83 lines
2.1 KiB
Rust
83 lines
2.1 KiB
Rust
use syntax::{ast, AstNode, T};
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use crate::{AssistContext, AssistId, AssistKind, Assists};
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// Assist: split_import
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//
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// Wraps the tail of import into braces.
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//
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// ```
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// use std::$0collections::HashMap;
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// ```
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// ->
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// ```
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// use std::{collections::HashMap};
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// ```
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pub(crate) fn split_import(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
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let colon_colon = ctx.find_token_syntax_at_offset(T![::])?;
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let path = ast::Path::cast(colon_colon.parent()?)?.qualifier()?;
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let use_tree = path.top_path().syntax().ancestors().find_map(ast::UseTree::cast)?;
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let has_errors = use_tree
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.syntax()
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.descendants_with_tokens()
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.any(|it| it.kind() == syntax::SyntaxKind::ERROR);
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let last_segment = use_tree.path().and_then(|it| it.segment());
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if has_errors || last_segment.is_none() {
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return None;
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}
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let target = colon_colon.text_range();
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acc.add(AssistId("split_import", AssistKind::RefactorRewrite), "Split import", target, |edit| {
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let use_tree = edit.make_mut(use_tree.clone());
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let path = edit.make_mut(path);
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use_tree.split_prefix(&path);
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})
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}
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#[cfg(test)]
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mod tests {
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use crate::tests::{check_assist, check_assist_not_applicable, check_assist_target};
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use super::*;
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#[test]
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fn test_split_import() {
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check_assist(
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split_import,
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"use crate::$0db::RootDatabase;",
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"use crate::{db::RootDatabase};",
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)
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}
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#[test]
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fn split_import_works_with_trees() {
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check_assist(
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split_import,
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"use crate:$0:db::{RootDatabase, FileSymbol}",
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"use crate::{db::{RootDatabase, FileSymbol}}",
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)
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}
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#[test]
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fn split_import_target() {
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check_assist_target(split_import, "use crate::$0db::{RootDatabase, FileSymbol}", "::");
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}
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#[test]
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fn issue4044() {
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check_assist_not_applicable(split_import, "use crate::$0:::self;")
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}
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#[test]
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fn test_empty_use() {
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check_assist_not_applicable(
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split_import,
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r"
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use std::$0
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fn main() {}",
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);
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}
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}
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