Raise an error if recursion depth exceeds a maximum value

This is preferable to having the assembler crash with a stack overflow
error, because the user can now see which invocation caused the
overflow.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 9b9b87a..09e2fbb 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,5 @@
 const MAX_ITERATIONS_TO_STABILISE: usize = 4;
+const MAX_RECURSION_DEPTH: usize = 1024;
 
 mod stages;
 mod types;