From 85cf2d9f5a1018219beb51c1172842cddda1f544 Mon Sep 17 00:00:00 2001
From: Krasimir Angelov <kr.angelov@gmail.com>
Date: Tue, 5 Sep 2017 09:50:29 +0200
Subject: added exprSize in the Haskell binding

---
 src/runtime/haskell-bind/PGF2.hsc | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

(limited to 'src/runtime/haskell-bind/PGF2.hsc')

diff --git a/src/runtime/haskell-bind/PGF2.hsc b/src/runtime/haskell-bind/PGF2.hsc
index f2f1b4113..4990a1926 100644
--- a/src/runtime/haskell-bind/PGF2.hsc
+++ b/src/runtime/haskell-bind/PGF2.hsc
@@ -39,7 +39,7 @@ module PGF2 (-- * PGF
              mkFloat,unFloat,
              mkMeta,unMeta,
              mkCId,
-             exprHash,
+             exprHash, exprSize,
              treeProbability,
 
              -- ** Types
@@ -331,7 +331,13 @@ exprHash h (Expr c_expr touch1) =
     touch1
     return (fromIntegral h)
 
-    
+exprSize :: Expr -> Int32
+exprSize (Expr c_expr touch1) =
+  unsafePerformIO $ do
+    size <- pgf_expr_size c_expr
+    touch1
+    return (fromIntegral size)
+
 
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