Auto merge of #31631 - jonas-schievink:agoraphobia, r=nrc

[breaking-batch] Move more uses of `panictry!` out of libsyntax

src/librustc_driver/driver.rs

@@ -48,12 +48,10 @@ use std::fs;
 use std::io::{self, Write};
 use std::path::{Path, PathBuf};
 use syntax::ast::{self, NodeIdAssigner};
-use syntax::attr;
-use syntax::attr::AttrMetaMethods;
+use syntax::attr::{self, AttrMetaMethods};
 use syntax::diagnostics;
 use syntax::fold::Folder;
-use syntax::parse;
-use syntax::parse::token;
+use syntax::parse::{self, PResult, token};
 use syntax::util::node_count::NodeCounter;
 use syntax::visit;
 use syntax;
@@ -86,7 +84,13 @@ pub fn compile_input(sess: &Session,
     // possible to keep the peak memory usage low
     let (outputs, trans) = {
         let (outputs, expanded_crate, id) = {
-            let krate = phase_1_parse_input(sess, cfg, input);
+            let krate = match phase_1_parse_input(sess, cfg, input) {
+                Ok(krate) => krate,
+                Err(mut parse_error) => {
+                    parse_error.emit();
+                    return Err(1);
+                }
+            };
 
             controller_entry_point!(after_parse,
                                     sess,
@@ -415,17 +419,20 @@ impl<'a, 'ast, 'tcx> CompileState<'a, 'ast, 'tcx> {
     }
 }
 
-pub fn phase_1_parse_input(sess: &Session, cfg: ast::CrateConfig, input: &Input) -> ast::Crate {
+pub fn phase_1_parse_input<'a>(sess: &'a Session,
+                               cfg: ast::CrateConfig,
+                               input: &Input)
+                               -> PResult<'a, ast::Crate> {
     // These may be left in an incoherent state after a previous compile.
     // `clear_tables` and `get_ident_interner().clear()` can be used to free
     // memory, but they do not restore the initial state.
     syntax::ext::mtwt::reset_tables();
     token::reset_ident_interner();
 
-    let krate = time(sess.time_passes(), "parsing", || {
+    let krate = try!(time(sess.time_passes(), "parsing", || {
         match *input {
             Input::File(ref file) => {
-                parse::parse_crate_from_file(&(*file), cfg.clone(), &sess.parse_sess)
+                parse::parse_crate_from_file(file, cfg.clone(), &sess.parse_sess)
             }
             Input::Str(ref src) => {
                 parse::parse_crate_from_source_str(anon_src().to_string(),
@@ -434,7 +441,7 @@ pub fn phase_1_parse_input(sess: &Session, cfg: ast::CrateConfig, input: &Input)
                                                    &sess.parse_sess)
             }
         }
-    });
+    }));
 
     if sess.opts.debugging_opts.ast_json_noexpand {
         println!("{}", json::as_json(&krate));
@@ -449,7 +456,7 @@ pub fn phase_1_parse_input(sess: &Session, cfg: ast::CrateConfig, input: &Input)
         syntax::show_span::run(sess.diagnostic(), s, &krate);
     }
 
-    krate
+    Ok(krate)
 }
 
 fn count_nodes(krate: &ast::Crate) -> usize {

src/librustc_driver/lib.rs

@@ -89,7 +89,7 @@ use std::thread;
 use rustc::session::{early_error, early_warn};
 
 use syntax::ast;
-use syntax::parse;
+use syntax::parse::{self, PResult};
 use syntax::errors;
 use syntax::errors::emitter::Emitter;
 use syntax::diagnostics;
@@ -531,7 +531,19 @@ impl RustcDefaultCalls {
             return Compilation::Continue;
         }
 
-        let attrs = input.map(|input| parse_crate_attrs(sess, input));
+        let attrs = match input {
+            None => None,
+            Some(input) => {
+                let result = parse_crate_attrs(sess, input);
+                match result {
+                    Ok(attrs) => Some(attrs),
+                    Err(mut parse_error) => {
+                        parse_error.emit();
+                        return Compilation::Stop;
+                    }
+                }
+            }
+        };
         for req in &sess.opts.prints {
             match *req {
                 PrintRequest::TargetList => {
@@ -977,8 +989,8 @@ pub fn handle_options(mut args: Vec<String>) -> Option<getopts::Matches> {
     Some(matches)
 }
 
