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-rw-r--r--crates/ra_hir_expand/src/builtin_macro.rs163
-rw-r--r--crates/ra_hir_expand/src/db.rs6
-rw-r--r--crates/ra_hir_expand/src/lib.rs7
-rw-r--r--crates/ra_hir_expand/src/test_db.rs50
4 files changed, 184 insertions, 42 deletions
diff --git a/crates/ra_hir_expand/src/builtin_macro.rs b/crates/ra_hir_expand/src/builtin_macro.rs
index 4da56529d..c0e0436c0 100644
--- a/crates/ra_hir_expand/src/builtin_macro.rs
+++ b/crates/ra_hir_expand/src/builtin_macro.rs
@@ -8,47 +8,47 @@ use crate::{
8 8
9use crate::quote; 9use crate::quote;
10 10
11#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)] 11macro_rules! register_builtin {
12pub enum BuiltinExpander { 12 ( $(($name:ident, $kind: ident) => $expand:ident),* ) => {
13 Column, 13 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
14 File, 14 pub enum BuiltinFnLikeExpander {
15 Line, 15 $($kind),*
16 Stringify, 16 }
17}
18 17
19impl BuiltinExpander { 18 impl BuiltinFnLikeExpander {
20 pub fn expand( 19 pub fn expand(
21 &self, 20 &self,
22 db: &dyn AstDatabase, 21 db: &dyn AstDatabase,
23 id: MacroCallId, 22 id: MacroCallId,
24 tt: &tt::Subtree, 23 tt: &tt::Subtree,
25 ) -> Result<tt::Subtree, mbe::ExpandError> { 24 ) -> Result<tt::Subtree, mbe::ExpandError> {
26 match self { 25 let expander = match *self {
27 BuiltinExpander::Column => column_expand(db, id, tt), 26 $( BuiltinFnLikeExpander::$kind => $expand, )*
28 BuiltinExpander::File => file_expand(db, id, tt), 27 };
29 BuiltinExpander::Line => line_expand(db, id, tt), 28 expander(db, id, tt)
30 BuiltinExpander::Stringify => stringify_expand(db, id, tt), 29 }
31 } 30 }
32 } 31
32 pub fn find_builtin_macro(
33 ident: &name::Name,
34 krate: CrateId,
35 ast_id: AstId<ast::MacroCall>,
36 ) -> Option<MacroDefId> {
37 let kind = match ident {
38 $( id if id == &name::$name => BuiltinFnLikeExpander::$kind, )*
39 _ => return None,
40 };
41
42 Some(MacroDefId { krate, ast_id, kind: MacroDefKind::BuiltIn(kind) })
43 }
44 };
33} 45}
34 46
35pub fn find_builtin_macro( 47register_builtin! {
36 ident: &name::Name, 48 (COLUMN_MACRO, Column) => column_expand,
37 krate: CrateId, 49 (FILE_MACRO, File) => file_expand,
38 ast_id: AstId<ast::MacroCall>, 50 (LINE_MACRO, Line) => line_expand,
39) -> Option<MacroDefId> { 51 (STRINGIFY_MACRO, Stringify) => stringify_expand
40 // FIXME: Better registering method
41 if ident == &name::COLUMN_MACRO {
42 Some(MacroDefId { krate, ast_id, kind: MacroDefKind::BuiltIn(BuiltinExpander::Column) })
43 } else if ident == &name::FILE_MACRO {
44 Some(MacroDefId { krate, ast_id, kind: MacroDefKind::BuiltIn(BuiltinExpander::File) })
45 } else if ident == &name::LINE_MACRO {
46 Some(MacroDefId { krate, ast_id, kind: MacroDefKind::BuiltIn(BuiltinExpander::Line) })
47 } else if ident == &name::STRINGIFY_MACRO {
48 Some(MacroDefId { krate, ast_id, kind: MacroDefKind::BuiltIn(BuiltinExpander::Stringify) })
49 } else {
50 None
51 }
52} 52}
53 53
