Migrate basic tests for proc_macro::quote! from quote crate

tests/ui/proc-macro/quote/auxiliary/basic.rs

@@ -0,0 +1,360 @@
+#![feature(proc_macro_quote)]
+#![feature(proc_macro_totokens)]
+
+extern crate proc_macro;
+
+use std::borrow::Cow;
+use std::ffi::{CStr, CString};
+
+use proc_macro::*;
+
+#[proc_macro]
+pub fn run_tests(_: TokenStream) -> TokenStream {
+    test_quote_impl();
+    test_substitution();
+    test_advanced();
+    test_integer();
+    test_floating();
+    test_char();
+    test_str();
+    test_string();
+    test_c_str();
+    test_c_string();
+    test_interpolated_literal();
+    test_ident();
+    test_underscore();
+    test_duplicate();
+    test_empty_quote();
+    test_box_str();
+    test_cow();
+    test_append_tokens();
+    test_outer_line_comment();
+    test_inner_line_comment();
+    test_outer_block_comment();
+    test_inner_block_comment();
+    test_outer_attr();
+    test_inner_attr();
+    // test_quote_raw_id(); // FIXME: Fix it in a subsequent commit
+
+    TokenStream::new()
+}
+
+// Based on https://github.com/dtolnay/quote/blob/0245506323a3616daa2ee41c6ad0b871e4d78ae4/tests/test.rs
+//
+// FIXME(quote):
+// The following tests are removed because they are not supported yet in `proc_macro::quote!`
+//
+// - quote_spanned:
+//   - fn test_quote_spanned_impl
+//   - fn test_type_inference_for_span
+// - format_ident:
+//   - fn test_format_ident
+//   - fn test_format_ident_strip_raw
+// - repetition:
+//   - fn test_iter
+//   - fn test_array
+//   - fn test_fancy_repetition
+//   - fn test_nested_fancy_repetition
+//   - fn test_duplicate_name_repetition
+//   - fn test_duplicate_name_repetition_no_copy
+//   - fn test_btreeset_repetition
+//   - fn test_variable_name_conflict
+//   - fn test_nonrep_in_repetition
+//   - fn test_closure
+//   - fn test_star_after_repetition
+
+struct X;
+
+impl ToTokens for X {
+    fn to_tokens(&self, tokens: &mut TokenStream) {
+        Ident::new("X", Span::call_site()).to_tokens(tokens)
+    }
+}
+
+fn test_quote_impl() {
+    let tokens = quote! {
+        impl<'a, T: ToTokens> ToTokens for &'a T {
+            fn to_tokens(&self, tokens: &mut TokenStream) {
+                (**self).to_tokens(tokens)
+            }
+        }
+    };
+
+    let expected = r#"impl < 'a, T : ToTokens > ToTokens for & 'a T
+{
+    fn to_tokens(& self, tokens : & mut TokenStream)
+    { (** self).to_tokens(tokens) }
+}"#;
+
+    assert_eq!(expected, tokens.to_string());
+}
+
+fn test_substitution() {
+    let x = X;
+    let tokens = quote!($x <$x> ($x) [$x] {$x});
+
+    let expected = "X <X > (X) [X] { X }";
+
+    assert_eq!(expected, tokens.to_string());
+}
+
+fn test_advanced() {
+    let generics = quote!( <'a, T> );
+
+    let where_clause = quote!( where T: Serialize );
+
+    let field_ty = quote!(String);
+
+    let item_ty = quote!(Cow<'a, str>);
+
+    let path = quote!(SomeTrait::serialize_with);
+
+    let value = quote!(self.x);
+
+    let tokens = quote! {
+        struct SerializeWith $generics $where_clause {
+            value: &'a $field_ty,
+            phantom: ::std::marker::PhantomData<$item_ty>,
