C++23 learning path

Reinforce toolchains, lifetimes, generic programming, ranges, coroutines, and the memory model before adopting C++23 additions.

1. Day 1Not startedToolchains and C++23 Support
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2. Day 2Not startedCMake C++23, Feature-Test Macros, and Compiler Matrices
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3. Day 3Not startedValue Categories, Lifetime, Move, and Perfect Forwarding
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4. Day 4Not startedTemplates, Concepts, CRTP, and Generic Programming
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5. Day 5Not startedRanges, Views, Iterators, and Sentinels
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6. Day 6Not startedCoroutines, RAII, Memory Model, and Concurrency
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Master if consteval, expanded constexpr, decay-copy, and the simpler implicit-move rules.

1. Day 7Not started`if consteval` and `if !consteval`
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2. Day 8Not startedC++23 `constexpr` Extensions
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3. Day 9Not startedDecay-Copy with `auto(x)` and `auto{x}`
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4. Day 10Not startedSimpler Implicit Move
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Apply explicit object parameters, new lambda forms, lifetime rules, literals, attributes, preprocessing, and C++20-to-C++23 migration strategy.

1. Day 11Not startedExplicit Object Parameters and Deducing `this`
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2. Day 12Not startedDeducing `this` with `const` and Value Categories
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3. Day 13Not startedDeducing `this` with Templates and Concepts
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4. Day 14Not startedDeducing `this` with CRTP, Mixins, and Recursive Lambdas
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5. Day 15Not startedStatic Lambdas and Static Call Operators
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6. Day 16Not startedMultidimensional Subscript Operator
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7. Day 17Not startedRange-Based `for` Lifetime Extension
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8. Day 18Not startedLambda Syntax, Attributes, and Trailing-Return Scope
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9. Day 19Not startedInherited-Constructor CTAD and Alias Init-Statements
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10. Day 20Not started`z`/`uz` Literal Suffixes and Extended Floating Types
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11. Day 21Not started`[[assume]]` and `std::unreachable`
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12. Day 22Not started`#elifdef`, `#elifndef`, and `#warning`
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13. Day 23Not startedCharacter Sets, Escapes, and `char8_t` Portability
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14. Day 24Not startedDeprecations, Compatibility, and C++20–C++23 Migration
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Build explicit error and ownership pipelines with optional, expected, move-only callables, forwarding utilities, and smart-pointer interoperability.

1. Day 25Not startedMonadic Operations on `std::optional`
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2. Day 26Not started`std::expected` and `std::unexpected`
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3. Day 27Not startedMonadic Operations and Error Pipelines with `std::expected`
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4. Day 28Not started`std::move_only_function`
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5. Day 29Not started`std::forward_like`
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6. Day 30Not started`std::invoke_r`, `std::bind_back`, and Callable Utilities
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7. Day 31Not startedEnum and Bit Utilities
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8. Day 32Not started`std::out_ptr` and `std::inout_ptr`
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9. Day 33Not startedLifetime Start, Allocation, and `constexpr` Smart Pointers
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10. Day 34Not started`std::stacktrace` and `std::source_location`
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Use print, format, spanstream, and string utilities with explicit buffer, error, and portability boundaries.

1. Day 35Not started`std::print` and `std::println`
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2. Day 36Not startedFormatting Ranges, Tuples, and Thread IDs
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3. Day 37Not started`std::spanstream` and Buffer-Based I/O
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4. Day 38Not startedString Containment and `resize_and_overwrite`
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Combine const-aware ranges, container conversion, view adaptors, and search/fold algorithms in lifetime-safe lazy pipelines.

1. Day 39Not startedConstant Iterators and Const-Aware Ranges
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2. Day 40Not started`std::ranges::to` and `std::from_range`
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3. Day 41Not startedContainer Range Operations
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4. Day 42Not started`zip`, `zip_transform`, and `enumerate` Views
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5. Day 43Not startedAdjacent, Adjacent-Transform, and Pairwise Views
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6. Day 44Not startedChunk, Slide, Chunk-By, and Stride Views
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7. Day 45Not startedJoin-With, Repeat, and Cartesian-Product Views
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8. Day 46Not started`as_const`, `as_rvalue`, and Custom Range Adaptors
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9. Day 47Not startedC++23 Range Search Algorithms
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10. Day 48Not startedFold Algorithms, `ranges::iota`, and Shift Algorithms
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Evaluate flat associative containers and model multidimensional data with mdspan extents, layouts, mappings, and accessors.

1. Day 49Not started`std::flat_map` and `std::flat_multimap`
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2. Day 50Not started`std::mdspan`, Extents, and Multidimensional Data
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3. Day 51Not started`mdspan` Layouts, Mappings, and Accessors
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Finish with coroutine generators, standard-library modules, and a bounded binary parser with explicit endianness and error contracts.

1. Day 52Not started`std::generator` and Lazy Coroutine Sequences
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2. Day 53Not startedStandard Library Modules `std` and `std.compat`
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3. Day 54Not startedBinary Feed Parsing with `span`, `byteswap`, and `expected`
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