54fn to_line_number(db: &dyn AstDatabase, file: HirFileId, pos: TextUnit) -> usize { 54fn to_line_number(db: &dyn AstDatabase, file: HirFileId, pos: TextUnit) -> usize {
@@ -171,3 +171,92 @@ fn file_expand(
171 171
172 Ok(expanded) 172 Ok(expanded)
173} 173}
174
175#[cfg(test)]
176mod tests {
177 use super::*;
178 use crate::{test_db::TestDB, MacroCallLoc};
179 use ra_db::{fixture::WithFixture, SourceDatabase};
180
181 fn expand_builtin_macro(s: &str, expander: BuiltinFnLikeExpander) -> String {
182 let (db, file_id) = TestDB::with_single_file(&s);
183 let parsed = db.parse(file_id);
184 let macro_calls: Vec<_> =
185 parsed.syntax_node().descendants().filter_map(|it| ast::MacroCall::cast(it)).collect();
186
187 let ast_id_map = db.ast_id_map(file_id.into());
188
189 // the first one should be a macro_rules
190 let def = MacroDefId {
191 krate: CrateId(0),
192 ast_id: AstId::new(file_id.into(), ast_id_map.ast_id(&macro_calls[0])),
193 kind: MacroDefKind::BuiltIn(expander),
194 };
195
196 let loc = MacroCallLoc {
197 def,
198 ast_id: AstId::new(file_id.into(), ast_id_map.ast_id(&macro_calls[1])),
199 };
200
201 let id = db.intern_macro(loc);
202 let parsed = db.parse_or_expand(id.as_file(MacroFileKind::Expr)).unwrap();
203
204 parsed.text().to_string()
205 }
206
207 #[test]
208 fn test_column_expand() {
209 let expanded = expand_builtin_macro(
210 r#"
211 #[rustc_builtin_macro]
212 macro_rules! column {() => {}}
213 column!()
214"#,
215 BuiltinFnLikeExpander::Column,
216 );
217
218 assert_eq!(expanded, "9");
219 }
220
221 #[test]
222 fn test_line_expand() {
223 let expanded = expand_builtin_macro(
224 r#"
225 #[rustc_builtin_macro]
226 macro_rules! line {() => {}}
227 line!()
228"#,
229 BuiltinFnLikeExpander::Line,
230 );
231
232 assert_eq!(expanded, "4");
233 }
234
235 #[test]
236 fn test_stringify_expand() {
237 let expanded = expand_builtin_macro(
238 r#"
239 #[rustc_builtin_macro]
240 macro_rules! stringify {() => {}}
241 stringify!(a b c)
242"#,
243 BuiltinFnLikeExpander::Stringify,
244 );
245
246 assert_eq!(expanded, "\"a b c\"");
247 }
248
249 #[test]
250 fn test_file_expand() {
251 let expanded = expand_builtin_macro(
252 r#"
253 #[rustc_builtin_macro]
254 macro_rules! file {() => {}}
255 file!()
256"#,
257 BuiltinFnLikeExpander::File,
258 );
259
260 assert_eq!(expanded, "\"\"");
261 }
262}
diff --git a/crates/ra_hir_expand/src/db.rs b/crates/ra_hir_expand/src/db.rs
index e1d93a8ef..8e46fa177 100644
--- a/crates/ra_hir_expand/src/db.rs
+++ b/crates/ra_hir_expand/src/db.rs
@@ -9,14 +9,14 @@ use ra_prof::profile;
9use ra_syntax::{AstNode, Parse, SyntaxNode}; 9use ra_syntax::{AstNode, Parse, SyntaxNode};
10 10
11use crate::{ 11use crate::{
12 ast_id_map::AstIdMap, BuiltinExpander, HirFileId, HirFileIdRepr, MacroCallId, MacroCallLoc, 12 ast_id_map::AstIdMap, BuiltinFnLikeExpander, HirFileId, HirFileIdRepr, MacroCallId,
13 MacroDefId, MacroDefKind, MacroFile, MacroFileKind, 13 MacroCallLoc, MacroDefId, MacroDefKind, MacroFile, MacroFileKind,
14}; 14};
15 15
