implement 'try'

1 files changed, 10 insertions, 0 deletions

diff --git a/neb/std/core.py b/neb/std/core.py
index cf0686b..9e2e743 100644
--- a/neb/std/core.py
+++ b/neb/std/core.py
@@ -274,3 +274,13 @@ def interpretBench(symbol, args, env, ns):
     return ret
 
 CORE.register("bench", NebSyntax("bench", interpretBench, [Arg("command", TypeEnum.ANY)], return_type=Type(":any")))
+
+def interpretTry(symbol, args, env, ns):
+    try:
+        return evaluate(args[0], env, ns)
+    except NebPanic as e:
+        new_env = Environment(env)
+        new_env.register("_panic_", String(f"{e}"))
+        return evaluate(args[1], new_env, ns)
+
+CORE.register("try", NebSyntax("try", interpretTry, [Arg("expr", TypeEnum.ANY), Arg("except", TypeEnum.ANY)], return_type=Type(":any")))