py: Protect mp_parse and mp_compile with nlr push/pop block.

To enable parsing constants more efficiently, mp_parse should be allowed
to raise an exception, and mp_compile can already raise a MemoryError.
So these functions need to be protected by an nlr push/pop block.

This patch adds that feature in all places.  This allows to simplify how
mp_parse and mp_compile are called: they now raise an exception if they
have an error and so explicit checking is not needed anymore.

1 files changed, 1 insertions, 0 deletions

diff --git a/py/compile.h b/py/compile.h
index 9d612da53..2d15de8b9 100644
--- a/py/compile.h
+++ b/py/compile.h
@@ -39,6 +39,7 @@ enum {
     MP_EMIT_OPT_ASM_THUMB,
 };
 
+// the compiler will raise an exception if an error occurred
 // the compiler will free the parse tree (pn) before it returns
 mp_obj_t mp_compile(mp_parse_node_t pn, qstr source_file, uint emit_opt, bool is_repl);