```
"##,
-// This shouldn't really ever trigger since the repeated value error comes first
-E0136: r##"
-A binary can only have one entry point, and by default that entry point is the
-function `main()`. If there are multiple such functions, please rename one.
-"##,
-
-E0137: r##"
-More than one function was declared with the `#[main]` attribute.
-
-Erroneous code example:
-
-```compile_fail,E0137
-#![feature(main)]
-
-#[main]
-fn foo() {}
-
-#[main]
-fn f() {} // error: multiple functions with a `#[main]` attribute
-```
-
-This error indicates that the compiler found multiple functions with the
-`#[main]` attribute. This is an error because there must be a unique entry
-point into a Rust program. Example:
-
-```
-#![feature(main)]
-
-#[main]
-fn f() {} // ok!
-```
-"##,
-
-E0138: r##"
-More than one function was declared with the `#[start]` attribute.
-
-Erroneous code example:
-
-```compile_fail,E0138
-#![feature(start)]
-
-#[start]
-fn foo(argc: isize, argv: *const *const u8) -> isize {}
-
-#[start]
-fn f(argc: isize, argv: *const *const u8) -> isize {}
-// error: multiple 'start' functions
-```
-
-This error indicates that the compiler found multiple functions with the
-`#[start]` attribute. This is an error because there must be a unique entry
-point into a Rust program. Example:
-
-```
-#![feature(start)]
-
-#[start]
-fn foo(argc: isize, argv: *const *const u8) -> isize { 0 } // ok!
-```
-"##,
E0139: r##"
#### Note: this error code is no longer emitted by the compiler.
```
"##,
-E0601: r##"
-No `main` function was found in a binary crate. To fix this error, add a
-`main` function. For example:
-
-```
-fn main() {
- // Your program will start here.
- println!("Hello world!");
-}
-```
-
-If you don't know the basics of Rust, you can go look to the Rust Book to get
-started: https://doc.rust-lang.org/book/
-"##,
-
E0602: r##"
An unknown lint was used on the command line.
pub mod cstore;
pub mod dependency_format;
pub mod diagnostic_items;
- pub mod entry;
pub mod exported_symbols;
pub mod free_region;
pub mod intrinsicck;
+++ /dev/null
-use crate::hir::map as hir_map;
-use crate::hir::def_id::{CrateNum, CRATE_DEF_INDEX, DefId, LOCAL_CRATE};
-use crate::session::{config, Session};
-use crate::session::config::EntryFnType;
-use syntax::attr;
-use syntax::entry::EntryPointType;
-use syntax::symbol::sym;
-use syntax_pos::Span;
-use crate::hir::{HirId, Item, ItemKind, ImplItem, TraitItem};
-use crate::hir::itemlikevisit::ItemLikeVisitor;
-use crate::ty::TyCtxt;
-use crate::ty::query::Providers;
-
-struct EntryContext<'a, 'tcx> {
- session: &'a Session,
-
- map: &'a hir_map::Map<'tcx>,
-
- /// The top-level function called `main`.
- main_fn: Option<(HirId, Span)>,
-
- /// The function that has attribute named `main`.
- attr_main_fn: Option<(HirId, Span)>,
-
- /// The function that has the attribute 'start' on it.
- start_fn: Option<(HirId, Span)>,
-
- /// The functions that one might think are `main` but aren't, e.g.
- /// main functions not defined at the top level. For diagnostics.
- non_main_fns: Vec<(HirId, Span)> ,
-}
-
-impl<'a, 'tcx> ItemLikeVisitor<'tcx> for EntryContext<'a, 'tcx> {
- fn visit_item(&mut self, item: &'tcx Item) {
- let def_id = self.map.local_def_id(item.hir_id);
- let def_key = self.map.def_key(def_id);
- let at_root = def_key.parent == Some(CRATE_DEF_INDEX);
- find_item(item, self, at_root);
- }
-
- fn visit_trait_item(&mut self, _trait_item: &'tcx TraitItem) {
- // Entry fn is never a trait item.
- }
-
- fn visit_impl_item(&mut self, _impl_item: &'tcx ImplItem) {
- // Entry fn is never a trait item.