16#[derive(Debug, Clone, Eq, PartialEq)] 16#[derive(Debug, Clone, Eq, PartialEq)]
17pub enum TokenExpander { 17pub enum TokenExpander {
18 MacroRules(mbe::MacroRules), 18 MacroRules(mbe::MacroRules),
19 Builtin(BuiltinExpander), 19 Builtin(BuiltinFnLikeExpander),
20} 20}
21 21
22impl TokenExpander { 22impl TokenExpander {
diff --git a/crates/ra_hir_expand/src/lib.rs b/crates/ra_hir_expand/src/lib.rs
index 126d12fbb..4f3ccf1d0 100644
--- a/crates/ra_hir_expand/src/lib.rs
+++ b/crates/ra_hir_expand/src/lib.rs
@@ -24,7 +24,10 @@ use ra_syntax::{
24}; 24};
25 25
26use crate::ast_id_map::FileAstId; 26use crate::ast_id_map::FileAstId;
27use crate::builtin_macro::BuiltinExpander; 27use crate::builtin_macro::BuiltinFnLikeExpander;
28
29#[cfg(test)]
30mod test_db;
28 31
29/// Input to the analyzer is a set of files, where each file is identified by 32/// Input to the analyzer is a set of files, where each file is identified by
30/// `FileId` and contains source code. However, another source of source code in 33/// `FileId` and contains source code. However, another source of source code in
@@ -135,7 +138,7 @@ pub struct MacroDefId {
135#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)] 138#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
136pub enum MacroDefKind { 139pub enum MacroDefKind {
137 Declarative, 140 Declarative,
138 BuiltIn(BuiltinExpander), 141 BuiltIn(BuiltinFnLikeExpander),
139} 142}
140 143
141#[derive(Debug, Clone, PartialEq, Eq, Hash)] 144#[derive(Debug, Clone, PartialEq, Eq, Hash)]
diff --git a/crates/ra_hir_expand/src/test_db.rs b/crates/ra_hir_expand/src/test_db.rs
new file mode 100644
index 000000000..d23e75d9e
--- /dev/null
+++ b/crates/ra_hir_expand/src/test_db.rs
@@ -0,0 +1,50 @@
1//! Database used for testing `hir_expand`.
2
3use std::{
4 panic,
5 sync::{Arc, Mutex},
6};
7
8use ra_db::{salsa, CrateId, FileId, FileLoader, FileLoaderDelegate, RelativePath};
9
10#[salsa::database(
11 ra_db::SourceDatabaseExtStorage,
12 ra_db::SourceDatabaseStorage,
13 crate::db::AstDatabaseStorage
14)]
15#[derive(Debug, Default)]
16pub struct TestDB {
17 runtime: salsa::Runtime<TestDB>,
18 events: Mutex<Option<Vec<salsa::Event<TestDB>>>>,
19}
20
21impl salsa::Database for TestDB {
22 fn salsa_runtime(&self) -> &salsa::Runtime<Self> {
23 &self.runtime
24 }
25
26 fn salsa_event(&self, event: impl Fn() -> salsa::Event<TestDB>) {
27 let mut events = self.events.lock().unwrap();
28 if let Some(events) = &mut *events {
29 events.push(event());
30 }
31 }
32}
33
34impl panic::RefUnwindSafe for TestDB {}
35
36impl FileLoader for TestDB {
37 fn file_text(&self, file_id: FileId) -> Arc<String> {
38 FileLoaderDelegate(self).file_text(file_id)
39 }
40 fn resolve_relative_path(
41 &self,
42 anchor: FileId,
43 relative_path: &RelativePath,
44 ) -> Option<FileId> {
45 FileLoaderDelegate(self).resolve_relative_path(anchor, relative_path)
46 }
47 fn relevant_crates(&self, file_id: FileId) -> Arc<Vec<CrateId>> {
48 FileLoaderDelegate(self).relevant_crates(file_id)
49 }
50}