homebrew-core/Formula/bison.rb
2017-04-22 22:24:06 -07:00

51 lines
1.8 KiB
Ruby

class Bison < Formula
desc "Parser generator"
homepage "https://www.gnu.org/software/bison/"
url "https://ftp.gnu.org/gnu/bison/bison-3.0.4.tar.gz"
mirror "https://ftpmirror.gnu.org/bison/bison-3.0.4.tar.gz"
sha256 "b67fd2daae7a64b5ba862c66c07c1addb9e6b1b05c5f2049392cfd8a2172952e"
bottle do
sha256 "609cc77d6ef01c5a7afc2f96b8a27fb7fcb639b3f6192f6e0f8d2f7623cc141e" => :sierra
sha256 "17488b69156f6fc91dd438c54920751399c23745f330487abd54c4cbcb49ff6a" => :el_capitan
sha256 "0a6b72564c1602a033d814b68939bf2732f21cfdc06196c29da19c79faba669f" => :yosemite
sha256 "a3146ea90c2e4ee5d5626154b3446c7c5aea748b9239beac6ac2c26e753c830e" => :mavericks
sha256 "1ac1b43ae92fea5b04f663197309ce8b788061d31f09ba14e97dd4d5d1183d62" => :mountain_lion
end
keg_only :provided_by_osx, "Some formulae require a newer version of bison."
def install
system "./configure", "--disable-dependency-tracking",
"--prefix=#{prefix}"
system "make", "install"
end
test do
(testpath/"test.y").write <<-EOS.undent
%{ #include <iostream>
using namespace std;
extern void yyerror (char *s);
extern int yylex ();
%}
%start prog
%%
prog: // empty
| prog expr '\\n' { cout << "pass"; exit(0); }
;
expr: '(' ')'
| '(' expr ')'
| expr expr
;
%%
char c;
void yyerror (char *s) { cout << "fail"; exit(0); }
int yylex () { cin.get(c); return c; }
int main() { yyparse(); }
EOS
system "#{bin}/bison", "test.y"
system ENV.cxx, "test.tab.c", "-o", "test"
assert_equal "pass", shell_output("echo \"((()(())))()\" | ./test")
assert_equal "fail", shell_output("echo \"())\" | ./test")
end
end