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[mypyc] feat: try constant fold in convert_format_expr_to_str - #20092
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BobTheBuidler
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Oct 20, 2025
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mypyc/irbuild/format_str_tokenizer.py
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| if is_str_rprimitive(node_type) or isinstance(x, StrExpr): | ||
| # NOTE: why does mypyc think our fake StrExprs are not str rprimitives? | ||
| var_str = builder.accept(x) | ||
| elif (folded := constant_fold_expr(builder, x)) is not None: |
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foldable non-string values can be easily converted to str
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BobTheBuidler
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Oct 20, 2025
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mypyc/irbuild/format_str_tokenizer.py
| var_str = builder.primitive_op(str_op, [builder.accept(x)], line) | ||
| elif format_op == FormatOp.INT: | ||
| if is_int_rprimitive(node_type) or is_short_int_rprimitive(node_type): | ||
| if isinstance(folded := constant_fold_expr(builder, x), int): |
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if the expr can fold as an int we can convert it to str at build time
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These tests should start working once #19982 is merged |
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This reverts commit 7345e20.
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