This new release increases compatibility with jinja language, add support for more rust expressions in the templates. Take a look at the book for the migration guide.

(❗ = breaking change)

• ❗Add support for let blocks by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/697

• Implement compound assignments (e.g. {% mut a += 1 %}) by @Kijewski in https://github.com/askama-rs/askama/pull/685

• Add support for tuple, array and slice in type generics by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/721

• Add support for macro args type annotations by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/722

• Add support for caller() in variable declaration by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/724

• Add glob support for dirs in config file by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/731

• Fix jinja macro arguments handling by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/709
• parser: reject non-ASCII characters in byte literals by @Kijewski in https://github.com/askama-rs/askama/pull/694
• parser: reject syntaxes that could cause catastrophic backtracking by @Kijewski in https://github.com/askama-rs/askama/pull/695
• derive: make sure the size_hint is collected by @Kijewski in https://github.com/askama-rs/askama/pull/700
• Fix build determinism and macro path management by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/710
• Correctly handle non-ident item in block error by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/717
• Fix compiler error with recursive types on recursive templates by using dyn instead of plain generic bounds by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/726
• Fix print = "code" by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/729
• Switch to std::path::absolute to avoid symlinking template paths by @kaepr in https://github.com/askama-rs/askama/pull/720
• Fix askama template when called from within a macro in a different crate by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/728

• ❗Turn duplicated block warning into an error by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/711

• Greatly speed up nested array parsing by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/702

• Add custom escaper example by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/725
• Improve documentation for config by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/732
• Document when Template trait methods can return Err by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/730

• Limit recursions for Ty generics by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/723
• Add regression test for temporary refs for #661 by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/688
• Add complex-expression benchmark by @Kijewski in https://github.com/askama-rs/askama/pull/691
• Simplify Cargo.toml files by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/696
• Clean compound implementation by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/699
• Update rand+rand_xoshiro dev-dependencies by @Kijewski in https://github.com/askama-rs/askama/pull/701
• Upgrade winnow to 1.0 by @jplatte in https://github.com/askama-rs/askama/pull/715
• Remove unnecessary .clone() by @jplatte in https://github.com/askama-rs/askama/pull/716
• Remove unused lifetime parameter on SyntaxAndCache by @jplatte in https://github.com/askama-rs/askama/pull/714
• Correctly handle non-ident item in block error by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/717
• Update trybuild version to 1.0.116 to enforce diagnostics width by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/718

• @jplatte made their first contribution in https://github.com/askama-rs/askama/pull/715
• @kaepr made their first contribution in https://github.com/askama-rs/askama/pull/720

Full Changelog: https://github.com/askama-rs/askama/compare/v0.15.4...v0.16.0

• Correctly handle non-ident item in block error by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/717
• Remove unnecessary .clone() by @jplatte in https://github.com/askama-rs/askama/pull/716
• Remove unused lifetime parameter on SyntaxAndCache by @jplatte in https://github.com/askama-rs/askama/pull/714
• Upgrade winnow to 1.0 by @jplatte in https://github.com/askama-rs/askama/pull/715

Full Changelog: https://github.com/askama-rs/askama/compare/v0.15.5...v0.15.6

• parser: reject non-ASCII characters in byte literals by @Kijewski in https://github.com/askama-rs/askama/pull/694
• parser: reject syntaxes that could cause catastrophic backtracking by @Kijewski in https://github.com/askama-rs/askama/pull/695
• Fix jinja macro arguments handling by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/709
• Fix build determinism and macro path management by @GuillaumeGomez and @cgundy in https://github.com/askama-rs/askama/pull/710

Full Changelog: https://github.com/askama-rs/askama/compare/v0.15.4...v0.15.5

• Improve function call handling by @Kijewski in https://github.com/askama-rs/askama/pull/684
• Correctly handle temporary references by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/686

