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-rw-r--r--crates/ra_mbe/src/lib.rs1138
1 files changed, 1 insertions, 1137 deletions
diff --git a/crates/ra_mbe/src/lib.rs b/crates/ra_mbe/src/lib.rs
index ea2104b1c..9afc33093 100644
--- a/crates/ra_mbe/src/lib.rs
+++ b/crates/ra_mbe/src/lib.rs
@@ -15,7 +15,6 @@ macro_rules! impl_froms {
15 } 15 }
16} 16}
17 17
18// mod tt_cursor;
19mod mbe_parser; 18mod mbe_parser;
20mod mbe_expander; 19mod mbe_expander;
21mod syntax_bridge; 20mod syntax_bridge;
@@ -155,1139 +154,4 @@ pub(crate) struct Var {
155} 154}
156 155
157#[cfg(test)] 156#[cfg(test)]
158mod tests { 157mod tests; \ No newline at end of file
159 use ra_syntax::{ast, AstNode};
160
161 use super::*;
162
163 // Good first issue (although a slightly challenging one):
164 //
165 // * Pick a random test from here
166 // https://github.com/intellij-rust/intellij-rust/blob/c4e9feee4ad46e7953b1948c112533360b6087bb/src/test/kotlin/org/rust/lang/core/macros/RsMacroExpansionTest.kt
167 // * Port the test to rust and add it to this module
168 // * Make it pass :-)
169
170 #[test]
171 fn test_convert_tt() {
172 let macro_definition = r#"
173macro_rules! impl_froms {
174 ($e:ident: $($v:ident),*) => {
175 $(
176 impl From<$v> for $e {
177 fn from(it: $v) -> $e {
178 $e::$v(it)
179 }
180 }
181 )*
182 }
183}
184"#;
185
186 let macro_invocation = r#"
187impl_froms!(TokenTree: Leaf, Subtree);
188"#;
189
190 let source_file = ast::SourceFile::parse(macro_definition);
191 let macro_definition =
192 source_file.syntax().descendants().find_map(ast::MacroCall::cast).unwrap();
193
194 let source_file = ast::SourceFile::parse(macro_invocation);
195 let macro_invocation =
196 source_file.syntax().descendants().find_map(ast::MacroCall::cast).unwrap();
197
198 let (definition_tt, _) = ast_to_token_tree(macro_definition.token_tree().unwrap()).unwrap();
199 let (invocation_tt, _) = ast_to_token_tree(macro_invocation.token_tree().unwrap()).unwrap();
200 let rules = crate::MacroRules::parse(&definition_tt).unwrap();
201 let expansion = rules.expand(&invocation_tt).unwrap();
202 assert_eq!(
203 expansion.to_string(),
204 "impl From <Leaf > for TokenTree {fn from (it : Leaf) -> TokenTree {TokenTree ::Leaf (it)}} \
205 impl From <Subtree > for TokenTree {fn from (it : Subtree) -> TokenTree {TokenTree ::Subtree (it)}}"
206 )
207 }
208
209 pub(crate) fn create_rules(macro_definition: &str) -> MacroRules {
210 let source_file = ast::SourceFile::parse(macro_definition);
211 let macro_definition =
212 source_file.syntax().descendants().find_map(ast::MacroCall::cast).unwrap();
213
214 let (definition_tt, _) = ast_to_token_tree(macro_definition.token_tree().unwrap()).unwrap();
215 crate::MacroRules::parse(&definition_tt).unwrap()
216 }
217
218 pub(crate) fn expand(rules: &MacroRules, invocation: &str) -> tt::Subtree {
219 let source_file = ast::SourceFile::parse(invocation);
220 let macro_invocation =
221 source_file.syntax().descendants().find_map(ast::MacroCall::cast).unwrap();
222
223 let (invocation_tt, _) = ast_to_token_tree(macro_invocation.token_tree().unwrap()).unwrap();
224
225 rules.expand(&invocation_tt).unwrap()
226 }
227
228 pub(crate) fn expand_to_items(
229 rules: &MacroRules,
230 invocation: &str,
231 ) -> ra_syntax::TreeArc<ast::MacroItems> {
232 let expanded = expand(rules, invocation);
233 token_tree_to_macro_items(&expanded).unwrap()
234 }
235
236 #[allow(unused)]
237 pub(crate) fn expand_to_stmts(
238 rules: &MacroRules,
239 invocation: &str,
240 ) -> ra_syntax::TreeArc<ast::MacroStmts> {
241 let expanded = expand(rules, invocation);
242 token_tree_to_macro_stmts(&expanded).unwrap()
243 }
244
245 pub(crate) fn expand_to_expr(
246 rules: &MacroRules,
247 invocation: &str,
248 ) -> ra_syntax::TreeArc<ast::Expr> {
249 let expanded = expand(rules, invocation);
250 token_tree_to_expr(&expanded).unwrap()
251 }
252
253 pub(crate) fn assert_expansion(
254 rules: &MacroRules,
