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-rw-r--r--crates/parser/src/grammar/type_args.rs32
-rw-r--r--crates/parser/src/grammar/type_params.rs10
-rw-r--r--crates/syntax/test_data/parser/inline/ok/0165_const_param_defaults.rast96
-rw-r--r--crates/syntax/test_data/parser/inline/ok/0165_const_param_defaults.rs3
4 files changed, 141 insertions, 0 deletions
diff --git a/crates/parser/src/grammar/type_args.rs b/crates/parser/src/grammar/type_args.rs
index 56266b8d4..be36cad17 100644
--- a/crates/parser/src/grammar/type_args.rs
+++ b/crates/parser/src/grammar/type_args.rs
@@ -25,6 +25,38 @@ pub(super) fn opt_generic_arg_list(p: &mut Parser, colon_colon_required: bool) {
25 m.complete(p, GENERIC_ARG_LIST); 25 m.complete(p, GENERIC_ARG_LIST);
26} 26}
27 27
28pub(super) fn const_arg(p: &mut Parser) {
29 let m = p.start();
30 // FIXME: duplicates the code below
31 match p.current() {
32 T!['{'] => {
33 expressions::block_expr(p);
34 m.complete(p, CONST_ARG);
35 }
36 k if k.is_literal() => {
37 expressions::literal(p);
38 m.complete(p, CONST_ARG);
39 }
40 T![true] | T![false] => {
41 expressions::literal(p);
42 m.complete(p, CONST_ARG);
43 }
44 T![-] => {
45 let lm = p.start();
46 p.bump(T![-]);
47 expressions::literal(p);
48 lm.complete(p, PREFIX_EXPR);
49 m.complete(p, CONST_ARG);
50 }
51 _ => {
52 let lm = p.start();
53 paths::use_path(p);
54 lm.complete(p, PATH_EXPR);
55 m.complete(p, CONST_ARG);
56 }
57 }
58}
59
28// test type_arg 60// test type_arg
29// type A = B<'static, i32, 1, { 2 }, Item=u64, true, false>; 61// type A = B<'static, i32, 1, { 2 }, Item=u64, true, false>;
30fn generic_arg(p: &mut Parser) { 62fn generic_arg(p: &mut Parser) {
diff --git a/crates/parser/src/grammar/type_params.rs b/crates/parser/src/grammar/type_params.rs
index 3de5248da..b1f979281 100644
--- a/crates/parser/src/grammar/type_params.rs
+++ b/crates/parser/src/grammar/type_params.rs
@@ -70,6 +70,16 @@ fn const_param(p: &mut Parser, m: Marker) {
70 p.bump(T![const]); 70 p.bump(T![const]);
71 name(p); 71 name(p);
72 types::ascription(p); 72 types::ascription(p);
73
74 // test const_param_defaults
75 // struct A<const N: i32 = -1>;
76 // struct B<const N: i32 = {}>;
77 // struct C<const N: i32 = some::CONST>;
78 if p.at(T![=]) {
79 p.bump(T![=]);
80 type_args::const_arg(p);
81 }
82
73 m.complete(p, CONST_PARAM); 83 m.complete(p, CONST_PARAM);
74} 84}
75 85
diff --git a/crates/syntax/test_data/parser/inline/ok/0165_const_param_defaults.rast b/crates/syntax/test_data/parser/inline/ok/0165_const_param_defaults.rast
new file mode 100644
index 000000000..e8f40a4cd
--- /dev/null
+++ b/crates/syntax/test_data/parser/inline/ok/0165_const_param_defaults.rast
@@ -0,0 +1,96 @@
1[email protected]
2 [email protected]
3 [email protected] "struct"
4 [email protected] " "
5 [email protected]
6 [email protected] "A"
7 [email protected]
8 [email protected] "<"
9 [email protected]
10 [email protected] "const"
11 [email protected] " "
12 [email protected]
13 [email protected] "N"
14 [email protected] ":"
15 [email protected] " "
16 [email protected]
17 [email protected]
18 [email protected]
19 [email protected]
20 [email protected] "i32"
21 [email protected] " "
22 [email protected] "="
23 [email protected] " "
24 [email protected]
25 [email protected]
26 [email protected] "-"
27 [email protected]
28 [email protected] "1"
29 [email protected] ">"
30 [email protected] ";"
31 [email protected] "\n"
32 [email protected]
33 [email protected] "struct"
34 [email protected] " "
35 [email protected]
36 [email protected] "B"
37 [email protected]
38 [email protected] "<"
39 [email protected]
40 [email protected] "const"
41 [email protected] " "
42 [email protected]
43 [email protected] "N"
44 [email protected] ":"
45 [email protected] " "
46 [email protected]
47 [email protected]
48 [email protected]
49 [email protected]
50 [email protected] "i32"
51 [email protected] " "
52 [email protected] "="
53 [email protected] " "
54 [email protected]
55 [email protected]
56 [email protected] "{"
57 [email protected] "}"
58 [email protected] ">"
59 [email protected] ";"
60 [email protected] "\n"
61 [email protected]
62 [email protected] "struct"
63 [email protected] " "
64 [email protected]
65 [email protected] "C"
66 [email protected]
67 [email protected] "<"
68 [email protected]
69 [email protected] "const"
70 [email protected] " "
71 [email protected]
72 [email protected] "N"
73 [email protected] ":"
74 [email protected] " "
75 [email protected]
76 [email protected]
77 [email protected]
78 [email protected]
79 [email protected] "i32"
80 [email protected] " "
81 [email protected] "="
82 [email protected] " "
83 [email protected]
84 [email protected]
85 [email protected]
86 [email protected]
87 [email protected]
88 [email protected]
89 [email protected] "some"
90 [email protected] "::"
91 [email protected]
92 [email protected]
93 [email protected] "CONST"
94 [email protected] ">"
95 [email protected] ";"
96 [email protected] "\n"
diff --git a/crates/syntax/test_data/parser/inline/ok/0165_const_param_defaults.rs b/crates/syntax/test_data/parser/inline/ok/0165_const_param_defaults.rs
new file mode 100644
index 000000000..68388c8fb
--- /dev/null
+++ b/crates/syntax/test_data/parser/inline/ok/0165_const_param_defaults.rs
@@ -0,0 +1,3 @@
1struct A<const N: i32 = -1>;
2struct B<const N: i32 = {}>;
3struct C<const N: i32 = some::CONST>;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 19:11:47 +0000