1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
12 // file at the top-level directory of this distribution and at
13 // http://rust-lang.org/COPYRIGHT.
15 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
16 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
17 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
18 // option. This file may not be copied, modified, or distributed
19 // except according to those terms.
21 //! the rustc crate store interface. This also includes types that
22 //! are *mostly* used as a part of that interface, but these should
23 //! probably get a better home if someone can find one.
26 use hir::def_id::{CrateNum, DefId, DefIndex};
27 use hir::map as hir_map;
28 use hir::map::definitions::{Definitions, DefKey, DefPathTable};
31 use middle::lang_items;
32 use ty::{self, TyCtxt};
34 use session::search_paths::PathKind;
35 use util::nodemap::{NodeSet, DefIdMap};
38 use std::path::{Path, PathBuf};
40 use owning_ref::ErasedBoxRef;
42 use syntax::ext::base::SyntaxExtension;
43 use syntax::symbol::Symbol;
45 use rustc_back::target::Target;
48 pub use self::NativeLibraryKind::*;
50 // lonely orphan structs and enums looking for a better home
52 #[derive(Clone, Debug, Copy)]
57 /// Where a crate came from on the local filesystem. One of these three options
59 #[derive(PartialEq, Clone, Debug)]
60 pub struct CrateSource {
61 pub dylib: Option<(PathBuf, PathKind)>,
62 pub rlib: Option<(PathBuf, PathKind)>,
63 pub rmeta: Option<(PathBuf, PathKind)>,
66 #[derive(RustcEncodable, RustcDecodable, Copy, Clone, Ord, PartialOrd, Eq, PartialEq, Debug)]
68 /// A dependency that is only used for its macros, none of which are visible from other crates.
69 /// These are included in the metadata only as placeholders and are ignored when decoding.
71 /// A dependency that is only used for its macros.
73 /// A dependency that is always injected into the dependency list and so
74 /// doesn't need to be linked to an rlib, e.g. the injected allocator.
76 /// A dependency that is required by an rlib version of this crate.
77 /// Ordinary `extern crate`s result in `Explicit` dependencies.
82 pub fn macros_only(self) -> bool {
84 DepKind::UnexportedMacrosOnly | DepKind::MacrosOnly => true,
85 DepKind::Implicit | DepKind::Explicit => false,
90 #[derive(PartialEq, Clone, Debug)]
98 pub fn is_some(&self) -> bool {
99 if let LibSource::Some(_) = *self {
106 pub fn option(&self) -> Option<PathBuf> {
108 LibSource::Some(ref p) => Some(p.clone()),
109 LibSource::MetadataOnly | LibSource::None => None,
114 #[derive(Copy, Debug, PartialEq, Clone, RustcEncodable, RustcDecodable)]
115 pub enum LinkagePreference {
120 #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, RustcEncodable, RustcDecodable)]
121 pub enum NativeLibraryKind {
122 /// native static library (.a archive)
124 /// native static library, which doesn't get bundled into .rlibs
125 NativeStaticNobundle,
128 /// default way to specify a dynamic library
132 #[derive(Clone, Hash, RustcEncodable, RustcDecodable)]
133 pub struct NativeLibrary {
134 pub kind: NativeLibraryKind,
136 pub cfg: Option<ast::MetaItem>,
137 pub foreign_items: Vec<DefIndex>,
140 pub enum LoadedMacro {
142 ProcMacro(Rc<SyntaxExtension>),
145 #[derive(Copy, Clone, Debug)]
146 pub struct ExternCrate {
147 /// def_id of an `extern crate` in the current crate that caused
148 /// this crate to be loaded; note that there could be multiple
152 /// span of the extern crate that caused this to be loaded
155 /// If true, then this crate is the crate named by the extern
156 /// crate referenced above. If false, then this crate is a dep
160 /// Number of links to reach the extern crate `def_id`
161 /// declaration; used to select the extern crate with the shortest
166 pub struct EncodedMetadata {
167 pub raw_data: Vec<u8>
170 impl EncodedMetadata {
171 pub fn new() -> EncodedMetadata {
173 raw_data: Vec::new(),
178 /// The hash for some metadata that (when saving) will be exported
179 /// from this crate, or which (when importing) was exported by an
181 #[derive(Debug, RustcEncodable, RustcDecodable, Copy, Clone)]
182 pub struct EncodedMetadataHash {
183 pub def_index: DefIndex,
184 pub hash: ich::Fingerprint,
187 /// The hash for some metadata that (when saving) will be exported
188 /// from this crate, or which (when importing) was exported by an
190 #[derive(Debug, RustcEncodable, RustcDecodable, Clone)]
191 pub struct EncodedMetadataHashes {
192 // Stable content hashes for things in crate metadata, indexed by DefIndex.
