1109 lines
43 KiB
Rust
1109 lines
43 KiB
Rust
#![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
|
|
#![feature(nll)]
|
|
#![recursion_limit = "256"]
|
|
|
|
mod dump_visitor;
|
|
mod dumper;
|
|
#[macro_use]
|
|
mod span_utils;
|
|
mod sig;
|
|
|
|
use rustc::middle::cstore::ExternCrate;
|
|
use rustc::middle::privacy::AccessLevels;
|
|
use rustc::ty::{self, DefIdTree, TyCtxt};
|
|
use rustc::{bug, span_bug};
|
|
use rustc_ast::ast::{self, Attribute, NodeId, PatKind, DUMMY_NODE_ID};
|
|
use rustc_ast::util::comments::strip_doc_comment_decoration;
|
|
use rustc_ast::visit::{self, Visitor};
|
|
use rustc_ast_pretty::pprust::{self, param_to_string, ty_to_string};
|
|
use rustc_hir as hir;
|
|
use rustc_hir::def::{CtorOf, DefKind as HirDefKind, Res};
|
|
use rustc_hir::def_id::{DefId, LOCAL_CRATE};
|
|
use rustc_hir::Node;
|
|
use rustc_session::config::{CrateType, Input, OutputType};
|
|
use rustc_session::output::{filename_for_metadata, out_filename};
|
|
use rustc_span::source_map::Spanned;
|
|
use rustc_span::*;
|
|
|
|
use std::cell::Cell;
|
|
use std::default::Default;
|
|
use std::env;
|
|
use std::fs::File;
|
|
use std::io::BufWriter;
|
|
use std::path::{Path, PathBuf};
|
|
|
|
use dump_visitor::DumpVisitor;
|
|
use span_utils::SpanUtils;
|
|
|
|
use rls_data::config::Config;
|
|
use rls_data::{
|
|
Analysis, Def, DefKind, ExternalCrateData, GlobalCrateId, Impl, ImplKind, MacroRef, Ref,
|
|
RefKind, Relation, RelationKind, SpanData,
|
|
};
|
|
|
|
use log::{debug, error, info};
|
|
|
|
pub struct SaveContext<'l, 'tcx> {
|
|
tcx: TyCtxt<'tcx>,
|
|
tables: &'l ty::TypeckTables<'tcx>,
|
|
/// Used as a fallback when nesting the typeck tables during item processing
|
|
/// (if these are not available for that item, e.g. don't own a body)
|
|
empty_tables: &'l ty::TypeckTables<'tcx>,
|
|
access_levels: &'l AccessLevels,
|
|
span_utils: SpanUtils<'tcx>,
|
|
config: Config,
|
|
impl_counter: Cell<u32>,
|
|
}
|
|
|
|
#[derive(Debug)]
|
|
pub enum Data {
|
|
RefData(Ref),
|
|
DefData(Def),
|
|
RelationData(Relation, Impl),
|
|
}
|
|
|
|
impl<'l, 'tcx> SaveContext<'l, 'tcx> {
|
|
fn span_from_span(&self, span: Span) -> SpanData {
|
|
use rls_span::{Column, Row};
|
|
|
|
let sm = self.tcx.sess.source_map();
|
|
let start = sm.lookup_char_pos(span.lo());
|
|
let end = sm.lookup_char_pos(span.hi());
|
|
|
|
SpanData {
|
|
file_name: start.file.name.to_string().into(),
|
|
byte_start: span.lo().0,
|
|
byte_end: span.hi().0,
|
|
line_start: Row::new_one_indexed(start.line as u32),
|
|
line_end: Row::new_one_indexed(end.line as u32),
|
|
column_start: Column::new_one_indexed(start.col.0 as u32 + 1),
|
|
column_end: Column::new_one_indexed(end.col.0 as u32 + 1),
|
|
}
|
|
}
|
|
|
|
// Returns path to the compilation output (e.g., libfoo-12345678.rmeta)
|
|
pub fn compilation_output(&self, crate_name: &str) -> PathBuf {
|
|
let sess = &self.tcx.sess;
|
|
// Save-analysis is emitted per whole session, not per each crate type
|
|
let crate_type = sess.crate_types.borrow()[0];
|
|
let outputs = &*self.tcx.output_filenames(LOCAL_CRATE);
|
|
|
|
if outputs.outputs.contains_key(&OutputType::Metadata) {
|
|
filename_for_metadata(sess, crate_name, outputs)
|
|
} else if outputs.outputs.should_codegen() {
|
|
out_filename(sess, crate_type, outputs, crate_name)
|
|
} else {
|
|
// Otherwise it's only a DepInfo, in which case we return early and
|
|
// not even reach the analysis stage.
|
|
unreachable!()
|
|
}
|
|
}
|
|
|
|
// List external crates used by the current crate.
