| // Copyright 2012-2013 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| use lint; |
| use middle::cstore::CrateStore; |
| use middle::dependency_format; |
| use session::search_paths::PathKind; |
| use util::nodemap::{NodeMap, FnvHashMap}; |
| |
| use syntax::ast::{NodeId, NodeIdAssigner, Name}; |
| use syntax::codemap::Span; |
| use syntax::errors::{self, DiagnosticBuilder}; |
| use syntax::errors::emitter::{Emitter, BasicEmitter, EmitterWriter}; |
| use syntax::errors::json::JsonEmitter; |
| use syntax::diagnostics; |
| use syntax::feature_gate; |
| use syntax::parse; |
| use syntax::parse::ParseSess; |
| use syntax::{ast, codemap}; |
| use syntax::feature_gate::AttributeType; |
| |
| use rustc_back::target::Target; |
| |
| use std::path::{Path, PathBuf}; |
| use std::cell::{Cell, RefCell}; |
| use std::collections::HashSet; |
| use std::env; |
| use std::rc::Rc; |
| |
| pub mod config; |
| pub mod filesearch; |
| pub mod search_paths; |
| |
| // Represents the data associated with a compilation |
| // session for a single crate. |
| pub struct Session { |
| pub target: config::Config, |
| pub host: Target, |
| pub opts: config::Options, |
| pub cstore: Rc<for<'a> CrateStore<'a>>, |
| pub parse_sess: ParseSess, |
| // For a library crate, this is always none |
| pub entry_fn: RefCell<Option<(NodeId, codemap::Span)>>, |
| pub entry_type: Cell<Option<config::EntryFnType>>, |
| pub plugin_registrar_fn: Cell<Option<ast::NodeId>>, |
| pub default_sysroot: Option<PathBuf>, |
| // The name of the root source file of the crate, in the local file system. |
| // The path is always expected to be absolute. `None` means that there is no |
| // source file. |
| pub local_crate_source_file: Option<PathBuf>, |
| pub working_dir: PathBuf, |
| pub lint_store: RefCell<lint::LintStore>, |
| pub lints: RefCell<NodeMap<Vec<(lint::LintId, codemap::Span, String)>>>, |
| pub plugin_llvm_passes: RefCell<Vec<String>>, |
| pub plugin_attributes: RefCell<Vec<(String, AttributeType)>>, |
| pub crate_types: RefCell<Vec<config::CrateType>>, |
| pub dependency_formats: RefCell<dependency_format::Dependencies>, |
| pub crate_metadata: RefCell<Vec<String>>, |
| pub features: RefCell<feature_gate::Features>, |
| |
| /// The maximum recursion limit for potentially infinitely recursive |
| /// operations such as auto-dereference and monomorphization. |
| pub recursion_limit: Cell<usize>, |
| |
| /// The metadata::creader module may inject an allocator dependency if it |
| /// didn't already find one, and this tracks what was injected. |
| pub injected_allocator: Cell<Option<ast::CrateNum>>, |
| |
| /// Names of all bang-style macros and syntax extensions |
| /// available in this crate |
| pub available_macros: RefCell<HashSet<Name>>, |
| |
| next_node_id: Cell<ast::NodeId>, |
| } |
| |
| impl Session { |
| pub fn struct_span_warn<'a>(&'a self, |
| sp: Span, |
| msg: &str) |
| -> DiagnosticBuilder<'a> { |
| self.diagnostic().struct_span_warn(sp, msg) |
| } |
| pub fn struct_span_warn_with_code<'a>(&'a self, |
| sp: Span, |
| msg: &str, |
| code: &str) |
| -> DiagnosticBuilder<'a> { |
| self.diagnostic().struct_span_warn_with_code(sp, msg, code) |
| } |
| pub fn struct_warn<'a>(&'a self, msg: &str) -> DiagnosticBuilder<'a> { |
| self.diagnostic().struct_warn(msg) |
| } |
| pub fn struct_span_err<'a>(&'a self, |
| sp: Span, |
| msg: &str) |
| -> DiagnosticBuilder<'a> { |
