rust/src/librustc_driver/pretty.rs
Niko Matsakis 6bd80d1116 compute and cache HIR hashes at beginning
This avoids the compile-time overhead of computing them twice.  It also fixes
an issue where the hash computed after typeck is differen than the hash before,
because typeck mutates the def-map in place.

Fixes #35549.
Fixes #35593.
2016-08-20 07:26:14 -04:00

1023 lines
36 KiB
Rust

// 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 <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.
//! The various pretty print routines.
pub use self::UserIdentifiedItem::*;
pub use self::PpSourceMode::*;
pub use self::PpMode::*;
use self::NodesMatchingUII::*;
use abort_on_err;
use driver::{self, Resolutions};
use rustc::ty::{self, TyCtxt};
use rustc::cfg;
use rustc::cfg::graphviz::LabelledCFG;
use rustc::dep_graph::DepGraph;
use rustc::session::Session;
use rustc::session::config::Input;
use rustc_borrowck as borrowck;
use rustc_borrowck::graphviz as borrowck_dot;
use rustc_mir::pretty::write_mir_pretty;
use rustc_mir::graphviz::write_mir_graphviz;
use syntax::ast::{self, BlockCheckMode};
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 syntax_pos;
use graphviz as dot;
use std::fs::File;
use std::io::{self, Write};
use std::iter;
use std::option;
use std::path::Path;
use std::str::FromStr;
use rustc::hir::map as hir_map;
use rustc::hir::map::{blocks, NodePrinter};
use rustc::hir;
use rustc::hir::print as pprust_hir;
use rustc::mir::mir_map::MirMap;
#[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,
PpmMirCFG,
}
impl PpMode {
pub fn needs_ast_map(&self, opt_uii: &Option<UserIdentifiedItem>) -> bool {
match *self {
PpmSource(PpmNormal) |
PpmSource(PpmEveryBodyLoops) |
PpmSource(PpmIdentified) => opt_uii.is_some(),
PpmSource(PpmExpanded) |
PpmSource(PpmExpandedIdentified) |
PpmSource(PpmExpandedHygiene) |
PpmHir(_) |
PpmMir |
PpmMirCFG |
PpmFlowGraph(_) => true,
PpmSource(PpmTyped) => panic!("invalid state"),
}
}
pub fn needs_analysis(&self) -> bool {
match *self {
PpmMir | PpmMirCFG | PpmFlowGraph(_) => true,
_ => false,
}
}
}
pub fn parse_pretty(sess: &Session,
name: &str,
extended: bool)
-> (PpMode, Option<UserIdentifiedItem>) {
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,
("mir-cfg", true) => PpmMirCFG,
("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]=<nodeid>`, \
`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::<UserIdentifiedItem>().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<&hir_map::Map<'tcx>>,
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.map(|m| m.clone()),
};
f(&annotation, payload)
}
PpmIdentified | PpmExpandedIdentified => {
let annotation = IdentifiedAnnotation {
sess: sess,
ast_map: ast_map.map(|m| m.clone()),
};
f(&annotation, payload)
}
PpmExpandedHygiene => {
let annotation = HygieneAnnotation {
sess: sess,
ast_map: ast_map.map(|m| m.clone()),
};
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,
ast_map: &hir_map::Map<'tcx>,
analysis: &ty::CrateAnalysis,
resolutions: &Resolutions,
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,
ast_map.clone(),
analysis.clone(),
resolutions.clone(),
arenas,
id,
|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;
/// Computes an user-readable representation of a path, if possible.
