1 files changed, 49 insertions, 0 deletions
diff --git a/py/parsehelper.c b/py/parsehelper.c
new file mode 100644
index 0000000000..3177e9a341
--- /dev/null
+++ b/py/parsehelper.c
@@ -0,0 +1,49 @@
+// these functions are separate from parse.c to keep parser independent of mp_obj_t
+
+#include <stdint.h>
+#include <stdio.h>
+
+#include "misc.h"
+#include "mpconfig.h"
+#include "qstr.h"
+#include "lexer.h"
+#include "parse.h"
+#include "obj.h"
+#include "parsehelper.h"
+
+#define STR_UNEXPECTED_INDENT "unexpected indent"
+#define STR_UNMATCHED_UNINDENT "unindent does not match any outer indentation level"
+#define STR_INVALID_SYNTAX "invalid syntax"
+
+void mp_parse_show_exception(mp_lexer_t *lex, mp_parse_error_kind_t parse_error_kind) {
+    printf("  File \"%s\", line %d, column %d\n", qstr_str(mp_lexer_source_name(lex)), mp_lexer_cur(lex)->src_line, mp_lexer_cur(lex)->src_column);
+    switch (parse_error_kind) {
+        case MP_PARSE_ERROR_UNEXPECTED_INDENT:
+            printf("IndentationError: %s\n", STR_UNEXPECTED_INDENT);
+            break;
+
+        case MP_PARSE_ERROR_UNMATCHED_UNINDENT:
+            printf("IndentationError: %s\n", STR_UNMATCHED_UNINDENT);
+            break;
+
+        case MP_PARSE_ERROR_INVALID_SYNTAX:
+        default:
+            printf("SyntaxError: %s\n", STR_INVALID_SYNTAX);
+            break;
+    }
+}
+
+mp_obj_t mp_parse_make_exception(mp_parse_error_kind_t parse_error_kind) {
+    // TODO add source file and line number to exception?
+    switch (parse_error_kind) {
+        case MP_PARSE_ERROR_UNEXPECTED_INDENT:
+            return mp_obj_new_exception_msg(&mp_type_IndentationError, STR_UNEXPECTED_INDENT);
+
+        case MP_PARSE_ERROR_UNMATCHED_UNINDENT:
+            return mp_obj_new_exception_msg(&mp_type_IndentationError, STR_UNMATCHED_UNINDENT);
+
+        case MP_PARSE_ERROR_INVALID_SYNTAX:
+        default:
+            return mp_obj_new_exception_msg(&mp_type_SyntaxError, STR_INVALID_SYNTAX);
+    }
+}