- }
-}
-
-fn entry_fn(tcx: TyCtxt<'_>, cnum: CrateNum) -> Option<(DefId, EntryFnType)> {
- assert_eq!(cnum, LOCAL_CRATE);
-
- let any_exe = tcx.sess.crate_types.borrow().iter().any(|ty| {
- *ty == config::CrateType::Executable
- });
- if !any_exe {
- // No need to find a main function.
- return None;
- }
-
- // If the user wants no main function at all, then stop here.
- if attr::contains_name(&tcx.hir().krate().attrs, sym::no_main) {
- return None;
- }
-
- let mut ctxt = EntryContext {
- session: tcx.sess,
- map: tcx.hir(),
- main_fn: None,
- attr_main_fn: None,
- start_fn: None,
- non_main_fns: Vec::new(),
- };
-
- tcx.hir().krate().visit_all_item_likes(&mut ctxt);
-
- configure_main(tcx, &ctxt)
-}
-
-// Beware, this is duplicated in `libsyntax/entry.rs`, so make sure to keep
-// them in sync.
-fn entry_point_type(item: &Item, at_root: bool) -> EntryPointType {
- match item.kind {
- ItemKind::Fn(..) => {
- if attr::contains_name(&item.attrs, sym::start) {
- EntryPointType::Start
- } else if attr::contains_name(&item.attrs, sym::main) {
- EntryPointType::MainAttr
- } else if item.ident.name == sym::main {
- if at_root {
- // This is a top-level function so can be `main`.
- EntryPointType::MainNamed
- } else {
- EntryPointType::OtherMain
- }
- } else {
- EntryPointType::None
- }
- }
- _ => EntryPointType::None,
- }
-}
-
-
-fn find_item(item: &Item, ctxt: &mut EntryContext<'_, '_>, at_root: bool) {
- match entry_point_type(item, at_root) {
- EntryPointType::MainNamed => {
- if ctxt.main_fn.is_none() {
- ctxt.main_fn = Some((item.hir_id, item.span));
- } else {
- span_err!(ctxt.session, item.span, E0136,
- "multiple `main` functions");
- }
- },
- EntryPointType::OtherMain => {
- ctxt.non_main_fns.push((item.hir_id, item.span));
- },
- EntryPointType::MainAttr => {
- if ctxt.attr_main_fn.is_none() {
- ctxt.attr_main_fn = Some((item.hir_id, item.span));
- } else {
- struct_span_err!(ctxt.session, item.span, E0137,
- "multiple functions with a `#[main]` attribute")
- .span_label(item.span, "additional `#[main]` function")
- .span_label(ctxt.attr_main_fn.unwrap().1, "first `#[main]` function")
- .emit();
- }
- },
- EntryPointType::Start => {
- if ctxt.start_fn.is_none() {
- ctxt.start_fn = Some((item.hir_id, item.span));
- } else {
- struct_span_err!(ctxt.session, item.span, E0138, "multiple `start` functions")
- .span_label(ctxt.start_fn.unwrap().1, "previous `start` function here")
- .span_label(item.span, "multiple `start` functions")
- .emit();
- }
- }
- EntryPointType::None => (),
- }
-}
-
-fn configure_main(tcx: TyCtxt<'_>, visitor: &EntryContext<'_, '_>) -> Option<(DefId, EntryFnType)> {
- if let Some((hir_id, _)) = visitor.start_fn {
- Some((tcx.hir().local_def_id(hir_id), EntryFnType::Start))
- } else if let Some((hir_id, _)) = visitor.attr_main_fn {
- Some((tcx.hir().local_def_id(hir_id), EntryFnType::Main))
- } else if let Some((hir_id, _)) = visitor.main_fn {
- Some((tcx.hir().local_def_id(hir_id), EntryFnType::Main))
- } else {
- no_main_err(tcx, visitor);
- None
- }
-}
-
-fn no_main_err(tcx: TyCtxt<'_>, visitor: &EntryContext<'_, '_>) {
- // There is no main function.
- let mut err = struct_err!(tcx.sess, E0601,
- "`main` function not found in crate `{}`", tcx.crate_name(LOCAL_CRATE));
- let filename = &tcx.sess.local_crate_source_file;
- let note = if !visitor.non_main_fns.is_empty() {
- for &(_, span) in &visitor.non_main_fns {
- err.span_note(span, "here is a function named `main`");
- }
- err.note("you have one or more functions named `main` not defined at the crate level");
- err.help("either move the `main` function definitions or attach the `#[main]` attribute \
- to one of them");
- // There were some functions named `main` though. Try to give the user a hint.
