mirror of
https://github.com/rust-lang/rust.git
synced 2026-05-16 04:55:22 +03:00
Dmitry Promsky
43a8f7b3e9
CodeMap.span_to_* perform a lookup of a BytePos(sp.hi), which lands into the next filemap if the last byte of range denoted by Span is also the last byte of the filemap, which results in ICEs or incorrect error reports.
Example:
````
pub fn main() {
let mut num = 3;
let refe = &mut num;
*refe = 5;
println!("{}", num);
}````
(note the empty line in the beginning and the absence of newline at the end)
The above would have caused ICE when trying to report where "refe" borrow ends.
The above without an empty line in the beginning would have reported borrow end to be the first line.
Most probably, this is also responsible for (at least some occurrences of) issue #8256.
The issue is fixed by always adding a newline at the end of non-empty filemaps in case there isn't a new line there already.
647 lines
20 KiB
Rust
647 lines
20 KiB
Rust
// Copyright 2012 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 CodeMap tracks all the source code used within a single crate, mapping
|
|
from integer byte positions to the original source code location. Each bit of
|
|
source parsed during crate parsing (typically files, in-memory strings, or
|
|
various bits of macro expansion) cover a continuous range of bytes in the
|
|
CodeMap and are represented by FileMaps. Byte positions are stored in `spans`
|
|
and used pervasively in the compiler. They are absolute positions within the
|
|
CodeMap, which upon request can be converted to line and column information,
|
|
source code snippets, etc.
|
|
|
|
*/
|
|
|
|
use std::cell::RefCell;
|
|
use std::cmp;
|
|
use std::vec_ng::Vec;
|
|
use serialize::{Encodable, Decodable, Encoder, Decoder};
|
|
|
|
pub trait Pos {
|
|
fn from_uint(n: uint) -> Self;
|
|
fn to_uint(&self) -> uint;
|
|
}
|
|
|
|
/// A byte offset. Keep this small (currently 32-bits), as AST contains
|
|
/// a lot of them.
|
|
#[deriving(Clone, Eq, Hash, Ord, Show)]
|
|
pub struct BytePos(u32);
|
|
|
|
/// A character offset. Because of multibyte utf8 characters, a byte offset
|
|
/// is not equivalent to a character offset. The CodeMap will convert BytePos
|
|
/// values to CharPos values as necessary.
|
|
#[deriving(Eq, Hash, Ord, Show)]
|
|
pub struct CharPos(uint);
|
|
|
|
// FIXME: Lots of boilerplate in these impls, but so far my attempts to fix
|
|
// have been unsuccessful
|
|
|
|
impl Pos for BytePos {
|
|
fn from_uint(n: uint) -> BytePos { BytePos(n as u32) }
|
|
fn to_uint(&self) -> uint { let BytePos(n) = *self; n as uint }
|
|
}
|
|
|
|
impl Add<BytePos, BytePos> for BytePos {
|
|
fn add(&self, rhs: &BytePos) -> BytePos {
|
|
BytePos((self.to_uint() + rhs.to_uint()) as u32)
|
|
}
|
|
}
|
|
|
|
impl Sub<BytePos, BytePos> for BytePos {
|
|
fn sub(&self, rhs: &BytePos) -> BytePos {
|
|
BytePos((self.to_uint() - rhs.to_uint()) as u32)
|
|
}
|
|
}
|
|
|
|
impl Pos for CharPos {
|
|
fn from_uint(n: uint) -> CharPos { CharPos(n) }
|
|
fn to_uint(&self) -> uint { let CharPos(n) = *self; n }
|
|
}
|
|
|
|
impl Add<CharPos,CharPos> for CharPos {
|
|
fn add(&self, rhs: &CharPos) -> CharPos {
|
|
CharPos(self.to_uint() + rhs.to_uint())
|
|
}
|
|
}
|
|
|
|
impl Sub<CharPos,CharPos> for CharPos {
|
|
fn sub(&self, rhs: &CharPos) -> CharPos {
|
|
CharPos(self.to_uint() - rhs.to_uint())
|
|
}
|
|
}
|
|
|
|
/**
|
|
Spans represent a region of code, used for error reporting. Positions in spans
|
|
are *absolute* positions from the beginning of the codemap, not positions
|
|
relative to FileMaps. Methods on the CodeMap can be used to relate spans back
|
|
to the original source.
