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#7316 Curve Calculator: Add support for single line if-statement

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This commit is contained in:
Magne Sjaastad
2021-02-01 18:38:52 +01:00
parent 1a8f36373c
commit a060ba349e
6 changed files with 158 additions and 1 deletions
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51
ThirdParty/expressionparser/ExpressionParserImpl.cpp vendored
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@@ -18,6 +18,8 @@
#include "ExpressionParserImpl.h"
#include <QRegularExpression>
//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
@@ -123,3 +125,52 @@ QString ExpressionParserImpl::parserErrorText(parser_t& parser)
return txt;
}
//--------------------------------------------------------------------------------------------------
//
// The parser do not support single-line if statements on a vector.
// Expand a single line if-statement to a for loop over all items in the referenced
// vectors. The script will add '[i]' as postfix to all variables, assuming all variables
// to be vectors. This statement will be put in a for loop over all elements counting
// up to size of the vector with minimum items.
//
// Single line statement :
// c := if((a > 13), a, b)
//
// Intended parser script text
//
// for (var i : = 0; i < min(c[], a[], b[]); i += 1)
// {
// c[i] : = if ((a[i] > 13), a[i], b[i]);
// }
//
//--------------------------------------------------------------------------------------------------
QString ExpressionParserImpl::expandIfStatements(const QString& expressionText)
{
QString expandedText;
{
QString textWithVectorBrackets = expressionText;
QString listOfVars;
auto allVectorVariables = detectReferencedVariables(expressionText);
for (const QString& var : allVectorVariables)
{
listOfVars += QString("%1[],").arg(var);
QString regexpText = QString("\\b%1\\b").arg(var);
QRegularExpression regexp(regexpText);
QString varWithBrackets = var + "[i]";
textWithVectorBrackets = textWithVectorBrackets.replace(regexp, varWithBrackets);
}
listOfVars = listOfVars.left(listOfVars.size() - 1);
expandedText = QString("for (var i := 0; i < min(%1); i += 1)\n").arg(listOfVars);
expandedText += "{\n";
expandedText += QString(" %1;\n").arg(textWithVectorBrackets);
expandedText += "}\n";
}
return expandedText;
}