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Code Issues Releases Activity

Remove hack to break the AST fold cycle. Closes #998

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This commit is contained in:
Brian Anderson 2011-10-21 17:43:31 -07:00
parent 160c56e768
commit 81a44ccacf
1 changed files with 2 additions and 38 deletions
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40
src/comp/syntax/fold.rs
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@ -7,7 +7,6 @@ export ast_fold_precursor;
export ast_fold;
export default_ast_fold;
export make_fold;
export dummy_out;
export noop_fold_crate;
export noop_fold_item;
export noop_fold_expr;
@ -529,42 +528,7 @@ fn default_ast_fold() -> @ast_fold_precursor {
new_span: noop_span};
}
fn dummy_out(a: ast_fold) {
*a =
{fold_crate: nf_crate_dummy,
fold_crate_directive: nf_crate_directive_dummy,
fold_view_item: nf_view_item_dummy,
fold_native_item: nf_native_item_dummy,
fold_item: nf_item_dummy,
fold_item_underscore: nf_item_underscore_dummy,
fold_method: nf_method_dummy,
fold_block: nf_blk_dummy,
fold_stmt: nf_stmt_dummy,
fold_arm: nf_arm_dummy,
fold_pat: nf_pat_dummy,
fold_decl: nf_decl_dummy,
fold_expr: nf_expr_dummy,
fold_ty: nf_ty_dummy,
fold_constr: nf_constr_dummy,
fold_fn: nf_fn_dummy,
fold_mod: nf_mod_dummy,
fold_native_mod: nf_native_mod_dummy,
fold_variant: nf_variant_dummy,
fold_ident: nf_ident_dummy,
fold_path: nf_path_dummy,
fold_local: nf_local_dummy,
map_exprs: noop_map_exprs,
new_id: noop_id,
new_span: noop_span};
}
// FIXME: Fold has a circular reference that has to be broken. With GC this
// can go away
resource foldres(f: ast_fold) {
dummy_out(f);
}
fn make_fold(afp: ast_fold_precursor) -> @foldres {
fn make_fold(afp: ast_fold_precursor) -> ast_fold {
// FIXME: Have to bind all the bare functions into shared functions
// because @mutable is invariant with respect to its contents
let result: ast_fold =
@ -702,7 +666,7 @@ fn make_fold(afp: ast_fold_precursor) -> @foldres {
map_exprs: afp.map_exprs,
new_id: afp.new_id,
new_span: afp.new_span};
ret @foldres(result);
ret result;
}