func parse(src string, t *testing.T) *ast.Grammar {
scanner := new(scanner.Scanner)
scanner.Init([]byte(src), token.FRONTENDTokens)
parser := parser.NewParser(parser.ActionTable, parser.GotoTable, parser.ProductionsTable, token.FRONTENDTokens)
g, err := parser.Parse(scanner)
if err != nil {
t.Fatal(fmt.Sprintf("Parse error: %s\n", err))
return nil
}
return g.(*ast.Grammar)
}
func main() {
flag.Usage = usage
if cfg1, err := config.New(); err != nil {
fmt.Printf("Error reading configuration: %s\n", err)
flag.Usage()
} else {
cfg = cfg1
}
if cfg.Verbose() {
cfg.PrintParams()
}
if cfg.Help() {
flag.Usage()
}
// if *profile {
// startProfiler()
// defer pprof.StopCPUProfile()
// }
scanner := &scanner.Scanner{}
srcBuffer, err := ioutil.ReadFile(cfg.SourceFile())
if err != nil {
fmt.Println(err)
os.Exit(1)
}
scanner.Init(srcBuffer, token.FRONTENDTokens)
parser := parser.NewParser(parser.ActionTable, parser.GotoTable, parser.ProductionsTable, token.FRONTENDTokens)
grammar, err := parser.Parse(scanner)
if err != nil {
fmt.Printf("Parse error: %s\n", err)
os.Exit(1)
}
g := grammar.(*ast.Grammar)
gSymbols := symbols.NewSymbols(g)
if cfg.Verbose() {
writeTerminals(gSymbols, cfg)
}
var tokenMap *outToken.TokenMap
gSymbols.Add(g.LexPart.TokenIds()...)
g.LexPart.UpdateStringLitTokens(gSymbols.ListStringLitSymbols())
lexSets := lexItems.GetItemSets(g.LexPart)
if cfg.Verbose() {
io.WriteFileString(path.Join(cfg.OutDir(), "lexer_sets.txt"), lexSets.String())
}
tokenMap = outToken.NewTokenMap(gSymbols.ListTerminals())
if !cfg.NoLexer() {
genLexer.Gen(cfg.Package(), cfg.OutDir(), g.LexPart.Header.SDTLit, lexSets, tokenMap, cfg)
}
if g.SyntaxPart != nil {
firstSets := first.GetFirstSets(g, gSymbols)
if cfg.Verbose() {
io.WriteFileString(path.Join(cfg.OutDir(), "first.txt"), firstSets.String())
}
lr1Sets := lr1Items.GetItemSets(g, gSymbols, firstSets)
if cfg.Verbose() {
io.WriteFileString(path.Join(cfg.OutDir(), "LR1_sets.txt"), lr1Sets.String())
}
conflicts := genParser.Gen(cfg.Package(), cfg.OutDir(), g.SyntaxPart.Header.SDTLit, g.SyntaxPart.ProdList, gSymbols, lr1Sets, tokenMap, cfg)
handleConflicts(conflicts, lr1Sets.Size(), cfg, g.SyntaxPart.ProdList)
}
genToken.Gen(cfg.Package(), cfg.OutDir(), tokenMap)
genUtil.Gen(cfg.OutDir())
}