1 //! Contains information about "passes", used to modify crate information during the documentation
4 use rustc_span::{InnerSpan, Span, DUMMY_SP};
7 use self::Condition::*;
8 use crate::clean::{self, DocFragmentKind};
9 use crate::core::DocContext;
12 crate use stripper::*;
15 crate use self::non_autolinks::CHECK_NON_AUTOLINKS;
18 crate use self::strip_hidden::STRIP_HIDDEN;
21 crate use self::strip_private::STRIP_PRIVATE;
23 mod strip_priv_imports;
24 crate use self::strip_priv_imports::STRIP_PRIV_IMPORTS;
26 mod unindent_comments;
27 crate use self::unindent_comments::UNINDENT_COMMENTS;
29 mod propagate_doc_cfg;
30 crate use self::propagate_doc_cfg::PROPAGATE_DOC_CFG;
32 mod collect_intra_doc_links;
33 crate use self::collect_intra_doc_links::COLLECT_INTRA_DOC_LINKS;
36 crate use self::doc_test_lints::CHECK_PRIVATE_ITEMS_DOC_TESTS;
38 mod collect_trait_impls;
39 crate use self::collect_trait_impls::COLLECT_TRAIT_IMPLS;
41 mod check_code_block_syntax;
42 crate use self::check_code_block_syntax::CHECK_CODE_BLOCK_SYNTAX;
44 mod calculate_doc_coverage;
45 crate use self::calculate_doc_coverage::CALCULATE_DOC_COVERAGE;
48 crate use self::html_tags::CHECK_INVALID_HTML_TAGS;
50 /// A single pass over the cleaned documentation.
52 /// Runs in the compiler context, so it has access to types and traits and the like.
53 #[derive(Copy, Clone)]
55 crate name: &'static str,
56 crate run: fn(clean::Crate, &mut DocContext<'_>) -> clean::Crate,
57 crate description: &'static str,
60 /// In a list of passes, a pass that may or may not need to be run depending on options.
61 #[derive(Copy, Clone)]
62 crate struct ConditionalPass {
64 crate condition: Condition,
67 /// How to decide whether to run a conditional pass.
68 #[derive(Copy, Clone)]
69 crate enum Condition {
71 /// When `--document-private-items` is passed.
73 /// When `--document-private-items` is not passed.
74 WhenNotDocumentPrivate,
75 /// When `--document-hidden-items` is not passed.
76 WhenNotDocumentHidden,
79 /// The full list of passes.
80 crate const PASSES: &[Pass] = &[
81 CHECK_PRIVATE_ITEMS_DOC_TESTS,
87 COLLECT_INTRA_DOC_LINKS,
88 CHECK_CODE_BLOCK_SYNTAX,
90 CALCULATE_DOC_COVERAGE,
91 CHECK_INVALID_HTML_TAGS,
95 /// The list of passes run by default.
96 crate const DEFAULT_PASSES: &[ConditionalPass] = &[
97 ConditionalPass::always(COLLECT_TRAIT_IMPLS),
98 ConditionalPass::always(UNINDENT_COMMENTS),
99 ConditionalPass::always(CHECK_PRIVATE_ITEMS_DOC_TESTS),
100 ConditionalPass::new(STRIP_HIDDEN, WhenNotDocumentHidden),
101 ConditionalPass::new(STRIP_PRIVATE, WhenNotDocumentPrivate),
102 ConditionalPass::new(STRIP_PRIV_IMPORTS, WhenDocumentPrivate),
103 ConditionalPass::always(COLLECT_INTRA_DOC_LINKS),
104 ConditionalPass::always(CHECK_CODE_BLOCK_SYNTAX),
105 ConditionalPass::always(CHECK_INVALID_HTML_TAGS),
106 ConditionalPass::always(PROPAGATE_DOC_CFG),
107 ConditionalPass::always(CHECK_NON_AUTOLINKS),
110 /// The list of default passes run when `--doc-coverage` is passed to rustdoc.
