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1use ra_syntax::{ast, AstNode};
2
3use super::*;
4
5// Good first issue (although a slightly challenging one):
6//
7// * Pick a random test from here
8// https://github.com/intellij-rust/intellij-rust/blob/c4e9feee4ad46e7953b1948c112533360b6087bb/src/test/kotlin/org/rust/lang/core/macros/RsMacroExpansionTest.kt
9// * Port the test to rust and add it to this module
10// * Make it pass :-)
11
12#[test]
13fn test_convert_tt() {
14 let macro_definition = r#"
15macro_rules! impl_froms {
16 ($e:ident: $($v:ident),*) => {
17 $(
18 impl From<$v> for $e {
19 fn from(it: $v) -> $e {
20 $e::$v(it)
21 }
22 }
23 )*
24 }
25}
26"#;
27
28 let macro_invocation = r#"
29impl_froms!(TokenTree: Leaf, Subtree);
30"#;
31
32 let source_file = ast::SourceFile::parse(macro_definition);
33 let macro_definition =
34 source_file.syntax().descendants().find_map(ast::MacroCall::cast).unwrap();
35
36 let source_file = ast::SourceFile::parse(macro_invocation);
37 let macro_invocation =
38 source_file.syntax().descendants().find_map(ast::MacroCall::cast).unwrap();
39
40 let (definition_tt, _) = ast_to_token_tree(macro_definition.token_tree().unwrap()).unwrap();
41 let (invocation_tt, _) = ast_to_token_tree(macro_invocation.token_tree().unwrap()).unwrap();
42 let rules = crate::MacroRules::parse(&definition_tt).unwrap();
43 let expansion = rules.expand(&invocation_tt).unwrap();
44 assert_eq!(
45 expansion.to_string(),
46 "impl From <Leaf > for TokenTree {fn from (it : Leaf) -> TokenTree {TokenTree ::Leaf (it)}} \
47 impl From <Subtree > for TokenTree {fn from (it : Subtree) -> TokenTree {TokenTree ::Subtree (it)}}"
48 )
49}
50
51pub(crate) fn create_rules(macro_definition: &str) -> MacroRules {
52 let source_file = ast::SourceFile::parse(macro_definition);
53 let macro_definition =
54 source_file.syntax().descendants().find_map(ast::MacroCall::cast).unwrap();
55
56 let (definition_tt, _) = ast_to_token_tree(macro_definition.token_tree().unwrap()).unwrap();
57 crate::MacroRules::parse(&definition_tt).unwrap()
58}
59
60pub(crate) fn expand(rules: &MacroRules, invocation: &str) -> tt::Subtree {
61 let source_file = ast::SourceFile::parse(invocation);
62 let macro_invocation =
63 source_file.syntax().descendants().find_map(ast::MacroCall::cast).unwrap();
64
65 let (invocation_tt, _) = ast_to_token_tree(macro_invocation.token_tree().unwrap()).unwrap();
66
67 rules.expand(&invocation_tt).unwrap()
68}
69
70pub(crate) fn expand_to_items(
71 rules: &MacroRules,
72 invocation: &str,
73) -> ra_syntax::TreeArc<ast::MacroItems> {
74 let expanded = expand(rules, invocation);
75 token_tree_to_macro_items(&expanded).unwrap()
76}
77
78#[allow(unused)]
79pub(crate) fn expand_to_stmts(
80 rules: &MacroRules,
81 invocation: &str,
82) -> ra_syntax::TreeArc<ast::MacroStmts> {
83 let expanded = expand(rules, invocation);
84 token_tree_to_macro_stmts(&expanded).unwrap()
85}
86
87pub(crate) fn expand_to_expr(
88 rules: &MacroRules,
89 invocation: &str,
90) -> ra_syntax::TreeArc<ast::Expr> {
91 let expanded = expand(rules, invocation);
92 token_tree_to_expr(&expanded).unwrap()
93}
94
95pub(crate) fn text_to_tokentree(text: &str) -> tt::Subtree {
96 // wrap the given text to a macro call
97 let wrapped = format!("wrap_macro!( {} )", text);
98 let wrapped = ast::SourceFile::parse(&wrapped);
99 let wrapped = wrapped.syntax().descendants().find_map(ast::TokenTree::cast).unwrap();
100 let mut wrapped = ast_to_token_tree(wrapped).unwrap().0;
101 wrapped.delimiter = tt::Delimiter::None;
102
103 wrapped
104}
105
106pub(crate) enum MacroKind {
107 Items,
108 Stmts,
109}
110
111use ra_syntax::WalkEvent;
112
113pub fn debug_dump_ignore_spaces(node: &ra_syntax::SyntaxNode) -> String {
114 use std::fmt::Write;
115
116 let mut level = 0;
117 let mut buf = String::new();
118 macro_rules! indent {
119 () => {
120 for _ in 0..level {
121 buf.push_str(" ");
122 }
123 };
124 }
125
126 for event in node.preorder_with_tokens() {
127 match event {
128 WalkEvent::Enter(element) => {
129 match element {
130 ra_syntax::SyntaxElement::Node(node) => {
131 indent!();
132 writeln!(buf, "{:?}", node.kind()).unwrap();
133 }
134 ra_syntax::SyntaxElement::Token(token) => match token.kind() {
135 ra_syntax::SyntaxKind::WHITESPACE => {}
136 _ => {
137 indent!();
138 writeln!(buf, "{:?}", token.kind()).unwrap();
139 }
140 },
141 }
142 level += 1;
143 }