255 invocation: &str,
256 expansion: &str,
257 ) -> tt::Subtree {
258 let expanded = expand(rules, invocation);
259 assert_eq!(expanded.to_string(), expansion);
260
261 // FIXME: Temp comment below code
262 // It is because after the lexer change,
263 // The SyntaxNode structure cannot be matched easily
264
265 // let tree = token_tree_to_macro_items(&expanded);
266
267 // // Eat all white space by parse it back and forth
268 // // Because $crate will seperate in two token , will do some special treatment here
269 // let expansion = expansion.replace("$crate", "C_C__C");
270 // let expansion = ast::SourceFile::parse(&expansion);
271 // let expansion = syntax_node_to_token_tree(expansion.syntax()).unwrap().0;
272 // let file = token_tree_to_macro_items(&expansion);
273 // let file = file.unwrap().syntax().debug_dump().trim().to_string();
274 // let tree = tree.unwrap().syntax().debug_dump().trim().to_string();
275
276 // let file = file.replace("C_C__C", "$crate");
277 // assert_eq!(tree, file,);
278
279 expanded
280 }
281
282 #[test]
283 fn test_fail_match_pattern_by_first_token() {
284 let rules = create_rules(
285 r#"
286 macro_rules! foo {
287 ($ i:ident) => (
288 mod $ i {}
289 );
290 (= $ i:ident) => (
291 fn $ i() {}
292 );
293 (+ $ i:ident) => (
294 struct $ i;
295 )
296 }
297"#,
298 );
299
300 assert_expansion(&rules, "foo! { foo }", "mod foo {}");
301 assert_expansion(&rules, "foo! { = bar }", "fn bar () {}");
302 assert_expansion(&rules, "foo! { + Baz }", "struct Baz ;");
303 }
304
305 #[test]
306 fn test_fail_match_pattern_by_last_token() {
307 let rules = create_rules(
308 r#"
309 macro_rules! foo {
310 ($ i:ident) => (
311 mod $ i {}
312 );
313 ($ i:ident =) => (
314 fn $ i() {}
315 );
316 ($ i:ident +) => (
317 struct $ i;
318 )
319 }
320"#,
321 );
322
323 assert_expansion(&rules, "foo! { foo }", "mod foo {}");
324 assert_expansion(&rules, "foo! { bar = }", "fn bar () {}");
325 assert_expansion(&rules, "foo! { Baz + }", "struct Baz ;");
326 }
327
328 #[test]
329 fn test_fail_match_pattern_by_word_token() {
330 let rules = create_rules(
331 r#"
332 macro_rules! foo {
333 ($ i:ident) => (
334 mod $ i {}
335 );
336 (spam $ i:ident) => (
337 fn $ i() {}
338 );
339 (eggs $ i:ident) => (
340 struct $ i;
341 )
342 }
343"#,
344 );
345
346 assert_expansion(&rules, "foo! { foo }", "mod foo {}");
347 assert_expansion(&rules, "foo! { spam bar }", "fn bar () {}");
348 assert_expansion(&rules, "foo! { eggs Baz }", "struct Baz ;");
349 }
350
351 #[test]
352 fn test_match_group_pattern_by_separator_token() {
353 let rules = create_rules(
354 r#"
355 macro_rules! foo {
356 ($ ($ i:ident),*) => ($ (
357 mod $ i {}
358 )*);
359 ($ ($ i:ident)#*) => ($ (
360 fn $ i() {}
361 )*);
362 ($ i:ident ,# $ j:ident) => (
363 struct $ i;
364 struct $ j;
365 )
366 }
367"#,
368 );
369
370 assert_expansion(&rules, "foo! { foo, bar }", "mod foo {} mod bar {}");
371 assert_expansion(&rules, "foo! { foo# bar }", "fn foo () {} fn bar () {}");
372 assert_expansion(&rules, "foo! { Foo,# Bar }", "struct Foo ; struct Bar ;");
373 }
374
375 #[test]
376 fn test_match_group_pattern_with_multiple_defs() {
377 let rules = create_rules(
378 r#"
379 macro_rules! foo {
380 ($ ($ i:ident),*) => ( struct Bar { $ (
381 fn $ i {}
382 )*} );
383 }
384"#,
385 );
386
387 assert_expansion(&rules, "foo! { foo, bar }", "struct Bar {fn foo {} fn bar {}}");
388 }
389
390 #[test]
391 fn test_match_group_pattern_with_multiple_statement() {
392 let rules = create_rules(
393 r#"
394 macro_rules! foo {
395 ($ ($ i:ident),*) => ( fn baz { $ (
396 $ i ();
397 )*} );
398 }
399"#,
400 );
401
402 assert_expansion(&rules, "foo! { foo, bar }", "fn baz {foo () ; bar () ;}");
403 }
404
405 #[test]
406 fn test_match_group_pattern_with_multiple_statement_without_semi() {
407 let rules = create_rules(
408 r#"
409 macro_rules! foo {
410 ($ ($ i:ident),*) => ( fn baz { $ (
411 $i()
412 );*} );
413 }
414"#,
415 );
416
