Files
adblock
addr
addr2line
adler
aho_corasick
backtrace
base64
bitflags
byteorder
cfg_if
crc32fast
ctor
either
error_chain
flate2
foreign_types
foreign_types_shared
ghost
gimli
idna
indoc
indoc_impl
instant
inventory
inventory_impl
itertools
lazy_static
libc
lock_api
log
matches
memchr
miniz_oxide
native_tls
num_traits
object
once_cell
openssl
openssl_probe
openssl_sys
parking_lot
parking_lot_core
paste
paste_impl
percent_encoding
proc_macro2
proc_macro_hack
psl
psl_codegen
psl_lexer
pyo3
pyo3_derive_backend
pyo3cls
quote
regex
regex_syntax
rental
rental_impl
rmp
rmp_serde
rustc_demangle
scopeguard
seahash
sequence_trie
serde
serde_derive
smallvec
stable_deref_trait
syn
thread_local
tinyvec
twoway
unchecked_index
unicode_bidi
unicode_normalization
unicode_xid
unindent
url
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
use super::TokenStreamExt;

use std::borrow::Cow;
use std::iter;
use std::rc::Rc;

use proc_macro2::{Group, Ident, Literal, Punct, Span, TokenStream, TokenTree};

/// Types that can be interpolated inside a [`quote!`] invocation.
///
/// [`quote!`]: macro.quote.html
pub trait ToTokens {
    /// Write `self` to the given `TokenStream`.
    ///
    /// The token append methods provided by the [`TokenStreamExt`] extension
    /// trait may be useful for implementing `ToTokens`.
    ///
    /// [`TokenStreamExt`]: trait.TokenStreamExt.html
    ///
    /// # Example
    ///
    /// Example implementation for a struct representing Rust paths like
    /// `std::cmp::PartialEq`:
    ///
    /// ```edition2018
    /// use proc_macro2::{TokenTree, Spacing, Span, Punct, TokenStream};
    /// use quote::{TokenStreamExt, ToTokens};
    ///
    /// pub struct Path {
    ///     pub global: bool,
    ///     pub segments: Vec<PathSegment>,
    /// }
    ///
    /// impl ToTokens for Path {
    ///     fn to_tokens(&self, tokens: &mut TokenStream) {
    ///         for (i, segment) in self.segments.iter().enumerate() {
    ///             if i > 0 || self.global {
    ///                 // Double colon `::`
    ///                 tokens.append(Punct::new(':', Spacing::Joint));
    ///                 tokens.append(Punct::new(':', Spacing::Alone));
    ///             }
    ///             segment.to_tokens(tokens);
    ///         }
    ///     }
    /// }
    /// #
    /// # pub struct PathSegment;
    /// #
    /// # impl ToTokens for PathSegment {
    /// #     fn to_tokens(&self, tokens: &mut TokenStream) {
    /// #         unimplemented!()
    /// #     }
    /// # }
    /// ```
    fn to_tokens(&self, tokens: &mut TokenStream);

    /// Convert `self` directly into a `TokenStream` object.
    ///
    /// This method is implicitly implemented using `to_tokens`, and acts as a
    /// convenience method for consumers of the `ToTokens` trait.
    fn into_token_stream(self) -> TokenStream
    where
        Self: Sized,
    {
        let mut tokens = TokenStream::new();
        self.to_tokens(&mut tokens);
        tokens
    }
}

impl<'a, T: ?Sized + ToTokens> ToTokens for &'a T {
    fn to_tokens(&self, tokens: &mut TokenStream) {
        (**self).to_tokens(tokens);
    }
}

impl<'a, T: ?Sized + ToTokens> ToTokens for &'a mut T {
    fn to_tokens(&self, tokens: &mut TokenStream) {
        (**self).to_tokens(tokens);
    }
}

impl<'a, T: ?Sized + ToOwned + ToTokens> ToTokens for Cow<'a, T> {
    fn to_tokens(&self, tokens: &mut TokenStream) {
        (**self).to_tokens(tokens);
    }
}

impl<T: ?Sized + ToTokens> ToTokens for Box<T> {
    fn to_tokens(&self, tokens: &mut TokenStream) {
        (**self).to_tokens(tokens);
    }
}

impl<T: ?Sized + ToTokens> ToTokens for Rc<T> {
    fn to_tokens(&self, tokens: &mut TokenStream) {
        (**self).to_tokens(tokens);
    }
}

impl<T: ToTokens> ToTokens for Option<T> {
    fn to_tokens(&self, tokens: &mut TokenStream) {
        if let Some(ref t) = *self {
            t.to_tokens(tokens);
        }
    }
}

impl ToTokens for str {
    fn to_tokens(&self, tokens: &mut TokenStream) {
        tokens.append(Literal::string(self));
    }
}

impl ToTokens for String {
    fn to_tokens(&self, tokens: &mut TokenStream) {
        self.as_str().to_tokens(tokens);
    }
}

macro_rules! primitive {
    ($($t:ident => $name:ident)*) => ($(
        impl ToTokens for $t {
            fn to_tokens(&self, tokens: &mut TokenStream) {
                tokens.append(Literal::$name(*self));
            }
        }
    )*)
}

primitive! {
    i8 => i8_suffixed
    i16 => i16_suffixed
    i32 => i32_suffixed
    i64 => i64_suffixed
    isize => isize_suffixed

    u8 => u8_suffixed
    u16 => u16_suffixed
    u32 => u32_suffixed
    u64 => u64_suffixed
    usize => usize_suffixed

    f32 => f32_suffixed
    f64 => f64_suffixed
}

#[cfg(integer128)]
primitive! {
    i128 => i128_suffixed
    u128 => u128_suffixed
}

impl ToTokens for char {
    fn to_tokens(&self, tokens: &mut TokenStream) {
        tokens.append(Literal::character(*self));
    }
}

impl ToTokens for bool {
    fn to_tokens(&self, tokens: &mut TokenStream) {
        let word = if *self { "true" } else { "false" };
        tokens.append(Ident::new(word, Span::call_site()));
    }
}

impl ToTokens for Group {
    fn to_tokens(&self, tokens: &mut TokenStream) {
        tokens.append(self.clone());
    }
}

impl ToTokens for Ident {
    fn to_tokens(&self, tokens: &mut TokenStream) {
        tokens.append(self.clone());
    }
}

impl ToTokens for Punct {
    fn to_tokens(&self, tokens: &mut TokenStream) {
        tokens.append(self.clone());
    }
}

impl ToTokens for Literal {
    fn to_tokens(&self, tokens: &mut TokenStream) {
        tokens.append(self.clone());
    }
}

impl ToTokens for TokenTree {
    fn to_tokens(&self, dst: &mut TokenStream) {
        dst.append(self.clone());
    }
}

impl ToTokens for TokenStream {
    fn to_tokens(&self, dst: &mut TokenStream) {
        dst.extend(iter::once(self.clone()));
    }

    fn into_token_stream(self) -> TokenStream {
        self
    }
}