// Copyright 2014 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 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. //! The various pretty print routines. pub use self::UserIdentifiedItem::*; pub use self::PpSourceMode::*; pub use self::PpMode::*; use self::NodesMatchingUII::*; use rustc_trans::back::link; use {driver, abort_on_err}; use rustc::dep_graph::DepGraph; use rustc::middle::ty; use rustc::middle::cfg; use rustc::middle::cfg::graphviz::LabelledCFG; use rustc::session::Session; use rustc::session::config::Input; use rustc_borrowck as borrowck; use rustc_borrowck::graphviz as borrowck_dot; use rustc_resolve as resolve; use rustc_metadata::cstore::CStore; use rustc_mir::pretty::write_mir_pretty; use syntax::ast::{self, BlockCheckMode}; use syntax::codemap; use syntax::fold::{self, Folder}; use syntax::print::{pp, pprust}; use syntax::print::pprust::PrintState; use syntax::ptr::P; use syntax::util::small_vector::SmallVector; use graphviz as dot; use std::fs::File; use std::io::{self, Write}; use std::option; use std::path::PathBuf; use std::str::FromStr; use rustc::front::map as hir_map; use rustc::front::map::{blocks, NodePrinter}; use rustc_front::hir; use rustc_front::lowering::{lower_crate, LoweringContext}; use rustc_front::print::pprust as pprust_hir; #[derive(Copy, Clone, PartialEq, Debug)] pub enum PpSourceMode { PpmNormal, PpmEveryBodyLoops, PpmExpanded, PpmIdentified, PpmExpandedIdentified, PpmExpandedHygiene, PpmTyped, } #[derive(Copy, Clone, PartialEq, Debug)] pub enum PpFlowGraphMode { Default, /// Drops the labels from the edges in the flowgraph output. This /// is mostly for use in the --unpretty flowgraph run-make tests, /// since the labels are largely uninteresting in those cases and /// have become a pain to maintain. UnlabelledEdges, } #[derive(Copy, Clone, PartialEq, Debug)] pub enum PpMode { PpmSource(PpSourceMode), PpmHir(PpSourceMode), PpmFlowGraph(PpFlowGraphMode), PpmMir, } pub fn parse_pretty(sess: &Session, name: &str, extended: bool) -> (PpMode, Option) { let mut split = name.splitn(2, '='); let first = split.next().unwrap(); let opt_second = split.next(); let first = match (first, extended) { ("normal", _) => PpmSource(PpmNormal), ("identified", _) => PpmSource(PpmIdentified), ("everybody_loops", true) => PpmSource(PpmEveryBodyLoops), ("expanded", _) => PpmSource(PpmExpanded), ("expanded,identified", _) => PpmSource(PpmExpandedIdentified), ("expanded,hygiene", _) => PpmSource(PpmExpandedHygiene), ("hir", true) => PpmHir(PpmNormal), ("hir,identified", true) => PpmHir(PpmIdentified), ("hir,typed", true) => PpmHir(PpmTyped), ("mir", true) => PpmMir, ("flowgraph", true) => PpmFlowGraph(PpFlowGraphMode::Default), ("flowgraph,unlabelled", true) => PpmFlowGraph(PpFlowGraphMode::UnlabelledEdges), _ => { if extended { sess.fatal(&format!("argument to `unpretty` must be one of `normal`, \ `expanded`, `flowgraph[,unlabelled]=`, \ `identified`, `expanded,identified`, `everybody_loops`, \ `hir`, `hir,identified`, `hir,typed`, or `mir`; got {}", name)); } else { sess.fatal(&format!