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Stubbed out method for retokenizing negative numbers

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This commit is contained in:
Mark Long 2016-10-24 22:52:27 -05:00
parent f3c2a85b36
commit 171f8d5959
2 changed files with 34 additions and 2 deletions
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32
src/applesoftfile/applesoftfile.cxx
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@ -106,6 +106,7 @@ void Retokenizer::retokenize(ApplesoftLine &line)
line.tokens = retokenizeDataStatements(line.tokens);
line.tokens = retokenizeVariables(line.tokens);
line.tokens = retokenizeNumbers(line.tokens);
line.tokens = retokenizeNegativeNumbers(line.tokens);
}
@ -398,5 +399,36 @@ QVector<ApplesoftToken> Retokenizer::retokenizeNumbers(QVector<ApplesoftToken>&d
}
datatokens = tmptokens.toVector();
return datatokens;
}
QVector<ApplesoftToken> Retokenizer::retokenizeNegativeNumbers(QVector<ApplesoftToken>&datatokens)
{
//TODO: Code to make determination of negative numbers vs. unary minus/math formulas.
// Prefixed '-' tokens for negative numbers should get merged with the integer value token.
// So, need to determine when we're in an expression vs when we're starting a number.
//
// A = -1 should retokenize.
// A = - 4 - 1 should retokenize -4
// A = - 4 - - 1 should retokenize -4 and -1
// A = 3 - 1 shoud not retokenize
// A = A - 1 should not
// A = PEEK(123) - 5 should not
// A = 4 * - 1 should
// A = (1 + 2) - 4 should not
// A = (1 + 2) + - 4 should
// A = (1 + 2) - - 4 should
// POKE - 4, 1 should
// PRINT + - 4 should
// PRINT - 4 should
// PRINT + + + - - - 4 should retokenize the last -4.
// A = 1 - - 4 should
// A = 1 - - - 4 should, probably, but it's errorprone to say the least,
// as are any multiple arbitrary +/-'s. Have to hope for the best here.
// Best bet would be to look at how AppleSoft handles these values.
// A = - 0 is the same as 0
return datatokens;
}

4
src/applesoftfile/applesoftfile.h
View File

@ -31,14 +31,13 @@ private:
QVector<ApplesoftLine> m_lines;
int m_data_end;
quint16 m_length;
friend class Retokenizer;
};
class Retokenizer {
public:
static void retokenize(ApplesoftLine &line);
protected:
private:
static QVector<ApplesoftToken> retokenizeRems(QVector<ApplesoftToken> &datatokens);
static QVector<ApplesoftToken> retokenizeStrings(QVector<ApplesoftToken> &datatokens);
@ -46,6 +45,7 @@ private:
static QVector<ApplesoftToken> processDataPayload(QVector<ApplesoftToken> &datatokens);
static QVector<ApplesoftToken> retokenizeVariables(QVector<ApplesoftToken> &datatokens);
static QVector<ApplesoftToken> retokenizeNumbers(QVector<ApplesoftToken> &datatokens);
static QVector<ApplesoftToken> retokenizeNegativeNumbers(QVector<ApplesoftToken> &datatokens);
};