|
|
*/
|
|
#[deriving(Clone, Show, Hash)]
|
|
pub struct Span {
|
|
lo: BytePos,
|
|
hi: BytePos,
|
|
expn_info: Option<@ExpnInfo>
|
|
}
|
|
|
|
pub static DUMMY_SP: Span = Span { lo: BytePos(0), hi: BytePos(0), expn_info: None };
|
|
|
|
#[deriving(Clone, Eq, Encodable, Decodable, Hash)]
|
|
pub struct Spanned<T> {
|
|
node: T,
|
|
span: Span,
|
|
}
|
|
|
|
impl cmp::Eq for Span {
|
|
fn eq(&self, other: &Span) -> bool {
|
|
return (*self).lo == (*other).lo && (*self).hi == (*other).hi;
|
|
}
|
|
fn ne(&self, other: &Span) -> bool { !(*self).eq(other) }
|
|
}
|
|
|
|
impl<S:Encoder> Encodable<S> for Span {
|
|
/* Note #1972 -- spans are encoded but not decoded */
|
|
fn encode(&self, s: &mut S) {
|
|
s.emit_nil()
|
|
}
|
|
}
|
|
|
|
impl<D:Decoder> Decodable<D> for Span {
|
|
fn decode(_d: &mut D) -> Span {
|
|
DUMMY_SP
|
|
}
|
|
}
|
|
|
|
pub fn spanned<T>(lo: BytePos, hi: BytePos, t: T) -> Spanned<T> {
|
|
respan(mk_sp(lo, hi), t)
|
|
}
|
|
|
|
pub fn respan<T>(sp: Span, t: T) -> Spanned<T> {
|
|
Spanned {node: t, span: sp}
|
|
}
|
|
|
|
pub fn dummy_spanned<T>(t: T) -> Spanned<T> {
|
|
respan(DUMMY_SP, t)
|
|
}
|
|
|
|
/* assuming that we're not in macro expansion */
|
|
pub fn mk_sp(lo: BytePos, hi: BytePos) -> Span {
|
|
Span {lo: lo, hi: hi, expn_info: None}
|
|
}
|
|
|
|
/// A source code location used for error reporting
|
|
pub struct Loc {
|
|
/// Information about the original source
|
|
file: @FileMap,
|
|
/// The (1-based) line number
|
|
line: uint,
|
|
/// The (0-based) column offset
|
|
col: CharPos
|
|
}
|
|
|
|
/// A source code location used as the result of lookup_char_pos_adj
|
|
// Actually, *none* of the clients use the filename *or* file field;
|
|
// perhaps they should just be removed.
|
|
pub struct LocWithOpt {
|
|
filename: FileName,
|
|
line: uint,
|
|
col: CharPos,
|
|
file: Option<@FileMap>,
|
|
}
|
|
|
|
// used to be structural records. Better names, anyone?
|
|
pub struct FileMapAndLine {fm: @FileMap, line: uint}
|
|
pub struct FileMapAndBytePos {fm: @FileMap, pos: BytePos}
|
|
|
|
#[deriving(Clone, Hash, Show)]
|
|
pub enum MacroFormat {
|
|
// e.g. #[deriving(...)] <item>
|
|
MacroAttribute,
|
|
// e.g. `format!()`
|
|
MacroBang
|
|
}
|
|
|
|
#[deriving(Clone, Hash, Show)]
|
|
pub struct NameAndSpan {
|
|
name: ~str,
|
|
// the format with which the macro was invoked.
