49 lines
1.6 KiB
Ruby
49 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-3.2.4.tar.gz"
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mirror "https://ftpmirror.gnu.org/bison/bison-3.2.4.tar.gz"
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sha256 "cb673e2298d34b5e46ba7df0641afa734da1457ce47de491863407a587eec79a"
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bottle do
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sha256 "41dc4a7c7d51d7579cccd1875cd3f683dbbdb07db47ea10d07e61d7502ebc380" => :mojave
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sha256 "66e597575145349e5acaf9ff8b1a08a8582dc0ea3e2ec80c00a99ab2b6aa9aca" => :high_sierra
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sha256 "f74574ab0ec6c7c6c5a143b0b46303752482be1d37b36c7b74c534fa7499e446" => :sierra
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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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