func main() {
if len(os.Args) < 4 {
fmt.Printf("usage: ./main grammar_file program_file\n")
os.Exit(1)
}
gmr, err := ioutil.ReadFile(os.Args[1])
if err != nil {
fmt.Printf("'%s' is not a valid file name\n", os.Args[1])
}
pgm, err := ioutil.ReadFile(os.Args[2])
if err != nil {
fmt.Printf("'%s' is not a valid file name\n", os.Args[1])
}
// the file for writing
dst, _ := os.Create(os.Args[3])
writer := bufio.NewWriter(dst)
defer dst.Close()
// First file should be the grammar, second is the file being parsed
gmrReader := bytes.NewReader(gmr)
pgmReader := bytes.NewReader(pgm)
// Get the grammar from the analyzer
a := compiler.Analyzer{Reader: *gmrReader}
grammar := a.ReadGrammar()
// Create a generator, necessary for table
g := compiler.Generator{Grammar: grammar}
// Setup the parser
p := compiler.Parser{Grammar: a.ReadGrammar(), Reader: *pgmReader, Writer: *writer}
p.Scanner = compiler.Scanner{Reader: *pgmReader}
p.Table = g.GetTable()
p.Compiler()
}