|
|
pub fn get_external_crates(&self) -> Vec<ExternalCrateData> {
|
|
let mut result = Vec::with_capacity(self.tcx.crates().len());
|
|
|
|
for &n in self.tcx.crates().iter() {
|
|
let span = match self.tcx.extern_crate(n.as_def_id()) {
|
|
Some(&ExternCrate { span, .. }) => span,
|
|
None => {
|
|
debug!("skipping crate {}, no data", n);
|
|
continue;
|
|
}
|
|
};
|
|
let lo_loc = self.span_utils.sess.source_map().lookup_char_pos(span.lo());
|
|
result.push(ExternalCrateData {
|
|
// FIXME: change file_name field to PathBuf in rls-data
|
|
// https://github.com/nrc/rls-data/issues/7
|
|
file_name: self.span_utils.make_filename_string(&lo_loc.file),
|
|
num: n.as_u32(),
|
|
id: GlobalCrateId {
|
|
name: self.tcx.crate_name(n).to_string(),
|
|
disambiguator: self.tcx.crate_disambiguator(n).to_fingerprint().as_value(),
|
|
},
|
|
});
|
|
}
|
|
|
|
result
|
|
}
|
|
|
|
pub fn get_extern_item_data(&self, item: &ast::ForeignItem) -> Option<Data> {
|
|
let qualname = format!(
|
|
"::{}",
|
|
self.tcx.def_path_str(self.tcx.hir().local_def_id_from_node_id(item.id))
|
|
);
|
|
match item.kind {
|
|
ast::ForeignItemKind::Fn(_, ref sig, ref generics, _) => {
|
|
filter!(self.span_utils, item.ident.span);
|
|
|
|
Some(Data::DefData(Def {
|
|
kind: DefKind::ForeignFunction,
|
|
id: id_from_node_id(item.id, self),
|
|
span: self.span_from_span(item.ident.span),
|
|
name: item.ident.to_string(),
|
|
qualname,
|
|
value: make_signature(&sig.decl, generics),
|
|
parent: None,
|
|
children: vec![],
|
|
decl_id: None,
|
|
docs: self.docs_for_attrs(&item.attrs),
|
|
sig: sig::foreign_item_signature(item, self),
|
|
attributes: lower_attributes(item.attrs.clone(), self),
|
|
}))
|
|
}
|
|
ast::ForeignItemKind::Static(ref ty, _, _) => {
|
|
filter!(self.span_utils, item.ident.span);
|
|
|
|
let id = id_from_node_id(item.id, self);
|
|
let span = self.span_from_span(item.ident.span);
|
|
|
|
Some(Data::DefData(Def {
|
|
kind: DefKind::ForeignStatic,
|
|
id,
|
|
span,
|
|
name: item.ident.to_string(),
|
|
qualname,
|
|
value: ty_to_string(ty),
|
|
parent: None,
|
|
children: vec![],
|
|
decl_id: None,
|
|
docs: self.docs_for_attrs(&item.attrs),
|
|
sig: sig::foreign_item_signature(item, self),
|
|
attributes: lower_attributes(item.attrs.clone(), self),
|
|
}))
|
|
}
|
|
// FIXME(plietar): needs a new DefKind in rls-data
|
|
ast::ForeignItemKind::TyAlias(..) => None,
|
|
ast::ForeignItemKind::MacCall(..) => None,
|
|
}
|
|
}
|
|
|
|
pub fn get_item_data(&self, item: &ast::Item) -> Option<Data> {
|
|
match item.kind {
|
|
ast::ItemKind::Fn(_, ref sig, .., ref generics, _) => {
|
|
let qualname = format!(
|
|
"::{}",
|
|
self.tcx.def_path_str(self.tcx.hir().local_def_id_from_node_id(item.id))
|
|
);
|
|
filter!(self.span_utils, item.ident.span);
|
|
Some(Data::DefData(Def {
|
|
kind: DefKind::Function,
|
|
id: id_from_node_id(item.id, self),
|
|
span: self.span_from_span(item.ident.span),
|
|
name: item.ident.to_string(),
|
|
qualname,
|
|
value: make_signature(&sig.decl, generics),
|
|
parent: None,
|
|
children: vec![],
|
|
decl_id: None,
|
|
docs: self.docs_for_attrs(&item.attrs),
|
|
sig: sig::item_signature(item, self),
|
|
attributes: lower_attributes(item.attrs.clone(), self),
|
|
}))
|
|
}
|
|
ast::ItemKind::Static(ref typ, ..) => {
|
|
let qualname = format!(
|
|
"::{}",
|
|
self.tcx.def_path_str(self.tcx.hir().local_def_id_from_node_id(item.id))
|
|
);
|
|
|
|
filter!(self.span_utils, item.ident.span);
|
|
|
|
let id = id_from_node_id(item.id, self);
|
|
let span = self.span_from_span(item.ident.span);
|
|
|
|
Some(Data::DefData(Def {
|
|
kind: DefKind::Static,
|
|
id,
|
|
span,
|
|
name: item.ident.to_string(),
|
|
qualname,
|
|
value: ty_to_string(&typ),
|
|
parent: None,
|
|
children: vec![],
|
|
decl_id: None,
|
|
docs: self.docs_for_attrs(&item.attrs),
|
|
sig: sig::item_signature(item, self),
|
|
attributes: lower_attributes(item.attrs.clone(), self),
|
|
}))
|
|
}
|
|
ast::ItemKind::Const(_, ref typ, _) => {
|
|
let qualname = format!(
|
|
"::{}",
|
|
self.tcx.def_path_str(self.tcx.hir().local_def_id_from_node_id(item.id))
|
|
);
|
|
filter!(self.span_utils, item.ident.span);
|
|
|
|
let id = id_from_node_id(item.id, self);
|
|
let span = self.span_from_span(item.ident.span);
|
|
|
|
Some(Data::DefData(Def {
|
|
kind: DefKind::Const,
|
|
id,
|
|
span,
|
|
name: item.ident.to_string(),
|
|
qualname,
|
|
value: ty_to_string(typ),
|
|
parent: None,
|
|
children: vec![],
|
|
decl_id: None,
|
|
docs: self.docs_for_attrs(&item.attrs),
|
|
sig: sig::item_signature(item, self),
|
|
attributes: lower_attributes(item.attrs.clone(), self),
|
|
}))
|
|
}
|
|
ast::ItemKind::Mod(ref m) => {
|
|
let qualname = format!(
|
|
"::{}",
|
|
self.tcx.def_path_str(self.tcx.hir().local_def_id_from_node_id(item.id))
|
|
);
|
|
|
|
let sm = self.tcx.sess.source_map();
|
|
let filename = sm.span_to_filename(m.inner);
|
|
|
|
filter!(self.span_utils, item.ident.span);
|
|
|
|
Some(Data::DefData(Def {
|
|
kind: DefKind::Mod,
|
|
id: id_from_node_id(item.id, self),
|
|
name: item.ident.to_string(),
|
|
qualname,
|
|
span: self.span_from_span(item.ident.span),
|
|
value: filename.to_string(),
|
|
parent: None,
|
|
children: m.items.iter().map(|i| id_from_node_id(i.id, self)).collect(),
|
|
decl_id: None,
|
|
docs: self.docs_for_attrs(&item.attrs),
|
|
sig: sig::item_signature(item, self),
|
|
attributes: lower_attributes(item.attrs.clone(), self),
|
|
}))
|
|
}
|
|
ast::ItemKind::Enum(ref def, _) => {
|
|
let name = item.ident.to_string();
|
|
let qualname = format!(
|
|
"::{}",
|
|
self.tcx.def_path_str(self.tcx.hir().local_def_id_from_node_id(item.id))
|
|
);
|
|
filter!(self.span_utils, item.ident.span);
|
|
let variants_str =
|
|
def.variants.iter().map(|v| v.ident.to_string()).collect::<Vec<_>>().join(", ");
|
|
let value = format!("{}::{{{}}}", name, variants_str);
|
|
Some(Data::DefData(Def {
|
|
kind: DefKind::Enum,
|
|
id: id_from_node_id(item.id, self),
|
|
span: self.span_from_span(item.ident.span),
|
|
name,
|
|
qualname,
|
|
value,
|
|
parent: None,
|
|
children: def.variants.iter().map(|v| id_from_node_id(v.id, self)).collect(),
|
|
decl_id: None,
|
|
docs: self.docs_for_attrs(&item.attrs),
|
|
sig: sig::item_signature(item, self),
|
|
attributes: lower_attributes(item.attrs.clone(), self),
|
|
}))
|
|
}
|
|
ast::ItemKind::Impl { ref of_trait, ref self_ty, ref items, .. } => {
|
|
if let ast::TyKind::Path(None, ref path) = self_ty.kind {
|
|
// Common case impl for a struct or something basic.
