Update README

1 files changed, 7 insertions, 0 deletions

diff --git a/README.md b/README.md
index 9715c90..b701fd6 100644
--- a/README.md
+++ b/README.md
@@ -93,6 +93,7 @@ The parser recognizes the following grammar:
           | Die 'a' Die
           | Die 'T' Die
           | Die 't' Die
+          | Die ' x ' Die
 
 Semantics are defined in terms of the `pool` function.
 
@@ -140,6 +141,9 @@ Semantics are defined in terms of the `pool` function.
   0, otherwise its value is 1.
 * `DtE` is like `T` but dice with values *higher* than what was rolled on `D` are
   counted as 0's, the rest as 1's.
+* `D x E` will repeatedly roll `D`. First `E` is rolled, then `D` is rolled as
+  many times as the value rolled on `E`. The pools generated by `D` are
+  concatenated to generate the new pool.
 
 Additionally:
 
@@ -153,3 +157,6 @@ Additionally:
   equivalent to `1d(2d3)`, use explicit parentheses if you need `(1d2)d3`).
 * Die operations bind stronger than the binary arithmetic operations
   (`1d6 + 1d4` is equivalent to `(1d6) + (1d4)`) and the bonus operations.
+* The repetition operation ` x ` is left assosiative. It binds stronger than
+  the standard arithmetic operations, but weaker than the dice operations and
+  the bonus operations.