diff options
Diffstat (limited to 'libcpp/charset.c')
| -rw-r--r-- | libcpp/charset.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/libcpp/charset.c b/libcpp/charset.c index f028b371440..ba53f6337cc 100644 --- a/libcpp/charset.c +++ b/libcpp/charset.c @@ -923,9 +923,8 @@ ucn_valid_in_identifier (cpp_reader *pfile, cppchar_t c, program is ill-formed. *PSTR must be preceded by "\u" or "\U"; it is assumed that the - buffer end is delimited by a non-hex digit. Returns zero if UCNs - are not part of the relevant standard, or if the string beginning - at *PSTR doesn't syntactically match the form 'NNNN' or 'NNNNNNNN'. + buffer end is delimited by a non-hex digit. Returns zero if the + UCN has not been consumed. Otherwise the nonzero value of the UCN, whether valid or invalid, is returned. Diagnostics are emitted for invalid values. PSTR @@ -974,10 +973,15 @@ _cpp_valid_ucn (cpp_reader *pfile, const uchar **pstr, } while (--length && str < limit); + /* Partial UCNs are not valid in strings, but decompose into + multiple tokens in identifiers, so we can't give a helpful + error message in that case. */ + if (length && identifier_pos) + return 0; + *pstr = str; if (length) { - /* We'll error when we try it out as the start of an identifier. */ cpp_error (pfile, CPP_DL_ERROR, "incomplete universal character name %.*s", (int) (str - base), base); |