242 lines
7.9 KiB
Rust
242 lines
7.9 KiB
Rust
use itertools::Itertools;
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use syntax::{
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ast::{self, AstNode, AstToken},
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match_ast, NodeOrToken, SyntaxElement, TextSize, T,
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};
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use crate::{AssistContext, AssistId, AssistKind, Assists};
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// Assist: remove_dbg
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//
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// Removes `dbg!()` macro call.
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//
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// ```
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// fn main() {
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// $0dbg!(92);
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// }
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// ```
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// ->
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// ```
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// fn main() {
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// 92;
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// }
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// ```
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pub(crate) fn remove_dbg(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<()> {
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let macro_call = ctx.find_node_at_offset::<ast::MacroCall>()?;
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let tt = macro_call.token_tree()?;
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let r_delim = NodeOrToken::Token(tt.right_delimiter_token()?);
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if macro_call.path()?.segment()?.name_ref()?.text() != "dbg"
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|| macro_call.excl_token().is_none()
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{
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return None;
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}
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let mac_input = tt.syntax().children_with_tokens().skip(1).take_while(|it| *it != r_delim);
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let input_expressions = mac_input.group_by(|tok| tok.kind() == T![,]);
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let input_expressions = input_expressions
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.into_iter()
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.filter_map(|(is_sep, group)| (!is_sep).then(|| group))
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.map(|mut tokens| syntax::hacks::parse_expr_from_str(&tokens.join("")))
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.collect::<Option<Vec<ast::Expr>>>()?;
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let macro_expr = ast::MacroExpr::cast(macro_call.syntax().parent()?)?;
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let parent = macro_expr.syntax().parent()?;
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let (range, text) = match &*input_expressions {
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// dbg!()
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[] => {
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match_ast! {
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match parent {
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ast::StmtList(__) => {
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let range = macro_expr.syntax().text_range();
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let range = match whitespace_start(macro_expr.syntax().prev_sibling_or_token()) {
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Some(start) => range.cover_offset(start),
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None => range,
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};
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(range, String::new())
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},
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ast::ExprStmt(it) => {
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let range = it.syntax().text_range();
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let range = match whitespace_start(it.syntax().prev_sibling_or_token()) {
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Some(start) => range.cover_offset(start),
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None => range,
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};
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(range, String::new())
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},
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_ => (macro_call.syntax().text_range(), "()".to_owned())
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}
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}
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}
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// dbg!(expr0)
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[expr] => {
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let wrap = match ast::Expr::cast(parent) {
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Some(parent) => match (expr, parent) {
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(ast::Expr::CastExpr(_), ast::Expr::CastExpr(_)) => false,
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(
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ast::Expr::BoxExpr(_) | ast::Expr::PrefixExpr(_) | ast::Expr::RefExpr(_),
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ast::Expr::AwaitExpr(_)
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| ast::Expr::CallExpr(_)
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| ast::Expr::CastExpr(_)
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| ast::Expr::FieldExpr(_)
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| ast::Expr::IndexExpr(_)
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| ast::Expr::MethodCallExpr(_)
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| ast::Expr::RangeExpr(_)
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| ast::Expr::TryExpr(_),
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) => true,
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(
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ast::Expr::BinExpr(_) | ast::Expr::CastExpr(_) | ast::Expr::RangeExpr(_),
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ast::Expr::AwaitExpr(_)
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| ast::Expr::BinExpr(_)
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| ast::Expr::CallExpr(_)
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| ast::Expr::CastExpr(_)
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| ast::Expr::FieldExpr(_)
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| ast::Expr::IndexExpr(_)
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| ast::Expr::MethodCallExpr(_)
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| ast::Expr::PrefixExpr(_)
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| ast::Expr::RangeExpr(_)
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| ast::Expr::RefExpr(_)
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| ast::Expr::TryExpr(_),
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) => true,
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_ => false,
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},
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None => false,
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};
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(
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macro_call.syntax().text_range(),
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if wrap { format!("({expr})") } else { expr.to_string() },
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)
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}
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// dbg!(expr0, expr1, ...)
