687 lines
23 KiB
Rust
687 lines
23 KiB
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//! The various pretty print routines.
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pub use self::UserIdentifiedItem::*;
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pub use self::PpSourceMode::*;
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pub use self::PpMode::*;
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use self::NodesMatchingUII::*;
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use rustc_trans::back::link;
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use driver;
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use rustc::middle::ty;
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use rustc::middle::cfg;
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use rustc::middle::cfg::graphviz::LabelledCFG;
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use rustc::session::Session;
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use rustc::session::config::{self, Input};
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use rustc::util::ppaux;
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use rustc_borrowck as borrowck;
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use rustc_borrowck::graphviz as borrowck_dot;
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use syntax::ast;
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use syntax::ast_map::{self, blocks, NodePrinter};
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use syntax::codemap;
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use syntax::fold::{self, Folder};
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use syntax::print::{pp, pprust};
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use syntax::ptr::P;
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use graphviz as dot;
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use std::io::{self, MemReader};
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use std::option;
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use std::str::FromStr;
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#[derive(Copy, PartialEq, Show)]
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pub enum PpSourceMode {
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PpmNormal,
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PpmEveryBodyLoops,
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PpmExpanded,
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PpmTyped,
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PpmIdentified,
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PpmExpandedIdentified,
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PpmExpandedHygiene,
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}
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#[derive(Copy, PartialEq, Show)]
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pub enum PpMode {
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PpmSource(PpSourceMode),
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PpmFlowGraph,
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}
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pub fn parse_pretty(sess: &Session,
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name: &str,
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extended: bool) -> (PpMode, Option<UserIdentifiedItem>) {
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let mut split = name.splitn(1, '=');
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let first = split.next().unwrap();
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let opt_second = split.next();
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let first = match (first, extended) {
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("normal", _) => PpmSource(PpmNormal),
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("everybody_loops", true) => PpmSource(PpmEveryBodyLoops),
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("expanded", _) => PpmSource(PpmExpanded),
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("typed", _) => PpmSource(PpmTyped),
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("expanded,identified", _) => PpmSource(PpmExpandedIdentified),
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("expanded,hygiene", _) => PpmSource(PpmExpandedHygiene),
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("identified", _) => PpmSource(PpmIdentified),
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("flowgraph", true) => PpmFlowGraph,
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_ => {
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if extended {
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sess.fatal(format!(
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"argument to `xpretty` must be one of `normal`, \
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`expanded`, `flowgraph=<nodeid>`, `typed`, `identified`, \
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`expanded,identified`, or `everybody_loops`; got {}", name).as_slice());
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} else {
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sess.fatal(format!(
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"argument to `pretty` must be one of `normal`, \
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`expanded`, `typed`, `identified`, \
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or `expanded,identified`; got {}", name).as_slice());
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}
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}
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};
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let opt_second = opt_second.and_then(|s| s.parse::<UserIdentifiedItem>());
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(first, opt_second)
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}
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// This slightly awkward construction is to allow for each PpMode to
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// choose whether it needs to do analyses (which can consume the
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// Session) and then pass through the session (now attached to the
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// analysis results) on to the chosen pretty-printer, along with the
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// `&PpAnn` object.
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//
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// Note that since the `&PrinterSupport` is freshly constructed on each
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// call, it would not make sense to try to attach the lifetime of `self`
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// to the lifetime of the `&PrinterObject`.
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//
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// (The `use_once_payload` is working around the current lack of once
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// functions in the compiler.)
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impl PpSourceMode {
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/// Constructs a `PrinterSupport` object and passes it to `f`.
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fn call_with_pp_support<'tcx, A, B, F>(&self,
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sess: Session,
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ast_map: Option<ast_map::Map<'tcx>>,
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arenas: &'tcx ty::CtxtArenas<'tcx>,
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id: String,
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payload: B,
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f: F) -> A where
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F: FnOnce(&PrinterSupport, B) -> A,
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{
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match *self {
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PpmNormal | PpmEveryBodyLoops | PpmExpanded => {
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let annotation = NoAnn { sess: sess, ast_map: ast_map };
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f(&annotation, payload)
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}
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PpmIdentified | PpmExpandedIdentified => {
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let annotation = IdentifiedAnnotation { sess: sess, ast_map: ast_map };
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f(&annotation, payload)
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}
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PpmExpandedHygiene => {
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let annotation = HygieneAnnotation { sess: sess, ast_map: ast_map };
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f(&annotation, payload)
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}
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PpmTyped => {
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let ast_map = ast_map.expect("--pretty=typed missing ast_map");
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let analysis = driver::phase_3_run_analysis_passes(sess, ast_map, arenas, id);
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let annotation = TypedAnnotation { analysis: analysis };
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f(&annotation, payload)
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}
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}
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}
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}
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trait PrinterSupport<'ast>: pprust::PpAnn {
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/// Provides a uniform interface for re-extracting a reference to a
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/// `Session` from a value that now owns it.