fn node_path(&self, id: ast::NodeId) -> Option<String> {
self.ast_map().and_then(|map| map.def_path_from_id(id)).map(|path| {
path.data.into_iter().map(|elem| {
elem.data.to_string()
}).collect::<Vec<_>>().join("::")
})
}
}
struct NoAnn<'ast> {
sess: &'ast Session,
ast_map: Option<hir_map::Map<'ast>>,
}
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<hir_map::Map<'ast>>,
}
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) => {
pp::space(&mut s.s)?;
s.synth_comment(item.id.to_string())
}
pprust::NodeSubItem(id) => {
pp::space(&mut s.s)?;
s.synth_comment(id.to_string())
}
pprust::NodeBlock(blk) => {
pp::space(&mut s.s)?;
s.synth_comment(format!("block {}", blk.id))
}
pprust::NodeExpr(expr) => {
pp::space(&mut s.s)?;
s.synth_comment(expr.id.to_string())?;
s.pclose()
}
pprust::NodePat(pat) => {
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) => {
pp::space(&mut s.s)?;
s.synth_comment(item.id.to_string())
}
pprust_hir::NodeSubItem(id) => {
pp::space(&mut s.s)?;
s.synth_comment(id.to_string())
}
pprust_hir::NodeBlock(blk) => {
pp::space(&mut s.s)?;
s.synth_comment(format!("block {}", blk.id))
}
pprust_hir::NodeExpr(expr) => {
pp::space(&mut s.s)?;
s.synth_comment(expr.id.to_string())?;
s.pclose()
}
pprust_hir::NodePat(pat) => {
pp::space(&mut s.s)?;
s.synth_comment(format!("pat {}", pat.id))
}
}
}
}
struct HygieneAnnotation<'ast> {
sess: &'ast Session,
ast_map: Option<hir_map::Map<'ast>>,
}
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 }) => {
pp::space(&mut s.s)?;
// FIXME #16420: this doesn't display the connections
// between syntax contexts
s.synth_comment(format!("{}{:?}", nm, ctxt))
}
pprust::NodeName(&ast::Name(nm)) => {
pp::space(&mut s.s)?;
s.synth_comment(nm.to_string())
}
_ => Ok(()),
}
}
}
struct TypedAnnotation<'a, 'tcx: 'a> {
tcx: TyCtxt<'a, 'tcx, '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
}
fn node_path(&self, id: ast::NodeId) -> Option<String> {
Some(self.tcx.node_path_str(id))
}
}
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) => {
pp::space(&mut s.s)?;
pp::word(&mut s.s, "as")?;
pp::space(&mut s.s)?;
pp::word(&mut s.s, &self.tcx.expr_ty(expr).to_string())?;
s.pclose()
}
_ => Ok(()),
}
}
}
fn gather_flowgraph_variants(sess: &Session) -> Vec<borrowck_dot::Variant> {
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<String>),
}
impl FromStr for UserIdentifiedItem {
type Err = ();
fn from_str(s: &str) -> Result<UserIdentifiedItem, ()> {
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<ast::NodeId>),
NodesMatchingSuffix(hir_map::NodesMatchingSuffix<'a, 'ast>),
}
impl<'a, 'ast> Iterator for NodesMatchingUII<'a, 'ast> {
type Item = ast::NodeId;
fn next(&mut self) -> Option<ast::NodeId> {
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;
}
}
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<ast::TraitItem> {
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<ast::ImplItem> {
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<ast::Block>) -> P<ast::Block> {
fn expr_to_block(rules: ast::BlockCheckMode, e: Option<P<ast::Expr>>) -> P<ast::Block> {
P(ast::Block {
stmts: e.map(|e| ast::Stmt {
id: ast::DUMMY_NODE_ID,
span: e.span,
node: ast::StmtKind::Expr(e),
}).into_iter().collect(),
rules: rules,
id: ast::DUMMY_NODE_ID,
span: syntax_pos::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: syntax_pos::DUMMY_SP,
attrs: ast::ThinVec::new(),
});
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)
}
}
fn print_flowgraph<'a, 'tcx, W: Write>(variants: Vec<borrowck_dot::Variant>,
tcx: TyCtxt<'a, 'tcx, 'tcx>,
mir_map: Option<&MirMap<'tcx>>,
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,
mir_map,
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)[..])
})
}
}
pub fn fold_crate(krate: ast::Crate, ppm: PpMode) -> ast::Crate {
if let PpmSource(PpmEveryBodyLoops) = ppm {
let mut fold = ReplaceBodyWithLoop::new();
fold.fold_crate(krate)
} else {
krate
}
}
fn get_source(input: &Input, sess: &Session) -> (Vec<u8>, String) {
let src_name = driver::source_name(input);
let src = sess.codemap()
.get_filemap(&src_name)
.unwrap()
.src
.as_ref()
.unwrap()
.as_bytes()
.to_vec();
(src, src_name)
}
fn write_output(out: Vec<u8>, ofile: Option<&Path>) {
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),
}
}
}
}
pub fn print_after_parsing(sess: &Session,
input: &Input,
krate: &ast::Crate,
ppm: PpMode,
ofile: Option<&Path>) {
let dep_graph = DepGraph::new(false);
let _ignore = dep_graph.in_ignore();
let (src, src_name) = get_source(input, sess);
let mut rdr = &*src;
let mut out = Vec::new();
if let PpmSource(s) = ppm {
// Silently ignores an identified node.
