1 files changed, 55 insertions, 0 deletions
diff --git a/tests/ui/proc-macro/auxiliary/api/parse.rs b/tests/ui/proc-macro/auxiliary/api/parse.rs
new file mode 100644
index 00000000000..27391f83111
--- /dev/null
+++ b/tests/ui/proc-macro/auxiliary/api/parse.rs
@@ -0,0 +1,55 @@
+// ignore-tidy-linelength
+
+use proc_macro::Literal;
+
+pub fn test() {
+    test_display_literal();
+    test_parse_literal();
+}
+
+fn test_display_literal() {
+    assert_eq!(Literal::isize_unsuffixed(-10).to_string(), "-10");
+    assert_eq!(Literal::isize_suffixed(-10).to_string(), "-10isize");
+    assert_eq!(Literal::f32_unsuffixed(-10.0).to_string(), "-10.0");
+    assert_eq!(Literal::f32_suffixed(-10.0).to_string(), "-10f32");
+    assert_eq!(Literal::f64_unsuffixed(-10.0).to_string(), "-10.0");
+    assert_eq!(Literal::f64_suffixed(-10.0).to_string(), "-10f64");
+    assert_eq!(
+        Literal::f64_unsuffixed(1e100).to_string(),
+        "10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.0",
+    );
+
+    assert_eq!(
+        Literal::string("a \t ❤ ' \" \u{1}").to_string(),
+        "\"a \\t ❤ ' \\\" \\u{1}\"",
+    );
+    assert_eq!(Literal::character('a').to_string(), "'a'");
+    assert_eq!(Literal::character('\t').to_string(), "'\\t'");
+    assert_eq!(Literal::character('❤').to_string(), "'❤'");
+    assert_eq!(Literal::character('\'').to_string(), "'\\''");
+    assert_eq!(Literal::character('"').to_string(), "'\"'");
+    assert_eq!(Literal::character('\u{1}').to_string(), "'\\u{1}'");
+}
+
+fn test_parse_literal() {
+    assert_eq!("1".parse::<Literal>().unwrap().to_string(), "1");
+    assert_eq!("1.0".parse::<Literal>().unwrap().to_string(), "1.0");
+    assert_eq!("'a'".parse::<Literal>().unwrap().to_string(), "'a'");
+    assert_eq!("\"\n\"".parse::<Literal>().unwrap().to_string(), "\"\n\"");
+    assert_eq!("b\"\"".parse::<Literal>().unwrap().to_string(), "b\"\"");
+    assert_eq!("r##\"\"##".parse::<Literal>().unwrap().to_string(), "r##\"\"##");
+    assert_eq!("10ulong".parse::<Literal>().unwrap().to_string(), "10ulong");
+    assert_eq!("-10ulong".parse::<Literal>().unwrap().to_string(), "-10ulong");
+
+    assert!("true".parse::<Literal>().is_err());
+    assert!(".8".parse::<Literal>().is_err());
+    assert!("0 1".parse::<Literal>().is_err());
+    assert!("'a".parse::<Literal>().is_err());
+    assert!(" 0".parse::<Literal>().is_err());
+    assert!("0 ".parse::<Literal>().is_err());
+    assert!("/* comment */0".parse::<Literal>().is_err());
+    assert!("0/* comment */".parse::<Literal>().is_err());
+    assert!("0// comment".parse::<Literal>().is_err());
+    assert!("- 10".parse::<Literal>().is_err());
+    assert!("-'x'".parse::<Literal>().is_err());
+}