Changelog #19

Apr 6, 2020

New Features

BREAKING #3824 changed the name of many options. The current set is specified here. If you are using a non-VS Code client, note that rust-analyzer now asks for rust-analyzer secion of configuration, and expects this config to be present in initializationOptions.

#3804, #3825 it is now possible to use arbitrary command for on the fly error checking:

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{
    "rust-analyzer.checkOnSave.overrideCommand": [
        "./x.py", "check", "--json-output"
    ]
}

#3807, #3825 similarly, it is now possible to completely override rustfmt command.

#3820 remove support for old syntax highlighting. To use the new semantic tokens highlighting:

add

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{
    "rust-analyzer.highlighting.semanticTokens": true,
    "editor.semanticHighlighting.enabled": false,
}

to config

Rust specific tokens and modifiers are listed here. For example, to underline all mut and &mut variables, add this to settings.json:

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"editor.tokenColorCustomizationsExperimental": {
    "*.mutable": {
        "fontStyle": "underline"
    }
}

#3814 add Implement From for enum variant assist
#3746 add Create function assist.
#3840 automatically add call parenthesis for tuple-like enum variants
#3666 handle some configuration changes without server restart.
#3777 populate default task list in VS Code with cargo commands.
#3765 SSR no longer takes field order into account.
#3829 SSR treats method call and UFCS equivalently.
#3779 code completion for recrod literals now suggest only fields which are not already present.

#3785 attach doc comments to declaration even if there’s a blank line after comment.
#3781, #3819 make Run action correctly handle the case with several major versions of the package in the crate graph.
#3786 Fill Match Arms assits does not leave the floating comma behind.
#3797 don’t show chaining hints for record literals and unit structs.
#3844 make sure that default configuration values are honored.
#3857 fix inference of function pointer return types.
#3858 don’t show return type for ()-returning function.

#3817, #3815, #3816 Show Syntax Tree internal command now has syntax highlighting and auto scroll from source.
#3805, #3806, #3811 lower literal patterns.
#3790 use uniiform naming (config) for all configuration-related functionality.
#3792, #3802 inspired by Emacs, rename "cargo watch" functionality to flycheck.
#3738, #3800 more groundwork for proc-macro support.
#3793 add integrated test for code-generating build.rs.
#3795 decouple flycheck and project model.
#3809 reduce the number of structs holding configuration from three to one.
#3836 wrap macros in pattern position into ast::MacroPat node to not confuse them with expressions.
#3744 upgrade chalk.