144 WalkEvent::Leave(_) => level -= 1,
145 }
146 }
147
148 buf
149}
150
151pub(crate) fn assert_expansion(
152 kind: MacroKind,
153 rules: &MacroRules,
154 invocation: &str,
155 expected: &str,
156) -> tt::Subtree {
157 let expanded = expand(rules, invocation);
158 assert_eq!(expanded.to_string(), expected);
159
160 let expected = expected.replace("$crate", "C_C__C");
161
162 // wrap the given text to a macro call
163 let expected = text_to_tokentree(&expected);
164
165 let (expanded_tree, expected_tree) = match kind {
166 MacroKind::Items => {
167 let expanded_tree = token_tree_to_macro_items(&expanded);
168 let expected_tree = token_tree_to_macro_items(&expected);
169
170 (
171 debug_dump_ignore_spaces(expanded_tree.unwrap().syntax()).trim().to_string(),
172 debug_dump_ignore_spaces(expected_tree.unwrap().syntax()).trim().to_string(),
173 )
174 }
175
176 MacroKind::Stmts => {
177 let expanded_tree = token_tree_to_macro_stmts(&expanded);
178 let expected_tree = token_tree_to_macro_stmts(&expected);
179
180 (
181 debug_dump_ignore_spaces(expanded_tree.unwrap().syntax()).trim().to_string(),
182 debug_dump_ignore_spaces(expected_tree.unwrap().syntax()).trim().to_string(),
183 )
184 }
185 };
186
187 let expected_tree = expected_tree.replace("C_C__C", "$crate");
188 assert_eq!(
189 expanded_tree, expected_tree,
190 "left => {}\nright => {}",
191 expanded_tree, expected_tree,
192 );
193
194 expanded
195}
196
197#[test]
198fn test_fail_match_pattern_by_first_token() {
199 let rules = create_rules(
200 r#"
201 macro_rules! foo {
202 ($ i:ident) => (
203 mod $ i {}
204 );
205 (= $ i:ident) => (
206 fn $ i() {}
207 );
208 (+ $ i:ident) => (
209 struct $ i;
210 )
211 }
212"#,
213 );
214
215 assert_expansion(MacroKind::Items, &rules, "foo! { foo }", "mod foo {}");
216 assert_expansion(MacroKind::Items, &rules, "foo! { = bar }", "fn bar () {}");
217 assert_expansion(MacroKind::Items, &rules, "foo! { + Baz }", "struct Baz ;");
218}
219
220#[test]
221fn test_fail_match_pattern_by_last_token() {
222 let rules = create_rules(
223 r#"
224 macro_rules! foo {
225 ($ i:ident) => (
226 mod $ i {}
227 );
228 ($ i:ident =) => (
229 fn $ i() {}
230 );
231 ($ i:ident +) => (
232 struct $ i;
233 )
234 }
235"#,
236 );
237
238 assert_expansion(MacroKind::Items, &rules, "foo! { foo }", "mod foo {}");
239 assert_expansion(MacroKind::Items, &rules, "foo! { bar = }", "fn bar () {}");
240 assert_expansion(MacroKind::Items, &rules, "foo! { Baz + }", "struct Baz ;");
241}
242
243#[test]
244fn test_fail_match_pattern_by_word_token() {
245 let rules = create_rules(
246 r#"
247 macro_rules! foo {
248 ($ i:ident) => (
249 mod $ i {}
250 );
251 (spam $ i:ident) => (
252 fn $ i() {}
253 );
254 (eggs $ i:ident) => (
255 struct $ i;
256 )
257 }
258"#,
259 );
260
261 assert_expansion(MacroKind::Items, &rules, "foo! { foo }", "mod foo {}");
262 assert_expansion(MacroKind::Items, &rules, "foo! { spam bar }", "fn bar () {}");
263 assert_expansion(MacroKind::Items, &rules, "foo! { eggs Baz }", "struct Baz ;");
264}
265
266#[test]
267fn test_match_group_pattern_by_separator_token() {
268 let rules = create_rules(
269 r#"
270 macro_rules! foo {
271 ($ ($ i:ident),*) => ($ (
272 mod $ i {}
273 )*);
274 ($ ($ i:ident)#*) => ($ (
275 fn $ i() {}
276 )*);
277 ($ i:ident ,# $ j:ident) => (
278 struct $ i;
279 struct $ j;
280 )
281 }
282"#,
283 );
284
285 assert_expansion(MacroKind::Items, &rules, "foo! { foo, bar }", "mod foo {} mod bar {}");
286 assert_expansion(MacroKind::Items, &rules, "foo! { foo# bar }", "fn foo () {} fn bar () {}");
287 assert_expansion(MacroKind::Items, &rules, "foo! { Foo,# Bar }", "struct Foo ; struct Bar ;");
288}
289
290#[test]
291fn test_match_group_pattern_with_multiple_defs() {
292 let rules = create_rules(
293 r#"
294 macro_rules! foo {
295 ($ ($ i:ident),*) => ( struct Bar { $ (
296 fn $ i {}
297 )*} );
298 }
299"#,
300 );
301
302 assert_expansion(
303 MacroKind::Items,
304 &rules,
305 "foo! { foo, bar }",
306 "struct Bar {fn foo {} fn bar {}}",
307 );
308}
309
310#[test]
311fn test_match_group_pattern_with_multiple_statement() {
312 let rules = create_rules(
313 r#"
314 macro_rules! foo {
315 ($ ($ i:ident),*) => ( fn baz { $ (
316 $ i ();
317 )*} );
318 }
319"#,
320 );
321
322 assert_expansion(MacroKind::Items, &rules, "foo! { foo, bar }", "fn baz {foo () ; bar () ;}");
323}
324
325#[test]
326fn test_match_group_pattern_with_multiple_statement_without_semi() {