|
|
if generated_code(path.span) {
|
|
return None;
|
|
}
|
|
let sub_span = path.segments.last().unwrap().ident.span;
|
|
filter!(self.span_utils, sub_span);
|
|
|
|
let impl_id = self.next_impl_id();
|
|
let span = self.span_from_span(sub_span);
|
|
|
|
let type_data = self.lookup_def_id(self_ty.id);
|
|
type_data.map(|type_data| {
|
|
Data::RelationData(
|
|
Relation {
|
|
kind: RelationKind::Impl { id: impl_id },
|
|
span: span.clone(),
|
|
from: id_from_def_id(type_data),
|
|
to: of_trait
|
|
.as_ref()
|
|
.and_then(|t| self.lookup_def_id(t.ref_id))
|
|
.map(id_from_def_id)
|
|
.unwrap_or_else(|| null_id()),
|
|
},
|
|
Impl {
|
|
id: impl_id,
|
|
kind: match *of_trait {
|
|
Some(_) => ImplKind::Direct,
|
|
None => ImplKind::Inherent,
|
|
},
|
|
span,
|
|
value: String::new(),
|
|
parent: None,
|
|
children: items
|
|
.iter()
|
|
.map(|i| id_from_node_id(i.id, self))
|
|
.collect(),
|
|
docs: String::new(),
|
|
sig: None,
|
|
attributes: vec![],
|
|
},
|
|
)
|
|
})
|
|
} else {
|
|
None
|
|
}
|
|
}
|
|
_ => {
|
|
// FIXME
|
|
bug!();
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn get_field_data(&self, field: &ast::StructField, scope: NodeId) -> Option<Def> {
|
|
if let Some(ident) = field.ident {
|
|
let name = ident.to_string();
|
|
let qualname = format!(
|
|
"::{}::{}",
|
|
self.tcx.def_path_str(self.tcx.hir().local_def_id_from_node_id(scope)),
|
|
ident
|
|
);
|
|
filter!(self.span_utils, ident.span);
|
|
let def_id = self.tcx.hir().local_def_id_from_node_id(field.id);
|
|
let typ = self.tcx.type_of(def_id).to_string();
|
|
|
|
let id = id_from_node_id(field.id, self);
|
|
let span = self.span_from_span(ident.span);
|
|
|
|
Some(Def {
|
|
kind: DefKind::Field,
|
|
id,
|
|
span,
|
|
name,
|
|
qualname,
|
|
value: typ,
|
|
parent: Some(id_from_node_id(scope, self)),
|
|
children: vec![],
|
|
decl_id: None,
|
|
docs: self.docs_for_attrs(&field.attrs),
|
|
sig: sig::field_signature(field, self),
|
|
attributes: lower_attributes(field.attrs.clone(), self),
|
|
})
|
|
} else {
|
|
None
|
|
}
|
|
}
|
|
|
|
// FIXME would be nice to take a MethodItem here, but the ast provides both
|
|
// trait and impl flavours, so the caller must do the disassembly.
|
|
pub fn get_method_data(&self, id: ast::NodeId, ident: ast::Ident, span: Span) -> Option<Def> {
|
|
// The qualname for a method is the trait name or name of the struct in an impl in
|
|
// which the method is declared in, followed by the method's name.
|
|
let (qualname, parent_scope, decl_id, docs, attributes) = match self
|
|
.tcx
|
|
.impl_of_method(self.tcx.hir().local_def_id_from_node_id(id))
|
|
{
|
|
Some(impl_id) => match self.tcx.hir().get_if_local(impl_id) {
|
|
Some(Node::Item(item)) => match item.kind {
|
|
hir::ItemKind::Impl { ref self_ty, .. } => {
|
|
let mut qualname = String::from("<");
|
|
qualname.push_str(&self.tcx.hir().hir_to_pretty_string(self_ty.hir_id));
|
|
|
|
let trait_id = self.tcx.trait_id_of_impl(impl_id);
|
|
let mut docs = String::new();
|
|
let mut attrs = vec![];
|
|
let hir_id = self.tcx.hir().node_to_hir_id(id);
|
|
if let Some(Node::ImplItem(item)) = self.tcx.hir().find(hir_id) {
|
|
docs = self.docs_for_attrs(&item.attrs);
|
|
attrs = item.attrs.to_vec();
|
|
}
|
|
|
|
let mut decl_id = None;
|
|
if let Some(def_id) = trait_id {
|
|
// A method in a trait impl.