("argument to `pretty` must be one of `normal`, `expanded`, \ `identified`, or `expanded,identified`; got {}", name)); } } }; let opt_second = opt_second.and_then(|s| s.parse::().ok()); (first, opt_second) } // This slightly awkward construction is to allow for each PpMode to // choose whether it needs to do analyses (which can consume the // Session) and then pass through the session (now attached to the // analysis results) on to the chosen pretty-printer, along with the // `&PpAnn` object. // // Note that since the `&PrinterSupport` is freshly constructed on each // call, it would not make sense to try to attach the lifetime of `self` // to the lifetime of the `&PrinterObject`. // // (The `use_once_payload` is working around the current lack of once // functions in the compiler.) impl PpSourceMode { /// Constructs a `PrinterSupport` object and passes it to `f`. fn call_with_pp_support<'tcx, A, B, F>(&self, sess: &'tcx Session, ast_map: Option>, payload: B, f: F) -> A where F: FnOnce(&PrinterSupport, B) -> A { match *self { PpmNormal | PpmEveryBodyLoops | PpmExpanded => { let annotation = NoAnn { sess: sess, ast_map: ast_map, }; f(&annotation, payload) } PpmIdentified | PpmExpandedIdentified => { let annotation = IdentifiedAnnotation { sess: sess, ast_map: ast_map, }; f(&annotation, payload) } PpmExpandedHygiene => { let annotation = HygieneAnnotation { sess: sess, ast_map: ast_map, }; f(&annotation, payload) } _ => panic!("Should use call_with_pp_support_hir"), } } fn call_with_pp_support_hir<'tcx, A, B, F>(&self, sess: &'tcx Session, cstore: &CStore, ast_map: &hir_map::Map<'tcx>, arenas: &'tcx ty::CtxtArenas<'tcx>, id: &str, payload: B, f: F) -> A where F: FnOnce(&HirPrinterSupport, B, &hir::Crate) -> A { match *self { PpmNormal => { let annotation = NoAnn { sess: sess, ast_map: Some(ast_map.clone()), }; f(&annotation, payload, ast_map.forest.krate()) } PpmIdentified => { let annotation = IdentifiedAnnotation { sess: sess, ast_map: Some(ast_map.clone()), }; f(&annotation, payload, ast_map.forest.krate()) } PpmTyped => { abort_on_err(driver::phase_3_run_analysis_passes(sess, cstore, ast_map.clone(), arenas, id, resolve::MakeGlobMap::No, |tcx, _, _, _| { let annotation = TypedAnnotation { tcx: tcx, }; let _ignore = tcx.dep_graph.in_ignore(); f(&annotation, payload, ast_map.forest.krate()) }), sess) } _ => panic!("Should use call_with_pp_support"), } } } trait PrinterSupport<'ast>: pprust::PpAnn { /// Provides a uniform interface for re-extracting a reference to a /// `Session` from a value that now owns it. fn sess<'a>(&'a self) -> &'a Session; /// Provides a uniform interface for re-extracting a reference to an /// `hir_map::Map` from a value that now owns it. fn ast_map<'a>(&'a self) -> Option<&'a hir_map::Map<'ast>>; /// Produces the pretty-print annotation object. /// /// (Rust does not yet support upcasting from a trait object to /// an object for one of its super-traits.) fn pp_ann<'a>(&'a self) -> &'a pprust::PpAnn; } trait HirPrinterSupport<'ast>: pprust_hir::PpAnn { /// Provides a uniform interface for re-extracting a reference to a /// `Session` from a value that now owns it. fn sess<'a>(&'a self) -> &'a Session; /// Provides a uniform interface for re-extracting a reference to an /// `hir_map::Map` from a value that now owns it. fn ast_map<'a>(&'a self) -> Option<&'a hir_map::Map<'ast>>; /// Produces the pretty-print annotation object. /// /// (Rust does not yet support upcasting from a trait