327 let rules = create_rules(
328 r#"
329 macro_rules! foo {
330 ($ ($ i:ident),*) => ( fn baz { $ (
331 $i()
332 );*} );
333 }
334"#,
335 );
336
337 assert_expansion(MacroKind::Items, &rules, "foo! { foo, bar }", "fn baz {foo () ;bar ()}");
338}
339
340#[test]
341fn test_match_group_empty_fixed_token() {
342 let rules = create_rules(
343 r#"
344 macro_rules! foo {
345 ($ ($ i:ident)* #abc) => ( fn baz { $ (
346 $ i ();
347 )*} );
348 }
349"#,
350 );
351
352 assert_expansion(MacroKind::Items, &rules, "foo! {#abc}", "fn baz {}");
353}
354
355#[test]
356fn test_match_group_in_subtree() {
357 let rules = create_rules(
358 r#"
359 macro_rules! foo {
360 (fn $name:ident {$($i:ident)*} ) => ( fn $name() { $ (
361 $ i ();
362 )*} );
363 }"#,
364 );
365
366 assert_expansion(MacroKind::Items, &rules, "foo! {fn baz {a b} }", "fn baz () {a () ; b () ;}");
367}
368
369#[test]
370fn test_match_group_with_multichar_sep() {
371 let rules = create_rules(
372 r#"
373 macro_rules! foo {
374 (fn $name:ident {$($i:literal)*} ) => ( fn $name() -> bool { $($i)&&*} );
375 }"#,
376 );
377
378 assert_expansion(
379 MacroKind::Items,
380 &rules,
381 "foo! (fn baz {true true} )",
382 "fn baz () -> bool {true &&true}",
383 );
384}
385
386#[test]
387fn test_match_group_zero_match() {
388 let rules = create_rules(
389 r#"
390 macro_rules! foo {
391 ( $($i:ident)* ) => ();
392 }"#,
393 );
394
395 assert_expansion(MacroKind::Items, &rules, "foo! ()", "");
396}
397
398#[test]
399fn test_match_group_in_group() {
400 let rules = create_rules(
401 r#"
402 macro_rules! foo {
403 { $( ( $($i:ident)* ) )* } => ( $( ( $($i)* ) )* );
404 }"#,
405 );
406
407 assert_expansion(MacroKind::Items, &rules, "foo! ( (a b) )", "(a b)");
408}
409
410#[test]
411fn test_expand_to_item_list() {
412 let rules = create_rules(
413 "
414 macro_rules! structs {
415 ($($i:ident),*) => {
416 $(struct $i { field: u32 } )*
417 }
418 }
419 ",
420 );
421 let expansion = expand(&rules, "structs!(Foo, Bar)");
422 let tree = token_tree_to_macro_items(&expansion);
423 assert_eq!(
424 tree.unwrap().syntax().debug_dump().trim(),
425 r#"
426MACRO_ITEMS@[0; 40)
427 STRUCT_DEF@[0; 20)
428 STRUCT_KW@[0; 6) "struct"
429 NAME@[6; 9)
430 IDENT@[6; 9) "Foo"
431 NAMED_FIELD_DEF_LIST@[9; 20)
432 L_CURLY@[9; 10) "{"
433 NAMED_FIELD_DEF@[10; 19)
434 NAME@[10; 15)
435 IDENT@[10; 15) "field"
436 COLON@[15; 16) ":"
437 PATH_TYPE@[16; 19)
438 PATH@[16; 19)
439 PATH_SEGMENT@[16; 19)
440 NAME_REF@[16; 19)
441 IDENT@[16; 19) "u32"
442 R_CURLY@[19; 20) "}"
443 STRUCT_DEF@[20; 40)
444 STRUCT_KW@[20; 26) "struct"
445 NAME@[26; 29)
446 IDENT@[26; 29) "Bar"
447 NAMED_FIELD_DEF_LIST@[29; 40)
448 L_CURLY@[29; 30) "{"
449 NAMED_FIELD_DEF@[30; 39)
450 NAME@[30; 35)
451 IDENT@[30; 35) "field"
452 COLON@[35; 36) ":"
453 PATH_TYPE@[36; 39)
454 PATH@[36; 39)
455 PATH_SEGMENT@[36; 39)
456 NAME_REF@[36; 39)
457 IDENT@[36; 39) "u32"
458 R_CURLY@[39; 40) "}""#
459 .trim()
460 );
461}
462
463#[test]
464fn test_expand_literals_to_token_tree() {
465 fn to_subtree(tt: &tt::TokenTree) -> &tt::Subtree {
466 if let tt::TokenTree::Subtree(subtree) = tt {
467 return &subtree;
468 }
469 unreachable!("It is not a subtree");
470 }
471
472 fn to_literal(tt: &tt::TokenTree) -> &tt::Literal {
473 if let tt::TokenTree::Leaf(tt::Leaf::Literal(lit)) = tt {
474 return lit;
475 }
476 unreachable!("It is not a literal");
477 }
478
479 let rules = create_rules(
480 r#"
481 macro_rules! literals {
482 ($i:ident) => {
483 {
484 let a = 'c';
485 let c = 1000;
486 let f = 12E+99_f64;
487 let s = "rust1";
488 }
489 }
490 }
491 "#,
492 );
493 let expansion = expand(&rules, "literals!(foo)");
494 let stm_tokens = &to_subtree(&expansion.token_trees[0]).token_trees;
495
496 // [let] [a] [=] ['c'] [;]
497 assert_eq!(to_literal(&stm_tokens[3]).text, "'c'");
498 // [let] [c] [=] [1000] [;]
499 assert_eq!(to_literal(&stm_tokens[5 + 3]).text, "1000");
500 // [let] [f] [=] [12E+99_f64] [;]
501 assert_eq!(to_literal(&stm_tokens[10 + 3]).text, "12E+99_f64");
502 // [let] [s] [=] ["rust1"] [;]
503 assert_eq!(to_literal(&stm_tokens[15 + 3]).text, "\"rust1\"");
504}
505
506#[test]
507fn test_two_idents() {
508 let rules = create_rules(
509 r#"
510 macro_rules! foo {
511 ($ i:ident, $ j:ident) => {
512 fn foo() { let a = $ i; let b = $j; }
513 }
514 }
515"#,
516 );
517 assert_expansion(
518 MacroKind::Items,
519 &rules,
