Implement proper exception type hierarchy.

Each built-in exception is now a type, with base type BaseException.
C exceptions are created by passing a pointer to the exception type to
make an instance of.  When raising an exception from the VM, an
instance is created automatically if an exception type is raised (as
opposed to an exception instance).

Exception matching (RT_BINARY_OP_EXCEPTION_MATCH) is now proper.

Handling of parse error changed to match new exceptions.

mp_const_type renamed to mp_type_type for consistency.

1 files changed, 8 insertions, 11 deletions

diff --git a/stm/main.c b/stm/main.c
index 3484fd28d..2bf7c1ba3 100644
--- a/stm/main.c
+++ b/stm/main.c
@@ -24,6 +24,7 @@
 #include "lexerfatfs.h"
 #include "parse.h"
 #include "obj.h"
+#include "parsehelper.h"
 #include "compile.h"
 #include "runtime0.h"
 #include "runtime.h"
@@ -404,15 +405,13 @@ void do_repl(void) {
         }
 
         mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, vstr_str(&line), vstr_len(&line), 0);
-        qstr parse_exc_id;
-        const char *parse_exc_msg;
-        mp_parse_node_t pn = mp_parse(lex, MP_PARSE_SINGLE_INPUT, &parse_exc_id, &parse_exc_msg);
+        mp_parse_error_kind_t parse_error_kind;
+        mp_parse_node_t pn = mp_parse(lex, MP_PARSE_SINGLE_INPUT, &parse_error_kind);
         qstr source_name = mp_lexer_source_name(lex);
 
         if (pn == MP_PARSE_NODE_NULL) {
             // parse error
-            mp_lexer_show_error_pythonic_prefix(lex);
-            printf("%s: %s\n", qstr_str(parse_exc_id), parse_exc_msg);
+            mp_parse_show_exception(lex, parse_error_kind);
             mp_lexer_free(lex);
         } else {
             // parse okay
@@ -456,15 +455,13 @@ bool do_file(const char *filename) {
         return false;
     }
 
-    qstr parse_exc_id;
-    const char *parse_exc_msg;
-    mp_parse_node_t pn = mp_parse(lex, MP_PARSE_FILE_INPUT, &parse_exc_id, &parse_exc_msg);
+    mp_parse_error_kind_t parse_error_kind;
+    mp_parse_node_t pn = mp_parse(lex, MP_PARSE_FILE_INPUT, &parse_error_kind);
     qstr source_name = mp_lexer_source_name(lex);
 
     if (pn == MP_PARSE_NODE_NULL) {
         // parse error
-        mp_lexer_show_error_pythonic_prefix(lex);
-        printf("%s: %s\n", qstr_str(parse_exc_id), parse_exc_msg);
+        mp_parse_show_exception(lex, parse_error_kind);
         mp_lexer_free(lex);
         return false;
     }
@@ -536,7 +533,7 @@ mp_obj_t pyb_gpio(uint n_args, mp_obj_t *args) {
     }
 
 pin_error:
-    nlr_jump(mp_obj_new_exception_msg_varg(MP_QSTR_ValueError, "pin %s does not exist", pin_name));
+    nlr_jump(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "pin %s does not exist", pin_name));
 }
 
 MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pyb_gpio_obj, 1, 2, pyb_gpio);