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fn sess<'a>(&'a self) -> &'a Session;
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/// Provides a uniform interface for re-extracting a reference to an
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/// `ast_map::Map` from a value that now owns it.
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fn ast_map<'a>(&'a self) -> Option<&'a ast_map::Map<'ast>>;
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/// Produces the pretty-print annotation object.
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///
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/// (Rust does not yet support upcasting from a trait object to
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/// an object for one of its super-traits.)
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fn pp_ann<'a>(&'a self) -> &'a pprust::PpAnn;
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}
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struct NoAnn<'ast> {
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sess: Session,
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ast_map: Option<ast_map::Map<'ast>>
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}
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impl<'ast> PrinterSupport<'ast> for NoAnn<'ast> {
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fn sess<'a>(&'a self) -> &'a Session { &self.sess }
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fn ast_map<'a>(&'a self) -> Option<&'a ast_map::Map<'ast>> {
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self.ast_map.as_ref()
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}
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fn pp_ann<'a>(&'a self) -> &'a pprust::PpAnn { self }
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}
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impl<'ast> pprust::PpAnn for NoAnn<'ast> {}
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struct IdentifiedAnnotation<'ast> {
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sess: Session,
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ast_map: Option<ast_map::Map<'ast>>,
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}
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impl<'ast> PrinterSupport<'ast> for IdentifiedAnnotation<'ast> {
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fn sess<'a>(&'a self) -> &'a Session { &self.sess }
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fn ast_map<'a>(&'a self) -> Option<&'a ast_map::Map<'ast>> {
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self.ast_map.as_ref()
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}
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fn pp_ann<'a>(&'a self) -> &'a pprust::PpAnn { self }
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}
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impl<'ast> pprust::PpAnn for IdentifiedAnnotation<'ast> {
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fn pre(&self,
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s: &mut pprust::State,
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node: pprust::AnnNode) -> io::IoResult<()> {
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match node {
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pprust::NodeExpr(_) => s.popen(),
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_ => Ok(())
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}
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}
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fn post(&self,
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s: &mut pprust::State,
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node: pprust::AnnNode) -> io::IoResult<()> {
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match node {
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pprust::NodeIdent(_) | pprust::NodeName(_) => Ok(()),
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pprust::NodeItem(item) => {
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try!(pp::space(&mut s.s));
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s.synth_comment(item.id.to_string())
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}
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pprust::NodeBlock(blk) => {
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try!(pp::space(&mut s.s));
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s.synth_comment(format!("block {}", blk.id))
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}
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pprust::NodeExpr(expr) => {
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try!(pp::space(&mut s.s));
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try!(s.synth_comment(expr.id.to_string()));
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s.pclose()
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}
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pprust::NodePat(pat) => {
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try!(pp::space(&mut s.s));
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s.synth_comment(format!("pat {}", pat.id))
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}
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}
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}
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}
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struct HygieneAnnotation<'ast> {
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sess: Session,
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ast_map: Option<ast_map::Map<'ast>>,
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}
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impl<'ast> PrinterSupport<'ast> for HygieneAnnotation<'ast> {
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fn sess<'a>(&'a self) -> &'a Session { &self.sess }
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fn ast_map<'a>(&'a self) -> Option<&'a ast_map::Map<'ast>> {
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self.ast_map.as_ref()
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}
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fn pp_ann<'a>(&'a self) -> &'a pprust::PpAnn { self }
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}
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impl<'ast> pprust::PpAnn for HygieneAnnotation<'ast> {
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fn post(&self,
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s: &mut pprust::State,
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node: pprust::AnnNode) -> io::IoResult<()> {
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match node {
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pprust::NodeIdent(&ast::Ident { name: ast::Name(nm), ctxt }) => {
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try!(pp::space(&mut s.s));
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// FIXME #16420: this doesn't display the connections
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// between syntax contexts
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s.synth_comment(format!("{}#{}", nm, ctxt))
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}
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pprust::NodeName(&ast::Name(nm)) => {
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try!(pp::space(&mut s.s));
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s.synth_comment(nm.to_string())
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}
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_ => Ok(())
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}
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}
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}
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struct TypedAnnotation<'tcx> {
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analysis: ty::CrateAnalysis<'tcx>,
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}
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impl<'tcx> PrinterSupport<'tcx> for TypedAnnotation<'tcx> {
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fn sess<'a>(&'a self) -> &'a Session { &self.analysis.ty_cx.sess }
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fn ast_map<'a>(&'a self) -> Option<&'a ast_map::Map<'tcx>> {
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Some(&self.analysis.ty_cx.map)
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}
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fn pp_ann<'a>(&'a self) -> &'a pprust::PpAnn { self }
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}
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impl<'tcx> pprust::PpAnn for TypedAnnotation<'tcx> {
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fn pre(&self,
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s: &mut pprust::State,
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node: pprust::AnnNode) -> io::IoResult<()> {
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match node {
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pprust::NodeExpr(_) => s.popen(),
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_ => Ok(())
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}
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}
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fn post(&self,
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s: &mut pprust::State,
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node: pprust::AnnNode) -> io::IoResult<()> {
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let tcx = &self.analysis.ty_cx;
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match node {
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pprust::NodeExpr(expr) => {
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try!(pp::space(&mut s.s));
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try!(pp::word(&mut s.s, "as"));
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try!(pp::space(&mut s.s));
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try!(pp::word(&mut s.s,
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ppaux::ty_to_string(
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tcx,
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ty::expr_ty(tcx, expr)).index(&FullRange)));
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s.pclose()
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}
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_ => Ok(())
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}
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}
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}
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fn gather_flowgraph_variants(sess: &Session) -> Vec<borrowck_dot::Variant> {
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let print_loans = config::FLOWGRAPH_PRINT_LOANS;
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let print_moves = config::FLOWGRAPH_PRINT_MOVES;
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let print_assigns = config::FLOWGRAPH_PRINT_ASSIGNS;
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let print_all = config::FLOWGRAPH_PRINT_ALL;
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let opt = |&: print_which| sess.debugging_opt(print_which);
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let mut variants = Vec::new();
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if opt(print_all) || opt(print_loans) {
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variants.push(borrowck_dot::Loans);
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}
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if opt(print_all) || opt(print_moves) {
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variants.push(borrowck_dot::Moves);
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}
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if opt(print_all) || opt(print_assigns) {
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variants.push(borrowck_dot::Assigns);
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}
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variants
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}
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#[derive(Clone, Show)]
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pub enum UserIdentifiedItem {
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ItemViaNode(ast::NodeId),
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ItemViaPath(Vec<String>),
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}
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impl FromStr for UserIdentifiedItem {
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fn from_str(s: &str) -> Option<UserIdentifiedItem> {
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s.parse().map(ItemViaNode).or_else(|| {
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let v : Vec<_> = s.split_str("::")
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.map(|x|x.to_string())
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.collect();
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Some(ItemViaPath(v))
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})
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}
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}
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enum NodesMatchingUII<'a, 'ast: 'a> {
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NodesMatchingDirect(option::IntoIter<ast::NodeId>),
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NodesMatchingSuffix(ast_map::NodesMatchingSuffix<'a, 'ast>),
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}
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impl<'a, 'ast> Iterator for NodesMatchingUII<'a, 'ast> {
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type Item = ast::NodeId;
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fn next(&mut self) -> Option<ast::NodeId> {
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match self {
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&NodesMatchingDirect(ref mut iter) => iter.next(),
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&NodesMatchingSuffix(ref mut iter) => iter.next(),
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}
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}
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}
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impl UserIdentifiedItem {
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fn reconstructed_input(&self) -> String {
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match *self {
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ItemViaNode(node_id) => node_id.to_string(),
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ItemViaPath(ref parts) => parts.connect("::"),
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}
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}
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fn all_matching_node_ids<'a, 'ast>(&'a self, map: &'a ast_map::Map<'ast>)
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-> NodesMatchingUII<'a, 'ast> {
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match *self {
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ItemViaNode(node_id) =>
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NodesMatchingDirect(Some(node_id).into_iter()),