520 "foo! { foo, bar }",
521 "fn foo () {let a = foo ; let b = bar ;}",
522 );
523}
524
525#[test]
526fn test_tt_to_stmts() {
527 let rules = create_rules(
528 r#"
529 macro_rules! foo {
530 () => {
531 let a = 0;
532 a = 10 + 1;
533 a
534 }
535 }
536"#,
537 );
538
539 let expanded = expand(&rules, "foo!{}");
540 let stmts = token_tree_to_macro_stmts(&expanded);
541
542 assert_eq!(
543 stmts.unwrap().syntax().debug_dump().trim(),
544 r#"MACRO_STMTS@[0; 15)
545 LET_STMT@[0; 7)
546 LET_KW@[0; 3) "let"
547 BIND_PAT@[3; 4)
548 NAME@[3; 4)
549 IDENT@[3; 4) "a"
550 EQ@[4; 5) "="
551 LITERAL@[5; 6)
552 INT_NUMBER@[5; 6) "0"
553 SEMI@[6; 7) ";"
554 EXPR_STMT@[7; 14)
555 BIN_EXPR@[7; 13)
556 PATH_EXPR@[7; 8)
557 PATH@[7; 8)
558 PATH_SEGMENT@[7; 8)
559 NAME_REF@[7; 8)
560 IDENT@[7; 8) "a"
561 EQ@[8; 9) "="
562 BIN_EXPR@[9; 13)
563 LITERAL@[9; 11)
564 INT_NUMBER@[9; 11) "10"
565 PLUS@[11; 12) "+"
566 LITERAL@[12; 13)
567 INT_NUMBER@[12; 13) "1"
568 SEMI@[13; 14) ";"
569 EXPR_STMT@[14; 15)
570 PATH_EXPR@[14; 15)
571 PATH@[14; 15)
572 PATH_SEGMENT@[14; 15)
573 NAME_REF@[14; 15)
574 IDENT@[14; 15) "a""#,
575 );
576}
577
578// The following tests are port from intellij-rust directly
579// https://github.com/intellij-rust/intellij-rust/blob/c4e9feee4ad46e7953b1948c112533360b6087bb/src/test/kotlin/org/rust/lang/core/macros/RsMacroExpansionTest.kt
580
581#[test]
582fn test_path() {
583 let rules = create_rules(
584 r#"
585 macro_rules! foo {
586 ($ i:path) => {
587 fn foo() { let a = $ i; }
588 }
589 }
590"#,
591 );
592 assert_expansion(MacroKind::Items, &rules, "foo! { foo }", "fn foo () {let a = foo ;}");
593 assert_expansion(
594 MacroKind::Items,
595 &rules,
596 "foo! { bar::<u8>::baz::<u8> }",
597 "fn foo () {let a = bar ::< u8 >:: baz ::< u8 > ;}",
598 );
599}
600
601#[test]
602fn test_two_paths() {
603 let rules = create_rules(
604 r#"
605 macro_rules! foo {
606 ($ i:path, $ j:path) => {
607 fn foo() { let a = $ i; let b = $j; }
608 }
609 }
610"#,
611 );
612 assert_expansion(
613 MacroKind::Items,
614 &rules,
615 "foo! { foo, bar }",
616 "fn foo () {let a = foo ; let b = bar ;}",
617 );
618}
619
620#[test]
621fn test_path_with_path() {
622 let rules = create_rules(
623 r#"
624 macro_rules! foo {
625 ($ i:path) => {
626 fn foo() { let a = $ i :: bar; }
627 }
628 }
629"#,
630 );
631 assert_expansion(MacroKind::Items, &rules, "foo! { foo }", "fn foo () {let a = foo :: bar ;}");
632}
633
634#[test]
635fn test_expr() {
636 let rules = create_rules(
637 r#"
638 macro_rules! foo {
639 ($ i:expr) => {
640 fn bar() { $ i; }
641 }
642 }
643"#,
644 );
645
646 assert_expansion(
647 MacroKind::Items,
648 &rules,
649 "foo! { 2 + 2 * baz(3).quux() }",
650 "fn bar () {2 + 2 * baz (3) . quux () ;}",
651 );
652}
653
654#[test]
655fn test_expr_order() {
656 let rules = create_rules(
657 r#"
658 macro_rules! foo {
659 ($ i:expr) => {
660 fn bar() { $ i * 2; }
661 }
662 }
663"#,
664 );
665
666 assert_eq!(
667 expand_to_items(&rules, "foo! { 1 + 1 }").syntax().debug_dump().trim(),
668 r#"MACRO_ITEMS@[0; 15)
669 FN_DEF@[0; 15)
670 FN_KW@[0; 2) "fn"
671 NAME@[2; 5)
672 IDENT@[2; 5) "bar"
673 PARAM_LIST@[5; 7)
674 L_PAREN@[5; 6) "("
675 R_PAREN@[6; 7) ")"
676 BLOCK@[7; 15)
677 L_CURLY@[7; 8) "{"
678 EXPR_STMT@[8; 14)
679 BIN_EXPR@[8; 13)
680 BIN_EXPR@[8; 11)
681 LITERAL@[8; 9)
682 INT_NUMBER@[8; 9) "1"
683 PLUS@[9; 10) "+"
684 LITERAL@[10; 11)
685 INT_NUMBER@[10; 11) "1"
686 STAR@[11; 12) "*"
687 LITERAL@[12; 13)
688 INT_NUMBER@[12; 13) "2"
689 SEMI@[13; 14) ";"
690 R_CURLY@[14; 15) "}""#,
691 );
692}
693
694#[test]
695fn test_last_expr() {
696 let rules = create_rules(
697 r#"
698 macro_rules! vec {
699 ($($item:expr),*) => {
700 {
701 let mut v = Vec::new();
702 $(
703 v.push($item);
704 )*
705 v
706 }
707 };
708 }
709"#,
710 );
711 assert_expansion(
712 MacroKind::Items,
713 &rules,
714 "vec!(1,2,3)",
715 "{let mut v = Vec :: new () ; v . push (1) ; v . push (2) ; v . push (3) ; v}",
716 );
717}
718
719#[test]
720fn test_ty() {
721 let rules = create_rules(
722 r#"
723 macro_rules! foo {
724 ($ i:ty) => (
725 fn bar() -> $ i { unimplemented!() }
726 )
727 }
728"#,
729 );
730 assert_expansion(
731 MacroKind::Items,
732 &rules,
733 "foo! { Baz<u8> }",
734 "fn bar () -> Baz < u8 > {unimplemented ! ()}",
735 );
736}
737
738#[test]
739fn test_ty_with_complex_type() {
740 let rules = create_rules(
741 r#"
742 macro_rules! foo {
743 ($ i:ty) => (
