use hir::db::HirDatabase; use ra_syntax::{ ast::{self, AstNode}, TextUnit, SyntaxKind::{ L_PAREN, R_PAREN, L_CURLY, R_CURLY, L_BRACK, R_BRACK, EXCL }, }; use crate::{AssistCtx, Assist}; pub(crate) fn remove_dbg(ctx: AssistCtx) -> Option { let macro_call = ctx.node_at_offset::()?; if !is_valid_macrocall(macro_call, "dbg")? { return None; } let macro_range = macro_call.syntax().range(); // If the cursor is inside the macrocall, we'll try to maintain // the cursor position by subtracting the length of dbg!( from the start // of the filerange, otherwise we'll default to using the start of the macrocall let cursor_pos = { let file_range = ctx.frange.range; let offset_start = file_range .start() .checked_sub(macro_range.start()) .unwrap_or_else(|| TextUnit::from(0)); let dbg_size = TextUnit::of_str("dbg!("); if offset_start > dbg_size { file_range.start() - dbg_size } else { macro_range.start() } }; let macro_content = { let macro_args = macro_call.token_tree()?.syntax(); let range = macro_args.range(); let start = range.start() + TextUnit::of_char('('); let end = range.end() - TextUnit::of_char(')'); macro_args.text().slice(start..end).to_string() }; ctx.build("remove dbg!()", |edit| { edit.replace(macro_range, macro_content); edit.set_cursor(cursor_pos); }) } /// Verifies that the given macro_call actually matches the given name /// and contains proper ending tokens fn is_valid_macrocall(macro_call: &ast::MacroCall, macro_name: &str) -> Option { let path = macro_call.path()?; let name_ref = path.segment()?.name_ref()?; // Make sure it is actually a dbg-macrocall, dbg followed by ! let excl = path.syntax().next_sibling()?; if name_ref.text() != macro_name || excl.kind() != EXCL { return None; } let node = macro_call.token_tree()?.syntax(); let first_child = node.first_child()?; let last_child = node.last_child()?; match (first_child.kind(), last_child.kind()) { (L_PAREN, R_PAREN) | (L_BRACK, R_BRACK) | (L_CURLY, R_CURLY) => Some(true), _ => Some(false), } } #[cfg(test)] mod tests { use super::*; use crate::helpers::{check_assist, check_assist_not_applicable}; #[test] fn test_remove_dbg() { check_assist(remove_dbg, "<|>dbg!(1 + 1)", "<|>1 + 1"); check_assist(remove_dbg, "dbg!<|>((1 + 1))", "<|>(1 + 1)"); check_assist(remove_dbg, "dbg!(1 <|>+ 1)", "1 <|>+ 1"); check_assist(remove_dbg, "let _ = <|>dbg!(1 + 1)", "let _ = <|>1 + 1"); check_assist( remove_dbg, " fn foo(n: usize) { if let Some(_) = dbg!(n.<|>checked_sub(4)) { // ... } } ", " fn foo(n: usize) { if let Some(_) = n.<|>checked_sub(4) { // ... } } ", ); } #[test] fn test_remove_dbg_with_brackets_and_braces() { check_assist(remove_dbg, "dbg![<|>1 + 1]", "<|>1 + 1"); check_assist(remove_dbg, "dbg!{<|>1 + 1}", "<|>1 + 1"); } #[test] fn test_remove_dbg_not_applicable() { check_assist_not_applicable(remove_dbg, "<|>vec![1, 2, 3]"); check_assist_not_applicable(remove_dbg, "<|>dbg(5, 6, 7)"); check_assist_not_applicable(remove_dbg, "<|>dbg!(5, 6, 7"); } }