From fc004d69245b3d7af7326298d2bdbdb259127a68 Mon Sep 17 00:00:00 2001
From: Paweł Dybiec <pdybiec@stud.cs.uni.wroc.pl>
Date: Sun, 4 Nov 2018 22:13:54 +0100
Subject: Group operators of same precedence in productions

---
 source/mod_student/parser.mly | 68 ++++++++++++++++++++-----------------------
 1 file changed, 31 insertions(+), 37 deletions(-)

diff --git a/source/mod_student/parser.mly b/source/mod_student/parser.mly
index 7a6c303..76d7fe6 100644
--- a/source/mod_student/parser.mly
+++ b/source/mod_student/parser.mly
@@ -97,6 +97,24 @@ typ:
 base_type:
     | T_INT  {TEXPR_Int {loc=mkLocation $startpos} }
     | T_BOOL {TEXPR_Bool {loc=mkLocation $startpos} }
+op_unary:
+    | OP_MINUS { UNOP_Neg }
+    | OP_NOT   { UNOP_Not }
+op_mult_prec:
+    | OP_MULT {BINOP_Mult}
+    | OP_DIV  {BINOP_Div}
+    | OP_REM  {BINOP_Rem}
+op_add_prec:
+    | OP_PLUS   {BINOP_Add}
+    | OP_MINUS  {BINOP_Sub}
+op_cmp_prec:
+    | OP_LE  {RELOP_Le}
+    | OP_LT  {RELOP_Lt}
+    | OP_GE  {RELOP_Ge}
+    | OP_GT  {RELOP_Gt}
+op_eq_prec:
+    | OP_EQ   {RELOP_Eq}
+    | OP_NEQ  {RELOP_Ne}
 expression:
     | node=expression_or {node}
 expression_or:
@@ -110,55 +128,31 @@ expression_and:
        {EXPR_Binop {tag=mkTag ();loc=mkLocation $startpos;
         op=BINOP_And;lhs=left;rhs=right } }
 expression_eq:
-    | node=expression_rel {node}
-    | left=expression_eq OP_EQ right=expression_rel
+    | node=expression_cmp {node}
+    | left=expression_eq op=op_eq_prec right=expression_cmp
        {EXPR_Relation {tag=mkTag ();loc=mkLocation $startpos;
         op=RELOP_Eq;lhs=left;rhs=right } }
-    | left=expression_eq OP_NEQ right=expression_rel
-       {EXPR_Relation {tag=mkTag ();loc=mkLocation $startpos;
-        op=RELOP_Ne;lhs=left;rhs=right } }
-expression_rel:
+expression_cmp:
     | node=expression_add {node}
-    | left=expression_rel OP_LE right=expression_add
-       {EXPR_Relation {tag=mkTag ();loc=mkLocation $startpos;
-        op=RELOP_Le;lhs=left;rhs=right } }
-    | left=expression_rel OP_GE right=expression_add
-       {EXPR_Relation {tag=mkTag ();loc=mkLocation $startpos;
-        op=RELOP_Ge;lhs=left;rhs=right } }
-    | left=expression_rel OP_LT right=expression_add
-       {EXPR_Relation {tag=mkTag ();loc=mkLocation $startpos;
-        op=RELOP_Lt;lhs=left;rhs=right } }
-    | left=expression_rel OP_GT right=expression_add
+    | left=expression_cmp op=op_cmp_prec right=expression_add
        {EXPR_Relation {tag=mkTag ();loc=mkLocation $startpos;
-        op=RELOP_Gt;lhs=left;rhs=right } }
+        op=op;lhs=left;rhs=right } }
 expression_add:
     | node=expression_mult { node }
-    | left=expression_add OP_PLUS right=expression_mult
+    | left=expression_add op=op_add_prec right=expression_mult
        {EXPR_Binop {tag=mkTag ();loc=mkLocation $startpos;
-        op=BINOP_Add;lhs=left;rhs=right } }
-    | left=expression_add OP_MINUS right=expression_mult
-       {EXPR_Binop {tag=mkTag ();loc=mkLocation $startpos;
-        op=BINOP_Sub;lhs=left;rhs=right } }
+        op=op;lhs=left;rhs=right } }
 expression_mult:
     | node=expression_unary { node }
-    | left=expression_mult OP_MULT right=expression_unary
-       {EXPR_Binop {tag=mkTag ();loc=mkLocation $startpos;
-        op=BINOP_Mult;lhs=left;rhs=right } }
-    | left=expression_mult OP_DIV right=expression_unary
+    | left=expression_mult op=op_mult_prec right=expression_unary
        {EXPR_Binop {tag=mkTag ();loc=mkLocation $startpos;
-        op=BINOP_Div;lhs=left;rhs=right } }
-    | left=expression_mult OP_REM right=expression_unary
-       {EXPR_Binop {tag=mkTag ();loc=mkLocation $startpos;
-        op=BINOP_Rem;lhs=left;rhs=right } }
+        op=op;lhs=left;rhs=right } }
 expression_unary:
-    | node=expression_highest { node }
-    |  OP_MINUS right=expression_unary
-       {EXPR_Unop {tag=mkTag ();loc=mkLocation $startpos;
-        op=UNOP_Neg;sub=right } }
-    |  OP_NOT right=expression_unary
+    | node=expression_highest_prec { node }
+    |  op=op_unary right=expression_unary
        {EXPR_Unop {tag=mkTag ();loc=mkLocation $startpos;
-        op=UNOP_Not;sub=right } }
-expression_highest:
+        op=op;sub=right } }
+expression_highest_prec:
     | node=expression_integer { node }
     | node=expression_identifier { node }
     (* TODO Add calls and arrays and other constants   *)
-- 
cgit 1.4.1