|
|
format: MacroFormat,
|
|
span: Option<Span>
|
|
}
|
|
|
|
/// Extra information for tracking macro expansion of spans
|
|
#[deriving(Hash, Show)]
|
|
pub struct ExpnInfo {
|
|
call_site: Span,
|
|
callee: NameAndSpan
|
|
}
|
|
|
|
pub type FileName = ~str;
|
|
|
|
pub struct FileLines
|
|
{
|
|
file: @FileMap,
|
|
lines: Vec<uint> }
|
|
|
|
/// Identifies an offset of a multi-byte character in a FileMap
|
|
pub struct MultiByteChar {
|
|
/// The absolute offset of the character in the CodeMap
|
|
pos: BytePos,
|
|
/// The number of bytes, >=2
|
|
bytes: uint,
|
|
}
|
|
|
|
/// A single source in the CodeMap
|
|
pub struct FileMap {
|
|
/// The name of the file that the source came from, source that doesn't
|
|
/// originate from files has names between angle brackets by convention,
|
|
/// e.g. `<anon>`
|
|
name: FileName,
|
|
/// The complete source code
|
|
src: ~str,
|
|
/// The start position of this source in the CodeMap
|
|
start_pos: BytePos,
|
|
/// Locations of lines beginnings in the source code
|
|
lines: RefCell<Vec<BytePos> >,
|
|
/// Locations of multi-byte characters in the source code
|
|
multibyte_chars: RefCell<Vec<MultiByteChar> >,
|
|
}
|
|
|
|
impl FileMap {
|
|
// EFFECT: register a start-of-line offset in the
|
|
// table of line-beginnings.
|
|
// UNCHECKED INVARIANT: these offsets must be added in the right
|
|
// order and must be in the right places; there is shared knowledge
|
|
// about what ends a line between this file and parse.rs
|
|
// WARNING: pos param here is the offset relative to start of CodeMap,
|
|
// and CodeMap will append a newline when adding a filemap without a newline at the end,
|
|
// so the safe way to call this is with value calculated as
|
|
// filemap.start_pos + newline_offset_relative_to_the_start_of_filemap.
|
|
pub fn next_line(&self, pos: BytePos) {
|
|
// the new charpos must be > the last one (or it's the first one).
|
|
let mut lines = self.lines.borrow_mut();;
|
|
let line_len = lines.get().len();
|
|
assert!(line_len == 0 || (*lines.get().get(line_len - 1) < pos))
|
|
lines.get().push(pos);
|
|
}
|
|
|
|
// get a line from the list of pre-computed line-beginnings
|
|
pub fn get_line(&self, line: int) -> ~str {
|
|
let mut lines = self.lines.borrow_mut();
|
|
let begin: BytePos = *lines.get().get(line as uint) - self.start_pos;
|
|
let begin = begin.to_uint();
|
|
let slice = self.src.slice_from(begin);
|
|
match slice.find('\n') {
|
|
Some(e) => slice.slice_to(e).to_owned(),
|
|
None => slice.to_owned()
|
|
}
|
|
}
|
|
|
|
pub fn record_multibyte_char(&self, pos: BytePos, bytes: uint) {
|
|
assert!(bytes >=2 && bytes <= 4);
|
|
let mbc = MultiByteChar {
|
|
pos: pos,
|
|
bytes: bytes,
|
|
};
|
|
let mut multibyte_chars = self.multibyte_chars.borrow_mut();
|
|
multibyte_chars.get().push(mbc);
|
|
}
|
|
|
|
pub fn is_real_file(&self) -> bool {
|
|
!(self.name.starts_with("<") && self.name.ends_with(">"))
|
|
}
|
|
}
|
|
|
|
pub struct CodeMap {
|
|
files: RefCell<Vec<@FileMap> >
|
|
}
|
|
|
|
impl CodeMap {
|
|
pub fn new() -> CodeMap {
|
|
CodeMap {
|
|
files: RefCell::new(Vec::new()),
|
|
}
|
|
}
|
|
|
|
pub fn new_filemap(&self, filename: FileName, mut src: ~str) -> @FileMap {
|
|
let mut files = self.files.borrow_mut();
|
|
let start_pos = match files.get().last() {
|
|
None => 0,
|
|
Some(last) => last.start_pos.to_uint() + last.src.len(),
|
|
};
|
|
|
|
// Append '\n' in case it's not already there.
