Reads a helloworld file, parses it using goyacc and compiles it to a binary.
There are just two productions (this is meant to be simple):
helloworld ;, which will generate a "Hello, World!"helloworld "some string";, which will generate a "Hello, some string!"
The scanner discards whitespaces. Used the Go text/scanner for its simplicity. The parsed content is then transpiled to C++ and compiled into a binary using g++ (must be installed).
$ goyacc hwcompile.y && go build
$ cat prog.hw;
helloworld;
helloworld "Bonzo";
helloworld "Robert Plant";
helloworld "James Patrick Page";
helloworld "John Richard Paul Jones Baldwin";
helloworld "helloworld";
$ ./hwcompile prog.hw
$ ls -l prog.out
-rwxr-xr-x 1 rap rap 17240 Dec 9 02:57 prog.out
$ ./prog.out
Hello, World!
Hello, Bonzo!
Hello, Robert Plant!
Hello, James Patrick Page!
Hello, John Richard Paul Jones Baldwin!
Hello, helloworld!