- format!("the main function must be defined at the crate level{}",
- filename.as_ref().map(|f| format!(" (in `{}`)", f.display())).unwrap_or_default())
- } else if let Some(filename) = filename {
- format!("consider adding a `main` function to `{}`", filename.display())
- } else {
- String::from("consider adding a `main` function at the crate level")
- };
- let sp = tcx.hir().krate().span;
- // The file may be empty, which leads to the diagnostic machinery not emitting this
- // note. This is a relatively simple way to detect that case and emit a span-less
- // note instead.
- if let Ok(_) = tcx.sess.source_map().lookup_line(sp.lo()) {
- err.set_span(sp);
- err.span_label(sp, ¬e);
- } else {
- err.note(¬e);
- }
- if tcx.sess.teach(&err.get_code().unwrap()) {
- err.note("If you don't know the basics of Rust, you can go look to the Rust Book \
- to get started: https://doc.rust-lang.org/book/");
- }
- err.emit();
-}
-
-pub fn find_entry_point(tcx: TyCtxt<'_>) -> Option<(DefId, EntryFnType)> {
- tcx.entry_fn(LOCAL_CRATE)
-}
-
-pub fn provide(providers: &mut Providers<'_>) {
- *providers = Providers {
- entry_fn,
- ..*providers
- };
-}
rustc_passes::provide(providers);
rustc_traits::provide(providers);
middle::region::provide(providers);
- middle::entry::provide(providers);
cstore::provide(providers);
lint::provide(providers);
rustc_lint::provide(providers);
time(sess, "misc checking 1", || {
parallel!({
entry_point = time(sess, "looking for entry point", || {
- middle::entry::find_entry_point(tcx)
+ rustc_passes::entry::find_entry_point(tcx)
});
time(sess, "looking for plugin registrar", || {
--- /dev/null
+use rustc::hir::map as hir_map;
+use rustc::hir::def_id::{CrateNum, CRATE_DEF_INDEX, DefId, LOCAL_CRATE};
+use rustc::session::{config, Session};
+use rustc::session::config::EntryFnType;
+use syntax::attr;
+use syntax::entry::EntryPointType;
+use syntax::symbol::sym;
+use syntax_pos::Span;
+use rustc::hir::{HirId, Item, ItemKind, ImplItem, TraitItem};
+use rustc::hir::itemlikevisit::ItemLikeVisitor;
+use rustc::ty::TyCtxt;
+use rustc::ty::query::Providers;
+
+struct EntryContext<'a, 'tcx> {
+ session: &'a Session,
+
+ map: &'a hir_map::Map<'tcx>,
+
+ /// The top-level function called `main`.
+ main_fn: Option<(HirId, Span)>,
+
+ /// The function that has attribute named `main`.
+ attr_main_fn: Option<(HirId, Span)>,
+
+ /// The function that has the attribute 'start' on it.
+ start_fn: Option<(HirId, Span)>,
+
+ /// The functions that one might think are `main` but aren't, e.g.
+ /// main functions not defined at the top level. For diagnostics.
+ non_main_fns: Vec<(HirId, Span)> ,
+}
+
+impl<'a, 'tcx> ItemLikeVisitor<'tcx> for EntryContext<'a, 'tcx> {
+ fn visit_item(&mut self, item: &'tcx Item) {
+ let def_id = self.map.local_def_id(item.hir_id);
+ let def_key = self.map.def_key(def_id);
+ let at_root = def_key.parent == Some(CRATE_DEF_INDEX);
+ find_item(item, self, at_root);
+ }
+
+ fn visit_trait_item(&mut self, _trait_item: &'tcx TraitItem) {
+ // Entry fn is never a trait item.
+ }
+
+ fn visit_impl_item(&mut self, _impl_item: &'tcx ImplItem) {
+ // Entry fn is never a trait item.