object to /// an object for one of its super-traits.) fn pp_ann<'a>(&'a self) -> &'a pprust_hir::PpAnn; } struct NoAnn<'ast> { sess: &'ast Session, ast_map: Option>, } impl<'ast> PrinterSupport<'ast> for NoAnn<'ast> { fn sess<'a>(&'a self) -> &'a Session { self.sess } fn ast_map<'a>(&'a self) -> Option<&'a hir_map::Map<'ast>> { self.ast_map.as_ref() } fn pp_ann<'a>(&'a self) -> &'a pprust::PpAnn { self } } impl<'ast> HirPrinterSupport<'ast> for NoAnn<'ast> { fn sess<'a>(&'a self) -> &'a Session { self.sess } fn ast_map<'a>(&'a self) -> Option<&'a hir_map::Map<'ast>> { self.ast_map.as_ref() } fn pp_ann<'a>(&'a self) -> &'a pprust_hir::PpAnn { self } } impl<'ast> pprust::PpAnn for NoAnn<'ast> {} impl<'ast> pprust_hir::PpAnn for NoAnn<'ast> {} struct IdentifiedAnnotation<'ast> { sess: &'ast Session, ast_map: Option>, } impl<'ast> PrinterSupport<'ast> for IdentifiedAnnotation<'ast> { fn sess<'a>(&'a self) -> &'a Session { self.sess } fn ast_map<'a>(&'a self) -> Option<&'a hir_map::Map<'ast>> { self.ast_map.as_ref() } fn pp_ann<'a>(&'a self) -> &'a pprust::PpAnn { self } } impl<'ast> pprust::PpAnn for IdentifiedAnnotation<'ast> { fn pre(&self, s: &mut pprust::State, node: pprust::AnnNode) -> io::Result<()> { match node { pprust::NodeExpr(_) => s.popen(), _ => Ok(()), } } fn post(&self, s: &mut pprust::State, node: pprust::AnnNode) -> io::Result<()> { match node { pprust::NodeIdent(_) | pprust::NodeName(_) => Ok(()), pprust::NodeItem(item) => { try!(pp::space(&mut s.s)); s.synth_comment(item.id.to_string()) } pprust::NodeSubItem(id) => { try!(pp::space(&mut s.s)); s.synth_comment(id.to_string()) } pprust::NodeBlock(blk) => { try!(pp::space(&mut s.s)); s.synth_comment(format!("block {}", blk.id)) } pprust::NodeExpr(expr) => { try!(pp::space(&mut s.s)); try!(s.synth_comment(expr.id.to_string())); s.pclose() } pprust::NodePat(pat) => { try!(pp::space(&mut s.s)); s.synth_comment(format!("pat {}", pat.id)) } } } } impl<'ast> HirPrinterSupport<'ast> for IdentifiedAnnotation<'ast> { fn sess<'a>(&'a self) -> &'a Session { self.sess } fn ast_map<'a>(&'a self) -> Option<&'a hir_map::Map<'ast>> { self.ast_map.as_ref() } fn pp_ann<'a>(&'a self) -> &'a pprust_hir::PpAnn { self } } impl<'ast> pprust_hir::PpAnn for IdentifiedAnnotation<'ast> { fn pre(&self, s: &mut pprust_hir::State, node: pprust_hir::AnnNode) -> io::Result<()> { match node { pprust_hir::NodeExpr(_) => s.popen(), _ => Ok(()), } } fn post(&self, s: &mut pprust_hir::State, node: pprust_hir::AnnNode) -> io::Result<()> { match node { pprust_hir::NodeName(_) => Ok(()), pprust_hir::NodeItem(item) => { try!(pp::space(&mut s.s)); s.synth_comment(item.id.to_string()) } pprust_hir::NodeSubItem(id) => { try!(pp::space(&mut s.s)); s.synth_comment(id.to_string()) } pprust_hir::NodeBlock(blk) => { try!(pp::space(&mut s.s)); s.synth_comment(format!("block {}", blk.id)) } pprust_hir::NodeExpr(expr) => { try!(pp::space(&mut s.s)); try!(s.synth_comment(expr.id.to_string())); s.pclose() } pprust_hir::NodePat(pat) => { try!(pp::space(&mut s.s)); s.synth_comment(format!("pat {}", pat.id)) } } } } struct HygieneAnnotation<'ast> { sess: &'ast Session, ast_map: Option>, } impl<'ast> PrinterSupport<'ast> for HygieneAnnotation<'ast> { fn sess<'a>(&'a self) -> &'a Session { self.sess } fn ast_map<'a>(&'a self) -> Option<&'a hir_map::Map<'ast>> { self.ast_map.as_ref() } fn pp_ann<'a>(&'a self) -> &'a pprust::PpAnn { self } } impl<'ast> pprust::PpAnn for HygieneAnnotation<'ast> { fn post(&self, s: &mut pprust::State, node: pprust::AnnNode) -> io::Result<()> { match node { pprust::NodeIdent(&ast::Ident { name: ast::Name(nm), ctxt }) => { try!(pp::space(&mut s.s)); // FIXME #16420: this doesn't display the connections // between syntax contexts s.synth_comment(format!("{}#{}", nm, ctxt.0)) } pprust::NodeName(&ast::Name(nm)) => { try!(pp::space(&mut s.s)); s.synth_comment(nm.to_string()) } _ => Ok(()), } } } struct TypedAnnotation<'a, 'tcx: 'a> { tcx: &'a ty::ctxt<'tcx>, } impl<'b, 'tcx> HirPrinterSupport<'tcx> for TypedAnnotation<'b, 'tcx> { fn sess<'a>(&'a self) -> &'a Session { &self.tcx.sess } fn ast_map<'a>(&'a self) -> Option<&'a hir_map::Map<'tcx>> { Some(&self.tcx.map) } fn pp_ann<'a>(&'a self) -> &'a pprust_hir::PpAnn { self } } impl<'a, 'tcx> pprust_hir::PpAnn for TypedAnnotation<'a, 'tcx> { fn pre(&self, s: &mut pprust_hir::State, node: pprust_hir::AnnNode) -> io::Result<()> { match node { pprust_hir::NodeExpr(_) => s.popen(), _ => Ok(()), } } fn post(&self, s: &mut pprust_hir::State, node: pprust_hir::AnnNode) -> io::Result<()> { match node { pprust_hir::NodeExpr(expr) => { try!(pp::space(&mut s.s)); try!(pp::word(&mut s.s, "as")); try!(pp::space(&mut s.s)); try!(pp::word(&mut s.s, &self.tcx.expr_ty(expr).to_string())); s.pclose() } _ => Ok(()), } } } fn gather_flowgraph_variants(sess: &Session) -> Vec { let print_loans = sess.opts.debugging_opts.flowgraph_print_loans; let print_moves = sess.opts.debugging_opts.flowgraph_print_moves; let print_assigns = sess.opts.debugging_opts.flowgraph_print_assigns; let print_all = sess.opts.debugging_opts.flowgraph_print_all; let mut variants = Vec::new(); if print_all || print_loans { variants.push(borrowck_dot::Loans); } if print_all || print_moves { variants.push(borrowck_dot::Moves); } if print_all || print_assigns { variants.push(borrowck_dot::Assigns); } variants } #[derive(Clone, Debug)] pub enum UserIdentifiedItem { ItemViaNode(ast::NodeId), ItemViaPath(Vec), } impl FromStr for UserIdentifiedItem { type Err = (); fn from_str(s: &str) -> Result { Ok(s.parse() .map(ItemViaNode) .unwrap_or_else(|_| ItemViaPath(s.split("::").map(|s| s.to_string()).collect()))) } } enum NodesMatchingUII<'a, 'ast: 'a> { NodesMatchingDirect(option::IntoIter), NodesMatchingSuffix(hir_map::NodesMatchingSuffix<'a, 'ast>), } impl<'a, 'ast> Iterator for NodesMatchingUII<'a, 'ast> { type Item = ast::NodeId; fn next(&mut self) -> Option { match self { &mut NodesMatchingDirect(ref mut iter) => iter.next(), &mut NodesMatchingSuffix(ref mut iter) => iter.next(), } } } impl UserIdentifiedItem { fn reconstructed_input(&self) -> String { match *self { ItemViaNode(node_id) => node_id.to_string(), ItemViaPath(ref parts) => parts.join("::"), } } fn all_matching_node_ids<'a, 'ast>(&'a self, map: &'a hir_map::Map<'ast>) -> NodesMatchingUII<'a, 'ast> { match *self { ItemViaNode(node_id) => NodesMatchingDirect(Some(node_id).into_iter()), ItemViaPath(ref parts) => NodesMatchingSuffix(map.nodes_matching_suffix(&parts[..])), } } fn to_one_node_id(self, user_option: &str, sess: &Session, map: &hir_map::Map) -> ast::NodeId { let fail_because = |is_wrong_because| -> ast::NodeId { let message = format!