|
|
qualname.push_str(" as ");
|
|
qualname.push_str(&self.tcx.def_path_str(def_id));
|
|
|
|
decl_id = self
|
|
.tcx
|
|
.associated_items(def_id)
|
|
.filter_by_name_unhygienic(ident.name)
|
|
.next()
|
|
.map(|item| item.def_id);
|
|
}
|
|
qualname.push_str(">");
|
|
|
|
(qualname, trait_id, decl_id, docs, attrs)
|
|
}
|
|
_ => {
|
|
span_bug!(span, "Container {:?} for method {} not an impl?", impl_id, id);
|
|
}
|
|
},
|
|
r => {
|
|
span_bug!(
|
|
span,
|
|
"Container {:?} for method {} is not a node item {:?}",
|
|
impl_id,
|
|
id,
|
|
r
|
|
);
|
|
}
|
|
},
|
|
None => match self.tcx.trait_of_item(self.tcx.hir().local_def_id_from_node_id(id)) {
|
|
Some(def_id) => {
|
|
let mut docs = String::new();
|
|
let mut attrs = vec![];
|
|
let hir_id = self.tcx.hir().node_to_hir_id(id);
|
|
|
|
if let Some(Node::TraitItem(item)) = self.tcx.hir().find(hir_id) {
|
|
docs = self.docs_for_attrs(&item.attrs);
|
|
attrs = item.attrs.to_vec();
|
|
}
|
|
|
|
(
|
|
format!("::{}", self.tcx.def_path_str(def_id)),
|
|
Some(def_id),
|
|
None,
|
|
docs,
|
|
attrs,
|
|
)
|
|
}
|
|
None => {
|
|
debug!("could not find container for method {} at {:?}", id, span);
|
|
// This is not necessarily a bug, if there was a compilation error,
|
|
// the tables we need might not exist.
|
|
return None;
|
|
}
|
|
},
|
|
};
|
|
|
|
let qualname = format!("{}::{}", qualname, ident.name);
|
|
|
|
filter!(self.span_utils, ident.span);
|
|
|
|
Some(Def {
|
|
kind: DefKind::Method,
|
|
id: id_from_node_id(id, self),
|
|
span: self.span_from_span(ident.span),
|
|
name: ident.name.to_string(),
|
|
qualname,
|
|
// FIXME you get better data here by using the visitor.
|
|
value: String::new(),
|
|
parent: parent_scope.map(|id| id_from_def_id(id)),
|
|
children: vec![],
|
|
decl_id: decl_id.map(|id| id_from_def_id(id)),
|
|
docs,
|
|
sig: None,
|
|
attributes: lower_attributes(attributes, self),
|
|
})
|
|
}
|
|
|
|
pub fn get_trait_ref_data(&self, trait_ref: &ast::TraitRef) -> Option<Ref> {
|
|
self.lookup_def_id(trait_ref.ref_id).and_then(|def_id| {
|
|
let span = trait_ref.path.span;
|
|
if generated_code(span) {
|
|
return None;
|
|
}
|
|
let sub_span = trait_ref.path.segments.last().unwrap().ident.span;
|
|
filter!(self.span_utils, sub_span);
|
|
let span = self.span_from_span(sub_span);
|
|
Some(Ref { kind: RefKind::Type, span, ref_id: id_from_def_id(def_id) })
|
|
})
|
|
}
|
|
|
|
pub fn get_expr_data(&self, expr: &ast::Expr) -> Option<Data> {
|
|
let expr_hir_id = self.tcx.hir().node_to_hir_id(expr.id);
|
|
let hir_node = self.tcx.hir().expect_expr(expr_hir_id);
|
|
let ty = self.tables.expr_ty_adjusted_opt(&hir_node);
|
|
if ty.is_none() || ty.unwrap().kind == ty::Error {
|
|
return None;
|
|
}
|
|
match expr.kind {
|
|
ast::ExprKind::Field(ref sub_ex, ident) => {
|
|
let sub_ex_hir_id = self.tcx.hir().node_to_hir_id(sub_ex.id);
|
|
let hir_node = match self.tcx.hir().find(sub_ex_hir_id) {
|
|
Some(Node::Expr(expr)) => expr,
|
|
_ => {
|
|
debug!(
|
|
"Missing or weird node for sub-expression {} in {:?}",
|
|
sub_ex.id, expr
|
|
);
|
|
return None;
|
|
}
|
|
};
|
|
match self.tables.expr_ty_adjusted(&hir_node).kind {
|
|
ty::Adt(def, _) if !def.is_enum() => {
|
|
let variant = &def.non_enum_variant();
|
|
filter!(self.span_utils, ident.span);
|
|
let span = self.span_from_span(ident.span);
|
|
return Some(Data::RefData(Ref {
|
|
kind: RefKind::Variable,
|
|
span,
|
|
ref_id: self
|
|
.tcx
|
|
.find_field_index(ident, variant)
|
|
.map(|index| id_from_def_id(variant.fields[index].did))
|
|
.unwrap_or_else(|| null_id()),
|
|
}));
|
|
}
|
|
ty::Tuple(..) => None,
|
|
_ => {
|
|
debug!("expected struct or union type, found {:?}", ty);
|
|
None
|
|
}
|
|
}
|
|
}
|
|
ast::ExprKind::Struct(ref path, ..) => {
|
|
match self.tables.expr_ty_adjusted(&hir_node).kind {
|
|
ty::Adt(def, _) if !def.is_enum() => {
|
|
let sub_span = path.segments.last().unwrap().ident.span;
|
|
filter!(self.span_utils, sub_span);
|
|
let span = self.span_from_span(sub_span);
|
|
Some(Data::RefData(Ref {
|
|
kind: RefKind::Type,
|
|
span,
|
|
ref_id: id_from_def_id(def.did),
|
|
}))
|
|
}
|
|
_ => {
|
|
// FIXME ty could legitimately be an enum, but then we will fail
|
|
// later if we try to look up the fields.
