diff options
| -rw-r--r-- | cli/cmd/lex.go | 11 | ||||
| -rw-r--r-- | driver/lexer.go | 1 |
2 files changed, 9 insertions, 3 deletions
diff --git a/cli/cmd/lex.go b/cli/cmd/lex.go index f47f503..3a9059f 100644 --- a/cli/cmd/lex.go +++ b/cli/cmd/lex.go @@ -13,9 +13,10 @@ import ( ) var lexFlags = struct { - debug *bool - source *string - output *string + debug *bool + source *string + output *string + breakOnError *bool }{} func init() { @@ -31,6 +32,7 @@ As use ` + "`maleeni compile`" + `, you can generate the specification.`, lexFlags.debug = cmd.Flags().BoolP("debug", "d", false, "enable logging") lexFlags.source = cmd.Flags().StringP("source", "s", "", "source file path (default: stdin)") lexFlags.output = cmd.Flags().StringP("output", "o", "", "output file path (default: stdout)") + lexFlags.breakOnError = cmd.Flags().BoolP("break-on-error", "b", false, "break lexical analysis with exit status 1 immediately when an error token appears.") rootCmd.AddCommand(cmd) } @@ -98,6 +100,9 @@ Date time: %v if err != nil { return fmt.Errorf("failed to marshal a token; token: %v, error: %v\n", tok, err) } + if tok.Invalid && *lexFlags.breakOnError { + return fmt.Errorf("detected an error token: %v", string(data)) + } fmt.Fprintf(w, "%v\n", string(data)) if tok.EOF { break diff --git a/driver/lexer.go b/driver/lexer.go index 95540f4..76f8092 100644 --- a/driver/lexer.go +++ b/driver/lexer.go @@ -90,6 +90,7 @@ func newInvalidToken(mode spec.LexModeNum, modeName spec.LexModeName, match byte ModeName: modeName, ID: 0, Match: match, + Text: string(match.ByteSlice()), Invalid: true, } } |