gh-105194: Fix format specifier escaped characters in f-strings (#105231)

1 files changed, 19 insertions, 0 deletions

diff --git a/Parser/action_helpers.c b/Parser/action_helpers.c
index 2411da2..7786124 100644
--- a/Parser/action_helpers.c
+++ b/Parser/action_helpers.c
@@ -1350,6 +1350,25 @@ _PyPegen_joined_str(Parser *p, Token* a, asdl_expr_seq* raw_expressions, Token*b
                             p->arena);
 }
 
+expr_ty _PyPegen_decoded_constant_from_token(Parser* p, Token* tok) {
+    Py_ssize_t bsize;
+    char* bstr;
+    if (PyBytes_AsStringAndSize(tok->bytes, &bstr, &bsize) == -1) {
+        return NULL;
+    }
+    PyObject* str = _PyPegen_decode_string(p, 0, bstr, bsize, tok);
+    if (str == NULL) {
+        return NULL;
+    }
+    if (_PyArena_AddPyObject(p->arena, str) < 0) {
+        Py_DECREF(str);
+        return NULL;
+    }
+    return _PyAST_Constant(str, NULL, tok->lineno, tok->col_offset,
+                           tok->end_lineno, tok->end_col_offset,
+                           p->arena);
+}
+
 expr_ty _PyPegen_constant_from_token(Parser* p, Token* tok) {
     char* bstr = PyBytes_AsString(tok->bytes);
     if (bstr == NULL) {