syntax: implement `delete` as proper operator

Turn `delete` into a proper operator mimicking ECMAScript semantics.

Also ensure to transparently turn deprecated `delete(obj, propname)`
function calls into `delete obj.propname` expressions during compilation.

When strict mode is active, legacy delete() calls throw a syntax error
instead.

Finally drop the `delete()` function from the stdlib as it is shadowed
by the delete operator syntax now.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

1 files changed, 1 insertions, 0 deletions

diff --git a/value.h b/value.h
index a3abfc6..7d4e2b1 100644
--- a/value.h
+++ b/value.h
@@ -48,6 +48,7 @@ uc_type_t uc_cast_number(uc_value_t *v, int64_t *n, double *d);
 
 uc_value_t *uc_getval(uc_vm *, uc_value_t *scope, uc_value_t *key);
 uc_value_t *uc_setval(uc_vm *, uc_value_t *scope, uc_value_t *key, uc_value_t *val);
+bool uc_delval(uc_vm *, uc_value_t *scope, uc_value_t *key);
 
 void uc_vallist_init(uc_value_list *list);
 void uc_vallist_free(uc_value_list *list);