|
|
debug!("expected struct or union, found {:?}", ty);
|
|
None
|
|
}
|
|
}
|
|
}
|
|
ast::ExprKind::MethodCall(ref seg, ..) => {
|
|
let expr_hir_id = self.tcx.hir().definitions().node_to_hir_id(expr.id);
|
|
let method_id = match self.tables.type_dependent_def_id(expr_hir_id) {
|
|
Some(id) => id,
|
|
None => {
|
|
debug!("could not resolve method id for {:?}", expr);
|
|
return None;
|
|
}
|
|
};
|
|
let (def_id, decl_id) = match self.tcx.associated_item(method_id).container {
|
|
ty::ImplContainer(_) => (Some(method_id), None),
|
|
ty::TraitContainer(_) => (None, Some(method_id)),
|
|
};
|
|
let sub_span = seg.ident.span;
|
|
filter!(self.span_utils, sub_span);
|
|
let span = self.span_from_span(sub_span);
|
|
Some(Data::RefData(Ref {
|
|
kind: RefKind::Function,
|
|
span,
|
|
ref_id: def_id
|
|
.or(decl_id)
|
|
.map(|id| id_from_def_id(id))
|
|
.unwrap_or_else(|| null_id()),
|
|
}))
|
|
}
|
|
ast::ExprKind::Path(_, ref path) => {
|
|
self.get_path_data(expr.id, path).map(|d| Data::RefData(d))
|
|
}
|
|
_ => {
|
|
// FIXME
|
|
bug!();
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn get_path_res(&self, id: NodeId) -> Res {
|
|
let hir_id = self.tcx.hir().node_to_hir_id(id);
|
|
match self.tcx.hir().get(hir_id) {
|
|
Node::TraitRef(tr) => tr.path.res,
|
|
|
|
Node::Item(&hir::Item { kind: hir::ItemKind::Use(path, _), .. }) => path.res,
|
|
Node::Visibility(&Spanned {
|
|
node: hir::VisibilityKind::Restricted { ref path, .. },
|
|
..
|
|
}) => path.res,
|
|
|
|
Node::PathSegment(seg) => match seg.res {
|
|
Some(res) if res != Res::Err => res,
|
|
_ => {
|
|
let parent_node = self.tcx.hir().get_parent_node(hir_id);
|
|
self.get_path_res(self.tcx.hir().hir_to_node_id(parent_node))
|
|
}
|
|
},
|
|
|
|
Node::Expr(&hir::Expr { kind: hir::ExprKind::Struct(ref qpath, ..), .. }) => {
|
|
self.tables.qpath_res(qpath, hir_id)
|
|
}
|
|
|
|
Node::Expr(&hir::Expr { kind: hir::ExprKind::Path(ref qpath), .. })
|
|
| Node::Pat(&hir::Pat { kind: hir::PatKind::Path(ref qpath), .. })
|
|
| Node::Pat(&hir::Pat { kind: hir::PatKind::Struct(ref qpath, ..), .. })
|
|
| Node::Pat(&hir::Pat { kind: hir::PatKind::TupleStruct(ref qpath, ..), .. })
|
|
| Node::Ty(&hir::Ty { kind: hir::TyKind::Path(ref qpath), .. }) => {
|
|
self.tables.qpath_res(qpath, hir_id)
|
|
}
|
|
|
|
Node::Binding(&hir::Pat {
|
|
kind: hir::PatKind::Binding(_, canonical_id, ..), ..
|
|
}) => Res::Local(canonical_id),
|
|
|
|
_ => Res::Err,
|
|
}
|
|
}
|
|
|
|
pub fn get_path_data(&self, id: NodeId, path: &ast::Path) -> Option<Ref> {
|
|
path.segments.last().and_then(|seg| {
|
|
self.get_path_segment_data(seg).or_else(|| self.get_path_segment_data_with_id(seg, id))
|
|
})
|
|
}
|
|
|
|
pub fn get_path_segment_data(&self, path_seg: &ast::PathSegment) -> Option<Ref> {
|
|
self.get_path_segment_data_with_id(path_seg, path_seg.id)
|
|
}
|
|
|
|
fn get_path_segment_data_with_id(
|
|
&self,
|
|
path_seg: &ast::PathSegment,
|
|
id: NodeId,
|
|
) -> Option<Ref> {
|
|
// Returns true if the path is function type sugar, e.g., `Fn(A) -> B`.
|
|
fn fn_type(seg: &ast::PathSegment) -> bool {
|
|
if let Some(ref generic_args) = seg.args {
|
|
if let ast::GenericArgs::Parenthesized(_) = **generic_args {
|
|
return true;
|
|
}
|
|
}
|
|
false
|
|
}
|
|
|
|
if id == DUMMY_NODE_ID {
|
|
return None;
|
|
}
|
|
|
|
let res = self.get_path_res(id);
|
|
let span = path_seg.ident.span;
|
|
filter!(self.span_utils, span);
|
|
let span = self.span_from_span(span);
|
|
|
|
match res {
|
|
Res::Local(id) => Some(Ref {
|
|
kind: RefKind::Variable,
|
|
span,
|
|
ref_id: id_from_node_id(self.tcx.hir().hir_to_node_id(id), self),
|
|
}),
|
|
Res::Def(HirDefKind::Trait, def_id) if fn_type(path_seg) => {
|
|
Some(Ref { kind: RefKind::Type, span, ref_id: id_from_def_id(def_id) })
|
|
}
|
|
Res::Def(HirDefKind::Struct, def_id)
|
|
| Res::Def(HirDefKind::Variant, def_id)
|
|
| Res::Def(HirDefKind::Union, def_id)
|
|
| Res::Def(HirDefKind::Enum, def_id)
|
|
| Res::Def(HirDefKind::TyAlias, def_id)
|
|
| Res::Def(HirDefKind::ForeignTy, def_id)
|
|
| Res::Def(HirDefKind::TraitAlias, def_id)
|
|
| Res::Def(HirDefKind::AssocOpaqueTy, def_id)
|
|
| Res::Def(HirDefKind::AssocTy, def_id)
|
|
| Res::Def(HirDefKind::Trait, def_id)
|
|
| Res::Def(HirDefKind::OpaqueTy, def_id)
|
|
| Res::Def(HirDefKind::TyParam, def_id) => {
|
|
Some(Ref { kind: RefKind::Type, span, ref_id: id_from_def_id(def_id) })
|
|
}
|
|
Res::Def(HirDefKind::ConstParam, def_id) => {
|
|
Some(Ref { kind: RefKind::Variable, span, ref_id: id_from_def_id(def_id) })
|
|
}
|
|
Res::Def(HirDefKind::Ctor(CtorOf::Struct, ..), def_id) => {
|
|
// This is a reference to a tuple struct where the def_id points
|
|
// to an invisible constructor function. That is not a very useful
|
|
// def, so adjust to point to the tuple struct itself.
