Add support for t-strings #512
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Python 3.14 introduces [t-strings][PEP750], a generalisation of f-strings which yields a processable `Template` object instead of reifying a string. The safety assumption around t-strings is that the literal parts of the template are considered "safe" and the interpolations are considered unsafe. So for markupsafe the literal parts are `Markup`-ed while the interpolations are `escape`-ed. This commit adds support for t-strings to both `Markup` and `escape`, essentially matching the handling of `__html__`. It does *not* add support for t-strings to: - `Markup.__add__` / `Markup.__radd__`, the semantics seem a bit dubious and it should be easy enough to `Markup` or `escape` the t-string / template object in that case. - `EscapeFormatter` as I'm not entirely sure whether / how a template object should interact with format specs. Fixes pallets#511 [PEP750]: https://peps.python.org/pep-0750/
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Python 3.14 introduces t-strings, a generalisation of f-strings which yields a processable
Templateobject instead of reifying a string. The safety assumption around t-strings is that the literal parts of the template are considered "safe" and the interpolations are considered unsafe. So for markupsafe the literal parts areMarkup-ed while the interpolations areescape-ed.This commit adds support for t-strings to both
Markupandescape, essentially matching the handling of__html__.It does not add support for t-strings to:
Markup.__add__/Markup.__radd__, the semantics seem a bit dubious and it should be easy enough toMarkuporescapethe t-string / template object in that case.EscapeFormatteras I'm not entirely sure whether / how a template object should interact with format specs.Fixes #511