193 pub hashes: Vec<EncodedMetadataHash>,
196 impl EncodedMetadataHashes {
197 pub fn new() -> EncodedMetadataHashes {
198 EncodedMetadataHashes {
204 /// The backend's way to give the crate store access to the metadata in a library.
205 /// Note that it returns the raw metadata bytes stored in the library file, whether
206 /// it is compressed, uncompressed, some weird mix, etc.
207 /// rmeta files are backend independent and not handled here.
209 /// At the time of this writing, there is only one backend and one way to store
210 /// metadata in library -- this trait just serves to decouple rustc_metadata from
211 /// the archive reader, which depends on LLVM.
212 pub trait MetadataLoader {
213 fn get_rlib_metadata(&self,
216 -> Result<ErasedBoxRef<[u8]>, String>;
217 fn get_dylib_metadata(&self,
220 -> Result<ErasedBoxRef<[u8]>, String>;
223 /// A store of Rust crates, through with their metadata
225 pub trait CrateStore {
226 fn crate_data_as_rc_any(&self, krate: CrateNum) -> Rc<Any>;
228 // access to the metadata loader
229 fn metadata_loader(&self) -> &MetadataLoader;
232 fn visibility(&self, def: DefId) -> ty::Visibility;
233 fn visible_parent_map<'a>(&'a self, sess: &Session) -> ::std::cell::Ref<'a, DefIdMap<DefId>>;
234 fn item_generics_cloned(&self, def: DefId) -> ty::Generics;
237 fn implementations_of_trait(&self, filter: Option<DefId>) -> Vec<DefId>;
239 // trait/impl-item info
240 fn associated_item_cloned(&self, def: DefId) -> ty::AssociatedItem;
243 fn is_dllimport_foreign_item(&self, def: DefId) -> bool;
244 fn is_statically_included_foreign_item(&self, def_id: DefId) -> bool;
247 fn dep_kind(&self, cnum: CrateNum) -> DepKind;
248 fn export_macros(&self, cnum: CrateNum);
249 fn lang_items(&self, cnum: CrateNum) -> Vec<(DefIndex, usize)>;
250 fn missing_lang_items(&self, cnum: CrateNum) -> Vec<lang_items::LangItem>;
251 /// The name of the crate as it is referred to in source code of the current
253 fn crate_name(&self, cnum: CrateNum) -> Symbol;
254 /// The name of the crate as it is stored in the crate's metadata.
255 fn original_crate_name(&self, cnum: CrateNum) -> Symbol;
256 fn crate_hash(&self, cnum: CrateNum) -> Svh;
257 fn crate_disambiguator(&self, cnum: CrateNum) -> Symbol;
260 fn def_key(&self, def: DefId) -> DefKey;
261 fn def_path(&self, def: DefId) -> hir_map::DefPath;
262 fn def_path_hash(&self, def: DefId) -> hir_map::DefPathHash;
263 fn def_path_table(&self, cnum: CrateNum) -> Rc<DefPathTable>;
264 fn struct_field_names(&self, def: DefId) -> Vec<ast::Name>;
265 fn item_children(&self, did: DefId, sess: &Session) -> Vec<def::Export>;
266 fn load_macro(&self, did: DefId, sess: &Session) -> LoadedMacro;
269 fn item_body<'a, 'tcx>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId)
272 // This is basically a 1-based range of ints, which is a little
273 // silly - I may fix that.
274 fn crates(&self) -> Vec<CrateNum>;
275 fn used_libraries(&self) -> Vec<NativeLibrary>;
276 fn used_link_args(&self) -> Vec<String>;
279 fn used_crates(&self, prefer: LinkagePreference) -> Vec<(CrateNum, LibSource)>;
280 fn used_crate_source(&self, cnum: CrateNum) -> CrateSource;
281 fn extern_mod_stmt_cnum(&self, emod_id: ast::NodeId) -> Option<CrateNum>;
282 fn encode_metadata<'a, 'tcx>(&self,
283 tcx: TyCtxt<'a, 'tcx, 'tcx>,
284 link_meta: &LinkMeta,
286 -> (EncodedMetadata, EncodedMetadataHashes);
287 fn metadata_encoding_version(&self) -> &[u8];
290 // FIXME: find a better place for this?