+        }
+
+        impl $generics ::serde::Serialize for SerializeWith $generics $where_clause {
+            fn serialize<S>(&self, s: &mut S) -> Result<(), S::Error>
+                where S: ::serde::Serializer
+            {
+                $path(self.value, s)
+            }
+        }
+
+        SerializeWith {
+            value: $value,
+            phantom: ::std::marker::PhantomData::<$item_ty>,
+        }
+    };
+
+    let expected = r#"struct SerializeWith < 'a, T > where T : Serialize
+{
+    value : & 'a String, phantom : :: std :: marker :: PhantomData <Cow < 'a,
+    str > >,
+} impl < 'a, T > :: serde :: Serialize for SerializeWith < 'a, T > where T :
+Serialize
+{
+    fn serialize < S > (& self, s : & mut S) -> Result < (), S :: Error >
+    where S : :: serde :: Serializer
+    { SomeTrait :: serialize_with(self.value, s) }
+} SerializeWith
+{
+    value : self.x, phantom : :: std :: marker :: PhantomData ::<Cow < 'a, str
+    > >,
+}"#;
+
+    assert_eq!(expected, tokens.to_string());
+}
+
+fn test_integer() {
+    let ii8 = -1i8;
+    let ii16 = -1i16;
+    let ii32 = -1i32;
+    let ii64 = -1i64;
+    let ii128 = -1i128;
+    let iisize = -1isize;
+    let uu8 = 1u8;
+    let uu16 = 1u16;
+    let uu32 = 1u32;
+    let uu64 = 1u64;
+    let uu128 = 1u128;
+    let uusize = 1usize;
+
+    let tokens = quote! {
+        1 1i32 1u256
+        $ii8 $ii16 $ii32 $ii64 $ii128 $iisize
+        $uu8 $uu16 $uu32 $uu64 $uu128 $uusize
+    };
+    let expected = r#"1 1i32 1u256 -1i8 -1i16 -1i32 -1i64 -1i128 -1isize 1u8 1u16 1u32 1u64 1u128
+1usize"#;
+    assert_eq!(expected, tokens.to_string());
+}
+
+fn test_floating() {
+    let e32 = 2.345f32;
+
+    let e64 = 2.345f64;
+
+    let tokens = quote! {
+        $e32
+        $e64
+    };
+    let expected = concat!("2.345f32 2.345f64");
+    assert_eq!(expected, tokens.to_string());
+}
+
+fn test_char() {
+    let zero = '\u{1}';
+    let dollar = '$';
+    let pound = '#';
+    let quote = '"';
+    let apost = '\'';
+    let newline = '\n';
+    let heart = '\u{2764}';
+
+    let tokens = quote! {
+        $zero $dollar $pound $quote $apost $newline $heart
+    };
+    let expected = "'\\u{1}' '$' '#' '\"' '\\'' '\\n' '\u{2764}'";
+    assert_eq!(expected, tokens.to_string());
+}
+
+fn test_str() {
+    let s = "\u{1} a 'b \" c";
+    let tokens = quote!($s);
+    let expected = "\"\\u{1} a 'b \\\" c\"";
+    assert_eq!(expected, tokens.to_string());
+}
+
+fn test_string() {
+    let s = "\u{1} a 'b \" c".to_string();
+    let tokens = quote!($s);
+    let expected = "\"\\u{1} a 'b \\\" c\"";
+    assert_eq!(expected, tokens.to_string());
+}
+
+fn test_c_str() {
+    let s = CStr::from_bytes_with_nul(b"\x01 a 'b \" c\0").unwrap();
+    let tokens = quote!($s);
+    let expected = "c\"\\u{1} a 'b \\\" c\"";
+    assert_eq!(expected, tokens.to_string());
+}
+
+fn test_c_string() {
+    let s = CString::new(&b"\x01 a 'b \" c"[..]).unwrap();
+    let tokens = quote!($s);
+    let expected = "c\"\\u{1} a 'b \\\" c\"";
+    assert_eq!(expected, tokens.to_string());
+}
+
+fn test_interpolated_literal() {