|
|
// This is a workaround to prevent CodeMap.lookup_filemap_idx from accidentally
|
|
// overflowing into the next filemap in case the last byte of span is also the last
|
|
// byte of filemap, which leads to incorrect results from CodeMap.span_to_*.
|
|
if src.len() > 0 && !src.ends_with("\n") {
|
|
src.push_char('\n');
|
|
}
|
|
|
|
let filemap = @FileMap {
|
|
name: filename,
|
|
src: src,
|
|
start_pos: Pos::from_uint(start_pos),
|
|
lines: RefCell::new(Vec::new()),
|
|
multibyte_chars: RefCell::new(Vec::new()),
|
|
};
|
|
|
|
files.get().push(filemap);
|
|
|
|
return filemap;
|
|
}
|
|
|
|
pub fn mk_substr_filename(&self, sp: Span) -> ~str {
|
|
let pos = self.lookup_char_pos(sp.lo);
|
|
return format!("<{}:{}:{}>", pos.file.name,
|
|
pos.line, pos.col.to_uint() + 1)
|
|
}
|
|
|
|
/// Lookup source information about a BytePos
|
|
pub fn lookup_char_pos(&self, pos: BytePos) -> Loc {
|
|
return self.lookup_pos(pos);
|
|
}
|
|
|
|
pub fn lookup_char_pos_adj(&self, pos: BytePos) -> LocWithOpt {
|
|
let loc = self.lookup_char_pos(pos);
|
|
LocWithOpt {
|
|
filename: loc.file.name.to_str(),
|
|
line: loc.line,
|
|
col: loc.col,
|
|
file: Some(loc.file)
|
|
}
|
|
}
|
|
|
|
pub fn span_to_str(&self, sp: Span) -> ~str {
|
|
{
|
|
let files = self.files.borrow();
|
|
if files.get().len() == 0 && sp == DUMMY_SP {
|
|
return ~"no-location";
|
|
}
|
|
}
|
|
|
|
let lo = self.lookup_char_pos_adj(sp.lo);
|
|
let hi = self.lookup_char_pos_adj(sp.hi);
|
|
return format!("{}:{}:{}: {}:{}", lo.filename,
|
|
lo.line, lo.col.to_uint() + 1, hi.line, hi.col.to_uint() + 1)
|
|
}
|
|
|
|
pub fn span_to_filename(&self, sp: Span) -> FileName {
|
|
let lo = self.lookup_char_pos(sp.lo);
|
|
lo.file.name.to_str()
|
|
}
|
|
|
|
pub fn span_to_lines(&self, sp: Span) -> @FileLines {
|
|
let lo = self.lookup_char_pos(sp.lo);
|
|
let hi = self.lookup_char_pos(sp.hi);
|
|
let mut lines = Vec::new();
|
|
for i in range(lo.line - 1u, hi.line as uint) {
|
|
lines.push(i);
|
|
};
|
|
return @FileLines {file: lo.file, lines: lines};
|
|
}
|
|
|
|
pub fn span_to_snippet(&self, sp: Span) -> Option<~str> {
|
|
let begin = self.lookup_byte_offset(sp.lo);
|
|
let end = self.lookup_byte_offset(sp.hi);
|
|
|
|
// FIXME #8256: this used to be an assert but whatever precondition
|
|
// it's testing isn't true for all spans in the AST, so to allow the
|
|
// caller to not have to fail (and it can't catch it since the CodeMap
|
|
// isn't sendable), return None
|
|
if begin.fm.start_pos != end.fm.start_pos {
|
|
None
|
|
} else {
|
|
Some(begin.fm.src.slice( begin.pos.to_uint(), end.pos.to_uint()).to_owned())
|
|
}
|
|
}
|
|
|
|
pub fn get_filemap(&self, filename: &str) -> @FileMap {
|
|
let files = self.files.borrow();
|
|
for fm in files.get().iter() {
|
|
if filename == fm.name {
|
|
return *fm
|
|
}
|
|
}
|
|
//XXjdm the following triggers a mismatched type bug
|
|
// (or expected function, found _|_)
|
|
fail!(); // ("asking for " + filename + " which we don't know about");
|
|
}
|
|
}
|
|
|
|
impl CodeMap {
|
|
fn lookup_filemap_idx(&self, pos: BytePos) -> uint {
|
|
let files = self.files.borrow();
|
|
let files = files.get();
|
|
let len = files.len();
|
|
let mut a = 0u;
|
|
let mut b = len;
|
|
while b - a > 1u {
|
|
let m = (a + b) / 2u;
|
|
if files.get(m).start_pos > pos {
|
|
b = m;
|
|
} else {
|
|
a = m;
|
|
}
|
|
}
|
|
// There can be filemaps with length 0. These have the same start_pos as the previous
|
|
// filemap, but are not the filemaps we want (because they are length 0, they cannot
|
|
// contain what we are looking for). So, rewind until we find a useful filemap.