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ItemViaPath(ref parts) =>
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NodesMatchingSuffix(map.nodes_matching_suffix(parts.index(&FullRange))),
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}
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}
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fn to_one_node_id(self, user_option: &str, sess: &Session, map: &ast_map::Map) -> ast::NodeId {
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let fail_because = |&: is_wrong_because| -> ast::NodeId {
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let message =
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format!("{} needs NodeId (int) or unique \
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path suffix (b::c::d); got {}, which {}",
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user_option,
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self.reconstructed_input(),
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is_wrong_because);
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sess.fatal(message.index(&FullRange))
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};
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let mut saw_node = ast::DUMMY_NODE_ID;
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let mut seen = 0u;
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for node in self.all_matching_node_ids(map) {
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saw_node = node;
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seen += 1;
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if seen > 1 {
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fail_because("does not resolve uniquely");
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}
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}
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if seen == 0 {
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fail_because("does not resolve to any item");
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}
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assert!(seen == 1);
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return saw_node;
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}
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}
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fn needs_ast_map(ppm: &PpMode, opt_uii: &Option<UserIdentifiedItem>) -> bool {
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match *ppm {
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PpmSource(PpmNormal) |
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PpmSource(PpmEveryBodyLoops) |
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PpmSource(PpmIdentified) => opt_uii.is_some(),
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PpmSource(PpmExpanded) |
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PpmSource(PpmExpandedIdentified) |
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PpmSource(PpmExpandedHygiene) |
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PpmSource(PpmTyped) |
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PpmFlowGraph => true
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}
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}
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fn needs_expansion(ppm: &PpMode) -> bool {
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match *ppm {
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PpmSource(PpmNormal) |
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PpmSource(PpmEveryBodyLoops) |
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PpmSource(PpmIdentified) => false,
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PpmSource(PpmExpanded) |
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PpmSource(PpmExpandedIdentified) |
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PpmSource(PpmExpandedHygiene) |
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PpmSource(PpmTyped) |
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PpmFlowGraph => true
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}
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}
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struct ReplaceBodyWithLoop {
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within_static_or_const: bool,
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}
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impl ReplaceBodyWithLoop {
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fn new() -> ReplaceBodyWithLoop {
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ReplaceBodyWithLoop { within_static_or_const: false }
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}
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}
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impl fold::Folder for ReplaceBodyWithLoop {
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fn fold_item_underscore(&mut self, i: ast::Item_) -> ast::Item_ {
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match i {
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ast::ItemStatic(..) | ast::ItemConst(..) => {
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self.within_static_or_const = true;
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let ret = fold::noop_fold_item_underscore(i, self);
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self.within_static_or_const = false;
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return ret;
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}
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_ => {
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fold::noop_fold_item_underscore(i, self)
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}
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}
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}
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fn fold_block(&mut self, b: P<ast::Block>) -> P<ast::Block> {
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fn expr_to_block(rules: ast::BlockCheckMode,
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e: Option<P<ast::Expr>>) -> P<ast::Block> {
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P(ast::Block {
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expr: e,
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view_items: vec![], stmts: vec![], rules: rules,
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id: ast::DUMMY_NODE_ID, span: codemap::DUMMY_SP,
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})
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}
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if !self.within_static_or_const {
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let empty_block = expr_to_block(ast::DefaultBlock, None);
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let loop_expr = P(ast::Expr {
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node: ast::ExprLoop(empty_block, None),
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id: ast::DUMMY_NODE_ID, span: codemap::DUMMY_SP
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});
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expr_to_block(b.rules, Some(loop_expr))
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} else {
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fold::noop_fold_block(b, self)
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}
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}
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// in general the pretty printer processes unexpanded code, so
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// we override the default `fold_mac` method which panics.
