objarray: Implement array slice assignment.
This is rarely used feature which takes enough code to implement, so is
controlled by MICROPY_PY_ARRAY_SLICE_ASSIGN config setting, default off.
But otherwise it may be useful, as allows to update arbitrary-sized data
buffers in-place.
Slice is yet to implement, and actually, slice assignment implemented in
such a way that RHS of assignment should be array of the exact same item
typecode as LHS. CPython has it more relaxed, where RHS can be any sequence
of compatible types (e.g. it's possible to assign list of int's to a
bytearray slice).
Overall, when all "slice write" features are implemented, it may cost ~1KB
of code.
diff --git a/py/mpconfig.h b/py/mpconfig.h
index ed42fbc..acc5f66 100644
--- a/py/mpconfig.h
+++ b/py/mpconfig.h
@@ -409,6 +409,12 @@
#define MICROPY_PY_ARRAY (1)
#endif
+// Whether to support slice assignments for array (and bytearray).
+// This is rarely used, but adds ~0.5K of code.
+#ifndef MICROPY_PY_ARRAY_SLICE_ASSIGN
+#define MICROPY_PY_ARRAY_SLICE_ASSIGN (0)
+#endif
+
// Whether to provide "collections" module
#ifndef MICROPY_PY_COLLECTIONS
#define MICROPY_PY_COLLECTIONS (1)