744 fn bar() -> $ i { unimplemented!() }
745 )
746 }
747"#,
748 );
749
750 // Reference lifetime struct with generic type
751 assert_expansion(
752 MacroKind::Items,
753 &rules,
754 "foo! { &'a Baz<u8> }",
755 "fn bar () -> & 'a Baz < u8 > {unimplemented ! ()}",
756 );
757
758 // extern "Rust" func type
759 assert_expansion(
760 MacroKind::Items,
761 &rules,
762 r#"foo! { extern "Rust" fn() -> Ret }"#,
763 r#"fn bar () -> extern "Rust" fn () -> Ret {unimplemented ! ()}"#,
764 );
765}
766
767#[test]
768fn test_pat_() {
769 let rules = create_rules(
770 r#"
771 macro_rules! foo {
772 ($ i:pat) => { fn foo() { let $ i; } }
773 }
774"#,
775 );
776 assert_expansion(MacroKind::Items, &rules, "foo! { (a, b) }", "fn foo () {let (a , b) ;}");
777}
778
779#[test]
780fn test_stmt() {
781 let rules = create_rules(
782 r#"
783 macro_rules! foo {
784 ($ i:stmt) => (
785 fn bar() { $ i; }
786 )
787 }
788"#,
789 );
790 assert_expansion(MacroKind::Items, &rules, "foo! { 2 }", "fn bar () {2 ;}");
791 assert_expansion(MacroKind::Items, &rules, "foo! { let a = 0 }", "fn bar () {let a = 0 ;}");
792}
793
794#[test]
795fn test_single_item() {
796 let rules = create_rules(
797 r#"
798 macro_rules! foo {
799 ($ i:item) => (
800 $ i
801 )
802 }
803"#,
804 );
805 assert_expansion(MacroKind::Items, &rules, "foo! {mod c {}}", "mod c {}");
806}
807
808#[test]
809fn test_all_items() {
810 let rules = create_rules(
811 r#"
812 macro_rules! foo {
813 ($ ($ i:item)*) => ($ (
814 $ i
815 )*)
816 }
817"#,
818 );
819 assert_expansion(MacroKind::Items, &rules, r#"
820 foo! {
821 extern crate a;
822 mod b;
823 mod c {}
824 use d;
825 const E: i32 = 0;
826 static F: i32 = 0;
827 impl G {}
828 struct H;
829 enum I { Foo }
830 trait J {}
831 fn h() {}
832 extern {}
833 type T = u8;
834 }
835"#, 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 ;"#);
836}
837
838#[test]
839fn test_block() {
840 let rules = create_rules(
841 r#"
842 macro_rules! foo {
843 ($ i:block) => { fn foo() $ i }
844 }
845"#,
846 );
847 assert_expansion(MacroKind::Stmts, &rules, "foo! { { 1; } }", "fn foo () {1 ;}");
848}
849
850#[test]
851fn test_meta() {
852 let rules = create_rules(
853 r#"
854 macro_rules! foo {
855 ($ i:meta) => (
856 #[$ i]
857 fn bar() {}
858 )
859 }
860"#,
861 );
862 assert_expansion(
863 MacroKind::Items,
864 &rules,
865 r#"foo! { cfg(target_os = "windows") }"#,
866 r#"# [cfg (target_os = "windows")] fn bar () {}"#,
867 );
868}
869
870#[test]
871fn test_tt_block() {
872 let rules = create_rules(
873 r#"
874 macro_rules! foo {
875 ($ i:tt) => { fn foo() $ i }
876 }
877 "#,
878 );
879 assert_expansion(MacroKind::Items, &rules, r#"foo! { { 1; } }"#, r#"fn foo () {1 ;}"#);
880}
881
882#[test]
883fn test_tt_group() {
884 let rules = create_rules(
885 r#"
886 macro_rules! foo {
887 ($($ i:tt)*) => { $($ i)* }
888 }
889 "#,
890 );
891 assert_expansion(MacroKind::Items, &rules, r#"foo! { fn foo() {} }"#, r#"fn foo () {}"#);
892}
893#[test]
894fn test_lifetime() {
895 let rules = create_rules(
896 r#"
897 macro_rules! foo {
898 ($ lt:lifetime) => { struct Ref<$ lt>{ s: &$ lt str } }
899 }
900"#,
901 );
902 assert_expansion(MacroKind::Items, &rules, r#"foo!{'a}"#, r#"struct Ref <'a > {s : &'a str}"#);
903}
904
905#[test]
906fn test_literal() {
907 let rules = create_rules(
908 r#"
909 macro_rules! foo {
910 ($ type:ty $ lit:literal) => { const VALUE: $ type = $ lit;};
911 }
912"#,
913 );
914 assert_expansion(MacroKind::Items, &rules, r#"foo!(u8 0)"#, r#"const VALUE : u8 = 0 ;"#);
915}
916
917#[test]
918fn test_vis() {
919 let rules = create_rules(
920 r#"
921 macro_rules! foo {
922 ($ vis:vis $ name:ident) => { $ vis fn $ name() {}};
923 }
924"#,
925 );
926 assert_expansion(MacroKind::Items, &rules, r#"foo!(pub foo);"#, r#"pub fn foo () {}"#);
927
928 // test optional casse
929 assert_expansion(MacroKind::Items, &rules, r#"foo!(foo);"#, r#"fn foo () {}"#);
930}
931
932#[test]
933fn test_inner_macro_rules() {
934 let rules = create_rules(
935 r#"
936macro_rules! foo {
937 ($a:ident, $b:ident, $c:tt) => {
938
939 macro_rules! bar {
940 ($bi:ident) => {
941 fn $bi() -> u8 {$c}
942 }
943 }
944
945 bar!($a);
946 fn $b() -> u8 {$c}
947 }
948}
949"#,
950 );
951 assert_expansion(
952 MacroKind::Items,
953 &rules,
954 r#"foo!(x,y, 1);"#,
955 r#"macro_rules ! bar {($ bi : ident) => {fn $ bi () -> u8 {1}}} bar ! (x) ; fn y () -> u8 {1}"#,
956 );
957}
958
