50 lines
1.6 KiB
Ruby
50 lines
1.6 KiB
Ruby
class Bison < Formula
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desc "Parser generator"
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homepage "https://www.gnu.org/software/bison/"
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url "https://ftp.gnu.org/gnu/bison/bison-3.1.tar.gz"
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mirror "https://ftpmirror.gnu.org/bison/bison-3.1.tar.gz"
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sha256 "a7cb36b55316eeec626865c03d2a44210617a17c7d393ee63d8553e0649ee946"
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bottle do
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sha256 "d12f195dfc10e7ddbe3ad79e646f43da607d1b57068b6c728e01c2029445743b" => :mojave
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sha256 "07aeea960757c9db4633f532ffa57b526a8c0ade186caae63d985474e68e643f" => :high_sierra
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sha256 "0deeabe5fe3de5d81b5940bb9f2c6a457dd6eac0a10d518c1483f618a6bef19e" => :sierra
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sha256 "99c319dc82e2a823f9c16a3909931e0970dc5cd189badb224c57a5786eb44016" => :el_capitan
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end
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keg_only :provided_by_macos, "some formulae require a newer version of bison"
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def install
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system "./configure", "--disable-dependency-tracking",
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"--prefix=#{prefix}"
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system "make", "install"
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end
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test do
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(testpath/"test.y").write <<~EOS
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%{ #include <iostream>
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using namespace std;
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extern void yyerror (char *s);
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extern int yylex ();
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%}
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%start prog
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%%
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prog: // empty
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| prog expr '\\n' { cout << "pass"; exit(0); }
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;
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expr: '(' ')'
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| '(' expr ')'
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| expr expr
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;
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%%
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char c;
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void yyerror (char *s) { cout << "fail"; exit(0); }
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int yylex () { cin.get(c); return c; }
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int main() { yyparse(); }
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EOS
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system "#{bin}/bison", "test.y"
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system ENV.cxx, "test.tab.c", "-o", "test"
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assert_equal "pass", shell_output("echo \"((()(())))()\" | ./test")
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assert_equal "fail", shell_output("echo \"())\" | ./test")
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end
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end
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