| match split_msg_into_multilines(msg) { |
| Some(ref msg) => self.diagnostic().struct_span_err(sp, msg), |
| None => self.diagnostic().struct_span_err(sp, msg), |
| } |
| } |
| pub fn struct_span_err_with_code<'a>(&'a self, |
| sp: Span, |
| msg: &str, |
| code: &str) |
| -> DiagnosticBuilder<'a> { |
| match split_msg_into_multilines(msg) { |
| Some(ref msg) => self.diagnostic().struct_span_err_with_code(sp, msg, code), |
| None => self.diagnostic().struct_span_err_with_code(sp, msg, code), |
| } |
| } |
| pub fn struct_err<'a>(&'a self, msg: &str) -> DiagnosticBuilder<'a> { |
| self.diagnostic().struct_err(msg) |
| } |
| pub fn struct_span_fatal<'a>(&'a self, |
| sp: Span, |
| msg: &str) |
| -> DiagnosticBuilder<'a> { |
| self.diagnostic().struct_span_fatal(sp, msg) |
| } |
| pub fn struct_span_fatal_with_code<'a>(&'a self, |
| sp: Span, |
| msg: &str, |
| code: &str) |
| -> DiagnosticBuilder<'a> { |
| self.diagnostic().struct_span_fatal_with_code(sp, msg, code) |
| } |
| pub fn struct_fatal<'a>(&'a self, msg: &str) -> DiagnosticBuilder<'a> { |
| self.diagnostic().struct_fatal(msg) |
| } |
| |
| pub fn span_fatal(&self, sp: Span, msg: &str) -> ! { |
| panic!(self.diagnostic().span_fatal(sp, msg)) |
| } |
| pub fn span_fatal_with_code(&self, sp: Span, msg: &str, code: &str) -> ! { |
| panic!(self.diagnostic().span_fatal_with_code(sp, msg, code)) |
| } |
| pub fn fatal(&self, msg: &str) -> ! { |
| panic!(self.diagnostic().fatal(msg)) |
| } |
| pub fn span_err_or_warn(&self, is_warning: bool, sp: Span, msg: &str) { |
| if is_warning { |
| self.span_warn(sp, msg); |
| } else { |
| self.span_err(sp, msg); |
| } |
| } |
| pub fn span_err(&self, sp: Span, msg: &str) { |
| match split_msg_into_multilines(msg) { |
| Some(msg) => self.diagnostic().span_err(sp, &msg), |
| None => self.diagnostic().span_err(sp, msg) |
| } |
| } |
| pub fn span_err_with_code(&self, sp: Span, msg: &str, code: &str) { |
| match split_msg_into_multilines(msg) { |
| Some(msg) => self.diagnostic().span_err_with_code(sp, &msg, code), |
| None => self.diagnostic().span_err_with_code(sp, msg, code) |
| } |
| } |
| pub fn err(&self, msg: &str) { |
| self.diagnostic().err(msg) |
| } |
| pub fn err_count(&self) -> usize { |
| self.diagnostic().err_count() |
| } |
| pub fn has_errors(&self) -> bool { |
| self.diagnostic().has_errors() |
| } |
| pub fn abort_if_errors(&self) { |
| self.diagnostic().abort_if_errors(); |
| } |
| pub fn abort_if_new_errors<F>(&self, mut f: F) |
| where F: FnMut() |
| { |
| let count = self.err_count(); |
| f(); |
| if self.err_count() > count { |
| self.abort_if_errors(); |
| } |
| } |
| pub fn span_warn(&self, sp: Span, msg: &str) { |
| self.diagnostic().span_warn(sp, msg) |
| } |
| pub fn span_warn_with_code(&self, sp: Span, msg: &str, code: &str) { |
| self.diagnostic().span_warn_with_code(sp, msg, code) |
| } |
| pub fn warn(&self, msg: &str) { |
| self.diagnostic().warn(msg) |
| } |
| pub fn opt_span_warn(&self, opt_sp: Option<Span>, msg: &str) { |
| match opt_sp { |
| Some(sp) => self.span_warn(sp, msg), |
| None => self.warn(msg), |
| } |
| } |
| pub fn opt_span_bug(&self, opt_sp: Option<Span>, msg: &str) -> ! { |
| match opt_sp { |
| Some(sp) => self.span_bug(sp, msg), |
| None => self.bug(msg), |
| } |
| } |
| /// Delay a span_bug() call until abort_if_errors() |
| pub fn delay_span_bug(&self, sp: Span, msg: &str) { |