417 assert_expansion(&rules, "foo! { foo, bar }", "fn baz {foo () ;bar ()}");
418 }
419
420 #[test]
421 fn test_match_group_empty_fixed_token() {
422 let rules = create_rules(
423 r#"
424 macro_rules! foo {
425 ($ ($ i:ident)* #abc) => ( fn baz { $ (
426 $ i ();
427 )*} );
428 }
429"#,
430 );
431
432 assert_expansion(&rules, "foo! {#abc}", "fn baz {}");
433 }
434
435 #[test]
436 fn test_match_group_in_subtree() {
437 let rules = create_rules(
438 r#"
439 macro_rules! foo {
440 (fn $name:ident {$($i:ident)*} ) => ( fn $name() { $ (
441 $ i ();
442 )*} );
443 }"#,
444 );
445
446 assert_expansion(&rules, "foo! {fn baz {a b} }", "fn baz () {a () ; b () ;}");
447 }
448
449 #[test]
450 fn test_match_group_with_multichar_sep() {
451 let rules = create_rules(
452 r#"
453 macro_rules! foo {
454 (fn $name:ident {$($i:literal)*} ) => ( fn $name() -> bool { $($i)&&*} );
455 }"#,
456 );
457
458 assert_expansion(&rules, "foo! (fn baz {true true} )", "fn baz () -> bool {true &&true}");
459 }
460
461 #[test]
462 fn test_match_group_zero_match() {
463 let rules = create_rules(
464 r#"
465 macro_rules! foo {
466 ( $($i:ident)* ) => ();
467 }"#,
468 );
469
470 assert_expansion(&rules, "foo! ()", "");
471 }
472
473 #[test]
474 fn test_match_group_in_group() {
475 let rules = create_rules(
476 r#"
477 macro_rules! foo {
478 { $( ( $($i:ident)* ) )* } => ( $( ( $($i)* ) )* );
479 }"#,
480 );
481
482 assert_expansion(&rules, "foo! ( (a b) )", "(a b)");
483 }
484
485 #[test]
486 fn test_expand_to_item_list() {
487 let rules = create_rules(
488 "
489 macro_rules! structs {
490 ($($i:ident),*) => {
491 $(struct $i { field: u32 } )*
492 }
493 }
494 ",
495 );
496 let expansion = expand(&rules, "structs!(Foo, Bar)");
497 let tree = token_tree_to_macro_items(&expansion);
498 assert_eq!(
499 tree.unwrap().syntax().debug_dump().trim(),
500 r#"
501MACRO_ITEMS@[0; 40)
502 STRUCT_DEF@[0; 20)
503 STRUCT_KW@[0; 6) "struct"
504 NAME@[6; 9)
505 IDENT@[6; 9) "Foo"
506 NAMED_FIELD_DEF_LIST@[9; 20)
507 L_CURLY@[9; 10) "{"
508 NAMED_FIELD_DEF@[10; 19)
509 NAME@[10; 15)
510 IDENT@[10; 15) "field"
511 COLON@[15; 16) ":"
512 PATH_TYPE@[16; 19)
513 PATH@[16; 19)
514 PATH_SEGMENT@[16; 19)
515 NAME_REF@[16; 19)
516 IDENT@[16; 19) "u32"
517 R_CURLY@[19; 20) "}"
518 STRUCT_DEF@[20; 40)
519 STRUCT_KW@[20; 26) "struct"
520 NAME@[26; 29)
521 IDENT@[26; 29) "Bar"
522 NAMED_FIELD_DEF_LIST@[29; 40)
523 L_CURLY@[29; 30) "{"
524 NAMED_FIELD_DEF@[30; 39)
525 NAME@[30; 35)
526 IDENT@[30; 35) "field"
527 COLON@[35; 36) ":"
528 PATH_TYPE@[36; 39)
529 PATH@[36; 39)
530 PATH_SEGMENT@[36; 39)
531 NAME_REF@[36; 39)
532 IDENT@[36; 39) "u32"
533 R_CURLY@[39; 40) "}""#
534 .trim()
535 );
536 }
537
538 #[test]
539 fn test_expand_literals_to_token_tree() {
540 fn to_subtree(tt: &tt::TokenTree) -> &tt::Subtree {
541 if let tt::TokenTree::Subtree(subtree) = tt {
542 return &subtree;
543 }
544 unreachable!("It is not a subtree");
545 }
546
547 fn to_literal(tt: &tt::TokenTree) -> &tt::Literal {
548 if let tt::TokenTree::Leaf(tt::Leaf::Literal(lit)) = tt {
549 return lit;
550 }
551 unreachable!("It is not a literal");
552 }
553
554 let rules = create_rules(
555 r#"
556 macro_rules! literals {
557 ($i:ident) => {
558 {
559 let a = 'c';
560 let c = 1000;
561 let f = 12E+99_f64;
562 let s = "rust1";
563 }
564 }
565 }
566 "#,
567 );
568 let expansion = expand(&rules, "literals!(foo)");
569 let stm_tokens = &to_subtree(&expansion.token_trees[0]).token_trees;
570
571 // [let] [a] [=] ['c'] [;]
572 assert_eq!(to_literal(&stm_tokens[3]).text, "'c'");
573 // [let] [c] [=] [1000] [;]
574 assert_eq!(to_literal(&stm_tokens[5 + 3]).text, "1000");
575 // [let] [f] [=] [12E+99_f64] [;]
576 assert_eq!(to_literal(&stm_tokens[10 + 3]).text, "12E+99_f64");
577 // [let] [s] [=] ["rust1"] [;]
578 assert_eq!(to_literal(&stm_tokens[15 + 3]).text, "\"rust1\"");
579 }
580
581 #[test]
582 fn test_two_idents() {
583 let rules = create_rules(
584 r#"
585 macro_rules! foo {