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exprs => (macro_call.syntax().text_range(), format!("({})", exprs.iter().format(", "))),
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};
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acc.add(AssistId("remove_dbg", AssistKind::Refactor), "Remove dbg!()", range, |builder| {
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builder.replace(range, text);
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})
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}
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fn whitespace_start(it: Option<SyntaxElement>) -> Option<TextSize> {
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Some(it?.into_token().and_then(ast::Whitespace::cast)?.syntax().text_range().start())
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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};
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use super::*;
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fn check(ra_fixture_before: &str, ra_fixture_after: &str) {
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check_assist(
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remove_dbg,
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&format!("fn main() {{\n{ra_fixture_before}\n}}"),
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&format!("fn main() {{\n{ra_fixture_after}\n}}"),
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);
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}
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#[test]
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fn test_remove_dbg() {
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check("$0dbg!(1 + 1)", "1 + 1");
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check("dbg!$0(1 + 1)", "1 + 1");
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check("dbg!(1 $0+ 1)", "1 + 1");
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check("dbg![$01 + 1]", "1 + 1");
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check("dbg!{$01 + 1}", "1 + 1");
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}
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#[test]
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fn test_remove_dbg_not_applicable() {
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check_assist_not_applicable(remove_dbg, "fn main() {$0vec![1, 2, 3]}");
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check_assist_not_applicable(remove_dbg, "fn main() {$0dbg(5, 6, 7)}");
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check_assist_not_applicable(remove_dbg, "fn main() {$0dbg!(5, 6, 7}");
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}
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#[test]
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fn test_remove_dbg_keep_semicolon_in_let() {
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// https://github.com/rust-lang/rust-analyzer/issues/5129#issuecomment-651399779
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check(
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r#"let res = $0dbg!(1 * 20); // needless comment"#,
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r#"let res = 1 * 20; // needless comment"#,
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);
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check(r#"let res = $0dbg!(); // needless comment"#, r#"let res = (); // needless comment"#);
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check(
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r#"let res = $0dbg!(1, 2); // needless comment"#,
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r#"let res = (1, 2); // needless comment"#,
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);
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}
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#[test]
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fn test_remove_dbg_cast_cast() {
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check(r#"let res = $0dbg!(x as u32) as u32;"#, r#"let res = x as u32 as u32;"#);
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}
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#[test]
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fn test_remove_dbg_prefix() {
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check(r#"let res = $0dbg!(&result).foo();"#, r#"let res = (&result).foo();"#);
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check(r#"let res = &$0dbg!(&result);"#, r#"let res = &&result;"#);
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check(r#"let res = $0dbg!(!result) && true;"#, r#"let res = !result && true;"#);
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}
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#[test]
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fn test_remove_dbg_post_expr() {
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check(r#"let res = $0dbg!(fut.await).foo();"#, r#"let res = fut.await.foo();"#);
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check(r#"let res = $0dbg!(result?).foo();"#, r#"let res = result?.foo();"#);
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check(r#"let res = $0dbg!(foo as u32).foo();"#, r#"let res = (foo as u32).foo();"#);
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check(r#"let res = $0dbg!(array[3]).foo();"#, r#"let res = array[3].foo();"#);
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check(r#"let res = $0dbg!(tuple.3).foo();"#, r#"let res = tuple.3.foo();"#);
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}
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#[test]
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fn test_remove_dbg_range_expr() {
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check(r#"let res = $0dbg!(foo..bar).foo();"#, r#"let res = (foo..bar).foo();"#);
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check(r#"let res = $0dbg!(foo..=bar).foo();"#, r#"let res = (foo..=bar).foo();"#);
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}
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#[test]
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fn test_remove_empty_dbg() {
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check_assist(remove_dbg, r#"fn foo() { $0dbg!(); }"#, r#"fn foo() { }"#);
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check_assist(
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remove_dbg,
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r#"
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fn foo() {
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$0dbg!();
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}
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"#,
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r#"
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fn foo() {
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}
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"#,
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);
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check_assist(
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remove_dbg,
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r#"
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fn foo() {
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let test = $0dbg!();
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}"#,
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r#"
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fn foo() {
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let test = ();
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}"#,
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);
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check_assist(
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remove_dbg,
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r#"
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fn foo() {
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let t = {
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println!("Hello, world");
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$0dbg!()
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};
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}"#,
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r#"
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fn foo() {
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let t = {
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println!("Hello, world");
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};
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}"#,
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);
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}
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#[test]
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fn test_remove_multi_dbg() {
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check(r#"$0dbg!(0, 1)"#, r#"(0, 1)"#);
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check(r#"$0dbg!(0, (1, 2))"#, r#"(0, (1, 2))"#);
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}
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}
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