Full Changelog: https://github.com/askama-rs/askama/compare/v0.15.3...v0.15.4

• Update book links (askama.rs) by @Kijewski in https://github.com/askama-rs/askama/pull/678
• Fix invalid variable parsing by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/680

Full Changelog: https://github.com/askama-rs/askama/compare/v0.15.2...v0.15.3

• Correctly handle local variables in extends blocks by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/670
• Better spans for #[filter_fn] by @Kijewski in https://github.com/askama-rs/askama/pull/655
• Remove mentions of salvo by @Kijewski in https://github.com/askama-rs/askama/pull/659
• Add missing information in the Upgrading to new versions chapter in the askama book by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/665
• Fix invalid block call warnings coming from extends by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/666
• Update duplicated blocks warning message and add warning about not compiling starting next version by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/669
• derive: allow where bounds in #[filter_fn] by @Kijewski in https://github.com/askama-rs/askama/pull/672
• [Book] Improve filters chapter by @Tirka in https://github.com/askama-rs/askama/pull/673
• [Book] Use more current markdown syntax for fragment links by @Kijewski in https://github.com/askama-rs/askama/pull/658
• [Book] Improve filters chapter examples (by making us of defined_or filter) by @Tirka in https://github.com/askama-rs/askama/pull/675

• @Tirka made their first contribution in https://github.com/askama-rs/askama/pull/673

Full Changelog: https://github.com/askama-rs/askama/compare/v0.15.1...v0.15.2

• Fix broken intra-doc links by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/645
• Fix missing mutability information in generated filters by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/646
• Fix clippy false positives by using call_site for code generated by the derive proc-macro by @sehnryr in https://github.com/askama-rs/askama/pull/647
• Add support for lifetimes in filters by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/649

• @sehnryr made their first contribution in https://github.com/askama-rs/askama/pull/647

Full Changelog: https://github.com/askama-rs/askama/compare/v0.15.0...v0.15.1

The main breaking change is about custom filters, they now require the filter_fn attribute. More information about it in the askama book.

(❗ = breaking change)

• ❗ add caller pattern from jinja❗ by @pollend in https://github.com/askama-rs/askama/pull/422
• ❗Add new reject filter❗ by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/430
• ❗Treat caller() as variable with support for aliasing❗ by @seijikun in https://github.com/askama-rs/askama/pull/510
• ❗Add filters |default, |assigned_or and |defined_or❗ by @Kijewski in https://github.com/askama-rs/askama/pull/425
• ❗Update minimum supported rust version to 1.88❗ by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/523
• ❗Add askama::filter_fn proc-macro for custom filters with named/optional arg support❗ by @seijikun in https://github.com/askama-rs/askama/pull/545
• Implement enum variants by @Kijewski in https://github.com/askama-rs/askama/pull/255
• Allow filters with explicit path by @Kijewski in https://github.com/askama-rs/askama/pull/435
• Add support for mutable variables by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/462
• Add support for macro default value generics by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/522
• Add support for expression-call syntax for macros by @seijikun in https://github.com/askama-rs/askama/pull/518
• Implement #531: Allow named arguments in call expr macro invocations by @seijikun in https://github.com/askama-rs/askama/pull/533
• Add support for array repeat syntax: [<element_expr>; <cnt_expr>] by @seijikun in https://github.com/askama-rs/askama/pull/626
• Add support for struct expressions by @VojtaStanek in https://github.com/askama-rs/askama/pull/602
• format non base 10 numbers at compile time by @tdelabro in https://github.com/askama-rs/askama/pull/620
• Add new tag to declare variable without value by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/613

Improve error location to give better errors:

• Greatly improve error messages on nightly by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/525
• Generate a TokenStream rather than a String by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/558
• parser: use LocatingSlice<&str> instead of &str by @Kijewski in https://github.com/askama-rs/askama/pull/560
• Use Parser::[with_]span() to get byte range and use byte range for proc_macro::Span by @Kijewski in https://github.com/askama-rs/askama/pull/571

