Functors: structs callable as functions.

* lib.c (generic_funcall): If an object is used as a function,
get its lambda method and call that.

* txr.1: Document functors.

1 files changed, 3 insertions, 0 deletions

diff --git a/lib.c b/lib.c
index 2771c18d..09e85693 100644
--- a/lib.c
+++ b/lib.c
@@ -4762,6 +4762,9 @@ val generic_funcall(val fun, struct args *args_in)
       default:
         callerror(fun, lit("too many arguments"));
       }
+    } else if (structp(fun)) {
+      fun = method(fun, lambda_s);
+      break;
     }
     /* fallthrough */
   default: