Alex Crichton | 44bffbc | 2017-05-19 17:51:59 -0700 | [diff] [blame] | 1 | extern crate proc_macro; |
| 2 | |
Alex Crichton | e14e8fd | 2017-05-23 07:02:54 -0700 | [diff] [blame] | 3 | #[cfg(not(feature = "unstable"))] |
David Tolnay | b103266 | 2017-05-31 15:52:28 -0700 | [diff] [blame^] | 4 | extern crate unicode_xid; |
Alex Crichton | 44bffbc | 2017-05-19 17:51:59 -0700 | [diff] [blame] | 5 | |
| 6 | use std::fmt; |
Alex Crichton | 44bffbc | 2017-05-19 17:51:59 -0700 | [diff] [blame] | 7 | use std::str::FromStr; |
| 8 | use std::iter::FromIterator; |
| 9 | |
David Tolnay | b103266 | 2017-05-31 15:52:28 -0700 | [diff] [blame^] | 10 | #[macro_use] |
| 11 | #[cfg(not(feature = "unstable"))] |
| 12 | mod strnom; |
| 13 | |
Alex Crichton | 44bffbc | 2017-05-19 17:51:59 -0700 | [diff] [blame] | 14 | #[path = "stable.rs"] |
Alex Crichton | e14e8fd | 2017-05-23 07:02:54 -0700 | [diff] [blame] | 15 | #[cfg(not(feature = "unstable"))] |
Alex Crichton | b15c635 | 2017-05-19 19:36:36 -0700 | [diff] [blame] | 16 | mod imp; |
| 17 | #[path = "unstable.rs"] |
Alex Crichton | e14e8fd | 2017-05-23 07:02:54 -0700 | [diff] [blame] | 18 | #[cfg(feature = "unstable")] |
Alex Crichton | 44bffbc | 2017-05-19 17:51:59 -0700 | [diff] [blame] | 19 | mod imp; |
| 20 | |
| 21 | #[derive(Clone)] |
| 22 | pub struct TokenStream(imp::TokenStream); |
| 23 | |
| 24 | #[derive(Debug)] |
| 25 | pub struct LexError(imp::LexError); |
| 26 | |
| 27 | impl FromStr for TokenStream { |
| 28 | type Err = LexError; |
| 29 | |
| 30 | fn from_str(src: &str) -> Result<TokenStream, LexError> { |
| 31 | match src.parse() { |
| 32 | Ok(e) => Ok(TokenStream(e)), |
| 33 | Err(e) => Err(LexError(e)), |
| 34 | } |
| 35 | } |
| 36 | } |
| 37 | |
| 38 | impl fmt::Display for TokenStream { |
| 39 | fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { |
| 40 | self.0.fmt(f) |
| 41 | } |
| 42 | } |
| 43 | |
| 44 | impl From<proc_macro::TokenStream> for TokenStream { |
| 45 | fn from(inner: proc_macro::TokenStream) -> TokenStream { |
| 46 | TokenStream(inner.into()) |
| 47 | } |
| 48 | } |
| 49 | |
| 50 | impl From<TokenStream> for proc_macro::TokenStream { |
| 51 | fn from(inner: TokenStream) -> proc_macro::TokenStream { |
| 52 | inner.0.into() |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | impl From<TokenTree> for TokenStream { |
| 57 | fn from(tree: TokenTree) -> TokenStream { |
| 58 | TokenStream(tree.into()) |
| 59 | } |
| 60 | } |
| 61 | |
Alex Crichton | 44bffbc | 2017-05-19 17:51:59 -0700 | [diff] [blame] | 62 | impl<T: Into<TokenStream>> FromIterator<T> for TokenStream { |
| 63 | fn from_iter<I: IntoIterator<Item = T>>(streams: I) -> Self { |
| 64 | TokenStream(streams.into_iter().map(|t| t.into().0).collect()) |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | impl IntoIterator for TokenStream { |
| 69 | type Item = TokenTree; |
| 70 | type IntoIter = TokenIter; |
| 71 | |
| 72 | fn into_iter(self) -> TokenIter { |
| 73 | TokenIter(self.0.into_iter()) |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | impl TokenStream { |
| 78 | pub fn empty() -> TokenStream { |
| 79 | TokenStream(imp::TokenStream::empty()) |
| 80 | } |
| 81 | |
| 82 | pub fn is_empty(&self) -> bool { |
| 83 | self.0.is_empty() |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | #[derive(Copy, Clone)] |
| 88 | pub struct Span(imp::Span); |
| 89 | |
| 90 | impl Default for Span { |
| 91 | fn default() -> Span { |
| 92 | Span(imp::Span::default()) |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | impl Span { |
| 97 | pub fn call_site() -> Span { |
| 98 | Span(imp::Span::call_site()) |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | #[derive(Clone)] |
| 103 | pub struct TokenTree { |
| 104 | pub span: Span, |
| 105 | pub kind: TokenKind, |
| 106 | } |
| 107 | |
Alex Crichton | 44bffbc | 2017-05-19 17:51:59 -0700 | [diff] [blame] | 108 | impl fmt::Display for TokenTree { |
| 109 | fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { |
| 110 | TokenStream::from(self.clone()).fmt(f) |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | #[derive(Clone)] |