959// The following tests are based on real world situations
960#[test]
961fn test_vec() {
962 let rules = create_rules(
963 r#"
964 macro_rules! vec {
965 ($($item:expr),*) => {
966 {
967 let mut v = Vec::new();
968 $(
969 v.push($item);
970 )*
971 v
972 }
973 };
974}
975"#,
976 );
977 assert_expansion(MacroKind::Items, &rules, r#"vec!();"#, r#"{let mut v = Vec :: new () ; v}"#);
978 assert_expansion(
979 MacroKind::Items,
980 &rules,
981 r#"vec![1u32,2]"#,
982 r#"{let mut v = Vec :: new () ; v . push (1u32) ; v . push (2) ; v}"#,
983 );
984
985 assert_eq!(
986 expand_to_expr(&rules, r#"vec![1u32,2]"#).syntax().debug_dump().trim(),
987 r#"BLOCK_EXPR@[0; 45)
988 BLOCK@[0; 45)
989 L_CURLY@[0; 1) "{"
990 LET_STMT@[1; 20)
991 LET_KW@[1; 4) "let"
992 BIND_PAT@[4; 8)
993 MUT_KW@[4; 7) "mut"
994 NAME@[7; 8)
995 IDENT@[7; 8) "v"
996 EQ@[8; 9) "="
997 CALL_EXPR@[9; 19)
998 PATH_EXPR@[9; 17)
999 PATH@[9; 17)
1000 PATH@[9; 12)
1001 PATH_SEGMENT@[9; 12)
1002 NAME_REF@[9; 12)
1003 IDENT@[9; 12) "Vec"
1004 COLONCOLON@[12; 14) "::"
1005 PATH_SEGMENT@[14; 17)
1006 NAME_REF@[14; 17)
1007 IDENT@[14; 17) "new"
1008 ARG_LIST@[17; 19)
1009 L_PAREN@[17; 18) "("
1010 R_PAREN@[18; 19) ")"
1011 SEMI@[19; 20) ";"
1012 EXPR_STMT@[20; 33)
1013 METHOD_CALL_EXPR@[20; 32)
1014 PATH_EXPR@[20; 21)
1015 PATH@[20; 21)
1016 PATH_SEGMENT@[20; 21)
1017 NAME_REF@[20; 21)
1018 IDENT@[20; 21) "v"
1019 DOT@[21; 22) "."
1020 NAME_REF@[22; 26)
1021 IDENT@[22; 26) "push"
1022 ARG_LIST@[26; 32)
1023 L_PAREN@[26; 27) "("
1024 LITERAL@[27; 31)
1025 INT_NUMBER@[27; 31) "1u32"
1026 R_PAREN@[31; 32) ")"
1027 SEMI@[32; 33) ";"
1028 EXPR_STMT@[33; 43)
1029 METHOD_CALL_EXPR@[33; 42)
1030 PATH_EXPR@[33; 34)
1031 PATH@[33; 34)
1032 PATH_SEGMENT@[33; 34)
1033 NAME_REF@[33; 34)
1034 IDENT@[33; 34) "v"
1035 DOT@[34; 35) "."
1036 NAME_REF@[35; 39)
1037 IDENT@[35; 39) "push"
1038 ARG_LIST@[39; 42)
1039 L_PAREN@[39; 40) "("
1040 LITERAL@[40; 41)
1041 INT_NUMBER@[40; 41) "2"
1042 R_PAREN@[41; 42) ")"
1043 SEMI@[42; 43) ";"
1044 PATH_EXPR@[43; 44)
1045 PATH@[43; 44)
1046 PATH_SEGMENT@[43; 44)
1047 NAME_REF@[43; 44)
1048 IDENT@[43; 44) "v"
1049 R_CURLY@[44; 45) "}""#
1050 );
1051}
1052
1053#[test]
1054fn test_winapi_struct() {
1055 // from https://github.com/retep998/winapi-rs/blob/a7ef2bca086aae76cf6c4ce4c2552988ed9798ad/src/macros.rs#L366
1056
1057 let rules = create_rules(
1058 r#"
1059macro_rules! STRUCT {
1060 ($(#[$attrs:meta])* struct $name:ident {
1061 $($field:ident: $ftype:ty,)+
1062 }) => (
1063 #[repr(C)] #[derive(Copy)] $(#[$attrs])*
1064 pub struct $name {
1065 $(pub $field: $ftype,)+
1066 }
1067 impl Clone for $name {
1068 #[inline]
1069 fn clone(&self) -> $name { *self }
1070 }
1071 #[cfg(feature = "impl-default")]
1072 impl Default for $name {
1073 #[inline]
1074 fn default() -> $name { unsafe { $crate::_core::mem::zeroed() } }
1075 }
1076 );
1077}
1078"#,
1079 );
1080 // from https://github.com/retep998/winapi-rs/blob/a7ef2bca086aae76cf6c4ce4c2552988ed9798ad/src/shared/d3d9caps.rs
1081 assert_expansion(MacroKind::Items, &rules, r#"STRUCT!{struct D3DVSHADERCAPS2_0 {Caps: u8,}}"#,
1082 "# [repr (C)] # [derive (Copy)] pub struct D3DVSHADERCAPS2_0 {pub Caps : u8 ,} impl Clone for D3DVSHADERCAPS2_0 {# [inline] fn clone (& self) -> D3DVSHADERCAPS2_0 {* self}} # [cfg (feature = \"impl-default\")] impl Default for D3DVSHADERCAPS2_0 {# [inline] fn default () -> D3DVSHADERCAPS2_0 {unsafe {$crate :: _core :: mem :: zeroed ()}}}");
1083 assert_expansion(MacroKind::Items, &rules, r#"STRUCT!{#[cfg_attr(target_arch = "x86", repr(packed))] struct D3DCONTENTPROTECTIONCAPS {Caps : u8 ,}}"#,
1084 "# [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 {$crate :: _core :: mem :: zeroed ()}}}");
1085}
1086
1087#[test]
1088fn test_int_base() {
1089 let rules = create_rules(
1090 r#"
1091macro_rules! int_base {
1092 ($Trait:ident for $T:ident as $U:ident -> $Radix:ident) => {
1093 #[stable(feature = "rust1", since = "1.0.0")]
1094 impl fmt::$Trait for $T {
1095 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
1096 $Radix.fmt_int(*self as $U, f)
1097 }
1098 }
1099 }
1100}
1101"#,
1102 );
1103
1104 assert_expansion(MacroKind::Items, &rules, r#" int_base!{Binary for isize as usize -> Binary}"#,
1105 "# [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)}}"
1106 );
1107}
1108
1109#[test]
1110fn test_generate_pattern_iterators() {
