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Make basic use of spans for macro expansion errors

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This commit is contained in:
Lukas Wirth 2024-07-29 14:52:40 +02:00
parent 7beac14cba
commit ae9c553902
24 changed files with 392 additions and 333 deletions
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53
crates/hir-expand/src/builtin/fn_macro.rs
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@ -460,15 +460,11 @@ fn compile_error_expand(
let err = match &*tt.token_trees {
[tt::TokenTree::Leaf(tt::Leaf::Literal(tt::Literal {
symbol: text,
span: _,
span,
kind: tt::LitKind::Str | tt::LitKind::StrRaw(_),
suffix: _,
}))] =>
// FIXME: Use the span here!
{
ExpandError::other(Box::from(unescape_str(text).as_str()))
}
_ => ExpandError::other("`compile_error!` argument must be a string"),
}))] => ExpandError::other(*span, Box::from(unescape_str(text).as_str())),
_ => ExpandError::other(span, "`compile_error!` argument must be a string"),
};
ExpandResult { value: quote! {span =>}, err: Some(err) }
@ -478,7 +474,7 @@ fn concat_expand(
_db: &dyn ExpandDatabase,
_arg_id: MacroCallId,
tt: &tt::Subtree,
_: Span,
call_site: Span,
) -> ExpandResult<tt::Subtree> {
let mut err = None;
let mut text = String::new();
@ -527,7 +523,9 @@ fn concat_expand(
| tt::LitKind::ByteStrRaw(_)
| tt::LitKind::CStr
| tt::LitKind::CStrRaw(_)
| tt::LitKind::Err(_) => err = Some(ExpandError::other("unexpected literal")),
| tt::LitKind::Err(_) => {
err = Some(ExpandError::other(it.span, "unexpected literal"))
}
}
}
// handle boolean literals
@ -539,7 +537,7 @@ fn concat_expand(
}
tt::TokenTree::Leaf(tt::Leaf::Punct(punct)) if i % 2 == 1 && punct.char == ',' => (),
_ => {
err.get_or_insert(mbe::ExpandError::UnexpectedToken.into());
err.get_or_insert(ExpandError::other(call_site, "unexpected token"));
}
}
}
@ -551,7 +549,7 @@ fn concat_bytes_expand(
_db: &dyn ExpandDatabase,
_arg_id: MacroCallId,
tt: &tt::Subtree,
_: Span,
call_site: Span,
) -> ExpandResult<tt::Subtree> {
let mut bytes = String::new();
let mut err = None;
@ -585,20 +583,22 @@ fn concat_bytes_expand(
bytes.extend(text.as_str().escape_debug());
}
_ => {
err.get_or_insert(mbe::ExpandError::UnexpectedToken.into());
err.get_or_insert(ExpandError::other(*span, "unexpected token"));
break;
}
}
}
tt::TokenTree::Leaf(tt::Leaf::Punct(punct)) if i % 2 == 1 && punct.char == ',' => (),
tt::TokenTree::Subtree(tree) if tree.delimiter.kind == tt::DelimiterKind::Bracket => {
if let Err(e) = concat_bytes_expand_subtree(tree, &mut bytes, &mut record_span) {
if let Err(e) =
concat_bytes_expand_subtree(tree, &mut bytes, &mut record_span, call_site)
{
err.get_or_insert(e);
break;
}
}
_ => {
err.get_or_insert(mbe::ExpandError::UnexpectedToken.into());
err.get_or_insert(ExpandError::other(call_site, "unexpected token"));
break;
}
}
@ -623,6 +623,7 @@ fn concat_bytes_expand_subtree(
tree: &tt::Subtree,
bytes: &mut String,
mut record_span: impl FnMut(Span),
err_span: Span,
) -> Result<(), ExpandError> {
for (ti, tt) in tree.token_trees.iter().enumerate() {
match tt {
@ -650,7 +651,7 @@ fn concat_bytes_expand_subtree(
}
tt::TokenTree::Leaf(tt::Leaf::Punct(punct)) if ti % 2 == 1 && punct.char == ',' => (),
_ => {