586 ($ i:ident, $ j:ident) => {
587 fn foo() { let a = $ i; let b = $j; }
588 }
589 }
590"#,
591 );
592 assert_expansion(&rules, "foo! { foo, bar }", "fn foo () {let a = foo ; let b = bar ;}");
593 }
594
595 #[test]
596 fn test_tt_to_stmts() {
597 let rules = create_rules(
598 r#"
599 macro_rules! foo {
600 () => {
601 let a = 0;
602 a = 10 + 1;
603 a
604 }
605 }
606"#,
607 );
608
609 let expanded = expand(&rules, "foo!{}");
610 let stmts = token_tree_to_macro_stmts(&expanded);
611
612 assert_eq!(
613 stmts.unwrap().syntax().debug_dump().trim(),
614 r#"MACRO_STMTS@[0; 15)
615 LET_STMT@[0; 7)
616 LET_KW@[0; 3) "let"
617 BIND_PAT@[3; 4)
618 NAME@[3; 4)
619 IDENT@[3; 4) "a"
620 EQ@[4; 5) "="
621 LITERAL@[5; 6)
622 INT_NUMBER@[5; 6) "0"
623 SEMI@[6; 7) ";"
624 EXPR_STMT@[7; 14)
625 BIN_EXPR@[7; 13)
626 PATH_EXPR@[7; 8)
627 PATH@[7; 8)
628 PATH_SEGMENT@[7; 8)
629 NAME_REF@[7; 8)
630 IDENT@[7; 8) "a"
631 EQ@[8; 9) "="
632 BIN_EXPR@[9; 13)
633 LITERAL@[9; 11)
634 INT_NUMBER@[9; 11) "10"
635 PLUS@[11; 12) "+"
636 LITERAL@[12; 13)
637 INT_NUMBER@[12; 13) "1"
638 SEMI@[13; 14) ";"
639 EXPR_STMT@[14; 15)
640 PATH_EXPR@[14; 15)
641 PATH@[14; 15)
642 PATH_SEGMENT@[14; 15)
643 NAME_REF@[14; 15)
644 IDENT@[14; 15) "a""#,
645 );
646 }
647
648 // The following tests are port from intellij-rust directly
649 // https://github.com/intellij-rust/intellij-rust/blob/c4e9feee4ad46e7953b1948c112533360b6087bb/src/test/kotlin/org/rust/lang/core/macros/RsMacroExpansionTest.kt
650
651 #[test]
652 fn test_path() {
653 let rules = create_rules(
654 r#"
655 macro_rules! foo {
656 ($ i:path) => {
657 fn foo() { let a = $ i; }
658 }
659 }
660"#,
661 );
662 assert_expansion(&rules, "foo! { foo }", "fn foo () {let a = foo ;}");
663 assert_expansion(
664 &rules,
665 "foo! { bar::<u8>::baz::<u8> }",
666 "fn foo () {let a = bar ::< u8 >:: baz ::< u8 > ;}",
667 );
668 }
669
670 #[test]
671 fn test_two_paths() {
672 let rules = create_rules(
673 r#"
674 macro_rules! foo {
675 ($ i:path, $ j:path) => {
676 fn foo() { let a = $ i; let b = $j; }
677 }
678 }
679"#,
680 );
681 assert_expansion(&rules, "foo! { foo, bar }", "fn foo () {let a = foo ; let b = bar ;}");
682 }
683
684 #[test]
685 fn test_path_with_path() {
686 let rules = create_rules(
687 r#"
688 macro_rules! foo {
689 ($ i:path) => {
690 fn foo() { let a = $ i :: bar; }
691 }
692 }
693"#,
694 );
695 assert_expansion(&rules, "foo! { foo }", "fn foo () {let a = foo :: bar ;}");
696 }
697
698 #[test]
699 fn test_expr() {
700 let rules = create_rules(
701 r#"
702 macro_rules! foo {
703 ($ i:expr) => {
704 fn bar() { $ i; }
705 }
706 }
707"#,
708 );
709
710 assert_expansion(
711 &rules,
712 "foo! { 2 + 2 * baz(3).quux() }",
713 "fn bar () {2 + 2 * baz (3) . quux () ;}",
714 );
715 }
716
717 #[test]
718 fn test_expr_order() {
719 let rules = create_rules(
720 r#"
721 macro_rules! foo {
722 ($ i:expr) => {
723 fn bar() { $ i * 2; }
724 }
725 }
726"#,
727 );
728
729 assert_eq!(
730 expand_to_items(&rules, "foo! { 1 + 1 }").syntax().debug_dump().trim(),
731 r#"MACRO_ITEMS@[0; 15)
732 FN_DEF@[0; 15)
733 FN_KW@[0; 2) "fn"
734 NAME@[2; 5)
735 IDENT@[2; 5) "bar"
736 PARAM_LIST@[5; 7)
737 L_PAREN@[5; 6) "("
738 R_PAREN@[6; 7) ")"
739 BLOCK@[7; 15)
740 L_CURLY@[7; 8) "{"
741 EXPR_STMT@[8; 14)
742 BIN_EXPR@[8; 13)
743 BIN_EXPR@[8; 11)
744 LITERAL@[8; 9)
745 INT_NUMBER@[8; 9) "1"
746 PLUS@[9; 10) "+"
747 LITERAL@[10; 11)
748 INT_NUMBER@[10; 11) "1"
749 STAR@[11; 12) "*"
750 LITERAL@[12; 13)
751 INT_NUMBER@[12; 13) "2"
752 SEMI@[13; 14) ";"
753 R_CURLY@[14; 15) "}""#,
754 );
755 }
756
757 #[test]
758 fn test_last_expr() {
759 let rules = create_rules(
760 r#"
761 macro_rules! vec {
762 ($($item:expr),*) => {
763 {
764 let mut v = Vec::new();
765 $(
766 v.push($item);
767 )*
768 v
769 }
770 };
771 }
772"#,
773 );
774 assert_expansion(
775 &rules,
776 "vec!(1,2,3)",
777 "{let mut v = Vec :: new () ; v . push (1) ; v . push (2) ; v . push (3) ; v}",
778 );
779 }
780