• ❗ filesizeformat with proper accuracy❗ by @seijikun in https://github.com/askama-rs/askama/pull/568
• Filters linebreaks, paragraphbreaks and linebreaksbr only need core by @Kijewski in https://github.com/askama-rs/askama/pull/486
• Emit an error if an extends block doesn't come first in a template by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/584

• Fix tiny wording error in "Calling functions" docs by @m4tx in https://github.com/askama-rs/askama/pull/423
• book: complete note about filter change by @martinetd in https://github.com/askama-rs/askama/pull/453
• Update ref documentation by @sinder38 in https://github.com/askama-rs/askama/pull/456
• Update performance.md by @zamazan4ik in https://github.com/askama-rs/askama/pull/188
• book: document all crates on readthedocs by @Kijewski in https://github.com/askama-rs/askama/pull/473
• Fixed typos in template syntax book docs in https://github.com/askama-rs/askama/pull/494
• book: update mdbook version and highlight jinja blocks by @Kijewski in https://github.com/askama-rs/askama/pull/544
• Improve documentation by @seijikun in https://github.com/askama-rs/askama/pull/554
• Minor documentation fixes by @seijikun in https://github.com/askama-rs/askama/pull/555
• Fix some code examples annotations by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/577
• Add missing documentation about for loop features by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/576
• book: add question mark operator by @VojtaStanek in https://github.com/askama-rs/askama/pull/601
• book: add syntax summary by @VojtaStanek in https://github.com/askama-rs/askama/pull/603
• book: fix rust-docs on readthedocs by @Kijewski in https://github.com/askama-rs/askama/pull/528

• Add tests for jinja examples in our book by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/574
• Make code generator re-usable for other projects by @Kijewski in https://github.com/askama-rs/askama/pull/434
• parser: simplify {# comment #} parsing by @Kijewski in https://github.com/askama-rs/askama/pull/488
• Rename Expr::Attr into Expr::AssociatedItem by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/499
• parser: introduce more types for Expr variants by @Kijewski in https://github.com/askama-rs/askama/pull/498
• parser: refactor |filter and {% filter %} parsing by @Kijewski in https://github.com/askama-rs/askama/pull/500
• Use if-let-chains by @Kijewski in https://github.com/askama-rs/askama/pull/527
• derive: more if-let by @Kijewski in https://github.com/askama-rs/askama/pull/532
• derive: dedupe visit custom filters code by @Kijewski in https://github.com/askama-rs/askama/pull/470

• Add missing #[inline] annotations by @Kijewski in https://github.com/askama-rs/askama/pull/421
• parser: un-inline error message generation by @Kijewski in https://github.com/askama-rs/askama/pull/501
• Refactor indent Filter Implementation by @strickczq in https://github.com/askama-rs/askama/pull/466
• Make wordcount filter work with core only by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/480
• derive: un-inline Expr::Call handling for {{ expressions }} and remove parentheses by @Kijewski in https://github.com/askama-rs/askama/pull/540
• parser/derive: replaces usages of Expr/Node with Box<Expr>/Box<Node> by @Kijewski in https://github.com/askama-rs/askama/pull/542
• parser: remove one indirection in punction() finding by @Kijewski in https://github.com/askama-rs/askama/pull/543
• filter_fn: Aggressive inlining for builder invocation methods by @seijikun in https://github.com/askama-rs/askama/pull/616
• loop.first is known by being at index == 0 by @Kijewski in https://github.com/askama-rs/askama/pull/436