|
|
let parent_def_id = self.tcx.parent(def_id).unwrap();
|
|
Some(Ref { kind: RefKind::Type, span, ref_id: id_from_def_id(parent_def_id) })
|
|
}
|
|
Res::Def(HirDefKind::Static, _)
|
|
| Res::Def(HirDefKind::Const, _)
|
|
| Res::Def(HirDefKind::AssocConst, _)
|
|
| Res::Def(HirDefKind::Ctor(..), _) => {
|
|
Some(Ref { kind: RefKind::Variable, span, ref_id: id_from_def_id(res.def_id()) })
|
|
}
|
|
Res::Def(HirDefKind::AssocFn, decl_id) => {
|
|
let def_id = if decl_id.is_local() {
|
|
let ti = self.tcx.associated_item(decl_id);
|
|
|
|
self.tcx
|
|
.associated_items(ti.container.id())
|
|
.filter_by_name_unhygienic(ti.ident.name)
|
|
.find(|item| item.defaultness.has_value())
|
|
.map(|item| item.def_id)
|
|
} else {
|
|
None
|
|
};
|
|
Some(Ref {
|
|
kind: RefKind::Function,
|
|
span,
|
|
ref_id: id_from_def_id(def_id.unwrap_or(decl_id)),
|
|
})
|
|
}
|
|
Res::Def(HirDefKind::Fn, def_id) => {
|
|
Some(Ref { kind: RefKind::Function, span, ref_id: id_from_def_id(def_id) })
|
|
}
|
|
Res::Def(HirDefKind::Mod, def_id) => {
|
|
Some(Ref { kind: RefKind::Mod, span, ref_id: id_from_def_id(def_id) })
|
|
}
|
|
Res::PrimTy(..)
|
|
| Res::SelfTy(..)
|
|
| Res::Def(HirDefKind::Macro(..), _)
|
|
| Res::ToolMod
|
|
| Res::NonMacroAttr(..)
|
|
| Res::SelfCtor(..)
|
|
| Res::Err => None,
|
|
}
|
|
}
|
|
|
|
pub fn get_field_ref_data(
|
|
&self,
|
|
field_ref: &ast::Field,
|
|
variant: &ty::VariantDef,
|
|
) -> Option<Ref> {
|
|
filter!(self.span_utils, field_ref.ident.span);
|
|
self.tcx.find_field_index(field_ref.ident, variant).map(|index| {
|
|
let span = self.span_from_span(field_ref.ident.span);
|
|
Ref { kind: RefKind::Variable, span, ref_id: id_from_def_id(variant.fields[index].did) }
|
|
})
|
|
}
|
|
|
|
/// Attempt to return MacroRef for any AST node.
|
|
///
|
|
/// For a given piece of AST defined by the supplied Span and NodeId,
|
|
/// returns `None` if the node is not macro-generated or the span is malformed,
|
|
/// else uses the expansion callsite and callee to return some MacroRef.
|
|
pub fn get_macro_use_data(&self, span: Span) -> Option<MacroRef> {
|
|
if !generated_code(span) {
|
|
return None;
|
|
}
|
|
// Note we take care to use the source callsite/callee, to handle
|
|
// nested expansions and ensure we only generate data for source-visible
|
|
// macro uses.
|
|
let callsite = span.source_callsite();
|
|
let callsite_span = self.span_from_span(callsite);
|
|
let callee = span.source_callee()?;
|
|
|
|
let mac_name = match callee.kind {
|
|
ExpnKind::Macro(mac_kind, name) => match mac_kind {
|
|
MacroKind::Bang => name,
|
|
|
|
// Ignore attribute macros, their spans are usually mangled
|
|
// FIXME(eddyb) is this really the case anymore?
|
|
MacroKind::Attr | MacroKind::Derive => return None,
|
|
},
|
|
|
|
// These are not macros.
|
|
// FIXME(eddyb) maybe there is a way to handle them usefully?