291 pub fn validate_crate_name(sess: Option<&Session>, s: &str, sp: Option<Span>) {
292 let mut err_count = 0;
294 let mut say = |s: &str| {
296 (_, None) => bug!("{}", s),
297 (Some(sp), Some(sess)) => sess.span_err(sp, s),
298 (None, Some(sess)) => sess.err(s),
303 say("crate name must not be empty");
306 if c.is_alphanumeric() { continue }
307 if c == '_' { continue }
308 say(&format!("invalid character `{}` in crate name: `{}`", c, s));
313 sess.unwrap().abort_if_errors();
317 /// A dummy crate store that does not support any non-local crates,
318 /// for test purposes.
319 pub struct DummyCrateStore;
321 #[allow(unused_variables)]
322 impl CrateStore for DummyCrateStore {
323 fn crate_data_as_rc_any(&self, krate: CrateNum) -> Rc<Any>
324 { bug!("crate_data_as_rc_any") }
326 fn visibility(&self, def: DefId) -> ty::Visibility { bug!("visibility") }
327 fn visible_parent_map<'a>(&'a self, session: &Session)
328 -> ::std::cell::Ref<'a, DefIdMap<DefId>>
330 bug!("visible_parent_map")
332 fn item_generics_cloned(&self, def: DefId) -> ty::Generics
333 { bug!("item_generics_cloned") }
336 fn implementations_of_trait(&self, filter: Option<DefId>) -> Vec<DefId> { vec![] }
338 // trait/impl-item info
339 fn associated_item_cloned(&self, def: DefId) -> ty::AssociatedItem
340 { bug!("associated_item_cloned") }
343 fn is_dllimport_foreign_item(&self, id: DefId) -> bool { false }
344 fn is_statically_included_foreign_item(&self, def_id: DefId) -> bool { false }
347 fn lang_items(&self, cnum: CrateNum) -> Vec<(DefIndex, usize)>
348 { bug!("lang_items") }
349 fn missing_lang_items(&self, cnum: CrateNum) -> Vec<lang_items::LangItem>
350 { bug!("missing_lang_items") }
351 fn dep_kind(&self, cnum: CrateNum) -> DepKind { bug!("is_explicitly_linked") }
352 fn export_macros(&self, cnum: CrateNum) { bug!("export_macros") }
353 fn crate_name(&self, cnum: CrateNum) -> Symbol { bug!("crate_name") }
354 fn original_crate_name(&self, cnum: CrateNum) -> Symbol {
355 bug!("original_crate_name")
357 fn crate_hash(&self, cnum: CrateNum) -> Svh { bug!("crate_hash") }
358 fn crate_disambiguator(&self, cnum: CrateNum)
359 -> Symbol { bug!("crate_disambiguator") }
362 fn def_key(&self, def: DefId) -> DefKey { bug!("def_key") }
363 fn def_path(&self, def: DefId) -> hir_map::DefPath {
364 bug!("relative_def_path")
366 fn def_path_hash(&self, def: DefId) -> hir_map::DefPathHash {
367 bug!("def_path_hash")
369 fn def_path_table(&self, cnum: CrateNum) -> Rc<DefPathTable> {
370 bug!("def_path_table")
372 fn struct_field_names(&self, def: DefId) -> Vec<ast::Name> { bug!("struct_field_names") }
373 fn item_children(&self, did: DefId, sess: &Session) -> Vec<def::Export> {
374 bug!("item_children")
376 fn load_macro(&self, did: DefId, sess: &Session) -> LoadedMacro { bug!("load_macro") }
379 fn item_body<'a, 'tcx>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId)
384 // This is basically a 1-based range of ints, which is a little
385 // silly - I may fix that.
386 fn crates(&self) -> Vec<CrateNum> { vec![] }
387 fn used_libraries(&self) -> Vec<NativeLibrary> { vec![] }
388 fn used_link_args(&self) -> Vec<String> { vec![] }
391 fn used_crates(&self, prefer: LinkagePreference) -> Vec<(CrateNum, LibSource)>
393 fn used_crate_source(&self, cnum: CrateNum) -> CrateSource { bug!("used_crate_source") }
394 fn extern_mod_stmt_cnum(&self, emod_id: ast::NodeId) -> Option<CrateNum> { None }
395 fn encode_metadata<'a, 'tcx>(&self,
396 tcx: TyCtxt<'a, 'tcx, 'tcx>,
397 link_meta: &LinkMeta,
399 -> (EncodedMetadata, EncodedMetadataHashes) {
400 bug!("encode_metadata")
402 fn metadata_encoding_version(&self) -> &[u8] { bug!("metadata_encoding_version") }
404 // access to the metadata loader
405 fn metadata_loader(&self) -> &MetadataLoader { bug!("metadata_loader") }
408 pub trait CrateLoader {
409 fn process_item(&mut self, item: &ast::Item, defs: &Definitions);
410 fn postprocess(&mut self, krate: &ast::Crate);