1111 // from https://github.com/rust-lang/rust/blob/316a391dcb7d66dc25f1f9a4ec9d368ef7615005/src/libcore/str/mod.rs
1112 let rules = create_rules(
1113 r#"
1114macro_rules! generate_pattern_iterators {
1115 { double ended; with $(#[$common_stability_attribute:meta])*,
1116 $forward_iterator:ident,
1117 $reverse_iterator:ident, $iterty:ty
1118 } => {
1119 fn foo(){}
1120 }
1121}
1122"#,
1123 );
1124
1125 assert_expansion(MacroKind::Items, &rules, r#"generate_pattern_iterators ! ( double ended ; with # [ stable ( feature = "rust1" , since = "1.0.0" ) ] , Split , RSplit , & 'a str )"#,
1126 "fn foo () {}");
1127}
1128
1129#[test]
1130fn test_impl_fn_for_zst() {
1131 // from https://github.com/rust-lang/rust/blob/5d20ff4d2718c820632b38c1e49d4de648a9810b/src/libcore/internal_macros.rs
1132 let rules = create_rules(
1133 r#"
1134macro_rules! impl_fn_for_zst {
1135 { $( $( #[$attr: meta] )*
1136 struct $Name: ident impl$( <$( $lifetime : lifetime ),+> )? Fn =
1137 |$( $arg: ident: $ArgTy: ty ),*| -> $ReturnTy: ty
1138$body: block; )+
1139 } => {
1140 $(
1141 $( #[$attr] )*
1142 struct $Name;
1143
1144 impl $( <$( $lifetime ),+> )? Fn<($( $ArgTy, )*)> for $Name {
1145 #[inline]
1146 extern "rust-call" fn call(&self, ($( $arg, )*): ($( $ArgTy, )*)) -> $ReturnTy {
1147 $body
1148 }
1149 }
1150
1151 impl $( <$( $lifetime ),+> )? FnMut<($( $ArgTy, )*)> for $Name {
1152 #[inline]
1153 extern "rust-call" fn call_mut(
1154 &mut self,
1155 ($( $arg, )*): ($( $ArgTy, )*)
1156 ) -> $ReturnTy {
1157 Fn::call(&*self, ($( $arg, )*))
1158 }
1159 }
1160
1161 impl $( <$( $lifetime ),+> )? FnOnce<($( $ArgTy, )*)> for $Name {
1162 type Output = $ReturnTy;
1163
1164 #[inline]
1165 extern "rust-call" fn call_once(self, ($( $arg, )*): ($( $ArgTy, )*)) -> $ReturnTy {
1166 Fn::call(&self, ($( $arg, )*))
1167 }
1168 }
1169 )+
1170}
1171 }
1172}
1173"#,
1174 );
1175
1176 assert_expansion(MacroKind::Items, &rules, r#"
1177impl_fn_for_zst ! {
1178 # [ derive ( Clone ) ]
1179 struct CharEscapeDebugContinue impl Fn = | c : char | -> char :: EscapeDebug {
1180 c . escape_debug_ext ( false )
1181 } ;
1182
1183 # [ derive ( Clone ) ]
1184 struct CharEscapeUnicode impl Fn = | c : char | -> char :: EscapeUnicode {
1185 c . escape_unicode ( )
1186 } ;
1187 # [ derive ( Clone ) ]
1188 struct CharEscapeDefault impl Fn = | c : char | -> char :: EscapeDefault {
1189 c . escape_default ( )
1190 } ;
1191 }
1192"#,
1193 "# [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 ,))}}");
1194}
1195
1196#[test]
1197fn test_impl_nonzero_fmt() {
1198 // from https://github.com/rust-lang/rust/blob/316a391dcb7d66dc25f1f9a4ec9d368ef7615005/src/libcore/num/mod.rs#L12
1199 let rules = create_rules(
1200 r#"
1201 macro_rules! impl_nonzero_fmt {
1202 ( #[$stability: meta] ( $( $Trait: ident ),+ ) for $Ty: ident ) => {
1203 fn foo () {}
1204 }
1205 }
1206"#,
1207 );
1208
1209 assert_expansion(MacroKind::Items, &rules, r#"impl_nonzero_fmt! { # [stable(feature= "nonzero",since="1.28.0")] (Debug,Display,Binary,Octal,LowerHex,UpperHex) for NonZeroU8}"#,
1210 "fn foo () {}");
1211}
1212
1213#[test]
1214fn test_cfg_if_items() {
1215 // from https://github.com/rust-lang/rust/blob/33fe1131cadba69d317156847be9a402b89f11bb/src/libstd/macros.rs#L986
1216 let rules = create_rules(
1217 r#"
1218 macro_rules! __cfg_if_items {
1219 (($($not:meta,)*) ; ) => {};
1220 (($($not:meta,)*) ; ( ($($m:meta),*) ($($it:item)*) ), $($rest:tt)*) => {
1221 __cfg_if_items! { ($($not,)* $($m,)*) ; $($rest)* }
1222 }
1223 }
1224"#,
1225 );
1226
1227 assert_expansion(MacroKind::Items, &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 ; ) ) , }"#,
1228 "__cfg_if_items ! {(rustdoc ,) ;}");
1229}
1230
1231#[test]
1232fn test_cfg_if_main() {
1233 // from https://github.com/rust-lang/rust/blob/3d211248393686e0f73851fc7548f6605220fbe1/src/libpanic_unwind/macros.rs#L9
1234 let rules = create_rules(
1235 r#"
1236 macro_rules! cfg_if {
1237 ($(
1238 if #[cfg($($meta:meta),*)] { $($it:item)* }
1239 ) else * else {
1240 $($it2:item)*
1241 }) => {
1242 __cfg_if_items! {
1243 () ;
1244 $( ( ($($meta),*) ($($it)*) ), )*
1245 ( () ($($it2)*) ),
1246 }
1247 }
1248 }
1249"#,
1250 );
1251
1252 assert_expansion(MacroKind::Items, &rules, r#"
1253cfg_if ! {
1254 if # [ cfg ( target_env = "msvc" ) ] {
1255 // no extra unwinder support needed
1256 } else if # [ cfg ( all ( target_arch = "wasm32" , not ( target_os = "emscripten" ) ) ) ] {
1257 // no unwinder on the system!