|
|
ExpnKind::Root | ExpnKind::AstPass(_) | ExpnKind::Desugaring(_) => return None,
|
|
};
|
|
|
|
let callee_span = self.span_from_span(callee.def_site);
|
|
Some(MacroRef {
|
|
span: callsite_span,
|
|
qualname: mac_name.to_string(), // FIXME: generate the real qualname
|
|
callee_span,
|
|
})
|
|
}
|
|
|
|
fn lookup_def_id(&self, ref_id: NodeId) -> Option<DefId> {
|
|
match self.get_path_res(ref_id) {
|
|
Res::PrimTy(_) | Res::SelfTy(..) | Res::Err => None,
|
|
def => def.opt_def_id(),
|
|
}
|
|
}
|
|
|
|
fn docs_for_attrs(&self, attrs: &[Attribute]) -> String {
|
|
let mut result = String::new();
|
|
|
|
for attr in attrs {
|
|
if let Some(val) = attr.doc_str() {
|
|
if attr.is_doc_comment() {
|
|
result.push_str(&strip_doc_comment_decoration(&val.as_str()));
|
|
} else {
|
|
result.push_str(&val.as_str());
|
|
}
|
|
result.push('\n');
|
|
} else if attr.check_name(sym::doc) {
|
|
if let Some(meta_list) = attr.meta_item_list() {
|
|
meta_list
|
|
.into_iter()
|
|
.filter(|it| it.check_name(sym::include))
|
|
.filter_map(|it| it.meta_item_list().map(|l| l.to_owned()))
|
|
.flat_map(|it| it)
|
|
.filter(|meta| meta.check_name(sym::contents))
|
|
.filter_map(|meta| meta.value_str())
|
|
.for_each(|val| {
|
|
result.push_str(&val.as_str());
|
|
result.push('\n');
|
|
});
|
|
}
|
|
}
|
|
}
|
|
|
|
if !self.config.full_docs {
|
|
if let Some(index) = result.find("\n\n") {
|
|
result.truncate(index);
|
|
}
|
|
}
|
|
|
|
result
|
|
}
|
|
|
|
fn next_impl_id(&self) -> u32 {
|
|
let next = self.impl_counter.get();
|
|
self.impl_counter.set(next + 1);
|
|
next
|
|
}
|
|
}
|
|
|
|
fn make_signature(decl: &ast::FnDecl, generics: &ast::Generics) -> String {
|
|
let mut sig = "fn ".to_owned();
|
|
if !generics.params.is_empty() {
|
|
sig.push('<');
|
|
sig.push_str(
|
|
&generics
|
|
.params
|
|
.iter()
|
|
.map(|param| param.ident.to_string())
|
|
.collect::<Vec<_>>()
|
|
.join(", "),
|
|
);
|
|
sig.push_str("> ");
|
|
}
|
|
sig.push('(');
|
|
sig.push_str(&decl.inputs.iter().map(param_to_string).collect::<Vec<_>>().join(", "));
|
|
sig.push(')');
|
|
match decl.output {
|
|
ast::FnRetTy::Default(_) => sig.push_str(" -> ()"),
|
|
ast::FnRetTy::Ty(ref t) => sig.push_str(&format!(" -> {}", ty_to_string(t))),
|
|
}
|
|
|
|
sig
|
|
}
|
|
|
|
// An AST visitor for collecting paths (e.g., the names of structs) and formal
|
|
// variables (idents) from patterns.
|
|
struct PathCollector<'l> {
|
|
collected_paths: Vec<(NodeId, &'l ast::Path)>,
|
|
collected_idents: Vec<(NodeId, ast::Ident, ast::Mutability)>,
|
|
}
|
|
|
|
impl<'l> PathCollector<'l> {
|
|
fn new() -> PathCollector<'l> {
|
|
PathCollector { collected_paths: vec![], collected_idents: vec![] }
|
|
}
|
|
}
|
|
|
|
impl<'l> Visitor<'l> for PathCollector<'l> {
|
|
fn visit_pat(&mut self, p: &'l ast::Pat) {
|
|
match p.kind {
|
|
PatKind::Struct(ref path, ..) => {
|
|
self.collected_paths.push((p.id, path));
|
|
}
|
|
PatKind::TupleStruct(ref path, ..) | PatKind::Path(_, ref path) => {
|
|
self.collected_paths.push((p.id, path));
|
|
}
|
|
PatKind::Ident(bm, ident, _) => {
|
|
debug!(
|
|
"PathCollector, visit ident in pat {}: {:?} {:?}",
|
|
ident, p.span, ident.span
|
|
);
|
|
let immut = match bm {
|
|
// Even if the ref is mut, you can't change the ref, only
|
|
// the data pointed at, so showing the initialising expression
|
|
// is still worthwhile.
|
|
ast::BindingMode::ByRef(_) => ast::Mutability::Not,
|
|
ast::BindingMode::ByValue(mt) => mt,
|
|
};
|
|
self.collected_idents.push((p.id, ident, immut));
|
|
}
|
|
_ => {}
|
|
}
|
|
visit::walk_pat(self, p);
|
|
}
|
|
}
|
|
|
|
/// Defines what to do with the results of saving the analysis.
|
|
pub trait SaveHandler {
|
|
fn save(&mut self, save_ctxt: &SaveContext<'_, '_>, analysis: &Analysis);
|
|
}
|
|
|
|
/// Dump the save-analysis results to a file.
|
|
pub struct DumpHandler<'a> {
|
|
odir: Option<&'a Path>,
|
|
cratename: String,
|
|
}
|
|
|
|
impl<'a> DumpHandler<'a> {
|
|
pub fn new(odir: Option<&'a Path>, cratename: &str) -> DumpHandler<'a> {
|
|
DumpHandler { odir, cratename: cratename.to_owned() }
|
|
}
|
|
|
|
fn output_file(&self, ctx: &SaveContext<'_, '_>) -> (BufWriter<File>, PathBuf) {
|
|
let sess = &ctx.tcx.sess;
|
|
let file_name = match ctx.config.output_file {
|
|
Some(ref s) => PathBuf::from(s),
|
|
None => {
|
|
let mut root_path = match self.odir {
|
|
Some(val) => val.join("save-analysis"),
|
|
None => PathBuf::from("save-analysis-temp"),
|
|
};
|
|
|
|
if let Err(e) = std::fs::create_dir_all(&root_path) {
|
|
error!("Could not create directory {}: {}", root_path.display(), e);
|
|
}
|
|
|
|
let executable =
|
|
sess.crate_types.borrow().iter().any(|ct| *ct == CrateType::Executable);
|
|
let mut out_name = if executable { String::new() } else { "lib".to_owned() };
|
|
out_name.push_str(&self.cratename);
|
|
out_name.push_str(&sess.opts.cg.extra_filename);
|
|
out_name.push_str(".json");
|
|
root_path.push(&out_name);
|
|
|
|
root_path
|
|
}
|
|
};
|
|
|
|
info!("Writing output to {}", file_name.display());
|
|
|
|
let output_file = BufWriter::new(File::create(&file_name).unwrap_or_else(|e| {
|
|
sess.fatal(&format!("Could not open {}: {}", file_name.display(), e))
|
|
}));
|
|
|
|
(output_file, file_name)
|
|
}
|
|
}
|
|
|
|
impl SaveHandler for DumpHandler<'_> {
|
|
fn save(&mut self, save_ctxt: &SaveContext<'_, '_>, analysis: &Analysis) {
|
|
let sess = &save_ctxt.tcx.sess;
|
|
let (output, file_name) = self.output_file(&save_ctxt);
|
|
if let Err(e) = serde_json::to_writer(output, &analysis) {
|
|
error!("Can't serialize save-analysis: {:?}", e);
|
|
}
|
|
|
|
if sess.opts.json_artifact_notifications {
|
|
sess.parse_sess.span_diagnostic.emit_artifact_notification(&file_name, "save-analysis");
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Call a callback with the results of save-analysis.