781 #[test]
782 fn test_ty() {
783 let rules = create_rules(
784 r#"
785 macro_rules! foo {
786 ($ i:ty) => (
787 fn bar() -> $ i { unimplemented!() }
788 )
789 }
790"#,
791 );
792 assert_expansion(
793 &rules,
794 "foo! { Baz<u8> }",
795 "fn bar () -> Baz < u8 > {unimplemented ! ()}",
796 );
797 }
798
799 #[test]
800 fn test_ty_with_complex_type() {
801 let rules = create_rules(
802 r#"
803 macro_rules! foo {
804 ($ i:ty) => (
805 fn bar() -> $ i { unimplemented!() }
806 )
807 }
808"#,
809 );
810
811 // Reference lifetime struct with generic type
812 assert_expansion(
813 &rules,
814 "foo! { &'a Baz<u8> }",
815 "fn bar () -> & 'a Baz < u8 > {unimplemented ! ()}",
816 );
817
818 // extern "Rust" func type
819 assert_expansion(
820 &rules,
821 r#"foo! { extern "Rust" fn() -> Ret }"#,
822 r#"fn bar () -> extern "Rust" fn () -> Ret {unimplemented ! ()}"#,
823 );
824 }
825
826 #[test]
827 fn test_pat_() {
828 let rules = create_rules(
829 r#"
830 macro_rules! foo {
831 ($ i:pat) => { fn foo() { let $ i; } }
832 }
833"#,
834 );
835 assert_expansion(&rules, "foo! { (a, b) }", "fn foo () {let (a , b) ;}");
836 }
837
838 #[test]
839 fn test_stmt() {
840 let rules = create_rules(
841 r#"
842 macro_rules! foo {
843 ($ i:stmt) => (
844 fn bar() { $ i; }
845 )
846 }
847"#,
848 );
849 assert_expansion(&rules, "foo! { 2 }", "fn bar () {2 ;}");
850 assert_expansion(&rules, "foo! { let a = 0 }", "fn bar () {let a = 0 ;}");
851 }
852
853 #[test]
854 fn test_single_item() {
855 let rules = create_rules(
856 r#"
857 macro_rules! foo {
858 ($ i:item) => (
859 $ i
860 )
861 }
862"#,
863 );
864 assert_expansion(&rules, "foo! {mod c {}}", "mod c {}");
865 }
866
867 #[test]
868 fn test_all_items() {
869 let rules = create_rules(
870 r#"
871 macro_rules! foo {
872 ($ ($ i:item)*) => ($ (
873 $ i
874 )*)
875 }
876"#,
877 );
878 assert_expansion(&rules, r#"
879 foo! {
880 extern crate a;
881 mod b;
882 mod c {}
883 use d;
884 const E: i32 = 0;
885 static F: i32 = 0;
886 impl G {}
887 struct H;
888 enum I { Foo }
889 trait J {}
890 fn h() {}
891 extern {}
892 type T = u8;
893 }
894"#, r#"extern crate a ; mod b ; mod c {} use d ; const E : i32 = 0 ; static F : i32 = 0 ; impl G {} struct H ; enum I {Foo} trait J {} fn h () {} extern {} type T = u8 ;"#);
895 }
896
897 #[test]
898 fn test_block() {
899 let rules = create_rules(
900 r#"
901 macro_rules! foo {
902 ($ i:block) => { fn foo() $ i }
903 }
904"#,
905 );
906 assert_expansion(&rules, "foo! { { 1; } }", "fn foo () {1 ;}");
907 }
908
909 #[test]
910 fn test_meta() {
911 let rules = create_rules(
912 r#"
913 macro_rules! foo {
914 ($ i:meta) => (
915 #[$ i]
916 fn bar() {}
917 )
918 }
919"#,
920 );
921 assert_expansion(
922 &rules,
923 r#"foo! { cfg(target_os = "windows") }"#,
924 r#"# [cfg (target_os = "windows")] fn bar () {}"#,
925 );
926 }
927
928 #[test]
929 // fn test_tt_block() {
930 // let rules = create_rules(
931 // r#"
932 // macro_rules! foo {
933 // ($ i:tt) => { fn foo() $ i }
934 // }
935 // "#,
936 // );
937 // assert_expansion(&rules, r#"foo! { { 1; } }"#, r#"fn foo () {1 ;}"#);
938 // }
939
940 // #[test]
941 // fn test_tt_group() {
942 // let rules = create_rules(
943 // r#"
944 // macro_rules! foo {
945 // ($($ i:tt)*) => { $($ i)* }
946 // }
947 // "#,
948 // );
949 // assert_expansion(&rules, r#"foo! { fn foo() {} }"#, r#"fn foo () {}"#);
950 // }
951 #[test]
952 fn test_lifetime() {
953 let rules = create_rules(
954 r#"
955 macro_rules! foo {
956 ($ lt:lifetime) => { struct Ref<$ lt>{ s: &$ lt str } }
957 }
958"#,
959 );
960 assert_expansion(&rules, r#"foo!{'a}"#, r#"struct Ref <'a > {s : &'a str}"#);
961 }
962
963 #[test]
964 fn test_literal() {
965 let rules = create_rules(
966 r#"
967 macro_rules! foo {
968 ($ type:ty $ lit:literal) => { const VALUE: $ type = $ lit;};
969 }
970"#,
971 );
972 assert_expansion(&rules, r#"foo!(u8 0)"#, r#"const VALUE : u8 = 0 ;"#);
973 }
974
975 #[test]
976 fn test_vis() {