1258 } else {
1259 mod libunwind ;
1260 pub use libunwind :: * ;
1261 }
1262 }
1263"#,
1264 "__cfg_if_items ! {() ; ((target_env = \"msvc\") ()) , ((all (target_arch = \"wasm32\" , not (target_os = \"emscripten\"))) ()) , (() (mod libunwind ; pub use libunwind :: * ;)) ,}");
1265}
1266
1267#[test]
1268fn test_proptest_arbitrary() {
1269 // from https://github.com/AltSysrq/proptest/blob/d1c4b049337d2f75dd6f49a095115f7c532e5129/proptest/src/arbitrary/macros.rs#L16
1270 let rules = create_rules(
1271 r#"
1272macro_rules! arbitrary {
1273 ([$($bounds : tt)*] $typ: ty, $strat: ty, $params: ty;
1274 $args: ident => $logic: expr) => {
1275 impl<$($bounds)*> $crate::arbitrary::Arbitrary for $typ {
1276 type Parameters = $params;
1277 type Strategy = $strat;
1278 fn arbitrary_with($args: Self::Parameters) -> Self::Strategy {
1279 $logic
1280 }
1281 }
1282 };
1283
1284}"#,
1285 );
1286
1287 assert_expansion(MacroKind::Items, &rules, r#"arbitrary ! ( [ A : Arbitrary ]
1288 Vec < A > ,
1289 VecStrategy < A :: Strategy > ,
1290 RangedParams1 < A :: Parameters > ;
1291 args => { let product_unpack ! [ range , a ] = args ; vec ( any_with :: < A > ( a ) , range ) }
1292 ) ;"#,
1293 "impl <A : Arbitrary > $crate :: arbitrary :: Arbitrary for Vec < A > {type Parameters = RangedParams1 < A :: Parameters > ; type Strategy = VecStrategy < A :: Strategy > ; fn arbitrary_with (args : Self :: Parameters) -> Self :: Strategy {{let product_unpack ! [range , a] = args ; vec (any_with :: < A > (a) , range)}}}");
1294}
1295
1296#[test]
1297fn test_old_ridl() {
1298 // This is from winapi 2.8, which do not have a link from github
1299 //
1300 let rules = create_rules(
1301 r#"
1302#[macro_export]
1303macro_rules! RIDL {
1304 (interface $interface:ident ($vtbl:ident) : $pinterface:ident ($pvtbl:ident)
1305 {$(
1306 fn $method:ident(&mut self $(,$p:ident : $t:ty)*) -> $rtr:ty
1307 ),+}
1308 ) => {
1309 impl $interface {
1310 $(pub unsafe fn $method(&mut self) -> $rtr {
1311 ((*self.lpVtbl).$method)(self $(,$p)*)
1312 })+
1313 }
1314 };
1315}"#,
1316 );
1317
1318 let expanded = expand(&rules, r#"
1319RIDL!{interface ID3D11Asynchronous(ID3D11AsynchronousVtbl): ID3D11DeviceChild(ID3D11DeviceChildVtbl) {
1320 fn GetDataSize(&mut self) -> UINT
1321}}"#);
1322 assert_eq!(expanded.to_string(), "impl ID3D11Asynchronous {pub unsafe fn GetDataSize (& mut self) -> UINT {((* self . lpVtbl) .GetDataSize) (self)}}");
1323}
1324
1325#[test]
1326fn test_quick_error() {
1327 let rules = create_rules(
1328 r#"
1329macro_rules! quick_error {
1330
1331 (SORT [enum $name:ident $( #[$meta:meta] )*]
1332 items [$($( #[$imeta:meta] )*
1333 => $iitem:ident: $imode:tt [$( $ivar:ident: $ityp:ty ),*]
1334 {$( $ifuncs:tt )*} )* ]
1335 buf [ ]
1336 queue [ ]
1337 ) => {
1338 quick_error!(ENUM_DEFINITION [enum $name $( #[$meta] )*]
1339 body []
1340 queue [$(
1341 $( #[$imeta] )*
1342 =>
1343 $iitem: $imode [$( $ivar: $ityp ),*]
1344 )*]
1345 );
1346};
1347
1348}
1349"#,
1350 );
1351
1352 let expanded = expand(
1353 &rules,
1354 r#"
1355quick_error ! (SORT [enum Wrapped # [derive (Debug)]] items [
1356 => One : UNIT [] {}
1357 => Two : TUPLE [s :String] {display ("two: {}" , s) from ()}
1358 ] buf [] queue []) ;
1359"#,
1360 );
1361
1362 assert_eq!(expanded.to_string(), "quick_error ! (ENUM_DEFINITION [enum Wrapped # [derive (Debug)]] body [] queue [=> One : UNIT [] => Two : TUPLE [s : String]]) ;");
1363}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-02 16:45:12 +0000