|
|
loop {
|
|
let lines = files.get(a).lines.borrow();
|
|
let lines = lines.get();
|
|
if lines.len() > 0 {
|
|
break;
|
|
}
|
|
if a == 0 {
|
|
fail!("position {} does not resolve to a source location", pos.to_uint());
|
|
}
|
|
a -= 1;
|
|
}
|
|
if a >= len {
|
|
fail!("position {} does not resolve to a source location", pos.to_uint())
|
|
}
|
|
|
|
return a;
|
|
}
|
|
|
|
fn lookup_line(&self, pos: BytePos) -> FileMapAndLine
|
|
{
|
|
let idx = self.lookup_filemap_idx(pos);
|
|
|
|
let files = self.files.borrow();
|
|
let f = *files.get().get(idx);
|
|
let mut a = 0u;
|
|
let mut lines = f.lines.borrow_mut();
|
|
let mut b = lines.get().len();
|
|
while b - a > 1u {
|
|
let m = (a + b) / 2u;
|
|
if *lines.get().get(m) > pos { b = m; } else { a = m; }
|
|
}
|
|
return FileMapAndLine {fm: f, line: a};
|
|
}
|
|
|
|
fn lookup_pos(&self, pos: BytePos) -> Loc {
|
|
let FileMapAndLine {fm: f, line: a} = self.lookup_line(pos);
|
|
let line = a + 1u; // Line numbers start at 1
|
|
let chpos = self.bytepos_to_file_charpos(pos);
|
|
let lines = f.lines.borrow();
|
|
let linebpos = *lines.get().get(a);
|
|
let linechpos = self.bytepos_to_file_charpos(linebpos);
|
|
debug!("codemap: byte pos {:?} is on the line at byte pos {:?}",
|
|
pos, linebpos);
|
|
debug!("codemap: char pos {:?} is on the line at char pos {:?}",
|
|
chpos, linechpos);
|
|
debug!("codemap: byte is on line: {:?}", line);
|
|
assert!(chpos >= linechpos);
|
|
return Loc {
|
|
file: f,
|
|
line: line,
|
|
col: chpos - linechpos
|
|
};
|
|
}
|
|
|
|
fn lookup_byte_offset(&self, bpos: BytePos)
|
|
-> FileMapAndBytePos {
|
|
let idx = self.lookup_filemap_idx(bpos);
|
|
let files = self.files.borrow();
|
|
let fm = *files.get().get(idx);
|
|
let offset = bpos - fm.start_pos;
|
|
return FileMapAndBytePos {fm: fm, pos: offset};
|
|
}
|
|
|
|
// Converts an absolute BytePos to a CharPos relative to the filemap.