|
|
pub struct CallbackHandler<'b> {
|
|
pub callback: &'b mut dyn FnMut(&rls_data::Analysis),
|
|
}
|
|
|
|
impl SaveHandler for CallbackHandler<'_> {
|
|
fn save(&mut self, _: &SaveContext<'_, '_>, analysis: &Analysis) {
|
|
(self.callback)(analysis)
|
|
}
|
|
}
|
|
|
|
pub fn process_crate<'l, 'tcx, H: SaveHandler>(
|
|
tcx: TyCtxt<'tcx>,
|
|
krate: &ast::Crate,
|
|
cratename: &str,
|
|
input: &'l Input,
|
|
config: Option<Config>,
|
|
mut handler: H,
|
|
) {
|
|
tcx.dep_graph.with_ignore(|| {
|
|
info!("Dumping crate {}", cratename);
|
|
|
|
// Privacy checking requires and is done after type checking; use a
|
|
// fallback in case the access levels couldn't have been correctly computed.
|
|
let access_levels = match tcx.sess.compile_status() {
|
|
Ok(..) => tcx.privacy_access_levels(LOCAL_CRATE),
|
|
Err(..) => tcx.arena.alloc(AccessLevels::default()),
|
|
};
|
|
|
|
let save_ctxt = SaveContext {
|
|
tcx,
|
|
tables: &ty::TypeckTables::empty(None),
|
|
empty_tables: &ty::TypeckTables::empty(None),
|
|
access_levels: &access_levels,
|
|
span_utils: SpanUtils::new(&tcx.sess),
|
|
config: find_config(config),
|
|
impl_counter: Cell::new(0),
|
|
};
|
|
|
|
let mut visitor = DumpVisitor::new(save_ctxt);
|
|
|
|
visitor.dump_crate_info(cratename, krate);
|
|
visitor.dump_compilation_options(input, cratename);
|
|
visit::walk_crate(&mut visitor, krate);
|
|
|
|
handler.save(&visitor.save_ctxt, &visitor.analysis())
|
|
})
|
|
}
|
|
|
|
fn find_config(supplied: Option<Config>) -> Config {
|
|
if let Some(config) = supplied {
|
|
return config;
|
|
}
|
|
|
|
match env::var_os("RUST_SAVE_ANALYSIS_CONFIG") {
|
|
None => Config::default(),
|
|
Some(config) => config
|
|
.to_str()
|
|
.ok_or(())
|
|
.map_err(|_| error!("`RUST_SAVE_ANALYSIS_CONFIG` isn't UTF-8"))
|
|
.and_then(|cfg| {
|
|
serde_json::from_str(cfg)
|
|
.map_err(|_| error!("Could not deserialize save-analysis config"))
|
|
})
|
|
.unwrap_or_default(),
|
|
}
|
|
}
|
|
|
|
// Utility functions for the module.
|
|
|
|
// Helper function to escape quotes in a string
|
|
fn escape(s: String) -> String {
|
|
s.replace("\"", "\"\"")
|
|
}
|
|
|
|
// Helper function to determine if a span came from a
|
|
// macro expansion or syntax extension.
|
|
fn generated_code(span: Span) -> bool {
|
|
span.from_expansion() || span.is_dummy()
|
|
}
|
|
|
|
// DefId::index is a newtype and so the JSON serialisation is ugly. Therefore
|
|
// we use our own Id which is the same, but without the newtype.
|
|
fn id_from_def_id(id: DefId) -> rls_data::Id {
|
|
rls_data::Id { krate: id.krate.as_u32(), index: id.index.as_u32() }
|
|
}
|
|
|
|
fn id_from_node_id(id: NodeId, scx: &SaveContext<'_, '_>) -> rls_data::Id {
|
|
let def_id = scx.tcx.hir().opt_local_def_id_from_node_id(id);
|
|
def_id.map(|id| id_from_def_id(id)).unwrap_or_else(|| {
|
|
// Create a *fake* `DefId` out of a `NodeId` by subtracting the `NodeId`
|
|
// out of the maximum u32 value. This will work unless you have *billions*
|
|
// of definitions in a single crate (very unlikely to actually happen).
|
|
rls_data::Id { krate: LOCAL_CRATE.as_u32(), index: !id.as_u32() }
|
|
})
|
|
}
|
|
|
|
fn null_id() -> rls_data::Id {
|
|
rls_data::Id { krate: u32::max_value(), index: u32::max_value() }
|
|
}
|
|
|
|
fn lower_attributes(attrs: Vec<Attribute>, scx: &SaveContext<'_, '_>) -> Vec<rls_data::Attribute> {
|
|
attrs
|
|
.into_iter()
|
|
// Only retain real attributes. Doc comments are lowered separately.
|
|
.filter(|attr| !attr.has_name(sym::doc))
|
|
.map(|mut attr| {
|
|
// Remove the surrounding '#[..]' or '#![..]' of the pretty printed
|
|
// attribute. First normalize all inner attribute (#![..]) to outer
|
|
// ones (#[..]), then remove the two leading and the one trailing character.
|
|
attr.style = ast::AttrStyle::Outer;
|
|
let value = pprust::attribute_to_string(&attr);
|
|
// This str slicing works correctly, because the leading and trailing characters
|
|
// are in the ASCII range and thus exactly one byte each.
|
|
let value = value[2..value.len() - 1].to_string();
|
|
|
|
rls_data::Attribute { value, span: scx.span_from_span(attr.span) }
|
|
})
|
|
.collect()
|
|
}
|