Use attributes for conditional compilation in std.rc
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@ -99,11 +99,15 @@ fn eq(@ast::meta_item a, @ast::meta_item b) -> bool {
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}
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fn contains(&vec[@ast::meta_item] haystack, @ast::meta_item needle) -> bool {
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log #fmt("looking for %s", pretty::pprust::meta_item_to_str(*needle));
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for (@ast::meta_item item in haystack) {
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log #fmt("looking in %s", pretty::pprust::meta_item_to_str(*item));
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if (eq(item, needle)) {
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log "found it!";
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ret true;
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}
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}
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log "found it not :(";
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ret false;
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}
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@ -71,12 +71,30 @@ fn fold_block(&ast::crate_cfg cfg, &ast::block_ b,
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// configuration based on the item's attributes
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fn in_cfg(&ast::crate_cfg cfg, &@ast::item item) -> bool {
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// The "cfg" attributes on the item
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auto item_cfg_attrs = attr::find_attrs_by_name(item.attrs, "cfg");
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auto item_has_cfg_attrs = vec::len(item_cfg_attrs) > 0u;
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if (!item_has_cfg_attrs) { ret true; }
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auto item_cfg_metas = attr::attr_metas(item_cfg_attrs);
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// Pull the inner meta_items from the #[cfg(meta_item, ...)] attributes,
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// so we can match against them. This is the list of configurations for
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// which the item is valid
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auto item_cfg_metas = {
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fn extract_metas(&vec[@ast::meta_item] inner_items,
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&@ast::meta_item cfg_item)
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-> vec[@ast::meta_item] {
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alt (cfg_item.node) {
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case (ast::meta_list(?name, ?items)) {
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assert name == "cfg";
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inner_items + items
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}
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case (_) { inner_items }
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}
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}
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auto cfg_metas = attr::attr_metas(item_cfg_attrs);
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vec::foldl(extract_metas, [], cfg_metas)
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};
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for (@ast::meta_item cfg_mi in item_cfg_metas) {
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if (attr::contains(cfg, cfg_mi)) {
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@ -49,18 +49,20 @@ auth rand::mk_rng = unsafe;
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// TODO: Have each os module re-export everything from genericos.
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mod generic_os;
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alt (target_os) {
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case ("win32") {
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mod os = "win32_os.rs";
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mod os_fs = "win32_fs.rs";
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} case ("macos") {
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mod os = "macos_os.rs";
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mod os_fs = "posix_fs.rs";
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} case (_) {
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mod os = "linux_os.rs";
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mod os_fs = "posix_fs.rs";
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}
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}
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#[cfg(target_os = "win32")]
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mod os = "win32_os.rs";
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#[cfg(target_os = "win32")]
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mod os_fs = "win32_fs.rs";
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#[cfg(target_os = "macos")]
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mod os = "macos_os.rs";
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#[cfg(target_os = "macos")]
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mod os_fs = "posix_fs.rs";
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#[cfg(target_os = "linux")]
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mod os = "linux_os.rs";
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#[cfg(target_os = "linux")]
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mod os_fs = "posix_fs.rs";
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mod run = "run_program.rs";
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mod fs;
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