good first issue
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Descrizione
The DAPHNE compiler can evaluate various operations on constant scalars at compile-time. The respective constant folding implementations can be found in src/ir/daphneir/Fold.cpp. While casts of scalars between various value types can already be folded (see mlir::OpFoldResult mlir::daphne::CastOp::fold(FoldAdaptor adaptor)), casts from numbers to strings are not folded yet. Folding such casts would be useful as it would allow DaphneDSL users to do things like:
X = readMatrix("path/to/file/dataset_" + 123 + ".csv";
Which is currently not possible as the file name cannot be resolved at compile-time.