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Quickfix: Add two new refactorings for logical binary expressions.

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a op b -> !(a invop b)
and
a op b -> b flipop a
This commit is contained in:
Christian Kamm
2009-11-26 16:03:01 +01:00
parent d790712bdc
commit f1af5fb4ef
1 changed files with 158 additions and 0 deletions
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158
src/plugins/cppeditor/cppquickfix.cpp
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@@ -95,6 +95,160 @@ protected:
}
};
/*
Rewrite
a op b
As
!(a invop b)
*/
class UseInverseOp: public QuickFixOperation
{
public:
UseInverseOp()
: binary(0)
{}
virtual QString description() const
{
return QLatin1String("Rewrite using ") + replacement; // ### tr?
}
virtual int match(const QList<AST *> &path)
{
int index = path.size() - 1;
binary = path.at(index)->asBinaryExpression();
if (! binary)
return -1;
if (! isCursorOn(binary->binary_op_token))
return -1;
CPlusPlus::Kind invertToken;
switch (tokenAt(binary->binary_op_token).kind()) {
case T_LESS_EQUAL:
invertToken = T_GREATER;
break;
case T_LESS:
invertToken = T_GREATER_EQUAL;
break;
case T_GREATER:
invertToken = T_LESS_EQUAL;
break;
case T_GREATER_EQUAL:
invertToken = T_LESS;
break;
case T_EQUAL_EQUAL:
invertToken = T_EXCLAIM_EQUAL;
break;
case T_EXCLAIM_EQUAL:
invertToken = T_EQUAL_EQUAL;
break;
default:
return -1;
}
CPlusPlus::Token tok;
tok.f.kind = invertToken;
replacement = QLatin1String(tok.spell());
return index;
}
virtual void createChangeSet()
{
insert(startOf(binary), "!(");
insert(endOf(binary), ")");
replace(binary->binary_op_token, replacement);
}
private:
BinaryExpressionAST *binary;
QString replacement;
};
/*
Rewrite
a op b
As
b flipop a
*/
class FlipBinaryOp: public QuickFixOperation
{
public:
FlipBinaryOp()
: binary(0)
{}
virtual QString description() const
{
if (replacement.isEmpty())
return QLatin1String("Flip");
else
return QLatin1String("Flip to use ") + replacement; // ### tr?
}
virtual int match(const QList<AST *> &path)
{
int index = path.size() - 1;
binary = path.at(index)->asBinaryExpression();
if (! binary)
return -1;
if (! isCursorOn(binary->binary_op_token))
return -1;
CPlusPlus::Kind flipToken;
switch (tokenAt(binary->binary_op_token).kind()) {
case T_LESS_EQUAL:
flipToken = T_GREATER_EQUAL;
break;
case T_LESS:
flipToken = T_GREATER;
break;
case T_GREATER:
flipToken = T_LESS;
break;
case T_GREATER_EQUAL:
flipToken = T_LESS_EQUAL;
break;
case T_EQUAL_EQUAL:
case T_EXCLAIM_EQUAL:
case T_AMPER_AMPER:
case T_PIPE_PIPE:
flipToken = T_EOF_SYMBOL;
break;
default:
return -1;
}
if (flipToken != T_EOF_SYMBOL) {
CPlusPlus::Token tok;
tok.f.kind = flipToken;
replacement = QLatin1String(tok.spell());
}
return index;
}
virtual void createChangeSet()
{
flip(binary->left_expression, binary->right_expression);
if (! replacement.isEmpty())
replace(binary->binary_op_token, replacement);
}
private:
BinaryExpressionAST *binary;
QString replacement;
};
/*
Rewrite
!a && !b
As
!(a || b)
*/
class RewriteLogicalAndOp: public QuickFixOperation
{
public:
@@ -846,6 +1000,8 @@ int CPPQuickFixCollector::startCompletion(TextEditor::ITextEditable *editable)
QSharedPointer<MoveDeclarationOutOfWhileOp> moveDeclarationOutOfWhileOp(new MoveDeclarationOutOfWhileOp());
QSharedPointer<SplitSimpleDeclarationOp> splitSimpleDeclarationOp(new SplitSimpleDeclarationOp());
QSharedPointer<AddBracesToIfOp> addBracesToIfOp(new AddBracesToIfOp());
QSharedPointer<UseInverseOp> useInverseOp(new UseInverseOp());
QSharedPointer<FlipBinaryOp> flipBinaryOp(new FlipBinaryOp());
QList<QuickFixOperationPtr> candidates;
candidates.append(rewriteLogicalAndOp);
@@ -854,6 +1010,8 @@ int CPPQuickFixCollector::startCompletion(TextEditor::ITextEditable *editable)
candidates.append(moveDeclarationOutOfWhileOp);
candidates.append(splitSimpleDeclarationOp);
candidates.append(addBracesToIfOp);
candidates.append(useInverseOp);
candidates.append(flipBinaryOp);
QMap<int, QList<QuickFixOperationPtr> > matchedOps;