Unnamed repository; edit this file 'description' to name the repository.
| -rw-r--r-- | crates/ide-assists/src/handlers/add_label_to_loop.rs | 93 | ||||
| -rw-r--r-- | crates/ide-assists/src/lib.rs | 2 |
2 files changed, 95 insertions, 0 deletions
diff --git a/crates/ide-assists/src/handlers/add_label_to_loop.rs b/crates/ide-assists/src/handlers/add_label_to_loop.rs new file mode 100644 index 0000000000..c36ce9cced --- /dev/null +++ b/crates/ide-assists/src/handlers/add_label_to_loop.rs @@ -0,0 +1,93 @@ +use ide_db::syntax_helpers::node_ext::for_each_break_and_continue_expr; +use syntax::ast::{self, AstNode, HasLoopBody}; +use syntax::T; + +use crate::{AssistContext, AssistId, AssistKind, Assists}; + +// Assist: add_lifetime_to_type +// +// Adds a new lifetime to a struct, enum or union. +// +// ``` +// struct Point { +// x: &u32, +// y: u32, +// } +// ``` +// -> +// ``` +// struct Point<'a> { +// x: &'a u32, +// y: u32, +// } +// ``` +pub(crate) fn add_label_to_loop(acc: &mut Assists, ctx: &AssistContext) -> Option<()> { + let loop_expr = ctx.find_node_at_offset::<ast::LoopExpr>()?; + let loop_body = loop_expr.loop_body().and_then(|it| it.stmt_list()); + let mut related_exprs = vec![]; + related_exprs.push(ast::Expr::LoopExpr(loop_expr.clone())); + for_each_break_and_continue_expr(loop_expr.label(), loop_body, &mut |expr| { + if let ast::Expr::BreakExpr(_) | ast::Expr::ContinueExpr(_) = expr { + related_exprs.push(expr) + } + }); + dbg!(loop_expr.syntax().text_range()); + + acc.add( + AssistId("add_label_to_loop", AssistKind::Generate), + "Add Label", + loop_expr.syntax().text_range(), + |builder| { + for expr in related_exprs { + match expr { + ast::Expr::BreakExpr(break_expr) => { + if let Some(break_token) = break_expr.break_token() { + builder.insert(break_token.text_range().end(), " 'loop") + } + }, + ast::Expr::ContinueExpr(continue_expr) => { + if let Some(continue_token) = continue_expr.continue_token() { + builder.insert(continue_token.text_range().end(), " 'loop") + } + }, + ast::Expr::LoopExpr(loop_expr) => { + if let Some(loop_token) = loop_expr.loop_token() { + builder.insert(loop_token.text_range().start(), "'loop: ") + } + }, + _ => todo!() + } + } + }, + ) +} + + +#[cfg(test)] +mod tests { + use crate::tests::check_assist; + + use super::*; + + #[test] + fn add_label() { + check_assist( + add_label_to_loop, + r#" +fn main() { + loop$0 { + break; + continue; + } +}"#, + r#" +fn main() { + 'loop: loop { + break 'loop; + continue 'loop; + } +}"#, + ); + } + +} diff --git a/crates/ide-assists/src/lib.rs b/crates/ide-assists/src/lib.rs index 94fbaff400..7b9134efb4 100644 --- a/crates/ide-assists/src/lib.rs +++ b/crates/ide-assists/src/lib.rs @@ -104,6 +104,7 @@ mod handlers { pub(crate) type Handler = fn(&mut Assists, &AssistContext) -> Option<()>; mod add_explicit_type; + mod add_label_to_loop; mod add_lifetime_to_type; mod add_missing_impl_members; mod add_turbo_fish; @@ -193,6 +194,7 @@ mod handlers { &[ // These are alphabetic for the foolish consistency add_explicit_type::add_explicit_type, + add_label_to_loop::add_label_to_loop, add_missing_match_arms::add_missing_match_arms, add_lifetime_to_type::add_lifetime_to_type, add_return_type::add_return_type, |