+ }
+}
+
+fn entry_fn(tcx: TyCtxt<'_>, cnum: CrateNum) -> Option<(DefId, EntryFnType)> {
+ assert_eq!(cnum, LOCAL_CRATE);
+
+ let any_exe = tcx.sess.crate_types.borrow().iter().any(|ty| {
+ *ty == config::CrateType::Executable
+ });
+ if !any_exe {
+ // No need to find a main function.
+ return None;
+ }
+
+ // If the user wants no main function at all, then stop here.
+ if attr::contains_name(&tcx.hir().krate().attrs, sym::no_main) {
+ return None;
+ }
+
+ let mut ctxt = EntryContext {
+ session: tcx.sess,
+ map: tcx.hir(),
+ main_fn: None,
+ attr_main_fn: None,
+ start_fn: None,
+ non_main_fns: Vec::new(),
+ };
+
+ tcx.hir().krate().visit_all_item_likes(&mut ctxt);
+
+ configure_main(tcx, &ctxt)
+}
+
+// Beware, this is duplicated in `libsyntax/entry.rs`, so make sure to keep
+// them in sync.
+fn entry_point_type(item: &Item, at_root: bool) -> EntryPointType {
+ match item.kind {
+ ItemKind::Fn(..) => {
+ if attr::contains_name(&item.attrs, sym::start) {
+ EntryPointType::Start
+ } else if attr::contains_name(&item.attrs, sym::main) {
+ EntryPointType::MainAttr
+ } else if item.ident.name == sym::main {
+ if at_root {
+ // This is a top-level function so can be `main`.
+ EntryPointType::MainNamed
+ } else {
+ EntryPointType::OtherMain
+ }
+ } else {
+ EntryPointType::None
+ }
+ }
+ _ => EntryPointType::None,
+ }
+}
+
+
+fn find_item(item: &Item, ctxt: &mut EntryContext<'_, '_>, at_root: bool) {
+ match entry_point_type(item, at_root) {
+ EntryPointType::MainNamed => {
+ if ctxt.main_fn.is_none() {
+ ctxt.main_fn = Some((item.hir_id, item.span));
+ } else {
+ span_err!(ctxt.session, item.span, E0136,
+ "multiple `main` functions");
+ }
+ },
+ EntryPointType::OtherMain => {
+ ctxt.non_main_fns.push((item.hir_id, item.span));
+ },
+ EntryPointType::MainAttr => {
+ if ctxt.attr_main_fn.is_none() {
+ ctxt.attr_main_fn = Some((item.hir_id, item.span));
+ } else {
+ struct_span_err!(ctxt.session, item.span, E0137,
+ "multiple functions with a `#[main]` attribute")
+ .span_label(item.span, "additional `#[main]` function")
+ .span_label(ctxt.attr_main_fn.unwrap().1, "first `#[main]` function")
+ .emit();
+ }
+ },
+ EntryPointType::Start => {
+ if ctxt.start_fn.is_none() {
+ ctxt.start_fn = Some((item.hir_id, item.span));
+ } else {
+ struct_span_err!(ctxt.session, item.span, E0138, "multiple `start` functions")
+ .span_label(ctxt.start_fn.unwrap().1, "previous `start` function here")
+ .span_label(item.span, "multiple `start` functions")
+ .emit();
+ }
+ }
+ EntryPointType::None => (),
+ }
+}
+
+fn configure_main(tcx: TyCtxt<'_>, visitor: &EntryContext<'_, '_>) -> Option<(DefId, EntryFnType)> {
+ if let Some((hir_id, _)) = visitor.start_fn {
+ Some((tcx.hir().local_def_id(hir_id), EntryFnType::Start))
+ } else if let Some((hir_id, _)) = visitor.attr_main_fn {
+ Some((tcx.hir().local_def_id(hir_id), EntryFnType::Main))
+ } else if let Some((hir_id, _)) = visitor.main_fn {
+ Some((tcx.hir().local_def_id(hir_id), EntryFnType::Main))
+ } else {
+ no_main_err(tcx, visitor);
+ None
+ }
+}
+
+fn no_main_err(tcx: TyCtxt<'_>, visitor: &EntryContext<'_, '_>) {
+ // There is no main function.