-fn parse_crate_attrs(sess: &Session, input: &Input) -> Vec<ast::Attribute> {
-    let result = match *input {
+fn parse_crate_attrs<'a>(sess: &'a Session, input: &Input) -> PResult<'a, Vec<ast::Attribute>> {
+    match *input {
         Input::File(ref ifile) => {
             parse::parse_crate_attrs_from_file(ifile, Vec::new(), &sess.parse_sess)
         }
@@ -988,8 +1000,7 @@ fn parse_crate_attrs(sess: &Session, input: &Input) -> Vec<ast::Attribute> {
                                                      Vec::new(),
                                                      &sess.parse_sess)
         }
-    };
-    result.into_iter().collect()
+    }
 }
 
 /// Run a procedure which will detect panics in the compiler and print nicer

src/librustc_driver/pretty.rs

@@ -686,7 +686,7 @@ pub fn pretty_print_input(sess: Session,
                           ppm: PpMode,
                           opt_uii: Option<UserIdentifiedItem>,
                           ofile: Option<PathBuf>) {
-    let krate = driver::phase_1_parse_input(&sess, cfg, input);
+    let krate = panictry!(driver::phase_1_parse_input(&sess, cfg, input));
 
     let krate = if let PpmSource(PpmEveryBodyLoops) = ppm {
         let mut fold = ReplaceBodyWithLoop::new();

src/librustc_driver/test.rs

@@ -114,7 +114,7 @@ fn test_env<F>(source_string: &str,
     rustc_lint::register_builtins(&mut sess.lint_store.borrow_mut(), Some(&sess));
     let krate_config = Vec::new();
     let input = config::Input::Str(source_string.to_string());
-    let krate = driver::phase_1_parse_input(&sess, krate_config, &input);
+    let krate = driver::phase_1_parse_input(&sess, krate_config, &input).unwrap();
     let krate = driver::phase_2_configure_and_expand(&sess, &cstore, krate, "test", None)
                     .expect("phase 2 aborted");
 

src/librustdoc/core.rs

@@ -133,7 +133,7 @@ pub fn run_core(search_paths: SearchPaths, cfgs: Vec<String>, externs: Externs,
     let mut cfg = config::build_configuration(&sess);
     target_features::add_configuration(&mut cfg, &sess);
 
-    let krate = driver::phase_1_parse_input(&sess, cfg, &input);
+    let krate = panictry!(driver::phase_1_parse_input(&sess, cfg, &input));
 
     let name = link::find_crate_name(Some(&sess), &krate.attrs,
                                      &input);

src/librustdoc/lib.rs

@@ -43,7 +43,7 @@ extern crate rustc_back;
 extern crate rustc_front;
 extern crate rustc_metadata;
 extern crate serialize;
-extern crate syntax;
+#[macro_use] extern crate syntax;
 extern crate test as testing;
 extern crate rustc_unicode;
 #[macro_use] extern crate log;

src/librustdoc/test.rs

@@ -91,7 +91,7 @@ pub fn run(input: &str,
 
     let mut cfg = config::build_configuration(&sess);
     cfg.extend(config::parse_cfgspecs(cfgs.clone()));
-    let krate = driver::phase_1_parse_input(&sess, cfg, &input);
+    let krate = panictry!(driver::phase_1_parse_input(&sess, cfg, &input));
     let krate = driver::phase_2_configure_and_expand(&sess, &cstore, krate,
                                                      "rustdoc-test", None)
         .expect("phase_2_configure_and_expand aborted in rustdoc!");

src/libsyntax/ast.rs

@@ -458,7 +458,7 @@ pub struct WhereEqPredicate {
 
 /// The set of MetaItems that define the compilation environment of the crate,
 /// used to drive conditional compilation
-pub type CrateConfig = Vec<P<MetaItem>> ;
+pub type CrateConfig = Vec<P<MetaItem>>;
 