977 let rules = create_rules(
978 r#"
979 macro_rules! foo {
980 ($ vis:vis $ name:ident) => { $ vis fn $ name() {}};
981 }
982"#,
983 );
984 assert_expansion(&rules, r#"foo!(pub foo);"#, r#"pub fn foo () {}"#);
985 }
986
987 // The following tests are based on real world situations
988 #[test]
989 fn test_vec() {
990 let rules = create_rules(
991 r#"
992 macro_rules! vec {
993 ($($item:expr),*) => {
994 {
995 let mut v = Vec::new();
996 $(
997 v.push($item);
998 )*
999 v
1000 }
1001 };
1002}
1003"#,
1004 );
1005 assert_expansion(&rules, r#"vec!();"#, r#"{let mut v = Vec :: new () ; v}"#);
1006 assert_expansion(
1007 &rules,
1008 r#"vec![1u32,2]"#,
1009 r#"{let mut v = Vec :: new () ; v . push (1u32) ; v . push (2) ; v}"#,
1010 );
1011
1012 assert_eq!(
1013 expand_to_expr(&rules, r#"vec![1u32,2]"#).syntax().debug_dump().trim(),
1014 r#"BLOCK_EXPR@[0; 45)
1015 BLOCK@[0; 45)
1016 L_CURLY@[0; 1) "{"
1017 LET_STMT@[1; 20)
1018 LET_KW@[1; 4) "let"
1019 BIND_PAT@[4; 8)
1020 MUT_KW@[4; 7) "mut"
1021 NAME@[7; 8)
1022 IDENT@[7; 8) "v"
1023 EQ@[8; 9) "="
1024 CALL_EXPR@[9; 19)
1025 PATH_EXPR@[9; 17)
1026 PATH@[9; 17)
1027 PATH@[9; 12)
1028 PATH_SEGMENT@[9; 12)
1029 NAME_REF@[9; 12)
1030 IDENT@[9; 12) "Vec"
1031 COLONCOLON@[12; 14) "::"
1032 PATH_SEGMENT@[14; 17)
1033 NAME_REF@[14; 17)
1034 IDENT@[14; 17) "new"
1035 ARG_LIST@[17; 19)
1036 L_PAREN@[17; 18) "("
1037 R_PAREN@[18; 19) ")"
1038 SEMI@[19; 20) ";"
1039 EXPR_STMT@[20; 33)
1040 METHOD_CALL_EXPR@[20; 32)
1041 PATH_EXPR@[20; 21)
1042 PATH@[20; 21)
1043 PATH_SEGMENT@[20; 21)
1044 NAME_REF@[20; 21)
1045 IDENT@[20; 21) "v"
1046 DOT@[21; 22) "."
1047 NAME_REF@[22; 26)
1048 IDENT@[22; 26) "push"
1049 ARG_LIST@[26; 32)
1050 L_PAREN@[26; 27) "("
1051 LITERAL@[27; 31)
1052 INT_NUMBER@[27; 31) "1u32"
1053 R_PAREN@[31; 32) ")"
1054 SEMI@[32; 33) ";"
1055 EXPR_STMT@[33; 43)
1056 METHOD_CALL_EXPR@[33; 42)
1057 PATH_EXPR@[33; 34)
1058 PATH@[33; 34)
1059 PATH_SEGMENT@[33; 34)
1060 NAME_REF@[33; 34)
1061 IDENT@[33; 34) "v"
1062 DOT@[34; 35) "."
1063 NAME_REF@[35; 39)
1064 IDENT@[35; 39) "push"
1065 ARG_LIST@[39; 42)
1066 L_PAREN@[39; 40) "("
1067 LITERAL@[40; 41)
1068 INT_NUMBER@[40; 41) "2"
1069 R_PAREN@[41; 42) ")"
1070 SEMI@[42; 43) ";"
1071 PATH_EXPR@[43; 44)
1072 PATH@[43; 44)
1073 PATH_SEGMENT@[43; 44)
1074 NAME_REF@[43; 44)
1075 IDENT@[43; 44) "v"
1076 R_CURLY@[44; 45) "}""#
1077 );
1078 }
1079
1080 #[test]
1081 fn test_winapi_struct() {
1082 // from https://github.com/retep998/winapi-rs/blob/a7ef2bca086aae76cf6c4ce4c2552988ed9798ad/src/macros.rs#L366
1083
1084 let rules = create_rules(
1085 r#"
1086macro_rules! STRUCT {
1087 ($(#[$attrs:meta])* struct $name:ident {
1088 $($field:ident: $ftype:ty,)+
1089 }) => (
1090 #[repr(C)] #[derive(Copy)] $(#[$attrs])*
1091 pub struct $name {
1092 $(pub $field: $ftype,)+
1093 }
1094 impl Clone for $name {
1095 #[inline]
1096 fn clone(&self) -> $name { *self }
1097 }
1098 #[cfg(feature = "impl-default")]
1099 impl Default for $name {
1100 #[inline]
1101 fn default() -> $name { unsafe { $crate::_core::mem::zeroed() } }
1102 }
1103 );
1104}
1105"#,
1106 );
1107 // from https://github.com/retep998/winapi-rs/blob/a7ef2bca086aae76cf6c4ce4c2552988ed9798ad/src/shared/d3d9caps.rs
1108 assert_expansion(&rules, r#"STRUCT!{struct D3DVSHADERCAPS2_0 {Caps: u8,}}"#,
1109 "# [repr (C)] # [derive (Copy)] pub struct D3DVSHADERCAPS2_0 {pub Caps : u8 ,} impl Clone for D3DVSHADERCAPS2_0 {# [inline] fn clone (& self) -> D3DVSHADERCAPS2_0 {* self}} # [cfg (feature = \"impl-default\")] impl Default for D3DVSHADERCAPS2_0 {# [inline] fn default () -> D3DVSHADERCAPS2_0 {unsafe {$crate :: _core :: mem :: zeroed ()}}}");
1110 assert_expansion(&rules, r#"STRUCT!{#[cfg_attr(target_arch = "x86", repr(packed))] struct D3DCONTENTPROTECTIONCAPS {Caps : u8 ,}}"#,
