Autzoo.1588
net.bugs.v7
utzoo!henry
Tue Apr 20 19:51:59 1982
yacc library
The V7 distribution does not include the -ly library at all. This is
not serious since it can be built from the description in the manual.
I also added a default yylex to ours. The following are the sources,
the makefile, and a simple test program.
--- main.c ---
main()
{
return(yyparse());
}
--- yyerror.c ---
#include <STDIO.H>
yyerror(s)
char *s;
{
fprintf(stderr, "%s\n", s);
}
--- yylex.c ---
#include <STDIO.H>
int
yylex()
{
return(getchar());
}
--- Makefile ---
CFLAGS=-O
all: liby.a
cp: liby.a
cp liby.a /usr/lib/liby.a
liby.a: main.o yyerror.o yylex.o
ar cr liby.a main.o yyerror.o yylex.o
clean:
rm -f liby.a *.o test
test: test.o liby.a
$(CC) -n test.o liby.a -o test
--- test.y ---
%%
all:
word
|
all space word
;
word:
if
|
but
|
maybe
;
if:
'i' 'f' {
printf("if\n");
}
but:
'b' 'u' 't' {
printf("but\n");
}
maybe:
'm' 'a' 'y' 'b' 'e' {
printf("maybe\n");
}
space: aspace
|
space aspace
;
aspace: ' '
|
'\n'
;
-----------------------------------------------------------------
gopher://quux.org/ conversion by John Goerzen <
[email protected]>
of
http://communication.ucsd.edu/A-News/
This Usenet Oldnews Archive
article may be copied and distributed freely, provided:
1. There is no money collected for the text(s) of the articles.
2. The following notice remains appended to each copy:
The Usenet Oldnews Archive: Compilation Copyright (C) 1981, 1996
Bruce Jones, Henry Spencer, David Wiseman.