• generator: remove invisible group from output by @Kijewski in https://github.com/askama-rs/askama/pull/419
• Relax Sized constraint on impl FastWritable for Cow by @C0D3-M4513R in https://github.com/askama-rs/askama/pull/432
• Ignore fuzzing corpus from source line count by @Kijewski in https://github.com/askama-rs/askama/pull/433
• Use unicode-ident to determine what is an identifier by @Kijewski in https://github.com/askama-rs/askama/pull/443
• derive: prefix more generated variables with __askama by @Kijewski in https://github.com/askama-rs/askama/pull/444
• derive: don't suppress fatal errors in integer parsing by @Kijewski in https://github.com/askama-rs/askama/pull/448
• Print invalid generated code during panic by @Kijewski in https://github.com/askama-rs/askama/pull/446
• Prevent crate to be used as identifier by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/450
• Comparison operators cannot be chained by @Kijewski in https://github.com/askama-rs/askama/pull/457
• Correctly escape and reject macro names by @Kijewski in https://github.com/askama-rs/askama/pull/460
• parser: macro calls need proper tokens by @Kijewski in https://github.com/askama-rs/askama/pull/468
• Resolve with macro with call after caller by @pollend in https://github.com/askama-rs/askama/pull/469
• parser: recognize/reject prefixed ids and lits in macro calls by @Kijewski in https://github.com/askama-rs/askama/pull/476
• parser: reject illegal string literals by @Kijewski in https://github.com/askama-rs/askama/pull/479
• Rename LoopItem::index to LoopItem::index0 by @Kijewski in https://github.com/askama-rs/askama/pull/481
• parser: reject isolated CRs in string literals by @Kijewski in https://github.com/askama-rs/askama/pull/483
• parser: better error message for bare CRs by @Kijewski in https://github.com/askama-rs/askama/pull/485
• parser: U+10FFFF is the highest Unicode codepoint by @Kijewski in https://github.com/askama-rs/askama/pull/484
• parser: recognize comments in macro calls by @Kijewski in https://github.com/askama-rs/askama/pull/487
• parser: implement {% raw %} and Lit::parse() without skip_till by @Kijewski in https://github.com/askama-rs/askama/pull/489
• parser: fix {% raw %} for delimiters starting with - by @Kijewski in https://github.com/askama-rs/askama/pull/491
• parser: string literal must not be immediately followed by suffix# by @Kijewski in https://github.com/askama-rs/askama/pull/496
• parser: reject illegal raw identifiers in attribute access & ensure valid paths in generics by @Kijewski in https://github.com/askama-rs/askama/pull/497
• parser: understand nested block comments in macro calls by @Kijewski in https://github.com/askama-rs/askama/pull/504
• Fix panic when using include in call block by @seijikun in https://github.com/askama-rs/askama/pull/516
• parser: fix check_expr() recursion by @Kijewski in https://github.com/askama-rs/askama/pull/519
• parser: reject isolated CR in macro inputs, too by @Kijewski in https://github.com/askama-rs/askama/pull/524
• parser: reject bare CR in doc comments by @Kijewski in https://github.com/askama-rs/askama/pull/526
• Fix fuzzing macro argument parsing bug by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/530
• derive: make EvaluatedResult know its unknown result by @Kijewski in https://github.com/askama-rs/askama/pull/538
• parser: un-inline more error messages by @Kijewski in https://github.com/askama-rs/askama/pull/539
• parser: fail on unterminated byte literal by @Kijewski in https://github.com/askama-rs/askama/pull/547
• derive: track included files with relative path by @Kijewski in https://github.com/askama-rs/askama/pull/546
• parser: r#self is not a valid raw identifier in macro calls by @Kijewski in https://github.com/askama-rs/askama/pull/553
• parser/derive: use only one hasher throughout the proc_macro by @Kijewski in https://github.com/askama-rs/askama/pull/557
• Fix wrong span context for askama variables by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/565
• Fix invalid handling of paths starting with :: by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/569
• README: fix a link, include readmes in lib.rs by @Kijewski in https://github.com/askama-rs/askama/pull/573
• Fix wrong macro argument parsing by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/570
• parser: r#_ is not a valid identifier by @Kijewski in https://github.com/askama-rs/askama/pull/579
• parser: reject unclosed prefixed string by @Kijewski in https://github.com/askama-rs/askama/pull/582
• Emit warnings if duplicated block calls are done by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/580
• Fix block duplication warning by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/586
• Fix wrong parsing of number if digit does not match base by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/600
• Fix formatting of safe filter in template_syntax.md by @FalkWoldmann in https://github.com/askama-rs/askama/pull/587
• Limit maximum number of references in generics to prevent syn stack overflow by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/611
• Fix nested includes not handled properly by @fbilhaut in https://github.com/askama-rs/askama/pull/619
• filter_fn: Further improve invalid invocation compile error messages by @seijikun in https://github.com/askama-rs/askama/pull/614
• Fix method call on enum variant templates by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/635