1111 "# [repr (C)] # [derive (Copy)] # [cfg_attr (target_arch = \"x86\" , repr (packed))] pub struct D3DCONTENTPROTECTIONCAPS {pub Caps : u8 ,} impl Clone for D3DCONTENTPROTECTIONCAPS {# [inline] fn clone (& self) -> D3DCONTENTPROTECTIONCAPS {* self}} # [cfg (feature = \"impl-default\")] impl Default for D3DCONTENTPROTECTIONCAPS {# [inline] fn default () -> D3DCONTENTPROTECTIONCAPS {unsafe {$crate :: _core :: mem :: zeroed ()}}}");
1112 }
1113
1114 #[test]
1115 fn test_int_base() {
1116 let rules = create_rules(
1117 r#"
1118macro_rules! int_base {
1119 ($Trait:ident for $T:ident as $U:ident -> $Radix:ident) => {
1120 #[stable(feature = "rust1", since = "1.0.0")]
1121 impl fmt::$Trait for $T {
1122 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
1123 $Radix.fmt_int(*self as $U, f)
1124 }
1125 }
1126 }
1127}
1128"#,
1129 );
1130
1131 assert_expansion(&rules, r#" int_base!{Binary for isize as usize -> Binary}"#,
1132 "# [stable (feature = \"rust1\" , since = \"1.0.0\")] impl fmt ::Binary for isize {fn fmt (& self , f : & mut fmt :: Formatter < \'_ >) -> fmt :: Result {Binary . fmt_int (* self as usize , f)}}"
1133 );
1134 }
1135
1136 #[test]
1137 fn test_generate_pattern_iterators() {
1138 // from https://github.com/rust-lang/rust/blob/316a391dcb7d66dc25f1f9a4ec9d368ef7615005/src/libcore/str/mod.rs
1139 let rules = create_rules(
1140 r#"
1141macro_rules! generate_pattern_iterators {
1142 { double ended; with $(#[$common_stability_attribute:meta])*,
1143 $forward_iterator:ident,
1144 $reverse_iterator:ident, $iterty:ty
1145 } => {
1146 fn foo(){}
1147 }
1148}
1149"#,
1150 );
1151
1152 assert_expansion(&rules, r#"generate_pattern_iterators ! ( double ended ; with # [ stable ( feature = "rust1" , since = "1.0.0" ) ] , Split , RSplit , & 'a str )"#,
1153 "fn foo () {}");
1154 }
1155
1156 #[test]
1157 fn test_impl_fn_for_zst() {
1158 // from https://github.com/rust-lang/rust/blob/5d20ff4d2718c820632b38c1e49d4de648a9810b/src/libcore/internal_macros.rs
1159 let rules = create_rules(
1160 r#"
1161macro_rules! impl_fn_for_zst {
1162 { $( $( #[$attr: meta] )*
1163 struct $Name: ident impl$( <$( $lifetime : lifetime ),+> )? Fn =
1164 |$( $arg: ident: $ArgTy: ty ),*| -> $ReturnTy: ty
1165$body: block; )+
1166 } => {
1167 $(
1168 $( #[$attr] )*
1169 struct $Name;
1170
1171 impl $( <$( $lifetime ),+> )? Fn<($( $ArgTy, )*)> for $Name {
1172 #[inline]
1173 extern "rust-call" fn call(&self, ($( $arg, )*): ($( $ArgTy, )*)) -> $ReturnTy {
1174 $body
1175 }
1176 }
1177
1178 impl $( <$( $lifetime ),+> )? FnMut<($( $ArgTy, )*)> for $Name {
1179 #[inline]
1180 extern "rust-call" fn call_mut(
1181 &mut self,
1182 ($( $arg, )*): ($( $ArgTy, )*)
1183 ) -> $ReturnTy {
1184 Fn::call(&*self, ($( $arg, )*))
1185 }
1186 }
1187
1188 impl $( <$( $lifetime ),+> )? FnOnce<($( $ArgTy, )*)> for $Name {
1189 type Output = $ReturnTy;
1190
1191 #[inline]
1192 extern "rust-call" fn call_once(self, ($( $arg, )*): ($( $ArgTy, )*)) -> $ReturnTy {
1193 Fn::call(&self, ($( $arg, )*))
1194 }
1195 }
1196 )+
1197}
1198 }
1199}
1200"#,
1201 );
1202
1203 assert_expansion(&rules, r#"
1204impl_fn_for_zst ! {
1205 # [ derive ( Clone ) ]
1206 struct CharEscapeDebugContinue impl Fn = | c : char | -> char :: EscapeDebug {
1207 c . escape_debug_ext ( false )
1208 } ;
1209
1210 # [ derive ( Clone ) ]
1211 struct CharEscapeUnicode impl Fn = | c : char | -> char :: EscapeUnicode {
1212 c . escape_unicode ( )
1213 } ;
1214 # [ derive ( Clone ) ]
1215 struct CharEscapeDefault impl Fn = | c : char | -> char :: EscapeDefault {
1216 c . escape_default ( )
1217 } ;
1218 }
1219"#,