("{} needs NodeId (int) or unique path suffix (b::c::d); got \ {}, which {}", user_option, self.reconstructed_input(), is_wrong_because); sess.fatal(&message[..]) }; let mut saw_node = ast::DUMMY_NODE_ID; let mut seen = 0; for node in self.all_matching_node_ids(map) { saw_node = node; seen += 1; if seen > 1 { fail_because("does not resolve uniquely"); } } if seen == 0 { fail_because("does not resolve to any item"); } assert!(seen == 1); return saw_node; } } fn needs_ast_map(ppm: &PpMode, opt_uii: &Option) -> bool { match *ppm { PpmSource(PpmNormal) | PpmSource(PpmEveryBodyLoops) | PpmSource(PpmIdentified) => opt_uii.is_some(), PpmSource(PpmExpanded) | PpmSource(PpmExpandedIdentified) | PpmSource(PpmExpandedHygiene) | PpmHir(_) | PpmMir | PpmFlowGraph(_) => true, PpmSource(PpmTyped) => panic!("invalid state"), } } fn needs_expansion(ppm: &PpMode) -> bool { match *ppm { PpmSource(PpmNormal) | PpmSource(PpmEveryBodyLoops) | PpmSource(PpmIdentified) => false, PpmSource(PpmExpanded) | PpmSource(PpmExpandedIdentified) | PpmSource(PpmExpandedHygiene) | PpmHir(_) | PpmMir | PpmFlowGraph(_) => true, PpmSource(PpmTyped) => panic!("invalid state"), } } struct ReplaceBodyWithLoop { within_static_or_const: bool, } impl ReplaceBodyWithLoop { fn new() -> ReplaceBodyWithLoop { ReplaceBodyWithLoop { within_static_or_const: false } } } impl fold::Folder for ReplaceBodyWithLoop { fn fold_item_kind(&mut self, i: ast::ItemKind) -> ast::ItemKind { match i { ast::ItemKind::Static(..) | ast::ItemKind::Const(..) => { self.within_static_or_const = true; let ret = fold::noop_fold_item_kind(i, self); self.within_static_or_const = false; return ret; } _ => { fold::noop_fold_item_kind(i, self) } } } fn fold_trait_item(&mut self, i: ast::TraitItem) -> SmallVector { match i.node { ast::TraitItemKind::Const(..) => { self.within_static_or_const = true; let ret = fold::noop_fold_trait_item(i, self); self.within_static_or_const = false; return ret; } _ => fold::noop_fold_trait_item(i, self), } } fn fold_impl_item(&mut self, i: ast::ImplItem) -> SmallVector { match i.node { ast::ImplItemKind::Const(..) => { self.within_static_or_const = true; let ret = fold::noop_fold_impl_item(i, self); self.within_static_or_const = false; return ret; } _ => fold::noop_fold_impl_item(i, self), } } fn fold_block(&mut self, b: P) -> P { fn expr_to_block(rules: ast::BlockCheckMode, e: Option>) -> P { P(ast::Block { expr: e, stmts: vec![], rules: rules, id: ast::DUMMY_NODE_ID, span: codemap::DUMMY_SP, }) } if !self.within_static_or_const { let empty_block = expr_to_block(BlockCheckMode::Default, None); let loop_expr = P(ast::Expr { node: ast::ExprKind::Loop(empty_block, None), id: ast::DUMMY_NODE_ID, span: codemap::DUMMY_SP, attrs: None, }); expr_to_block(b.rules, Some(loop_expr)) } else { fold::noop_fold_block(b, self) } } // in general the pretty printer processes unexpanded code, so // we override the default `fold_mac` method which panics. fn fold_mac(&mut self, mac: ast::Mac) -> ast::Mac { fold::noop_fold_mac(mac, self) } } pub fn pretty_print_input(sess: Session, cstore: &CStore, cfg: ast::CrateConfig, input: &Input, ppm: PpMode, opt_uii: Option, ofile: Option) { let krate = driver::phase_1_parse_input(&sess, cfg, input); let krate = if let PpmSource(PpmEveryBodyLoops) = ppm { let mut fold = ReplaceBodyWithLoop::new(); fold.fold_crate(krate) } else { krate }; let id = link::find_crate_name(Some(&sess), &krate.attrs, input); let is_expanded = needs_expansion(&ppm); let compute_ast_map = needs_ast_map(&ppm, &opt_uii); let krate = if compute_ast_map { match driver::phase_2_configure_and_expand(&sess, &cstore, krate, &id[..], None) { Err(_) => return, Ok(k) => driver::assign_node_ids(&sess, k), } } else { krate }; // There is some twisted, god-forsaken tangle of lifetimes here which makes // the ordering of stuff super-finicky. let mut hir_forest; let lcx = LoweringContext::new(&sess, Some(&krate)); let arenas = ty::CtxtArenas::new(); let dep_graph = DepGraph::new(false); let _ignore = dep_graph.in_ignore(); let ast_map = if compute_ast_map { hir_forest = hir_map::Forest::new(lower_crate(&lcx, &krate), dep_graph.clone()); let map = driver::make_map(&sess, &mut hir_forest); Some(map) } else { None }; let src_name = driver::source_name(input); let src = sess.codemap() .get_filemap(&src_name[..]) .src .as_ref() .unwrap() .as_bytes() .to_vec(); let mut rdr = &src[..]; let mut out = Vec::new(); match (ppm, opt_uii) { (PpmSource(s), _) => { // Silently ignores an identified node. let out: &mut Write = &mut out; s.call_with_pp_support(&sess, ast_map, box out, |annotation, out| { debug!("pretty printing source code {:?}", s); let sess = annotation.sess(); pprust::print_crate(sess.codemap(), sess.diagnostic(), &krate, src_name.to_string(), &mut rdr, out, annotation.pp_ann(), is_expanded) }) } (PpmHir(s), None) => { let out: &mut Write = &mut out; s.call_with_pp_support_hir(&sess, cstore, &ast_map.unwrap(), &arenas, &id, box out, |annotation, out, krate| { debug!("pretty printing source code {:?}", s); let sess = annotation.sess(); pprust_hir::print_crate(sess.codemap(), sess.diagnostic(), krate, src_name.to_string(), &mut rdr, out, annotation.pp_ann(), is_expanded) }) } (PpmHir(s), Some(uii)) => { let out: &mut Write = &mut out; s.call_with_pp_support_hir(&sess, cstore, &ast_map.unwrap(), &arenas, &id, (out,uii), |annotation, (out,uii), _| { debug!("pretty printing source code {:?}", s); let sess = annotation.sess(); let ast_map = annotation.ast_map().expect("--pretty missing ast_map"); let mut pp_state = pprust_hir::State::new_from_input(sess.codemap(), sess.diagnostic(), src_name.to_string(), &mut rdr, box out, annotation.pp_ann(), true, Some(ast_map.krate())); for node_id in uii.all_matching_node_ids(ast_map) { let node = ast_map.get(node_id); try!(pp_state.print_node(&node)); try!(pp::space(&mut pp_state.s)); try!(pp_state.synth_comment(ast_map.path_to_string(node_id))); try!(pp::hardbreak(&mut pp_state.s)); } pp::eof(&mut pp_state.s) }) } (PpmMir, None) => { debug!("pretty printing MIR for whole crate"); let ast_map = ast_map.expect("--unpretty mir missing ast_map"); abort_on_err(driver::phase_3_run_analysis_passes(&sess, &cstore, ast_map, &arenas, &id, resolve::MakeGlobMap::No, |tcx, mir_map, _, _| { if let Some(mir_map) = mir_map { for (nodeid, mir) in &mir_map.map { try!(writeln!(out, "MIR for {}", tcx.map.node_to_string(*nodeid))); try!