3552

Stop requiring jump instructions to explicitly provide a ':label' type
for jump targets.

This has been a source of repeated confusion for my students:
  a) They'd add the ':label' to the label definition rather than the
  jump target (label use)
  b) They'd spend time thinking about whether the initial '+' prefix was
  part of the label name.

In the process I cleaned up a couple of things:

  - the space of names is more cleanly partitioned into labels and
    non-labels (clarifying that '_' and '-' are non-label prefixes)
  - you can't use label names as regular variables anymore
  - you can infer the type of a label just from its name

1 files changed, 1 insertions, 1 deletions

diff --git a/sandbox/011-errors.mu b/sandbox/011-errors.mu
index bd6d4e7c..6755af2d 100644
--- a/sandbox/011-errors.mu
+++ b/sandbox/011-errors.mu
@@ -120,7 +120,7 @@ after <render-sandbox-trace-done> [
     }
     row, screen <- render-text screen, sandbox-errors, left, right, 1/red, row
     # don't try to print anything more for this sandbox
-    jump +render-sandbox-end:label
+    jump +render-sandbox-end
   }
 ]