Verified Commit 7c9f272e authored by Houtan Bastani's avatar Houtan Bastani
Browse files

always substitute diffs of expressions that contain leads. closes #21

parent a1c79e6a
Pipeline #938 passed with stage
in 1 minute and 52 seconds
......@@ -336,6 +336,9 @@ DataTree::AddPowerDeriv(expr_t iArg1, expr_t iArg2, int powerDerivOrder)
DataTree::AddDiff(expr_t iArg1)
if (iArg1->maxLead() > 0)
// Issue #21: always substitute diffs with lags
return AddMinus(iArg1, iArg1->decreaseLeadsLags(1));
return AddUnaryOp(UnaryOpcode::diff, iArg1);
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