From d2aa4a19080f602bd8b94d2a4698b73e0e852e84 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pawe=C5=82=20Dybiec?= <pdybiec@stud.cs.uni.wroc.pl>
Date: Thu, 8 Nov 2018 18:31:37 +0100
Subject: Added structs and array indexing

---
 source/mod_student/parser.mly | 26 +++++++++++++++++++++-----
 1 file changed, 21 insertions(+), 5 deletions(-)

diff --git a/source/mod_student/parser.mly b/source/mod_student/parser.mly
index b55622b..f8a71eb 100644
--- a/source/mod_student/parser.mly
+++ b/source/mod_student/parser.mly
@@ -144,16 +144,23 @@ expression_unary:
        {EXPR_Unop {tag=mkTag ();loc=mkLocation $startpos;
         op=op;sub=right } }
 expression_highest_prec:
-    | node=expression_base { node }
+    | node=expression_index { node }
     | node=expression_call { node }
     | node=expression_length { node }
+expression_index:
+    | sub=expression_base index=option( delimited(LSBRACKET,expression,RSBRACKET) )
+      {
+        match index with
+        | None -> sub
+        | Some index -> EXPR_Index {tag=mkTag (); loc=mkLocation $startpos; expr=sub; index=index} 
+      }
 expression_base:
     | node=expression_identifier { node }
     | node=expression_integer { node }
-    | node=expression_char { node }
-    | node=expression_string { node }
+    | node=expression_char    { node }
+    | node=expression_string  { node }
+    | node=expression_struct  { node }
     | LPAREN node=expression RPAREN { node }
-    (* TODO Add calls and arrays and other constants   *)
 expression_identifier:
     | id=identifier  { EXPR_Id {tag= mkTag ();loc=mkLocation $startpos;
                               id=id} }
@@ -171,6 +178,9 @@ expression_bool:
                               value=value} }
 expression_call:
     | value=call  { EXPR_Call value }
+expression_struct:
+    | LBRACKET elements=separated_list(COMMA,expression) RBRACKET
+      { EXPR_Struct { tag=mkTag (); loc=mkLocation $startpos; elements=elements} }
 expression_length:
     |  LENGTH LPAREN argument=expression RPAREN
       { EXPR_Length { tag=mkTag (); loc=mkLocation $startpos;
@@ -202,7 +212,13 @@ call:
     (* TODO Add other statements *)
 lvalue:
     | id=identifier {LVALUE_Id {loc=mkLocation $startpos;id=id} }
-    (* TODO lvalue index *)
+    | sub=lvalue_index LSBRACKET index=expression RSBRACKET 
+      {LVALUE_Index {loc=mkLocation $startpos;sub=sub;index=index} }
+lvalue_index:
+    | node=expression_identifier {node}
+    | node=expression_call {node}
+    | sub=lvalue_index LSBRACKET index=expression RSBRACKET
+      {EXPR_Index {tag=mkTag (); loc=mkLocation $startpos; expr=sub; index=index} }
 semicolons:
     | list(SEMICOLON) {}
 identifier:
-- 
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