| self.diagnostic().delay_span_bug(sp, msg) |
| } |
| pub fn span_bug(&self, sp: Span, msg: &str) -> ! { |
| self.diagnostic().span_bug(sp, msg) |
| } |
| pub fn bug(&self, msg: &str) -> ! { |
| self.diagnostic().bug(msg) |
| } |
| pub fn note_without_error(&self, msg: &str) { |
| self.diagnostic().note_without_error(msg) |
| } |
| pub fn span_note_without_error(&self, sp: Span, msg: &str) { |
| self.diagnostic().span_note_without_error(sp, msg) |
| } |
| pub fn span_unimpl(&self, sp: Span, msg: &str) -> ! { |
| self.diagnostic().span_unimpl(sp, msg) |
| } |
| pub fn unimpl(&self, msg: &str) -> ! { |
| self.diagnostic().unimpl(msg) |
| } |
| pub fn add_lint(&self, |
| lint: &'static lint::Lint, |
| id: ast::NodeId, |
| sp: Span, |
| msg: String) { |
| let lint_id = lint::LintId::of(lint); |
| let mut lints = self.lints.borrow_mut(); |
| match lints.get_mut(&id) { |
| Some(arr) => { arr.push((lint_id, sp, msg)); return; } |
| None => {} |
| } |
| lints.insert(id, vec!((lint_id, sp, msg))); |
| } |
| pub fn reserve_node_ids(&self, count: ast::NodeId) -> ast::NodeId { |
| let id = self.next_node_id.get(); |
| |
| match id.checked_add(count) { |
| Some(next) => self.next_node_id.set(next), |
| None => self.bug("Input too large, ran out of node ids!") |
| } |
| |
| id |
| } |
| pub fn diagnostic<'a>(&'a self) -> &'a errors::Handler { |
| &self.parse_sess.span_diagnostic |
| } |
| pub fn codemap<'a>(&'a self) -> &'a codemap::CodeMap { |
| self.parse_sess.codemap() |
| } |
| // This exists to help with refactoring to eliminate impossible |
| // cases later on |
| pub fn impossible_case(&self, sp: Span, msg: &str) -> ! { |
| self.span_bug(sp, &format!("impossible case reached: {}", msg)); |
| } |
| pub fn verbose(&self) -> bool { self.opts.debugging_opts.verbose } |
| pub fn time_passes(&self) -> bool { self.opts.debugging_opts.time_passes } |
| pub fn count_llvm_insns(&self) -> bool { |
| self.opts.debugging_opts.count_llvm_insns |
| } |
| pub fn count_type_sizes(&self) -> bool { |
| self.opts.debugging_opts.count_type_sizes |
| } |
| pub fn time_llvm_passes(&self) -> bool { |
| self.opts.debugging_opts.time_llvm_passes |
| } |
| pub fn trans_stats(&self) -> bool { self.opts.debugging_opts.trans_stats } |
| pub fn meta_stats(&self) -> bool { self.opts.debugging_opts.meta_stats } |
| pub fn asm_comments(&self) -> bool { self.opts.debugging_opts.asm_comments } |
| pub fn no_verify(&self) -> bool { self.opts.debugging_opts.no_verify } |
| pub fn borrowck_stats(&self) -> bool { self.opts.debugging_opts.borrowck_stats } |
| pub fn print_llvm_passes(&self) -> bool { |
| self.opts.debugging_opts.print_llvm_passes |
| } |
| pub fn lto(&self) -> bool { |
| self.opts.cg.lto |
| } |
| pub fn no_landing_pads(&self) -> bool { |
| self.opts.debugging_opts.no_landing_pads |
| } |
| pub fn unstable_options(&self) -> bool { |
| self.opts.debugging_opts.unstable_options |
| } |
| pub fn print_enum_sizes(&self) -> bool { |
| self.opts.debugging_opts.print_enum_sizes |
| } |
| pub fn nonzeroing_move_hints(&self) -> bool { |
| self.opts.debugging_opts.enable_nonzeroing_move_hints |
| } |
| pub fn sysroot<'a>(&'a self) -> &'a Path { |
| match self.opts.maybe_sysroot { |
| Some (ref sysroot) => sysroot, |
| None => self.default_sysroot.as_ref() |
| .expect("missing sysroot and default_sysroot in Session") |
| } |
| } |
| pub fn target_filesearch(&self, kind: PathKind) -> filesearch::FileSearch { |