+    macro_rules! m {
+        ($literal:literal) => {
+            quote!($literal)
+        };
+    }
+
+    let tokens = m!(1);
+    let expected = "1";
+    assert_eq!(expected, tokens.to_string());
+
+    let tokens = m!(-1);
+    let expected = "- 1";
+    assert_eq!(expected, tokens.to_string());
+
+    let tokens = m!(true);
+    let expected = "true";
+    assert_eq!(expected, tokens.to_string());
+
+    let tokens = m!(-true);
+    let expected = "- true";
+    assert_eq!(expected, tokens.to_string());
+}
+
+fn test_ident() {
+    let foo = Ident::new("Foo", Span::call_site());
+    let bar = Ident::new(&format!("Bar{}", 7), Span::call_site());
+    let tokens = quote!(struct $foo; enum $bar {});
+    let expected = "struct Foo; enum Bar7 {}";
+    assert_eq!(expected, tokens.to_string());
+}
+
+fn test_underscore() {
+    let tokens = quote!(let _;);
+    let expected = "let _;";
+    assert_eq!(expected, tokens.to_string());
+}
+
+fn test_duplicate() {
+    let ch = 'x';
+
+    let tokens = quote!($ch $ch);
+
+    let expected = "'x' 'x'";
+    assert_eq!(expected, tokens.to_string());
+}
+
+fn test_empty_quote() {
+    let tokens = quote!();
+    assert_eq!("", tokens.to_string());
+}
+
+fn test_box_str() {
+    let b = "str".to_owned().into_boxed_str();
+    let tokens = quote! { $b };
+    assert_eq!("\"str\"", tokens.to_string());
+}
+
+fn test_cow() {
+    let owned: Cow<Ident> = Cow::Owned(Ident::new("owned", Span::call_site()));
+
+    let ident = Ident::new("borrowed", Span::call_site());
+    let borrowed = Cow::Borrowed(&ident);
+
+    let tokens = quote! { $owned $borrowed };
+    assert_eq!("owned borrowed", tokens.to_string());
+}
+
+fn test_append_tokens() {
+    let mut a = quote!(a);
+    let b = quote!(b);
+    a.extend(b);
+    assert_eq!("a b", a.to_string());
+}
+
+fn test_outer_line_comment() {
+    let tokens = quote! {
+        /// doc
+    };
+    let expected = "#[doc = \" doc\"]";
+    assert_eq!(expected, tokens.to_string());
+}
+
+fn test_inner_line_comment() {
+    let tokens = quote! {
+        //! doc
+    };
+    let expected = "# ! [doc = \" doc\"]";
+    assert_eq!(expected, tokens.to_string());
+}
+
+fn test_outer_block_comment() {
+    let tokens = quote! {
+        /** doc */
+    };
+    let expected = "#[doc = \" doc \"]";
+    assert_eq!(expected, tokens.to_string());
+}
+
+fn test_inner_block_comment() {
+    let tokens = quote! {
+        /*! doc */
+    };
+    let expected = "# ! [doc = \" doc \"]";
+    assert_eq!(expected, tokens.to_string());
+}
+
+fn test_outer_attr() {
+    let tokens = quote! {
+        #[inline]
+    };
+    let expected = "#[inline]";
+    assert_eq!(expected, tokens.to_string());
+}
+
+fn test_inner_attr() {
+    let tokens = quote! {
+        #![no_std]
+    };
+    let expected = "#! [no_std]";
+    assert_eq!(expected, tokens.to_string());
+}
+
+fn test_quote_raw_id() {
+    let id = quote!(r#raw_id);
+    assert_eq!(id.to_string(), "r#raw_id");
+}

tests/ui/proc-macro/quote/basic.rs

@@ -0,0 +1,8 @@
+//@ run-pass
+//@ proc-macro: basic.rs
+
+extern crate basic;
+
+fn main() {
+    basic::run_tests!();
+}