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-rw-r--r--syn/src/ident.rs101
1 files changed, 0 insertions, 101 deletions
diff --git a/syn/src/ident.rs b/syn/src/ident.rs
deleted file mode 100644
index 4ca7484..0000000
--- a/syn/src/ident.rs
+++ /dev/null
@@ -1,101 +0,0 @@
-#[cfg(feature = "parsing")]
-use crate::buffer::Cursor;
-#[cfg(feature = "parsing")]
-use crate::lookahead;
-#[cfg(feature = "parsing")]
-use crate::parse::{Parse, ParseStream, Result};
-#[cfg(feature = "parsing")]
-use crate::token::Token;
-use unicode_xid::UnicodeXID;
-
-pub use proc_macro2::Ident;
-
-#[cfg(feature = "parsing")]
-#[doc(hidden)]
-#[allow(non_snake_case)]
-pub fn Ident(marker: lookahead::TokenMarker) -> Ident {
- match marker {}
-}
-
-#[cfg(feature = "parsing")]
-fn accept_as_ident(ident: &Ident) -> bool {
- match ident.to_string().as_str() {
- "_" |
- // Based on https://doc.rust-lang.org/grammar.html#keywords
- // and https://github.com/rust-lang/rfcs/blob/master/text/2421-unreservations-2018.md
- // and https://github.com/rust-lang/rfcs/blob/master/text/2420-unreserve-proc.md
- "abstract" | "as" | "become" | "box" | "break" | "const" | "continue" |
- "crate" | "do" | "else" | "enum" | "extern" | "false" | "final" | "fn" |
- "for" | "if" | "impl" | "in" | "let" | "loop" | "macro" | "match" |
- "mod" | "move" | "mut" | "override" | "priv" | "pub" | "ref" |
- "return" | "Self" | "self" | "static" | "struct" | "super" | "trait" |
- "true" | "type" | "typeof" | "unsafe" | "unsized" | "use" | "virtual" |
- "where" | "while" | "yield" => false,
- _ => true,
- }
-}
-
-#[cfg(feature = "parsing")]
-impl Parse for Ident {
- fn parse(input: ParseStream) -> Result<Self> {
- input.step(|cursor| {
- if let Some((ident, rest)) = cursor.ident() {
- if accept_as_ident(&ident) {
- return Ok((ident, rest));
- }
- }
- Err(cursor.error("expected identifier"))
- })
- }
-}
-
-#[cfg(feature = "parsing")]
-impl Token for Ident {
- fn peek(cursor: Cursor) -> bool {
- if let Some((ident, _rest)) = cursor.ident() {
- accept_as_ident(&ident)
- } else {
- false
- }
- }
-
- fn display() -> &'static str {
- "identifier"
- }
-}
-
-macro_rules! ident_from_token {
- ($token:ident) => {
- impl From<Token![$token]> for Ident {
- fn from(token: Token![$token]) -> Ident {
- Ident::new(stringify!($token), token.span)
- }
- }
- };
-}
-
-ident_from_token!(self);
-ident_from_token!(Self);
-ident_from_token!(super);
-ident_from_token!(crate);
-ident_from_token!(extern);
-
-impl From<Token![_]> for Ident {
- fn from(token: Token![_]) -> Ident {
- Ident::new("_", token.span)
- }
-}
-
-pub fn xid_ok(symbol: &str) -> bool {
- let mut chars = symbol.chars();
- let first = chars.next().unwrap();
- if !(UnicodeXID::is_xid_start(first) || first == '_') {
- return false;
- }
- for ch in chars {
- if !UnicodeXID::is_xid_continue(ch) {
- return false;
- }
- }
- true
-}