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Displaying a more intelligent error message with invalid tokens in the
input stream. #20
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parent
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@ -158,8 +158,18 @@ public class TokenReader {
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break;
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break;
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}
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}
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default:
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default:
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throw new IOException(String.format(
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String message = String.format("Unknown or unexpected character '%c'", tokenizer.ttype);
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"Unknown! ttype=%d, nval=%f, sval=%s\n", tokenizer.ttype, tokenizer.nval, tokenizer.sval));
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if (tokenizer.ttype == StreamTokenizer.TT_WORD) {
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message = String.format("Unknown or unexpected string '%s'", tokenizer.sval);
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} else if (tokenizer.ttype == StreamTokenizer.TT_NUMBER) {
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message = String.format("Unknown or unexpected number %f", tokenizer.nval);
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} else if (tokenizer.ttype == StreamTokenizer.TT_EOF) {
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message = "Unexpected EOF";
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} else if (tokenizer.ttype == StreamTokenizer.TT_EOL) {
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message = "Unexpected EOL";
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}
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message += String.format(" found on line #%d", tokenizer.lineno());
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throw new IOException(message);
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}
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}
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}
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}
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}
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}
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