3 /// An enum representing a diagnostic level.
4 #[unstable(feature = "proc_macro_diagnostic", issue = "54140")]
5 #[derive(Copy, Clone, Debug)]
18 /// Trait implemented by types that can be converted into a set of `Span`s.
19 #[unstable(feature = "proc_macro_diagnostic", issue = "54140")]
21 /// Converts `self` into a `Vec<Span>`.
22 fn into_spans(self) -> Vec<Span>;
25 #[unstable(feature = "proc_macro_diagnostic", issue = "54140")]
26 impl MultiSpan for Span {
27 fn into_spans(self) -> Vec<Span> {
32 #[unstable(feature = "proc_macro_diagnostic", issue = "54140")]
33 impl MultiSpan for Vec<Span> {
34 fn into_spans(self) -> Vec<Span> {
39 #[unstable(feature = "proc_macro_diagnostic", issue = "54140")]
40 impl<'a> MultiSpan for &'a [Span] {
41 fn into_spans(self) -> Vec<Span> {
46 /// A structure representing a diagnostic message and associated children
48 #[unstable(feature = "proc_macro_diagnostic", issue = "54140")]
49 #[derive(Clone, Debug)]
50 pub struct Diagnostic {
54 children: Vec<Diagnostic>,
57 macro_rules! diagnostic_child_methods {
58 ($spanned:ident, $regular:ident, $level:expr) => (
59 /// Adds a new child diagnostic message to `self` with the level
60 /// identified by this method's name with the given `spans` and
62 #[unstable(feature = "proc_macro_diagnostic", issue = "54140")]
63 pub fn $spanned<S, T>(mut self, spans: S, message: T) -> Diagnostic
64 where S: MultiSpan, T: Into<String>
66 self.children.push(Diagnostic::spanned(spans, $level, message));
70 /// Adds a new child diagnostic message to `self` with the level
71 /// identified by this method's name with the given `message`.
72 #[unstable(feature = "proc_macro_diagnostic", issue = "54140")]
73 pub fn $regular<T: Into<String>>(mut self, message: T) -> Diagnostic {
74 self.children.push(Diagnostic::new($level, message));
80 /// Iterator over the children diagnostics of a `Diagnostic`.
81 #[derive(Debug, Clone)]
82 #[unstable(feature = "proc_macro_diagnostic", issue = "54140")]
83 pub struct Children<'a>(std::slice::Iter<'a, Diagnostic>);
85 #[unstable(feature = "proc_macro_diagnostic", issue = "54140")]
86 impl<'a> Iterator for Children<'a> {
87 type Item = &'a Diagnostic;
89 fn next(&mut self) -> Option<Self::Item> {
94 #[unstable(feature = "proc_macro_diagnostic", issue = "54140")]
96 /// Creates a new diagnostic with the given `level` and `message`.
97 #[unstable(feature = "proc_macro_diagnostic", issue = "54140")]
98 pub fn new<T: Into<String>>(level: Level, message: T) -> Diagnostic {
99 Diagnostic { level: level, message: message.into(), spans: vec![], children: vec![] }
102 /// Creates a new diagnostic with the given `level` and `message` pointing to
103 /// the given set of `spans`.
104 #[unstable(feature = "proc_macro_diagnostic", issue = "54140")]
105 pub fn spanned<S, T>(spans: S, level: Level, message: T) -> Diagnostic
112 message: message.into(),
113 spans: spans.into_spans(),
118 diagnostic_child_methods!(span_error, error, Level::Error);
119 diagnostic_child_methods!(span_warning, warning, Level::Warning);
120 diagnostic_child_methods!(span_note, note, Level::Note);
121 diagnostic_child_methods!(span_help, help, Level::Help);
123 /// Returns the diagnostic `level` for `self`.
124 #[unstable(feature = "proc_macro_diagnostic", issue = "54140")]
125 pub fn level(&self) -> Level {
129 /// Sets the level in `self` to `level`.
130 #[unstable(feature = "proc_macro_diagnostic", issue = "54140")]
131 pub fn set_level(&mut self, level: Level) {
135 /// Returns the message in `self`.
136 #[unstable(feature = "proc_macro_diagnostic", issue = "54140")]
137 pub fn message(&self) -> &str {
141 /// Sets the message in `self` to `message`.
142 #[unstable(feature = "proc_macro_diagnostic", issue = "54140")]
143 pub fn set_message<T: Into<String>>(&mut self, message: T) {
144 self.message = message.into();
147 /// Returns the `Span`s in `self`.
148 #[unstable(feature = "proc_macro_diagnostic", issue = "54140")]
149 pub fn spans(&self) -> &[Span] {
153 /// Sets the `Span`s in `self` to `spans`.
154 #[unstable(feature = "proc_macro_diagnostic", issue = "54140")]
155 pub fn set_spans<S: MultiSpan>(&mut self, spans: S) {
156 self.spans = spans.into_spans();
159 /// Returns an iterator over the children diagnostics of `self`.
160 #[unstable(feature = "proc_macro_diagnostic", issue = "54140")]
161 pub fn children(&self) -> Children<'_> {
162 Children(self.children.iter())
165 /// Emit the diagnostic.
166 #[unstable(feature = "proc_macro_diagnostic", issue = "54140")]
168 fn to_internal(spans: Vec<Span>) -> crate::bridge::client::MultiSpan {
169 let mut multi_span = crate::bridge::client::MultiSpan::new();
171 multi_span.push(span.0);
176 let mut diag = crate::bridge::client::Diagnostic::new(
179 to_internal(self.spans),
181 for c in self.children {
182 diag.sub(c.level, &c.message[..], to_internal(c.spans));