| filesearch::FileSearch::new(self.sysroot(), |
| &self.opts.target_triple, |
| &self.opts.search_paths, |
| kind) |
| } |
| pub fn host_filesearch(&self, kind: PathKind) -> filesearch::FileSearch { |
| filesearch::FileSearch::new( |
| self.sysroot(), |
| config::host_triple(), |
| &self.opts.search_paths, |
| kind) |
| } |
| } |
| |
| impl NodeIdAssigner for Session { |
| fn next_node_id(&self) -> NodeId { |
| self.reserve_node_ids(1) |
| } |
| |
| fn peek_node_id(&self) -> NodeId { |
| self.next_node_id.get().checked_add(1).unwrap() |
| } |
| } |
| |
| fn split_msg_into_multilines(msg: &str) -> Option<String> { |
| // Conditions for enabling multi-line errors: |
| if !msg.contains("mismatched types") && |
| !msg.contains("type mismatch resolving") && |
| !msg.contains("if and else have incompatible types") && |
| !msg.contains("if may be missing an else clause") && |
| !msg.contains("match arms have incompatible types") && |
| !msg.contains("structure constructor specifies a structure of type") && |
| !msg.contains("has an incompatible type for trait") { |
| return None |
| } |
| let first = msg.match_indices("expected").filter(|s| { |
| s.0 > 0 && (msg.char_at_reverse(s.0) == ' ' || |
| msg.char_at_reverse(s.0) == '(') |
| }).map(|(a, b)| (a - 1, a + b.len())); |
| let second = msg.match_indices("found").filter(|s| { |
| msg.char_at_reverse(s.0) == ' ' |
| }).map(|(a, b)| (a - 1, a + b.len())); |
| |
| let mut new_msg = String::new(); |
| let mut head = 0; |
| |
| // Insert `\n` before expected and found. |
| for (pos1, pos2) in first.zip(second) { |
| new_msg = new_msg + |
| // A `(` may be preceded by a space and it should be trimmed |
| msg[head..pos1.0].trim_right() + // prefix |
| "\n" + // insert before first |
| &msg[pos1.0..pos1.1] + // insert what first matched |
| &msg[pos1.1..pos2.0] + // between matches |
| "\n " + // insert before second |
| // 123 |
| // `expected` is 3 char longer than `found`. To align the types, |
| // `found` gets 3 spaces prepended. |
| &msg[pos2.0..pos2.1]; // insert what second matched |
| |
| head = pos2.1; |
| } |
| |
| let mut tail = &msg[head..]; |
| let third = tail.find("(values differ") |
| .or(tail.find("(lifetime")) |
| .or(tail.find("(cyclic type of infinite size")); |
| // Insert `\n` before any remaining messages which match. |
| if let Some(pos) = third { |
| // The end of the message may just be wrapped in `()` without |
| // `expected`/`found`. Push this also to a new line and add the |
| // final tail after. |
| new_msg = new_msg + |
| // `(` is usually preceded by a space and should be trimmed. |
| tail[..pos].trim_right() + // prefix |
| "\n" + // insert before paren |
| &tail[pos..]; // append the tail |
| |
| tail = ""; |
| } |
| |
| new_msg.push_str(tail); |
| return Some(new_msg); |
| } |
| |
| pub fn build_session(sopts: config::Options, |
| local_crate_source_file: Option<PathBuf>, |
| registry: diagnostics::registry::Registry, |
| cstore: Rc<for<'a> CrateStore<'a>>) |
| -> Session { |
| // FIXME: This is not general enough to make the warning lint completely override |
| // normal diagnostic warnings, since the warning lint can also be denied and changed |
| // later via the source code. |
| let can_print_warnings = sopts.lint_opts |
| .iter() |
| .filter(|&&(ref key, _)| *key == "warnings") |
| .map(|&(_, ref level)| *level != lint::Allow) |
| .last() |
| .unwrap_or(true); |