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fn fold_mac(&mut self, mac: ast::Mac) -> ast::Mac {
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fold::noop_fold_mac(mac, self)
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}
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}
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pub fn pretty_print_input(sess: Session,
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cfg: ast::CrateConfig,
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input: &Input,
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ppm: PpMode,
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opt_uii: Option<UserIdentifiedItem>,
|
|
ofile: Option<Path>) {
|
|
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.as_slice(), 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, krate, id.index(&FullRange), None) {
|
|
None => return,
|
|
Some(k) => k
|
|
}
|
|
} else {
|
|
krate
|
|
};
|
|
|
|
let mut forest = ast_map::Forest::new(krate);
|
|
let arenas = ty::CtxtArenas::new();
|
|
|
|
let (krate, ast_map) = if compute_ast_map {
|
|
let map = driver::assign_node_ids_and_map(&sess, &mut forest);
|
|
(map.krate(), Some(map))
|
|
} else {
|
|
(forest.krate(), None)
|
|
};
|
|
|
|
let src_name = driver::source_name(input);
|
|
let src = sess.codemap().get_filemap(src_name.index(&FullRange))
|
|
.src.as_bytes().to_vec();
|
|
let mut rdr = MemReader::new(src);
|
|
|
|
let out = match ofile {
|
|
None => box io::stdout() as Box<Writer+'static>,
|
|
Some(p) => {
|
|
let r = io::File::create(&p);
|
|
match r {
|
|
Ok(w) => box w as Box<Writer+'static>,
|
|
Err(e) => panic!("print-print failed to open {} due to {}",
|
|
p.display(), e),
|
|
}
|
|
}
|
|
};
|
|
|
|
match (ppm, opt_uii) {
|
|
(PpmSource(s), None) =>
|
|
s.call_with_pp_support(
|
|
sess, ast_map, &arenas, id, 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)
|
|
}),
|
|
|
|
(PpmSource(s), Some(uii)) =>
|
|
s.call_with_pp_support(
|
|
sess, ast_map, &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::State::new_from_input(sess.codemap(),
|
|
sess.diagnostic(),
|
|
src_name.to_string(),
|
|
&mut rdr,
|
|
out,
|
|
annotation.pp_ann(),
|
|
is_expanded);
|
|
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)
|
|
}),
|
|
|
|
(PpmFlowGraph, 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)").index(&FullRange))
|
|
|
|
});
|
|
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).index(&FullRange))
|
|
});
|
|
|
|
let code = blocks::Code::from_node(node);
|
|
match code {
|
|
Some(code) => {
|
|
let variants = gather_flowgraph_variants(&sess);
|
|
let analysis = driver::phase_3_run_analysis_passes(sess, ast_map, &arenas, id);
|
|
print_flowgraph(variants, analysis, code, 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 ast_map.opt_span(nodeid) {
|
|
Some(sp) => sess.span_fatal(sp, message.index(&FullRange)),
|
|
None => sess.fatal(message.index(&FullRange))
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}.unwrap()
|
|
}
|
|
|
|
fn print_flowgraph<W:io::Writer>(variants: Vec<borrowck_dot::Variant>,
|
|
analysis: ty::CrateAnalysis,
|
|
code: blocks::Code,
|
|
mut out: W) -> io::IoResult<()> {
|
|
let ty_cx = &analysis.ty_cx;
|
|
let cfg = match code {
|
|
blocks::BlockCode(block) => cfg::CFG::new(ty_cx, &*block),
|
|
blocks::FnLikeCode(fn_like) => cfg::CFG::new(ty_cx, &*fn_like.body()),
|
|
};
|
|
|
|
match code {
|
|
_ if variants.len() == 0 => {
|
|
let lcfg = LabelledCFG {
|
|
ast_map: &ty_cx.map,
|
|
cfg: &cfg,
|
|
name: format!("node_{}", code.id()),
|
|
};
|
|
let r = dot::render(&lcfg, &mut out);
|
|
return expand_err_details(r);
|
|
}
|
|
blocks::BlockCode(_) => {
|
|
ty_cx.sess.err("--pretty flowgraph with -Z flowgraph-print \
|
|
annotations requires fn-like node id.");
|
|
return Ok(())
|
|
}
|
|
blocks::FnLikeCode(fn_like) => {
|
|
let fn_parts = borrowck::FnPartsWithCFG::from_fn_like(&fn_like, &cfg);
|
|
let (bccx, analysis_data) =
|
|
borrowck::build_borrowck_dataflow_data_for_fn(ty_cx, fn_parts);
|
|
|
|
let lcfg = LabelledCFG {
|
|
ast_map: &ty_cx.map,
|
|
cfg: &cfg,
|
|
name: format!("node_{}", code.id()),
|
|
};
|
|
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::IoResult<()>) -> io::IoResult<()> {
|
|
r.map_err(|ioerr| {
|
|
let orig_detail = ioerr.detail.clone();
|
|
let m = "graphviz::render failed";
|
|
io::IoError {
|
|
detail: Some(match orig_detail {
|
|
None => m.to_string(),
|
|
Some(d) => format!("{}: {}", m, d)
|
|
}),
|
|
..ioerr
|
|
}
|
|
})
|
|
}
|
|
}
|