {}

include/parser.y

@@ -49,7 +49,7 @@ TYPE_T get_type_spec(node *op) { return ((token*)op)->type; }
 %token XOR_ASSIGN OR_ASSIGN TYPE_NAME
 %token VOID UINT8 UINT16 UINT32 UINT64 INT8 INT16 INT32 INT64 FP32 FP64
 %token IF ELSE FOR
-%token DEF
+%token NEWAXIS
 
 %start translation_unit
 %%
@@ -115,8 +115,21 @@ primary_expression
   | '(' expression ')' { $$ = $1; }
 	;
 
+range
+  : ':' { $$ = new range(tdl::ast::ALL); }
+  | NEWAXIS { $$ = new range(tdl::ast::NEWAXIS); }
+
+range_list
+  : range { $$ = new list<range*>((range*)$1); }
+  | range_list ',' range { $$ = append_ptr_list<range>($1, $2); }
+
+postfix_expression
+  : primary_expression { $$ = $1;}
+  | identifier '[' range_list ']' { $$ = new indexing_expression($1, $2);}
+  ;
+
 unary_expression
-	: primary_expression { $$ = $1; }
+  : postfix_expression { $$ = $1; }
   | INC_OP unary_expression { $$ = new unary_operator(INC, $2); }
   | DEC_OP unary_expression { $$ = new unary_operator(DEC, $2); }
   | unary_operator cast_expression { $$ = new unary_operator(get_unary_op($1), $2); }

include/scanner.l

@@ -16,7 +16,7 @@ int comment();
 %}
 
 %%
-"def"			{ count(); return(DEF); }
+"newaxis"			{ count(); return(NEWAXIS); }
 "if"			{ count(); return(IF); }
 "else"			{ count(); return(ELSE); }
 "for"			{ count(); return(FOR); }

lib/codegen.cpp

@@ -482,6 +482,11 @@ Value* binary_operator::codegen(module *mod) const{
   return result;
 }
 
+/* Postfix expression */
+Value* indexing_expression::codegen(module *mod) const{
+  return nullptr;
+}
+
 /* Unary operator */
 Value *unary_operator::llvm_op(llvm::IRBuilder<> &builder, Value *arg, const std::string &name) const{
   Type *atype = arg->getType();