Any is dead! Long live the Str!

See merge request redox-os/ion!912

Reduce more lines in checker and move some functions to `Expander`

See merge request redox-os/ion!910

Reduce lines of code in type checker

See merge request redox-os/ion!909

- rewrite the unsafe block in `expand_process` at
  `src/lib/parser/shell_expand/mod.rs` so that strings start with whitespace
  will not cause panic. Also the definition of whitespace now includes unicode
  whitespaces (so the behavior matches `split_whitespace` which is used
  in other places), and the time complexity is reduced from O(n^2) to O(n).
- add a test in example/issues.ion for this issue

Fix build breakage on aarch64 due to stale syscall refs

See merge request redox-os/ion!907

Robin Randhawa authored 6 years ago and Michael Aaron Murphy committed 6 years ago

References to the syscall crate's relibc branch broke builds of ion for
aarch64. AArch64 syscalls were added at a later point in time to the
master branch of the syscall crate. Fix things by changing the refs to
use the master branch instead.

Restart string matching if trim

Closes #852

See merge request redox-os/ion!906

Start over string matching when trim occurs, to avoid bugs with toggling strings too much.

Fix #852

Add TOOLCHAIN var to examples README

See merge request redox-os/ion!905

Coleman McFarland authored 6 years ago and Michael Aaron Murphy committed 6 years ago

To run the `run_examples.sh` script standalone, you must provide
this variable.

Remove deprecated trim_left, trim_right

See merge request redox-os/ion!903

Resolve "Out of bounds panics on map assignments"

Closes #844

See merge request redox-os/ion!904

Switch to Rust 1.31.0

Closes #847

See merge request redox-os/ion!902

Switch to 1.31.0, not 1.30.0
Set correct toolchain in CI

This is one step closer toward 1.32.0, where the 2018 edition is stable.
Mostly refactoring the imports and giving function parameters name in traits

Refactor the assignements to reduce complexity

See merge request redox-os/ion!901

Reorder the branches to extract the common patterns
Use Results to move error handling upper in the chain.
Use as much internal functions, such as `map` to reduce match nesting.
Use iterators when applicable.

Bit of refactoring for variables and assignment

See merge request redox-os/ion!900

Clippy and fmt

See merge request redox-os/ion!897

Use iterators and a helper function to implement Terminator in a clearer way (high cyclomatic complexity in previous implementation). Use an enum to detect error types to deal with them in another scope without requiring an artificial block, as well as to avoid the overhead of dealing with bitflags when not needed.
Use native iterators whenever possible, and create a custom one to keep track of the last two characters found.

Add toolchain in Makefile to remove the need to set a system-wide target toolchain but run the test against the right version

Add consistent prefix in Compile Instructions

See merge request redox-os/ion!894