+ let mut err = struct_err!(tcx.sess, E0601,
+ "`main` function not found in crate `{}`", tcx.crate_name(LOCAL_CRATE));
+ let filename = &tcx.sess.local_crate_source_file;
+ let note = if !visitor.non_main_fns.is_empty() {
+ for &(_, span) in &visitor.non_main_fns {
+ err.span_note(span, "here is a function named `main`");
+ }
+ err.note("you have one or more functions named `main` not defined at the crate level");
+ err.help("either move the `main` function definitions or attach the `#[main]` attribute \
+ to one of them");
+ // There were some functions named `main` though. Try to give the user a hint.
+ format!("the main function must be defined at the crate level{}",
+ filename.as_ref().map(|f| format!(" (in `{}`)", f.display())).unwrap_or_default())
+ } else if let Some(filename) = filename {
+ format!("consider adding a `main` function to `{}`", filename.display())
+ } else {
+ String::from("consider adding a `main` function at the crate level")
+ };
+ let sp = tcx.hir().krate().span;
+ // The file may be empty, which leads to the diagnostic machinery not emitting this
+ // note. This is a relatively simple way to detect that case and emit a span-less
+ // note instead.
+ if let Ok(_) = tcx.sess.source_map().lookup_line(sp.lo()) {
+ err.set_span(sp);
+ err.span_label(sp, ¬e);
+ } else {
+ err.note(¬e);
+ }
+ if tcx.sess.teach(&err.get_code().unwrap()) {
+ err.note("If you don't know the basics of Rust, you can go look to the Rust Book \
+ to get started: https://doc.rust-lang.org/book/");
+ }
+ err.emit();
+}
+
+pub fn find_entry_point(tcx: TyCtxt<'_>) -> Option<(DefId, EntryFnType)> {
+ tcx.entry_fn(LOCAL_CRATE)
+}
+
+pub fn provide(providers: &mut Providers<'_>) {
+ *providers = Providers {
+ entry_fn,
+ ..*providers
+ };
+}
Switch to the Rust 2018 edition to use `async fn`.
"##,
+
+// This shouldn't really ever trigger since the repeated value error comes first
+E0136: r##"
+A binary can only have one entry point, and by default that entry point is the
+function `main()`. If there are multiple such functions, please rename one.
+"##,
+
+E0137: r##"
+More than one function was declared with the `#[main]` attribute.
+
+Erroneous code example:
+
+```compile_fail,E0137
+#![feature(main)]
+
+#[main]
+fn foo() {}
+
+#[main]
+fn f() {} // error: multiple functions with a `#[main]` attribute
+```
+
+This error indicates that the compiler found multiple functions with the
+`#[main]` attribute. This is an error because there must be a unique entry
+point into a Rust program. Example:
+
+```
+#![feature(main)]
+
+#[main]
+fn f() {} // ok!
+```
+"##,
+
+E0138: r##"
+More than one function was declared with the `#[start]` attribute.
+
+Erroneous code example:
+
+```compile_fail,E0138
+#![feature(start)]
+
+#[start]
+fn foo(argc: isize, argv: *const *const u8) -> isize {}
+
+#[start]
+fn f(argc: isize, argv: *const *const u8) -> isize {}
+// error: multiple 'start' functions
+```
+
+This error indicates that the compiler found multiple functions with the
+`#[start]` attribute. This is an error because there must be a unique entry
+point into a Rust program. Example:
+
+```
+#![feature(start)]
+
+#[start]
+fn foo(argc: isize, argv: *const *const u8) -> isize { 0 } // ok!
+```
+"##,
+
+E0601: r##"
+No `main` function was found in a binary crate. To fix this error, add a
+`main` function. For example:
+
+```
+fn main() {
+ // Your program will start here.
+ println!("Hello world!");
+}
+```
+
+If you don't know the basics of Rust, you can go look to the Rust Book to get
+started: https://doc.rust-lang.org/book/
+"##,
+
;
E0226, // only a single explicit lifetime bound is permitted
E0472, // asm! is unsupported on this target
#[macro_use]
extern crate rustc;
+#[macro_use]
+extern crate log;
+#[macro_use]
+extern crate syntax;
use rustc::ty::query::Providers;
pub mod layout_test;
pub mod loops;
pub mod dead;
+pub mod entry;
mod liveness;
pub fn provide(providers: &mut Providers<'_>) {
+ entry::provide(providers);
loops::provide(providers);
liveness::provide(providers);
}
projects / rust.git / commitdiff