111 crate const COVERAGE_PASSES: &[ConditionalPass] = &[
112 ConditionalPass::always(COLLECT_TRAIT_IMPLS),
113 ConditionalPass::new(STRIP_HIDDEN, WhenNotDocumentHidden),
114 ConditionalPass::new(STRIP_PRIVATE, WhenNotDocumentPrivate),
115 ConditionalPass::always(CALCULATE_DOC_COVERAGE),
118 impl ConditionalPass {
119 crate const fn always(pass: Pass) -> Self {
120 Self::new(pass, Always)
123 crate const fn new(pass: Pass, condition: Condition) -> Self {
124 ConditionalPass { pass, condition }
128 /// A shorthand way to refer to which set of passes to use, based on the presence of
129 /// `--no-defaults` and `--show-coverage`.
130 #[derive(Copy, Clone, PartialEq, Eq, Debug)]
131 crate enum DefaultPassOption {
137 /// Returns the given default set of passes.
138 crate fn defaults(default_set: DefaultPassOption) -> &'static [ConditionalPass] {
140 DefaultPassOption::Default => DEFAULT_PASSES,
141 DefaultPassOption::Coverage => COVERAGE_PASSES,
142 DefaultPassOption::None => &[],
146 /// If the given name matches a known pass, returns its information.
147 crate fn find_pass(pass_name: &str) -> Option<Pass> {
148 PASSES.iter().find(|p| p.name == pass_name).copied()
151 /// Returns a span encompassing all the given attributes.
152 crate fn span_of_attrs(attrs: &clean::Attributes) -> Option<Span> {
153 if attrs.doc_strings.is_empty() {
156 let start = attrs.doc_strings[0].span;
157 if start == DUMMY_SP {
160 let end = attrs.doc_strings.last().expect("no doc strings provided").span;
164 /// Attempts to match a range of bytes from parsed markdown to a `Span` in the source code.
166 /// This method will return `None` if we cannot construct a span from the source map or if the
167 /// attributes are not all sugared doc comments. It's difficult to calculate the correct span in
168 /// that case due to escaping and other source features.
169 crate fn source_span_for_markdown_range(
172 md_range: &Range<usize>,
173 attrs: &clean::Attributes,
175 let is_all_sugared_doc =
176 attrs.doc_strings.iter().all(|frag| frag.kind == DocFragmentKind::SugaredDoc);
178 if !is_all_sugared_doc {
182 let snippet = cx.sess().source_map().span_to_snippet(span_of_attrs(attrs)?).ok()?;
184 let starting_line = markdown[..md_range.start].matches('\n').count();
185 let ending_line = starting_line + markdown[md_range.start..md_range.end].matches('\n').count();
187 // We use `split_terminator('\n')` instead of `lines()` when counting bytes so that we treat
188 // CRLF and LF line endings the same way.
189 let mut src_lines = snippet.split_terminator('\n');
190 let md_lines = markdown.split_terminator('\n');
192 // The number of bytes from the source span to the markdown span that are not part
193 // of the markdown, like comment markers.
194 let mut start_bytes = 0;
195 let mut end_bytes = 0;
197 'outer: for (line_no, md_line) in md_lines.enumerate() {
199 let source_line = src_lines.next().expect("could not find markdown in source");
200 match source_line.find(md_line) {
202 if line_no == starting_line {
203 start_bytes += offset;
205 if starting_line == ending_line {
208 } else if line_no == ending_line {
211 } else if line_no < starting_line {
212 start_bytes += source_line.len() - md_line.len();
214 end_bytes += source_line.len() - md_line.len();
219 // Since this is a source line that doesn't include a markdown line,
220 // we have to count the newline that we split from earlier.
221 if line_no <= starting_line {
222 start_bytes += source_line.len() + 1;
224 end_bytes += source_line.len() + 1;
231 Some(span_of_attrs(attrs)?.from_inner(InnerSpan::new(
232 md_range.start + start_bytes,
233 md_range.end + start_bytes + end_bytes,