let out: &mut Write = &mut out;
s.call_with_pp_support(sess, None, 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(),
false)
}).unwrap()
} else {
unreachable!();
};
write_output(out, ofile);
}
pub fn print_after_hir_lowering<'tcx, 'a: 'tcx>(sess: &'a Session,
ast_map: &hir_map::Map<'tcx>,
analysis: &ty::CrateAnalysis,
resolutions: &Resolutions,
input: &Input,
krate: &ast::Crate,
crate_name: &str,
ppm: PpMode,
arenas: &'tcx ty::CtxtArenas<'tcx>,
opt_uii: Option<UserIdentifiedItem>,
ofile: Option<&Path>) {
let dep_graph = DepGraph::new(false);
let _ignore = dep_graph.in_ignore();
if ppm.needs_analysis() {
print_with_analysis(sess, ast_map, analysis, resolutions,
crate_name, arenas, ppm, opt_uii, ofile);
return;
}
let (src, src_name) = get_source(input, sess);
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, Some(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(),
true)
})
}
(PpmHir(s), None) => {
let out: &mut Write = &mut out;
s.call_with_pp_support_hir(sess,
ast_map,
analysis,
resolutions,
arenas,
crate_name,
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(),
true)
})
}
(PpmHir(s), Some(uii)) => {
let out: &mut Write = &mut out;
s.call_with_pp_support_hir(sess,
ast_map,
analysis,
resolutions,
arenas,
crate_name,
(out,uii),
|annotation, (out,uii), _| {
debug!("pretty printing source code {:?}", s);
let sess = annotation.sess();
let ast_map = annotation.ast_map().expect("--unpretty missing HIR 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);
pp_state.print_node(&node)?;
pp::space(&mut pp_state.s)?;
let path = annotation.node_path(node_id)
.expect("--unpretty missing node paths");
pp_state.synth_comment(path)?;
pp::hardbreak(&mut pp_state.s)?;
}
pp::eof(&mut pp_state.s)
})
}
_ => unreachable!(),
}.unwrap();
write_output(out, ofile);
}
// In an ideal world, this would be a public function called by the driver after
// analsysis is performed. However, we want to call `phase_3_run_analysis_passes`
// with a different callback than the standard driver, so that isn't easy.
// Instead, we call that function ourselves.
fn print_with_analysis<'tcx, 'a: 'tcx>(sess: &'a Session,
ast_map: &hir_map::Map<'tcx>,
analysis: &ty::CrateAnalysis,
resolutions: &Resolutions,
crate_name: &str,
arenas: &'tcx ty::CtxtArenas<'tcx>,
ppm: PpMode,
uii: Option<UserIdentifiedItem>,
ofile: Option<&Path>) {
let nodeid = if let Some(uii) = uii {
debug!("pretty printing for {:?}", uii);
Some(uii.to_one_node_id("--unpretty", sess, &ast_map))
} else {
debug!("pretty printing for whole crate");
None
};
let mut out = Vec::new();
abort_on_err(driver::phase_3_run_analysis_passes(sess,
ast_map.clone(),
analysis.clone(),
resolutions.clone(),
arenas,
crate_name,
|tcx, mir_map, _, _, _| {
match ppm {
PpmMir | PpmMirCFG => {
if let Some(mir_map) = mir_map {
if let Some(nodeid) = nodeid {
let def_id = tcx.map.local_def_id(nodeid);
match ppm {
PpmMir => write_mir_pretty(tcx, iter::once(def_id), &mir_map, &mut out),
PpmMirCFG => {
write_mir_graphviz(tcx, iter::once(def_id), &mir_map, &mut out)
}
_ => unreachable!(),
}?;
} else {
match ppm {
PpmMir => write_mir_pretty(tcx,
mir_map.map.keys().into_iter(),
&mir_map,
&mut out),
PpmMirCFG => write_mir_graphviz(tcx,
mir_map.map.keys().into_iter(),
&mir_map,
&mut out),
_ => unreachable!(),
}?;
}
}
Ok(())
}
PpmFlowGraph(mode) => {
let nodeid = nodeid.expect("`pretty flowgraph=..` needs NodeId (int) or \
unique path suffix (b::c::d)");
let node = tcx.map.find(nodeid).unwrap_or_else(|| {
tcx.sess.fatal(&format!("--pretty flowgraph couldn't find id: {}", nodeid))
});
let code = blocks::Code::from_node(node);
match code {
Some(code) => {
let variants = gather_flowgraph_variants(tcx.sess);
let out: &mut Write = &mut out;
print_flowgraph(variants,
tcx,
mir_map.as_ref(),
code,
mode,
out)
}
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 tcx.map.opt_span(nodeid) {
Some(sp) => tcx.sess.span_fatal(sp, &message),
None => tcx.sess.fatal(&message),
}
}
}
}
_ => unreachable!(),
}
}), sess).unwrap();
write_output(out, ofile);
}