• @C0D3-M4513R made their first contribution in https://github.com/askama-rs/askama/pull/432
• @martinetd made their first contribution in https://github.com/askama-rs/askama/pull/453
• @pollend made their first contribution in https://github.com/askama-rs/askama/pull/422
• @sinder38 made their first contribution in https://github.com/askama-rs/askama/pull/456
• @zamazan4ik made their first contribution in https://github.com/askama-rs/askama/pull/188
• @seijikun made their first contribution in https://github.com/askama-rs/askama/pull/516
• @VojtaStanek made their first contribution in https://github.com/askama-rs/askama/pull/601
• @FalkWoldmann made their first contribution in https://github.com/askama-rs/askama/pull/587
• @fbilhaut made their first contribution in https://github.com/askama-rs/askama/pull/619
• @tdelabro made their first contribution in https://github.com/askama-rs/askama/pull/620
• @bwcii made their first contribution in https://github.com/askama-rs/askama/pull/630

Full Changelog: https://github.com/askama-rs/askama/compare/v0.14.0...v0.15.0

• Implement Values on tuple by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/391
• Pass variables to sub-templates more reliably even if indirectly by @Kijewski in https://github.com/askama-rs/askama/pull/397
• Implement first and blank arguments for |indent by @Kijewski in https://github.com/askama-rs/askama/pull/401
• Add named arguments for builtin filters by @Kijewski in https://github.com/askama-rs/askama/pull/403
• Add unique filter by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/405

• askama_derive accidentally exposed as a feature by @Kijewski in https://github.com/askama-rs/askama/pull/384
• Track config files by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/385
• If using local variable as value when creating a new variable, do not put it behind a reference by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/392
• generator: make CARGO_MANIFEST_DIR part of ConfigKey by @strickczq in https://github.com/askama-rs/askama/pull/395
• Do not put question mark initialization expressions behind a reference by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/400
• Update to more current rust version on readthedocs by @Kijewski in https://github.com/askama-rs/askama/pull/410
• Fix unique filter implementation by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/417
• Add |titlecase as alias for |title by @Kijewski in https://github.com/askama-rs/askama/pull/416

• book: add page about FastWritable by @Kijewski in https://github.com/askama-rs/askama/pull/407
• Add throughput to derive benchmark by @Kijewski in https://github.com/askama-rs/askama/pull/413
• Move FastWritable into askama root by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/411

• @strickczq made their first contribution in https://github.com/askama-rs/askama/pull/395

Full Changelog: https://github.com/askama-rs/askama/compare/v0.13.0...v0.14.0

• askama_derive accidentally exposed as a feature by @Kijewski in https://github.com/askama-rs/askama/pull/384
• Track config files by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/385
• Implement Values on tuple by @GuillaumeGomez in https://github.com/askama-rs/askama/pull/391
• generator: make CARGO_MANIFEST_DIR part of ConfigKey by @strickczq in https://github.com/askama-rs/askama/pull/395

• @strickczq made their first contribution in https://github.com/askama-rs/askama/pull/395

Full Changelog: https://github.com/askama-rs/askama/compare/v0.13.0...v0.13.1