return Err(mbe::ExpandError::UnexpectedToken.into());
return Err(ExpandError::other(err_span, "unexpected token"));
}
}
}
@ -672,7 +673,7 @@ fn concat_idents_expand(
}
tt::TokenTree::Leaf(tt::Leaf::Punct(punct)) if i % 2 == 1 && punct.char == ',' => (),
_ => {
err.get_or_insert(mbe::ExpandError::UnexpectedToken.into());
err.get_or_insert(ExpandError::other(span, "unexpected token"));
}
}
}
@ -686,16 +687,17 @@ fn relative_file(
call_id: MacroCallId,
path_str: &str,
allow_recursion: bool,
err_span: Span,
) -> Result<EditionedFileId, ExpandError> {
let lookup = call_id.lookup(db);
let call_site = lookup.kind.file_id().original_file_respecting_includes(db).file_id();
let path = AnchoredPath { anchor: call_site, path: path_str };
let res = db
.resolve_path(path)
.ok_or_else(|| ExpandError::other(format!("failed to load file `{path_str}`")))?;
.ok_or_else(|| ExpandError::other(err_span, format!("failed to load file `{path_str}`")))?;
// Prevent include itself
if res == call_site && !allow_recursion {
Err(ExpandError::other(format!("recursive inclusion of `{path_str}`")))
Err(ExpandError::other(err_span, format!("recursive inclusion of `{path_str}`")))
} else {
Ok(EditionedFileId::new(res, db.crate_graph()[lookup.krate].edition))
}
@ -727,7 +729,7 @@ fn parse_string(tt: &tt::Subtree) -> Result<(Symbol, Span), ExpandError> {
}
_ => None,
})
.ok_or(mbe::ExpandError::ConversionError.into())
.ok_or(ExpandError::other(tt.delimiter.open, "expected string literal"))
}
fn include_expand(
@ -751,7 +753,7 @@ fn include_expand(
Some(it) => ExpandResult::ok(it),
None => ExpandResult::new(
tt::Subtree::empty(DelimSpan { open: span, close: span }),
ExpandError::other("failed to parse included file"),
ExpandError::other(span, "failed to parse included file"),
),
}
}
@ -761,7 +763,7 @@ pub fn include_input_to_file_id(
arg_id: MacroCallId,
arg: &tt::Subtree,
) -> Result<EditionedFileId, ExpandError> {
relative_file(db, arg_id, parse_string(arg)?.0.as_str(), false)
relative_file(db, arg_id, parse_string(arg)?.0.as_str(), false, arg.delimiter.open)
}
fn include_bytes_expand(
@ -800,7 +802,7 @@ fn include_str_expand(
// it's unusual to `include_str!` a Rust file), but we can return an empty string.
// Ideally, we'd be able to offer a precise expansion if the user asks for macro
// expansion.
let file_id = match relative_file(db, arg_id, path.as_str(), true) {
let file_id = match relative_file(db, arg_id, path.as_str(), true, span) {
Ok(file_id) => file_id,
Err(_) => {
return ExpandResult::ok(quote!(span =>""));
@ -836,7 +838,10 @@ fn env_expand(
// The only variable rust-analyzer ever sets is `OUT_DIR`, so only diagnose that to avoid
// unnecessary diagnostics for eg. `CARGO_PKG_NAME`.
if key.as_str() == "OUT_DIR" {
err = Some(ExpandError::other(r#"`OUT_DIR` not set, enable "build scripts" to fix"#));
err = Some(ExpandError::other(
span,
r#"`OUT_DIR` not set, enable "build scripts" to fix"#,
));
}
// If the variable is unset, still return a dummy string to help type inference along.
@ -885,7 +890,7 @@ fn quote_expand(
) -> ExpandResult<tt::Subtree> {
ExpandResult::new(
tt::Subtree::empty(tt::DelimSpan { open: span, close: span }),
ExpandError::other("quote! is not implemented"),
ExpandError::other(span, "quote! is not implemented"),
)
}