|
|
fn bytepos_to_file_charpos(&self, bpos: BytePos) -> CharPos {
|
|
debug!("codemap: converting {:?} to char pos", bpos);
|
|
let idx = self.lookup_filemap_idx(bpos);
|
|
let files = self.files.borrow();
|
|
let map = files.get().get(idx);
|
|
|
|
// The number of extra bytes due to multibyte chars in the FileMap
|
|
let mut total_extra_bytes = 0;
|
|
|
|
let multibyte_chars = map.multibyte_chars.borrow();
|
|
for mbc in multibyte_chars.get().iter() {
|
|
debug!("codemap: {:?}-byte char at {:?}", mbc.bytes, mbc.pos);
|
|
if mbc.pos < bpos {
|
|
// every character is at least one byte, so we only
|
|
// count the actual extra bytes.
|
|
total_extra_bytes += mbc.bytes - 1;
|
|
// We should never see a byte position in the middle of a
|
|
// character
|
|
assert!(bpos.to_uint() >= mbc.pos.to_uint() + mbc.bytes);
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
assert!(map.start_pos.to_uint() + total_extra_bytes <= bpos.to_uint());
|
|
CharPos(bpos.to_uint() - map.start_pos.to_uint() - total_extra_bytes)
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod test {
|
|
use super::*;
|
|
|
|
#[test]
|
|
fn t1 () {
|
|
let cm = CodeMap::new();
|
|
let fm = cm.new_filemap(~"blork.rs",~"first line.\nsecond line");
|
|
fm.next_line(BytePos(0));
|
|
assert_eq!(&fm.get_line(0),&~"first line.");
|
|
// TESTING BROKEN BEHAVIOR:
|
|
fm.next_line(BytePos(10));
|
|
assert_eq!(&fm.get_line(1),&~".");
|
|
}
|
|
|
|
#[test]
|
|
#[should_fail]
|
|
fn t2 () {
|
|
let cm = CodeMap::new();
|
|
let fm = cm.new_filemap(~"blork.rs",~"first line.\nsecond line");
|
|
// TESTING *REALLY* BROKEN BEHAVIOR:
|
|
fm.next_line(BytePos(0));
|
|
fm.next_line(BytePos(10));
|
|
fm.next_line(BytePos(2));
|
|
}
|
|
|
|
fn init_code_map() -> CodeMap {
|
|
let cm = CodeMap::new();
|
|
let fm1 = cm.new_filemap(~"blork.rs",~"first line.\nsecond line");
|
|
let fm2 = cm.new_filemap(~"empty.rs",~"");
|
|
let fm3 = cm.new_filemap(~"blork2.rs",~"first line.\nsecond line");
|
|
|
|
fm1.next_line(BytePos(0));
|
|
fm1.next_line(BytePos(12));
|
|
fm2.next_line(BytePos(24));
|
|
fm3.next_line(BytePos(24));
|
|
fm3.next_line(BytePos(34));
|
|
|
|
cm
|
|
}
|
|
|
|
#[test]
|
|
fn t3() {
|
|
// Test lookup_byte_offset
|
|
let cm = init_code_map();
|
|
|
|
let fmabp1 = cm.lookup_byte_offset(BytePos(22));
|
|
assert_eq!(fmabp1.fm.name, ~"blork.rs");
|
|
assert_eq!(fmabp1.pos, BytePos(22));
|
|
|
|
let fmabp2 = cm.lookup_byte_offset(BytePos(24));
|
|
assert_eq!(fmabp2.fm.name, ~"blork2.rs");
|
|
assert_eq!(fmabp2.pos, BytePos(0));
|
|
}
|
|
|
|
#[test]
|
|
fn t4() {
|
|
// Test bytepos_to_file_charpos
|
|
let cm = init_code_map();
|
|
|
|
let cp1 = cm.bytepos_to_file_charpos(BytePos(22));
|
|
assert_eq!(cp1, CharPos(22));
|
|
|
|
let cp2 = cm.bytepos_to_file_charpos(BytePos(24));
|
|
assert_eq!(cp2, CharPos(0));
|
|
}
|
|
|
|
#[test]
|
|
fn t5() {
|
|
// Test zero-length filemaps.
