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use borrow_check::location::{LocationIndex, LocationTable};
use dataflow::indexes::BorrowIndex;
use polonius_engine::AllFacts as PoloniusAllFacts;
use polonius_engine::Atom;
use rustc::ty::{RegionVid, TyCtxt};
use rustc_data_structures::indexed_vec::Idx;
use std::error::Error;
use std::fmt::Debug;
use std::fs::{self, File};
use std::io::Write;
use std::path::Path;
crate type AllFacts = PoloniusAllFacts<RegionVid, BorrowIndex, LocationIndex>;
crate trait AllFactsExt {
fn enabled(tcx: TyCtxt<'_, '_, '_>) -> bool;
fn write_to_dir(
&self,
dir: impl AsRef<Path>,
location_table: &LocationTable,
) -> Result<(), Box<dyn Error>>;
}
impl AllFactsExt for AllFacts {
fn enabled(tcx: TyCtxt<'_, '_, '_>) -> bool {
tcx.sess.opts.debugging_opts.nll_facts
|| tcx.sess.opts.debugging_opts.polonius
}
fn write_to_dir(
&self,
dir: impl AsRef<Path>,
location_table: &LocationTable,
) -> Result<(), Box<dyn Error>> {
let dir: &Path = dir.as_ref();
fs::create_dir_all(dir)?;
let wr = FactWriter { location_table, dir };
macro_rules! write_facts_to_path {
($wr:ident . write_facts_to_path($this:ident . [
$($field:ident,)*
])) => {
$(
$wr.write_facts_to_path(
&$this.$field,
&format!("{}.facts", stringify!($field))
)?;
)*
}
}
write_facts_to_path! {
wr.write_facts_to_path(self.[
borrow_region,
universal_region,
cfg_edge,
killed,
outlives,
region_live_at,
invalidates,
])
}
Ok(())
}
}
impl Atom for BorrowIndex {
fn index(self) -> usize {
Idx::index(self)
}
}
impl From<usize> for BorrowIndex {
fn from(i: usize) -> BorrowIndex {
BorrowIndex::new(i)
}
}
impl From<BorrowIndex> for usize {
fn from(vid: BorrowIndex) -> usize {
Idx::index(vid)
}
}
impl Atom for LocationIndex {
fn index(self) -> usize {
Idx::index(self)
}
}
impl From<usize> for LocationIndex {
fn from(i: usize) -> LocationIndex {
LocationIndex::new(i)
}
}
impl From<LocationIndex> for usize {
fn from(vid: LocationIndex) -> usize {
Idx::index(vid)
}
}
struct FactWriter<'w> {
location_table: &'w LocationTable,
dir: &'w Path,
}
impl<'w> FactWriter<'w> {
fn write_facts_to_path<T>(
&self,
rows: &[T],
file_name: &str,
) -> Result<(), Box<dyn Error>>
where
T: FactRow,
{
let file = &self.dir.join(file_name);
let mut file = File::create(file)?;
for row in rows {
row.write(&mut file, self.location_table)?;
}
Ok(())
}
}
trait FactRow {
fn write(
&self,
out: &mut File,
location_table: &LocationTable,
) -> Result<(), Box<dyn Error>>;
}
impl FactRow for RegionVid {
fn write(
&self,
out: &mut File,
location_table: &LocationTable,
) -> Result<(), Box<dyn Error>> {
write_row(out, location_table, &[self])
}
}
impl<A, B> FactRow for (A, B)
where
A: FactCell,
B: FactCell,
{
fn write(
&self,
out: &mut File,
location_table: &LocationTable,
) -> Result<(), Box<dyn Error>> {
write_row(out, location_table, &[&self.0, &self.1])
}
}
impl<A, B, C> FactRow for (A, B, C)
where
A: FactCell,
B: FactCell,
C: FactCell,
{
fn write(
&self,
out: &mut File,
location_table: &LocationTable,
) -> Result<(), Box<dyn Error>> {
write_row(out, location_table, &[&self.0, &self.1, &self.2])
}
}
impl<A, B, C, D> FactRow for (A, B, C, D)
where
A: FactCell,
B: FactCell,
C: FactCell,
D: FactCell,
{
fn write(
&self,
out: &mut File,
location_table: &LocationTable,
) -> Result<(), Box<dyn Error>> {
write_row(out, location_table, &[&self.0, &self.1, &self.2, &self.3])
}
}
fn write_row(
out: &mut dyn Write,
location_table: &LocationTable,
columns: &[&dyn FactCell],
) -> Result<(), Box<dyn Error>> {
for (index, c) in columns.iter().enumerate() {
let tail = if index == columns.len() - 1 {
"\n"
} else {
"\t"
};
write!(out, "{:?}{}", c.to_string(location_table), tail)?;
}
Ok(())
}
trait FactCell {
fn to_string(&self, location_table: &LocationTable) -> String;
}
impl<A: Debug> FactCell for A {
default fn to_string(&self, _location_table: &LocationTable) -> String {
format!("{:?}", self)
}
}
impl FactCell for LocationIndex {
fn to_string(&self, location_table: &LocationTable) -> String {
format!("{:?}", location_table.to_location(*self))
}
}