1 files changed, 0 insertions, 54 deletions
diff --git a/src/libsyntax_ext/cfg.rs b/src/libsyntax_ext/cfg.rs
deleted file mode 100644
index 7b1dbcc7762..00000000000
--- a/src/libsyntax_ext/cfg.rs
+++ /dev/null
@@ -1,54 +0,0 @@
-/// The compiler code necessary to support the cfg! extension, which expands to
-/// a literal `true` or `false` based on whether the given cfg matches the
-/// current compilation environment.
-use errors::DiagnosticBuilder;
-
-use syntax::ast;
-use syntax::attr;
-use syntax::token;
-use syntax::tokenstream::TokenStream;
-use syntax_expand::base::{self, *};
-use syntax_pos::Span;
-
-pub fn expand_cfg(
-    cx: &mut ExtCtxt<'_>,
-    sp: Span,
-    tts: TokenStream,
-) -> Box<dyn base::MacResult + 'static> {
-    let sp = cx.with_def_site_ctxt(sp);
-
-    match parse_cfg(cx, sp, tts) {
-        Ok(cfg) => {
-            let matches_cfg = attr::cfg_matches(&cfg, cx.parse_sess, cx.ecfg.features);
-            MacEager::expr(cx.expr_bool(sp, matches_cfg))
-        }
-        Err(mut err) => {
-            err.emit();
-            DummyResult::any(sp)
-        }
-    }
-}
-
-fn parse_cfg<'a>(
-    cx: &mut ExtCtxt<'a>,
-    sp: Span,
-    tts: TokenStream,
-) -> Result<ast::MetaItem, DiagnosticBuilder<'a>> {
-    let mut p = cx.new_parser_from_tts(tts);
-
-    if p.token == token::Eof {
-        let mut err = cx.struct_span_err(sp, "macro requires a cfg-pattern as an argument");
-        err.span_label(sp, "cfg-pattern required");
-        return Err(err);
-    }
-
-    let cfg = p.parse_meta_item()?;
-
-    let _ = p.eat(&token::Comma);
-
-    if !p.eat(&token::Eof) {
-        return Err(cx.struct_span_err(sp, "expected 1 cfg-pattern"));
-    }
-
-    Ok(cfg)
-}