diff options
Diffstat (limited to 'usr.bin/yacc/reader.c')
| -rw-r--r-- | usr.bin/yacc/reader.c | 53 |
1 files changed, 52 insertions, 1 deletions
diff --git a/usr.bin/yacc/reader.c b/usr.bin/yacc/reader.c index 4566570..e0eed8d 100644 --- a/usr.bin/yacc/reader.c +++ b/usr.bin/yacc/reader.c @@ -33,7 +33,7 @@ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * - * $Id$ + * $Id: reader.c,v 1.6 1997/02/22 19:58:01 peter Exp $ */ #ifndef lint @@ -329,6 +329,8 @@ keyword() return (UNION); if (strcmp(cache, "ident") == 0) return (IDENT); + if (strcmp(cache, "expect") == 0) + return (EXPECT); } else { @@ -974,6 +976,51 @@ int assoc; } +/* + * %expect requires special handling + * as it really isn't part of the yacc + * grammar only a flag for yacc proper. + */ +static void +declare_expect(assoc) +int assoc; +{ + register int c; + + if (assoc != EXPECT) ++prec; + + /* + * Stay away from nextc - doesn't + * detect EOL and will read to EOF. + */ + c = *++cptr; + if (c == EOF) unexpected_EOF(); + + for(;;) + { + if (isdigit(c)) + { + SRexpect = get_number(); + break; + } + /* + * Looking for number before EOL. + * Spaces, tabs, and numbers are ok, + * words, punc., etc. are syntax errors. + */ + else if (c == '\n' || isalpha(c) || !isspace(c)) + { + syntax_error(lineno, line, cptr); + } + else + { + c = *++cptr; + if (c == EOF) unexpected_EOF(); + } + } +} + + static void declare_types() { @@ -1060,6 +1107,10 @@ read_declarations() declare_tokens(k); break; + case EXPECT: + declare_expect(k); + break; + case TYPE: declare_types(); break; |