(write_mir_pretty(mir, &mut out)); } } Ok(()) }), &sess) } (PpmMir, Some(uii)) => { debug!("pretty printing MIR for {:?}", uii); let ast_map = ast_map.expect("--unpretty mir missing ast_map"); let nodeid = uii.to_one_node_id("--unpretty", &sess, &ast_map); abort_on_err(driver::phase_3_run_analysis_passes(&sess, &cstore, ast_map, &arenas, &id, resolve::MakeGlobMap::No, |tcx, mir_map, _, _| { if let Some(mir_map) = mir_map { try!(writeln!(out, "MIR for {}", tcx.map.node_to_string(nodeid))); let mir = mir_map.map.get(&nodeid).unwrap_or_else(|| { sess.fatal(&format!("no MIR map entry for node {}", nodeid)) }); try!(write_mir_pretty(mir, &mut out)); } Ok(()) }), &sess) } (PpmFlowGraph(mode), opt_uii) => { debug!("pretty printing flow graph for {:?}", opt_uii); let uii = opt_uii.unwrap_or_else(|| { sess.fatal(&format!("`pretty flowgraph=..` needs NodeId (int) or \ unique path suffix (b::c::d)")) }); let ast_map = ast_map.expect("--pretty flowgraph missing ast_map"); let nodeid = uii.to_one_node_id("--pretty", &sess, &ast_map); let node = ast_map.find(nodeid).unwrap_or_else(|| { sess.fatal(&format!("--pretty flowgraph couldn't find id: {}", nodeid)) }); let code = blocks::Code::from_node(node); let out: &mut Write = &mut out; match code { Some(code) => { let variants = gather_flowgraph_variants(&sess); abort_on_err(driver::phase_3_run_analysis_passes(&sess, &cstore, ast_map, &arenas, &id, resolve::MakeGlobMap::No, |tcx, _, _, _| { print_flowgraph(variants, tcx, code, mode, out) }), &sess) } None => { let message = format!("--pretty=flowgraph needs block, fn, or method; got \ {:?}", node); // point to what was found, if there's an // accessible span. match ast_map.opt_span(nodeid) { Some(sp) => sess.span_fatal(sp, &message[..]), None => sess.fatal(&message[..]), } } } } } .unwrap(); match ofile { None => print!("{}", String::from_utf8(out).unwrap()), Some(p) => { match File::create(&p) { Ok(mut w) => w.write_all(&out).unwrap(), Err(e) => panic!("print-print failed to open {} due to {}", p.display(), e), } } } } fn print_flowgraph(variants: Vec, tcx: &ty::ctxt, code: blocks::Code, mode: PpFlowGraphMode, mut out: W) -> io::Result<()> { let cfg = match code { blocks::BlockCode(block) => cfg::CFG::new(tcx, &block), blocks::FnLikeCode(fn_like) => cfg::CFG::new(tcx, &fn_like.body()), }; let labelled_edges = mode != PpFlowGraphMode::UnlabelledEdges; let lcfg = LabelledCFG { ast_map: &tcx.map, cfg: &cfg, name: format!("node_{}", code.id()), labelled_edges: labelled_edges, }; match code { _ if variants.is_empty() => { let r = dot::render(&lcfg, &mut out); return expand_err_details(r); } blocks::BlockCode(_) => { tcx.sess.err("--pretty flowgraph with -Z flowgraph-print annotations requires \ fn-like node id."); return Ok(()); } blocks::FnLikeCode(fn_like) => { let (bccx, analysis_data) = borrowck::build_borrowck_dataflow_data_for_fn(tcx, fn_like.to_fn_parts(), &cfg); let lcfg = borrowck_dot::DataflowLabeller { inner: lcfg, variants: variants, borrowck_ctxt: &bccx, analysis_data: &analysis_data, }; let r = dot::render(&lcfg, &mut out); return expand_err_details(r); } } fn expand_err_details(r: io::Result<()>) -> io::Result<()> { r.map_err(|ioerr| { io::Error::new(io::ErrorKind::Other, &format!("graphviz::render failed: {}", ioerr)[..]) }) } }