1 files changed, 0 insertions, 137 deletions
diff --git a/src/libsyntax_ext/deriving/debug.rs b/src/libsyntax_ext/deriving/debug.rs
deleted file mode 100644
index c145b63274e..00000000000
--- a/src/libsyntax_ext/deriving/debug.rs
+++ /dev/null
@@ -1,137 +0,0 @@
-use crate::deriving::generic::ty::*;
-use crate::deriving::generic::*;
-use crate::deriving::path_std;
-
-use syntax::ast::{self, Ident};
-use syntax::ast::{Expr, MetaItem};
-use syntax::ptr::P;
-use syntax::symbol::sym;
-use syntax_expand::base::{Annotatable, ExtCtxt};
-use syntax_pos::{Span, DUMMY_SP};
-
-pub fn expand_deriving_debug(
-    cx: &mut ExtCtxt<'_>,
-    span: Span,
-    mitem: &MetaItem,
-    item: &Annotatable,
-    push: &mut dyn FnMut(Annotatable),
-) {
-    // &mut ::std::fmt::Formatter
-    let fmtr =
-        Ptr(Box::new(Literal(path_std!(cx, fmt::Formatter))), Borrowed(None, ast::Mutability::Mut));
-
-    let trait_def = TraitDef {
-        span,
-        attributes: Vec::new(),
-        path: path_std!(cx, fmt::Debug),
-        additional_bounds: Vec::new(),
-        generics: LifetimeBounds::empty(),
-        is_unsafe: false,
-        supports_unions: false,
-        methods: vec![MethodDef {
-            name: "fmt",
-            generics: LifetimeBounds::empty(),
-            explicit_self: borrowed_explicit_self(),
-            args: vec![(fmtr, "f")],
-            ret_ty: Literal(path_std!(cx, fmt::Result)),
-            attributes: Vec::new(),
-            is_unsafe: false,
-            unify_fieldless_variants: false,
-            combine_substructure: combine_substructure(Box::new(|a, b, c| {
-                show_substructure(a, b, c)
-            })),
-        }],
-        associated_types: Vec::new(),
-    };
-    trait_def.expand(cx, mitem, item, push)
-}
-
-/// We use the debug builders to do the heavy lifting here
-fn show_substructure(cx: &mut ExtCtxt<'_>, span: Span, substr: &Substructure<'_>) -> P<Expr> {
-    // build fmt.debug_struct(<name>).field(<fieldname>, &<fieldval>)....build()
-    // or fmt.debug_tuple(<name>).field(&<fieldval>)....build()
-    // based on the "shape".
-    let (ident, vdata, fields) = match substr.fields {
-        Struct(vdata, fields) => (substr.type_ident, *vdata, fields),
-        EnumMatching(_, _, v, fields) => (v.ident, &v.data, fields),
-        EnumNonMatchingCollapsed(..) | StaticStruct(..) | StaticEnum(..) => {
-            cx.span_bug(span, "nonsensical .fields in `#[derive(Debug)]`")
-        }
-    };
-
-    // We want to make sure we have the ctxt set so that we can use unstable methods
-    let span = cx.with_def_site_ctxt(span);
-    let name = cx.expr_lit(span, ast::LitKind::Str(ident.name, ast::StrStyle::Cooked));
-    let builder = cx.ident_of("debug_trait_builder", span);
-    let builder_expr = cx.expr_ident(span, builder.clone());
-
-    let fmt = substr.nonself_args[0].clone();
-
-    let mut stmts = vec![];
-    match vdata {
-        ast::VariantData::Tuple(..) | ast::VariantData::Unit(..) => {
-            // tuple struct/"normal" variant
-            let expr = cx.expr_method_call(span, fmt, cx.ident_of("debug_tuple", span), vec![name]);
-            stmts.push(cx.stmt_let(span, true, builder, expr));
-
-            for field in fields {
-                // Use double indirection to make sure this works for unsized types
-                let field = cx.expr_addr_of(field.span, field.self_.clone());
-                let field = cx.expr_addr_of(field.span, field);
-
-                let expr = cx.expr_method_call(
-                    span,
-                    builder_expr.clone(),
-                    Ident::new(sym::field, span),
-                    vec![field],
-                );
-
-                // Use `let _ = expr;` to avoid triggering the
-                // unused_results lint.
-                stmts.push(stmt_let_undescore(cx, span, expr));
-            }
-        }
-        ast::VariantData::Struct(..) => {
-            // normal struct/struct variant
-            let expr =
-                cx.expr_method_call(span, fmt, cx.ident_of("debug_struct", span), vec![name]);
-            stmts.push(cx.stmt_let(DUMMY_SP, true, builder, expr));
-
-            for field in fields {
-                let name = cx.expr_lit(
-                    field.span,
-                    ast::LitKind::Str(field.name.unwrap().name, ast::StrStyle::Cooked),
-                );
-
-                // Use double indirection to make sure this works for unsized types
-                let field = cx.expr_addr_of(field.span, field.self_.clone());
-                let field = cx.expr_addr_of(field.span, field);
-                let expr = cx.expr_method_call(
-                    span,
-                    builder_expr.clone(),
-                    Ident::new(sym::field, span),
-                    vec![name, field],
-                );
-                stmts.push(stmt_let_undescore(cx, span, expr));
-            }
-        }
-    }
-
-    let expr = cx.expr_method_call(span, builder_expr, cx.ident_of("finish", span), vec![]);
-
-    stmts.push(cx.stmt_expr(expr));
-    let block = cx.block(span, stmts);
-    cx.expr_block(block)
-}
-
-fn stmt_let_undescore(cx: &mut ExtCtxt<'_>, sp: Span, expr: P<ast::Expr>) -> ast::Stmt {
-    let local = P(ast::Local {
-        pat: cx.pat_wild(sp),
-        ty: None,
-        init: Some(expr),
-        id: ast::DUMMY_NODE_ID,
-        span: sp,
-        attrs: ast::AttrVec::new(),
-    });
-    ast::Stmt { id: ast::DUMMY_NODE_ID, kind: ast::StmtKind::Local(local), span: sp }
-}