| let treat_err_as_bug = sopts.treat_err_as_bug; |
| |
| let codemap = Rc::new(codemap::CodeMap::new()); |
| let emitter: Box<Emitter> = match sopts.error_format { |
| config::ErrorOutputType::HumanReadable(color_config) => { |
| Box::new(EmitterWriter::stderr(color_config, Some(registry), codemap.clone())) |
| } |
| config::ErrorOutputType::Json => { |
| Box::new(JsonEmitter::stderr(Some(registry), codemap.clone())) |
| } |
| }; |
| |
| let diagnostic_handler = |
| errors::Handler::with_emitter(can_print_warnings, |
| treat_err_as_bug, |
| emitter); |
| |
| build_session_(sopts, local_crate_source_file, diagnostic_handler, codemap, cstore) |
| } |
| |
| pub fn build_session_(sopts: config::Options, |
| local_crate_source_file: Option<PathBuf>, |
| span_diagnostic: errors::Handler, |
| codemap: Rc<codemap::CodeMap>, |
| cstore: Rc<for<'a> CrateStore<'a>>) |
| -> Session { |
| let host = match Target::search(config::host_triple()) { |
| Ok(t) => t, |
| Err(e) => { |
| panic!(span_diagnostic.fatal(&format!("Error loading host specification: {}", e))); |
| } |
| }; |
| let target_cfg = config::build_target_config(&sopts, &span_diagnostic); |
| let p_s = parse::ParseSess::with_span_handler(span_diagnostic, codemap); |
| let default_sysroot = match sopts.maybe_sysroot { |
| Some(_) => None, |
| None => Some(filesearch::get_or_default_sysroot()) |
| }; |
| |
| // Make the path absolute, if necessary |
| let local_crate_source_file = local_crate_source_file.map(|path| |
| if path.is_absolute() { |
| path.clone() |
| } else { |
| env::current_dir().unwrap().join(&path) |
| } |
| ); |
| |
| let sess = Session { |
| target: target_cfg, |
| host: host, |
| opts: sopts, |
| cstore: cstore, |
| parse_sess: p_s, |
| // For a library crate, this is always none |
| entry_fn: RefCell::new(None), |
| entry_type: Cell::new(None), |
| plugin_registrar_fn: Cell::new(None), |
| default_sysroot: default_sysroot, |
| local_crate_source_file: local_crate_source_file, |
| working_dir: env::current_dir().unwrap(), |
| lint_store: RefCell::new(lint::LintStore::new()), |
| lints: RefCell::new(NodeMap()), |
| plugin_llvm_passes: RefCell::new(Vec::new()), |
| plugin_attributes: RefCell::new(Vec::new()), |
| crate_types: RefCell::new(Vec::new()), |
| dependency_formats: RefCell::new(FnvHashMap()), |
| crate_metadata: RefCell::new(Vec::new()), |
| features: RefCell::new(feature_gate::Features::new()), |
| recursion_limit: Cell::new(64), |
| next_node_id: Cell::new(1), |
| injected_allocator: Cell::new(None), |
| available_macros: RefCell::new(HashSet::new()), |
| }; |
| |
| sess |
| } |
| |
| pub fn early_error(output: config::ErrorOutputType, msg: &str) -> ! { |
| let mut emitter: Box<Emitter> = match output { |
| config::ErrorOutputType::HumanReadable(color_config) => { |
| Box::new(BasicEmitter::stderr(color_config)) |
| } |
| config::ErrorOutputType::Json => Box::new(JsonEmitter::basic()), |
| }; |
| emitter.emit(None, msg, None, errors::Level::Fatal); |
| panic!(errors::FatalError); |
| } |
| |
| pub fn early_warn(output: config::ErrorOutputType, msg: &str) { |
| let mut emitter: Box<Emitter> = match output { |
| config::ErrorOutputType::HumanReadable(color_config) => { |
| Box::new(BasicEmitter::stderr(color_config)) |
| } |
| config::ErrorOutputType::Json => Box::new(JsonEmitter::basic()), |
| }; |
| emitter.emit(None, msg, None, errors::Level::Warning); |
| } |