1220 "# [derive (Clone)] struct CharEscapeDebugContinue ; impl Fn < (char ,) > for CharEscapeDebugContinue {# [inline] extern \"rust-call\" fn call (& self , (c ,) : (char ,)) -> char :: EscapeDebug {{c . escape_debug_ext (false)}}} impl FnMut < (char ,) > for CharEscapeDebugContinue {# [inline] extern \"rust-call\" fn call_mut (& mut self , (c ,) : (char ,)) -> char :: EscapeDebug {Fn :: call (&* self , (c ,))}} impl FnOnce < (char ,) > for CharEscapeDebugContinue {type Output = char :: EscapeDebug ; # [inline] extern \"rust-call\" fn call_once (self , (c ,) : (char ,)) -> char :: EscapeDebug {Fn :: call (& self , (c ,))}} # [derive (Clone)] struct CharEscapeUnicode ; impl Fn < (char ,) > for CharEscapeUnicode {# [inline] extern \"rust-call\" fn call (& self , (c ,) : (char ,)) -> char :: EscapeUnicode {{c . escape_unicode ()}}} impl FnMut < (char ,) > for CharEscapeUnicode {# [inline] extern \"rust-call\" fn call_mut (& mut self , (c ,) : (char ,)) -> char :: EscapeUnicode {Fn :: call (&* self , (c ,))}} impl FnOnce < (char ,) > for CharEscapeUnicode {type Output = char :: EscapeUnicode ; # [inline] extern \"rust-call\" fn call_once (self , (c ,) : (char ,)) -> char :: EscapeUnicode {Fn :: call (& self , (c ,))}} # [derive (Clone)] struct CharEscapeDefault ; impl Fn < (char ,) > for CharEscapeDefault {# [inline] extern \"rust-call\" fn call (& self , (c ,) : (char ,)) -> char :: EscapeDefault {{c . escape_default ()}}} impl FnMut < (char ,) > for CharEscapeDefault {# [inline] extern \"rust-call\" fn call_mut (& mut self , (c ,) : (char ,)) -> char :: EscapeDefault {Fn :: call (&* self , (c ,))}} impl FnOnce < (char ,) > for CharEscapeDefault {type Output = char :: EscapeDefault ; # [inline] extern \"rust-call\" fn call_once (self , (c ,) : (char ,)) -> char :: EscapeDefault {Fn :: call (& self , (c ,))}}");
1221 }
1222
1223 #[test]
1224 fn test_impl_nonzero_fmt() {
1225 // from https://github.com/rust-lang/rust/blob/316a391dcb7d66dc25f1f9a4ec9d368ef7615005/src/libcore/num/mod.rs#L12
1226 let rules = create_rules(
1227 r#"
1228 macro_rules! impl_nonzero_fmt {
1229 ( #[$stability: meta] ( $( $Trait: ident ),+ ) for $Ty: ident ) => {
1230 fn foo() {}
1231 }
1232 }
1233"#,
1234 );
1235
1236 assert_expansion(&rules, r#"impl_nonzero_fmt ! { # [ stable ( feature = "nonzero" , since = "1.28.0" ) ] ( Debug , Display , Binary , Octal , LowerHex , UpperHex ) for NonZeroU8 }"#,
1237 "fn foo () {}");
1238 }
1239
1240 #[test]
1241 fn test_cfg_if_items() {
1242 // from https://github.com/rust-lang/rust/blob/33fe1131cadba69d317156847be9a402b89f11bb/src/libstd/macros.rs#L986
1243 let rules = create_rules(
1244 r#"
1245 macro_rules! __cfg_if_items {
1246 (($($not:meta,)*) ; ) => {};
1247 (($($not:meta,)*) ; ( ($($m:meta),*) ($($it:item)*) ), $($rest:tt)*) => {
1248 __cfg_if_items! { ($($not,)* $($m,)*) ; $($rest)* }
1249 }
1250 }
1251"#,
1252 );
1253
1254 assert_expansion(&rules, r#"__cfg_if_items ! { ( rustdoc , ) ; ( ( ) ( # [ cfg ( any ( target_os = "redox" , unix ) ) ] # [ stable ( feature = "rust1" , since = "1.0.0" ) ] pub use sys :: ext as unix ; # [ cfg ( windows ) ] # [ stable ( feature = "rust1" , since = "1.0.0" ) ] pub use sys :: ext as windows ; # [ cfg ( any ( target_os = "linux" , target_os = "l4re" ) ) ] pub mod linux ; ) ) , }"#,
1255 "__cfg_if_items ! {(rustdoc , ) ; }");
1256 }
1257
1258 #[test]
1259 fn test_cfg_if_main() {
1260 // from https://github.com/rust-lang/rust/blob/3d211248393686e0f73851fc7548f6605220fbe1/src/libpanic_unwind/macros.rs#L9
1261 let rules = create_rules(
1262 r#"
1263 macro_rules! cfg_if {
1264 ($(
1265 if #[cfg($($meta:meta),*)] { $($it:item)* }
1266 ) else * else {
1267 $($it2:item)*
1268 }) => {
1269 __cfg_if_items! {
1270 () ;
1271 $( ( ($($meta),*) ($($it)*) ), )*
1272 ( () ($($it2)*) ),
1273 }
1274 }
1275 }
1276"#,
1277 );
1278
1279 assert_expansion(&rules, r#"
1280cfg_if ! {
1281 if # [ cfg ( target_env = "msvc" ) ] {
1282 // no extra unwinder support needed
1283 } else if # [ cfg ( all ( target_arch = "wasm32" , not ( target_os = "emscripten" ) ) ) ] {
1284 // no unwinder on the system!
1285 } else {
1286 mod libunwind ;
1287 pub use libunwind :: * ;
1288 }
1289 }
1290"#,
1291 "__cfg_if_items ! {() ; ((target_env = \"msvc\") ()) , ((all (target_arch = \"wasm32\" , not (target_os = \"emscripten\"))) ()) , (() (mod libunwind ; pub use libunwind :: * ;)) ,}");
1292 }
1293}
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-04 12:48:28 +0100