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Code Issues Releases Activity

Write metadata for crate attributes. Issue #487

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This commit is contained in:
Brian Anderson 2011-06-27 19:41:48 -07:00
parent 894e2229ac
commit f53c4f79d7
4 changed files with 74 additions and 22 deletions
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37
src/comp/metadata/decoder.rs
View File

@ -259,7 +259,7 @@ fn item_kind_to_str(u8 kind) -> str {
fn get_meta_items(&ebml::doc md) -> vec[ast::meta_item] {
let vec[ast::meta_item] items = [];
for each (ebml::doc meta_item_doc in
ebml::tagged_docs(md, tag_meta_item)) {
ebml::tagged_docs(md, tag_meta_item_key_value)) {
auto kd = ebml::get_doc(meta_item_doc, tag_meta_item_key);
auto vd = ebml::get_doc(meta_item_doc, tag_meta_item_value);
auto k = str::unsafe_from_bytes(ebml::doc_data(kd));
@ -270,6 +270,27 @@ fn get_meta_items(&ebml::doc md) -> vec[ast::meta_item] {
ret items;
}
fn get_attributes(&ebml::doc md) -> vec[ast::attribute] {
let vec[ast::attribute] attrs = [];
alt (ebml::maybe_get_doc(md, tag_attributes)) {
case (option::some(?attrs_d)) {
for each (ebml::doc attr_doc in
ebml::tagged_docs(attrs_d, tag_attribute)) {
auto meta_items = get_meta_items(attr_doc);
// Currently it's only possible to have a single meta item on
// an attribute
assert (vec::len(meta_items) == 1u);
auto meta_item = meta_items.(0);
attrs += [rec(node=rec(style=ast::attr_outer,
value=meta_item),
span=rec(lo=0u, hi=0u))];
}
}
case (option::none) { }
}
ret attrs;
}
fn list_meta_items(&ebml::doc meta_items, io::writer out) {
for (ast::meta_item mi in get_meta_items(meta_items)) {
out.write_str(#fmt("%s\n", pprust::meta_item_to_str(mi)));
@ -277,10 +298,18 @@ fn list_meta_items(&ebml::doc meta_items, io::writer out) {
}
fn list_crate_attributes(&ebml::doc md, io::writer out) {
out.write_str("=Crate=\n");
out.write_str("=Crate=");
// FIXME: This is transitional until attributes are snapshotted
out.write_str("old-style:\n");
auto meta_items = ebml::get_doc(md, tag_meta_export);
list_meta_items(meta_items, out);
out.write_str("\n");
for (ast::attribute attr in get_attributes(md)) {
out.write_str(#fmt("%s", pprust::attribute_to_str(attr)));
}
out.write_str("\n\n");
}
fn list_crate_items(vec[u8] bytes, &ebml::doc md, io::writer out) {
@ -316,7 +345,7 @@ fn get_exported_metadata(&session::session sess, &str path, &vec[u8] data) ->
ebml::get_doc(ebml::new_doc(data), tag_meta_export);
auto mm = common::new_str_hash[str]();
for each (ebml::doc m in
ebml::tagged_docs(meta_items, tag_meta_item)) {
ebml::tagged_docs(meta_items, tag_meta_item_key_value)) {
auto kd = ebml::get_doc(m, tag_meta_item_key);
auto vd = ebml::get_doc(m, tag_meta_item_value);
auto k = str::unsafe_from_bytes(ebml::doc_data(kd));

48
src/comp/metadata/encoder.rs
View File

@ -416,25 +416,36 @@ fn write_int(&io::writer writer, &int n) {
writer.write_be_uint(n as uint, 4u);
}
fn encode_meta_items(&ebml::writer ebml_w, &crate crate) {
fn encode_meta_item(&ebml::writer ebml_w, &meta_item mi) {
// FIXME (#487): Support all forms of meta item
ebml::start_tag(ebml_w, tag_meta_item);
alt (mi.node) {
case (meta_key_value(?key, ?value)) {
ebml::start_tag(ebml_w, tag_meta_item_key);
ebml_w.writer.write(str::bytes(key));
ebml::end_tag(ebml_w);
ebml::start_tag(ebml_w, tag_meta_item_value);
ebml_w.writer.write(str::bytes(value));
ebml::end_tag(ebml_w);
}
case (_) {
log_err "unimplemented meta_item type";
}
fn encode_meta_item(&ebml::writer ebml_w, &meta_item mi) {
// FIXME (#487): Support all forms of meta item
ebml::start_tag(ebml_w, tag_meta_item_key_value);
alt (mi.node) {
case (meta_key_value(?key, ?value)) {
ebml::start_tag(ebml_w, tag_meta_item_key);
ebml_w.writer.write(str::bytes(key));
ebml::end_tag(ebml_w);
ebml::start_tag(ebml_w, tag_meta_item_value);
ebml_w.writer.write(str::bytes(value));
ebml::end_tag(ebml_w);
}
case (_) {
log_err "unimplemented meta_item type";
}
}
ebml::end_tag(ebml_w);
}
fn encode_attributes(&ebml::writer ebml_w, &vec[attribute] attrs) {
ebml::start_tag(ebml_w, tag_attributes);
for (attribute attr in attrs) {
ebml::start_tag(ebml_w, tag_attribute);
encode_meta_item(ebml_w, attr.node.value);
ebml::end_tag(ebml_w);
}
ebml::end_tag(ebml_w);
}
fn encode_meta_items(&ebml::writer ebml_w, &crate crate) {
ebml::start_tag(ebml_w, tag_meta_export);
for each (@meta_item mi in crate_export_metas(crate)) {
encode_meta_item(ebml_w, *mi);
@ -451,9 +462,12 @@ fn encode_metadata(&@crate_ctxt cx, &@crate crate) -> str {
auto string_w = io::string_writer();
auto buf_w = string_w.get_writer().get_buf_writer();
auto ebml_w = ebml::create_writer(buf_w);
// Encode the meta items
// FIXME: This is the old way of encoding crate meta items
// Remove after going through a snapshot cycle
encode_meta_items(ebml_w, *crate);
// Encode crate attributes
encode_attributes(ebml_w, crate.node.attrs);
// Encode and index the paths.
ebml::start_tag(ebml_w, tag_paths);

7
src/comp/metadata/tags.rs
View File

@ -44,8 +44,13 @@ const uint tag_meta_export = 0x16u;
const uint tag_meta_local = 0x17u;
const uint tag_meta_item = 0x18u;
const uint tag_meta_item_key_value = 0x18u;
const uint tag_meta_item_key = 0x19u;
const uint tag_meta_item_value = 0x20u;
const uint tag_attributes = 0x21u;
const uint tag_attribute = 0x22u;

4
src/comp/pretty/pprust.rs
View File

@ -84,6 +84,10 @@ fn meta_item_to_str(&ast::meta_item mi) -> str {
ret to_str(@mi, print_meta_item);
}
fn attribute_to_str(&ast::attribute attr) -> str {
be to_str(attr, print_attribute);
}
fn cbox(&ps s, uint u) {
vec::push(s.boxes, pp::consistent);
pp::cbox(s.s, u);