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-rw-r--r--crates/ra_ide/src/expand.rs102
1 files changed, 0 insertions, 102 deletions
diff --git a/crates/ra_ide/src/expand.rs b/crates/ra_ide/src/expand.rs
deleted file mode 100644
index 9f3aaa3a3..000000000
--- a/crates/ra_ide/src/expand.rs
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@@ -1,102 +0,0 @@
1//! Utilities to work with files, produced by macros.
2use std::iter::successors;
3
4use hir::{InFile, Origin};
5use ra_db::FileId;
6use ra_ide_db::RootDatabase;
7use ra_syntax::{ast, AstNode, SyntaxNode, SyntaxToken, TextRange};
8
9use crate::FileRange;
10
11pub(crate) fn original_range(db: &RootDatabase, node: InFile<&SyntaxNode>) -> FileRange {
12 if let Some((range, Origin::Call)) = original_range_and_origin(db, node) {
13 return range;
14 }
15
16 if let Some(expansion) = node.file_id.expansion_info(db) {
17 if let Some(call_node) = expansion.call_node() {
18 return FileRange {
19 file_id: call_node.file_id.original_file(db),
20 range: call_node.value.text_range(),
21 };
22 }
23 }
24
25 FileRange { file_id: node.file_id.original_file(db), range: node.value.text_range() }
26}
27
28fn original_range_and_origin(
29 db: &RootDatabase,
30 node: InFile<&SyntaxNode>,
31) -> Option<(FileRange, Origin)> {
32 let expansion = node.file_id.expansion_info(db)?;
33
34 // the input node has only one token ?
35 let single = node.value.first_token()? == node.value.last_token()?;
36
37 // FIXME: We should handle recurside macro expansions
38 let (range, origin) = node.value.descendants().find_map(|it| {
39 let first = it.first_token()?;
40 let last = it.last_token()?;
41
42 if !single && first == last {
43 return None;
44 }
45
46 // Try to map first and last tokens of node, and, if success, return the union range of mapped tokens
47 let (first, first_origin) = expansion.map_token_up(node.with_value(&first))?;
48 let (last, last_origin) = expansion.map_token_up(node.with_value(&last))?;
49
50 if first.file_id != last.file_id || first_origin != last_origin {
51 return None;
52 }
53
54 // FIXME: Add union method in TextRange
55 Some((
56 first.with_value(union_range(first.value.text_range(), last.value.text_range())),
57 first_origin,
58 ))
59 })?;
60
61 return Some((
62 FileRange { file_id: range.file_id.original_file(db), range: range.value },
63 origin,
64 ));
65
66 fn union_range(a: TextRange, b: TextRange) -> TextRange {
67 let start = a.start().min(b.start());
68 let end = a.end().max(b.end());
69 TextRange::from_to(start, end)
70 }
71}
72
73pub(crate) fn descend_into_macros(
74 db: &RootDatabase,
75 file_id: FileId,
76 token: SyntaxToken,
77) -> InFile<SyntaxToken> {
78 let src = InFile::new(file_id.into(), token);
79
80 let source_analyzer =
81 hir::SourceAnalyzer::new(db, src.with_value(src.value.parent()).as_ref(), None);
82
83 descend_into_macros_with_analyzer(db, &source_analyzer, src)
84}
85
86pub(crate) fn descend_into_macros_with_analyzer(
87 db: &RootDatabase,
88 source_analyzer: &hir::SourceAnalyzer,
89 src: InFile<SyntaxToken>,
90) -> InFile<SyntaxToken> {
91 successors(Some(src), |token| {
92 let macro_call = token.value.ancestors().find_map(ast::MacroCall::cast)?;
93 let tt = macro_call.token_tree()?;
94 if !token.value.text_range().is_subrange(&tt.syntax().text_range()) {
95 return None;
96 }
97 let exp = source_analyzer.expand(db, token.with_value(&macro_call))?;
98 exp.map_token_down(db, token.as_ref())
99 })
100 .last()
101 .unwrap()
102}