 #[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Debug)]
 pub struct Crate {

src/libsyntax/ext/expand.rs

@@ -1519,7 +1519,7 @@ mod tests {
         let crate_ast = parse::parse_crate_from_source_str(
             "<test>".to_string(),
             src,
-            Vec::new(), &sess);
+            Vec::new(), &sess).unwrap();
         // should fail:
         let mut gated_cfgs = vec![];
         let ecx = ExtCtxt::new(&sess, vec![], test_ecfg(), &mut gated_cfgs);
@@ -1535,7 +1535,7 @@ mod tests {
         let crate_ast = parse::parse_crate_from_source_str(
             "<test>".to_string(),
             src,
-            Vec::new(), &sess);
+            Vec::new(), &sess).unwrap();
         let mut gated_cfgs = vec![];
         let ecx = ExtCtxt::new(&sess, vec![], test_ecfg(), &mut gated_cfgs);
         expand_crate(ecx, vec![], vec![], crate_ast);
@@ -1549,7 +1549,7 @@ mod tests {
         let crate_ast = parse::parse_crate_from_source_str(
             "<test>".to_string(),
             src,
-            Vec::new(), &sess);
+            Vec::new(), &sess).unwrap();
         let mut gated_cfgs = vec![];
         let ecx = ExtCtxt::new(&sess, vec![], test_ecfg(), &mut gated_cfgs);
         expand_crate(ecx, vec![], vec![], crate_ast);

src/libsyntax/ext/quote.rs

@@ -18,12 +18,12 @@ use parse::token::*;
 use parse::token;
 use ptr::P;
 
-///  Quasiquoting works via token trees.
+/// Quasiquoting works via token trees.
 ///
-///  This is registered as a set of expression syntax extension called quote!
-///  that lifts its argument token-tree to an AST representing the
-///  construction of the same token tree, with token::SubstNt interpreted
-///  as antiquotes (splices).
+/// This is registered as a set of expression syntax extension called quote!
+/// that lifts its argument token-tree to an AST representing the
+/// construction of the same token tree, with token::SubstNt interpreted
+/// as antiquotes (splices).
 
 pub mod rt {
     use ast;
@@ -319,34 +319,36 @@ pub mod rt {
     }
 
     impl<'a> ExtParseUtils for ExtCtxt<'a> {
-
         fn parse_item(&self, s: String) -> P<ast::Item> {
-            parse::parse_item_from_source_str(
+            panictry!(parse::parse_item_from_source_str(
                 "<quote expansion>".to_string(),
                 s,
                 self.cfg(),
-                self.parse_sess()).expect("parse error")
+                self.parse_sess())).expect("parse error")
         }
 
         fn parse_stmt(&self, s: String) -> ast::Stmt {
-            parse::parse_stmt_from_source_str("<quote expansion>".to_string(),
-                                              s,
-                                              self.cfg(),
-                                              self.parse_sess()).expect("parse error")
+            panictry!(parse::parse_stmt_from_source_str(
+                "<quote expansion>".to_string(),
+                s,
+                self.cfg(),
+                self.parse_sess())).expect("parse error")
         }
 
         fn parse_expr(&self, s: String) -> P<ast::Expr> {
-            parse::parse_expr_from_source_str("<quote expansion>".to_string(),
-                                              s,
-                                              self.cfg(),
-                                              self.parse_sess())
+            panictry!(parse::parse_expr_from_source_str(
+                "<quote expansion>".to_string(),
+                s,
+                self.cfg(),
+                self.parse_sess()))
         }
 
         fn parse_tts(&self, s: String) -> Vec<TokenTree> {
-            parse::parse_tts_from_source_str("<quote expansion>".to_string(),
-                                             s,
-                                             self.cfg(),
-                                             self.parse_sess())
+            panictry!(parse::parse_tts_from_source_str(
+                "<quote expansion>".to_string(),
+                s,
+                self.cfg(),
+                self.parse_sess()))
         }
     }
 }