| 115 | pub enum TokenKind { |
| 116 | Sequence(Delimiter, TokenStream), |
| 117 | Word(Symbol), |
| 118 | Op(char, OpKind), |
| 119 | Literal(Literal), |
| 120 | } |
| 121 | |
| 122 | #[derive(Copy, Clone)] |
| 123 | pub enum Delimiter { |
| 124 | Parenthesis, |
| 125 | Brace, |
| 126 | Bracket, |
| 127 | None, |
| 128 | } |
| 129 | |
| 130 | #[derive(Copy, Clone)] |
| 131 | pub struct Symbol(imp::Symbol); |
| 132 | |
| 133 | impl<'a> From<&'a str> for Symbol { |
| 134 | fn from(string: &'a str) -> Symbol { |
| 135 | Symbol(string.into()) |
| 136 | } |
| 137 | } |
| 138 | |
Alex Crichton | 852d53d | 2017-05-19 19:25:08 -0700 | [diff] [blame] | 139 | impl From<String> for Symbol { |
| 140 | fn from(string: String) -> Symbol { |
| 141 | Symbol(string[..].into()) |
| 142 | } |
| 143 | } |
| 144 | |
Alex Crichton | 9c2fb0a | 2017-05-26 08:49:31 -0700 | [diff] [blame] | 145 | impl Symbol { |
Alex Crichton | 4388125 | 2017-05-26 08:51:06 -0700 | [diff] [blame] | 146 | pub fn as_str(&self) -> &str { |
Alex Crichton | 44bffbc | 2017-05-19 17:51:59 -0700 | [diff] [blame] | 147 | &self.0 |
| 148 | } |
| 149 | } |
| 150 | |
| 151 | #[derive(Copy, Clone)] |
| 152 | pub enum OpKind { |
| 153 | Alone, |
| 154 | Joint, |
| 155 | } |
| 156 | |
| 157 | #[derive(Clone)] |
| 158 | pub struct Literal(imp::Literal); |
| 159 | |
| 160 | impl fmt::Display for Literal { |
| 161 | fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { |
| 162 | self.0.fmt(f) |
| 163 | } |
| 164 | } |
| 165 | |
Alex Crichton | 852d53d | 2017-05-19 19:25:08 -0700 | [diff] [blame] | 166 | impl Literal { |
Alex Crichton | 9c2fb0a | 2017-05-26 08:49:31 -0700 | [diff] [blame] | 167 | pub fn byte_char(b: u8) -> Literal { |
| 168 | Literal(imp::Literal::byte_char(b)) |
Alex Crichton | 76a5cc8 | 2017-05-23 07:01:44 -0700 | [diff] [blame] | 169 | } |
| 170 | |
Alex Crichton | 9c2fb0a | 2017-05-26 08:49:31 -0700 | [diff] [blame] | 171 | pub fn byte_string(s: &[u8]) -> Literal { |
| 172 | Literal(imp::Literal::byte_string(s)) |
Alex Crichton | 852d53d | 2017-05-19 19:25:08 -0700 | [diff] [blame] | 173 | } |
Alex Crichton | 76a5cc8 | 2017-05-23 07:01:44 -0700 | [diff] [blame] | 174 | |
| 175 | pub fn doccomment(s: &str) -> Literal { |
| 176 | Literal(imp::Literal::doccomment(s)) |
| 177 | } |
Alex Crichton | 9c2fb0a | 2017-05-26 08:49:31 -0700 | [diff] [blame] | 178 | |
| 179 | pub fn float(s: &str) -> Literal { |
| 180 | Literal(imp::Literal::float(s)) |
| 181 | } |
| 182 | |
| 183 | pub fn integer(s: &str) -> Literal { |
| 184 | Literal(imp::Literal::integer(s)) |
| 185 | } |
Alex Crichton | 3131662 | 2017-05-26 12:54:47 -0700 | [diff] [blame] | 186 | |
| 187 | pub fn raw_string(s: &str, pounds: usize) -> Literal { |
| 188 | Literal(imp::Literal::raw_string(s, pounds)) |
| 189 | } |
| 190 | |
| 191 | pub fn raw_byte_string(s: &str, pounds: usize) -> Literal { |
| 192 | Literal(imp::Literal::raw_byte_string(s, pounds)) |
| 193 | } |
Alex Crichton | 852d53d | 2017-05-19 19:25:08 -0700 | [diff] [blame] | 194 | } |
| 195 | |
Alex Crichton | 9c2fb0a | 2017-05-26 08:49:31 -0700 | [diff] [blame] | 196 | macro_rules! froms { |
Alex Crichton | 44bffbc | 2017-05-19 17:51:59 -0700 | [diff] [blame] | 197 | ($($t:ty,)*) => {$( |
| 198 | impl<'a> From<$t> for Literal { |
| 199 | fn from(t: $t) -> Literal { |
| 200 | Literal(t.into()) |
| 201 | } |
| 202 | } |
| 203 | )*} |
| 204 | } |
| 205 | |
Alex Crichton | 9c2fb0a | 2017-05-26 08:49:31 -0700 | [diff] [blame] | 206 | froms! { |
Alex Crichton | 852d53d | 2017-05-19 19:25:08 -0700 | [diff] [blame] | 207 | u8, u16, u32, u64, usize, |
| 208 | i8, i16, i32, i64, isize, |
Alex Crichton | 46060dc | 2017-05-25 07:41:30 -0700 | [diff] [blame] | 209 | f32, f64, char, &'a str, |
Alex Crichton | 44bffbc | 2017-05-19 17:51:59 -0700 | [diff] [blame] | 210 | } |
| 211 | |
| 212 | pub struct TokenIter(imp::TokenIter); |
| 213 | |
| 214 | impl Iterator for TokenIter { |
| 215 | type Item = TokenTree; |
| 216 | |
| 217 | fn next(&mut self) -> Option<TokenTree> { |
| 218 | self.0.next() |
| 219 | } |
| 220 | } |