|
|
let cm = init_code_map();
|
|
|
|
let loc1 = cm.lookup_char_pos(BytePos(22));
|
|
assert_eq!(loc1.file.name, ~"blork.rs");
|
|
assert_eq!(loc1.line, 2);
|
|
assert_eq!(loc1.col, CharPos(10));
|
|
|
|
let loc2 = cm.lookup_char_pos(BytePos(24));
|
|
assert_eq!(loc2.file.name, ~"blork2.rs");
|
|
assert_eq!(loc2.line, 1);
|
|
assert_eq!(loc2.col, CharPos(0));
|
|
}
|
|
|
|
fn init_code_map_mbc() -> CodeMap {
|
|
let cm = CodeMap::new();
|
|
// € is a three byte utf8 char.
|
|
let fm1 = cm.new_filemap(~"blork.rs",~"fir€st €€€€ line.\nsecond line");
|
|
let fm2 = cm.new_filemap(~"blork2.rs",~"first line€€.\n€ second line");
|
|
|
|
fm1.next_line(BytePos(0));
|
|
fm1.next_line(BytePos(22));
|
|
fm2.next_line(BytePos(40));
|
|
fm2.next_line(BytePos(58));
|
|
|
|
fm1.record_multibyte_char(BytePos(3), 3);
|
|
fm1.record_multibyte_char(BytePos(9), 3);
|
|
fm1.record_multibyte_char(BytePos(12), 3);
|
|
fm1.record_multibyte_char(BytePos(15), 3);
|
|
fm1.record_multibyte_char(BytePos(18), 3);
|
|
fm2.record_multibyte_char(BytePos(50), 3);
|
|
fm2.record_multibyte_char(BytePos(53), 3);
|
|
fm2.record_multibyte_char(BytePos(58), 3);
|
|
|
|
cm
|
|
}
|
|
|
|
#[test]
|
|
fn t6() {
|
|
// Test bytepos_to_file_charpos in the presence of multi-byte chars
|
|
let cm = init_code_map_mbc();
|
|
|
|
let cp1 = cm.bytepos_to_file_charpos(BytePos(3));
|
|
assert_eq!(cp1, CharPos(3));
|
|
|
|
let cp2 = cm.bytepos_to_file_charpos(BytePos(6));
|
|
assert_eq!(cp2, CharPos(4));
|
|
|
|
let cp3 = cm.bytepos_to_file_charpos(BytePos(56));
|
|
assert_eq!(cp3, CharPos(12));
|
|
|
|
let cp4 = cm.bytepos_to_file_charpos(BytePos(61));
|
|
assert_eq!(cp4, CharPos(15));
|
|
}
|
|
|
|
#[test]
|
|
fn t7() {
|
|
// Test span_to_lines for a span ending at the end of filemap
|
|
let cm = init_code_map();
|
|
let span = Span {lo: BytePos(12), hi: BytePos(23), expn_info: None};
|
|
let file_lines = cm.span_to_lines(span);
|
|
|
|
assert_eq!(file_lines.file.name, ~"blork.rs");
|
|
assert_eq!(file_lines.lines.len(), 1);
|
|
assert_eq!(*file_lines.lines.get(0), 1u);
|
|
}
|
|
|
|
#[test]
|
|
fn t8() {
|
|
// Test span_to_snippet for a span ending at the end of filemap
|
|
let cm = init_code_map();
|
|
let span = Span {lo: BytePos(12), hi: BytePos(23), expn_info: None};
|
|
let snippet = cm.span_to_snippet(span);
|
|
|
|
assert_eq!(snippet, Some(~"second line"));
|
|
}
|
|
|
|
#[test]
|
|
fn t9() {
|
|
// Test span_to_str for a span ending at the end of filemap
|
|
let cm = init_code_map();
|
|
let span = Span {lo: BytePos(12), hi: BytePos(23), expn_info: None};
|
|
let sstr = cm.span_to_str(span);
|
|
|
|
assert_eq!(sstr, ~"blork.rs:2:1: 2:12");
|
|
}
|
|
}
|