[ucd] [char] [utils] Make libraries no_std #179
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Testing `fmt::Display` under `no_std` can get too much overhead, therefore it's moved to `tests/` so it can use `std::string` and friends.
Add `std` feature, which enabled the API based on `std::collections::Bound`. Add example code that tests the library in use-std environment. (A no-std example to be added later.)
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179: [ucd] [char] [utils] Make libraries no_std r=behnam a=behnam Most of the transition was a matter of changing the namespace from `std` to `core`. * Unit tests for `Display` implementations are moved into integration tests, allowing use of `format!()` in test code. * [`char-range`] needed special attention, because of having an API using `std::collections::Bound` as input. Although the datatype is safe for core, it's part of `liballoc` APIs and therefore not available in `libcore`. Therefore, a new `std` feature is added to the package, which enables the part of the API. * [`char-range`] Feature implementations are refactored into separate files to simplify configuration conditioning. * [`char-property`] To be able to be used in `no_std` libraries, had to bring in some code for ASCII-case-insensitive char and str matching. * [`char-property`] The `char_property!()` macro now depends on the caller package to include `extern crate core;` explicitly iff it's a normal (use-std) package.
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Most of the transition was a matter of changing the namespace from
stdtocore.Unit tests for
Displayimplementations are moved into integration tests, allowing use offormat!()in test code.[
char-range] needed special attention, because of having an API usingstd::collections::Boundas input. Although the datatype is safe for core, it's part ofliballocAPIs and therefore not available inlibcore. Therefore, a newstdfeature is added to the package, which enables the part of the API.[
char-range] Feature implementations are refactored into separate files to simplify configuration conditioning.[
char-property] To be able to be used inno_stdlibraries, had to bring in some code for ASCII-case-insensitive char and str matching.[
char-property] Thechar_property!()macro now depends on the caller package to includeextern crate core;explicitly iff it's a normal (use-std) package.Tracker: #144