| // 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. |
| // |
| // ignore-lexer-test FIXME #15679 |
| |
| //! 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. |
| |
| pub use self::MacroFormat::*; |
| |
| use std::cell::RefCell; |
| use std::num::ToPrimitive; |
| use std::ops::{Add, Sub}; |
| use std::rc::Rc; |
| |
| use libc::c_uint; |
| 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. |
| #[derive(Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Show)] |
| pub struct BytePos(pub 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. |
| #[derive(Copy, PartialEq, Hash, PartialOrd, Show)] |
| pub struct CharPos(pub 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 for BytePos { |
| type Output = BytePos; |
| |
| fn add(self, rhs: BytePos) -> BytePos { |
| BytePos((self.to_uint() + rhs.to_uint()) as u32) |
| } |
| } |
| |
| impl Sub for BytePos { |
| type Output = 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 for CharPos { |
| type Output = CharPos; |
| |
| fn add(self, rhs: CharPos) -> CharPos { |
| CharPos(self.to_uint() + rhs.to_uint()) |
| } |
| } |
| |
| impl Sub for CharPos { |
| type Output = 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. |
| #[derive(Clone, Copy, Show, Hash)] |
| pub struct Span { |
| pub lo: BytePos, |
| pub hi: BytePos, |
| /// Information about where the macro came from, if this piece of |
| /// code was created by a macro expansion. |
| pub expn_id: ExpnId |
| } |
| |
| pub const DUMMY_SP: Span = Span { lo: BytePos(0), hi: BytePos(0), expn_id: NO_EXPANSION }; |
| |
| // Generic span to be used for code originating from the command line |
| pub const COMMAND_LINE_SP: Span = Span { lo: BytePos(0), |
| hi: BytePos(0), |
| expn_id: COMMAND_LINE_EXPN }; |
| |
| #[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Show, Copy)] |
| pub struct Spanned<T> { |
| pub node: T, |
| pub span: Span, |
| } |
| |
| impl PartialEq 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 Eq for Span {} |
| |
| impl Encodable for Span { |
| /* Note #1972 -- spans are encoded but not decoded */ |
| fn encode<S: Encoder>(&self, s: &mut S) -> Result<(), S::Error> { |
| s.emit_nil() |
| } |
| } |
| |
| impl Decodable for Span { |
| fn decode<D: Decoder>(_d: &mut D) -> Result<Span, D::Error> { |
| Ok(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_id: NO_EXPANSION} |
| } |
| |
| /// Return the span itself if it doesn't come from a macro expansion, |
| /// otherwise return the call site span up to the `enclosing_sp` by |
| /// following the `expn_info` chain. |
| pub fn original_sp(cm: &CodeMap, sp: Span, enclosing_sp: Span) -> Span { |
| let call_site1 = cm.with_expn_info(sp.expn_id, |ei| ei.map(|ei| ei.call_site)); |
| let call_site2 = cm.with_expn_info(enclosing_sp.expn_id, |ei| ei.map(|ei| ei.call_site)); |
| match (call_site1, call_site2) { |
| (None, _) => sp, |
| (Some(call_site1), Some(call_site2)) if call_site1 == call_site2 => sp, |
| (Some(call_site1), _) => original_sp(cm, call_site1, enclosing_sp), |
| } |
| } |
| |
| /// A source code location used for error reporting |
| pub struct Loc { |
| /// Information about the original source |
| pub file: Rc<FileMap>, |
| /// The (1-based) line number |
| pub line: uint, |
| /// The (0-based) column offset |
| pub 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 { |
| pub filename: FileName, |
| pub line: uint, |
| pub col: CharPos, |
| pub file: Option<Rc<FileMap>>, |
| } |
| |
| // used to be structural records. Better names, anyone? |
| pub struct FileMapAndLine { pub fm: Rc<FileMap>, pub line: uint } |
| pub struct FileMapAndBytePos { pub fm: Rc<FileMap>, pub pos: BytePos } |
| |
| /// The syntax with which a macro was invoked. |
| #[derive(Clone, Copy, Hash, Show)] |
| pub enum MacroFormat { |
| /// e.g. #[derive(...)] <item> |
| MacroAttribute, |
| /// e.g. `format!()` |
| MacroBang |
| } |
| |
| #[derive(Clone, Hash, Show)] |
| pub struct NameAndSpan { |
| /// The name of the macro that was invoked to create the thing |
| /// with this Span. |
| pub name: String, |
| /// The format with which the macro was invoked. |
| pub format: MacroFormat, |
| /// The span of the macro definition itself. The macro may not |
| /// have a sensible definition span (e.g. something defined |
| /// completely inside libsyntax) in which case this is None. |
| pub span: Option<Span> |
| } |
| |
| /// Extra information for tracking macro expansion of spans |
| #[derive(Hash, Show)] |
| pub struct ExpnInfo { |
| /// The location of the actual macro invocation, e.g. `let x = |
| /// foo!();` |
| /// |
| /// This may recursively refer to other macro invocations, e.g. if |
| /// `foo!()` invoked `bar!()` internally, and there was an |
| /// expression inside `bar!`; the call_site of the expression in |
| /// the expansion would point to the `bar!` invocation; that |
| /// call_site span would have its own ExpnInfo, with the call_site |
| /// pointing to the `foo!` invocation. |
| pub call_site: Span, |
| /// Information about the macro and its definition. |
| /// |
| /// The `callee` of the inner expression in the `call_site` |
| /// example would point to the `macro_rules! bar { ... }` and that |
| /// of the `bar!()` invocation would point to the `macro_rules! |
| /// foo { ... }`. |
| pub callee: NameAndSpan |
| } |
| |
| #[derive(PartialEq, Eq, Clone, Show, Hash, RustcEncodable, RustcDecodable, Copy)] |
| pub struct ExpnId(u32); |
| |
| pub const NO_EXPANSION: ExpnId = ExpnId(-1); |
| // For code appearing from the command line |
| pub const COMMAND_LINE_EXPN: ExpnId = ExpnId(-2); |
| |
| impl ExpnId { |
| pub fn from_llvm_cookie(cookie: c_uint) -> ExpnId { |
| ExpnId(cookie as u32) |
| } |
| |
| pub fn to_llvm_cookie(self) -> i32 { |
| let ExpnId(cookie) = self; |
| cookie as i32 |
| } |
| } |
| |
| pub type FileName = String; |
| |
| pub struct FileLines { |
| pub file: Rc<FileMap>, |
| pub lines: Vec<uint> |
| } |
| |
| /// Identifies an offset of a multi-byte character in a FileMap |
| #[derive(Copy)] |
| pub struct MultiByteChar { |
| /// The absolute offset of the character in the CodeMap |
| pub pos: BytePos, |
| /// The number of bytes, >=2 |
| pub 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>` |
| pub name: FileName, |
| /// The complete source code |
| pub src: String, |
| /// The start position of this source in the CodeMap |
| pub start_pos: BytePos, |
| /// Locations of lines beginnings in the source code |
| pub lines: RefCell<Vec<BytePos> >, |
| /// Locations of multi-byte characters in the source code |
| pub 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.len(); |
| assert!(line_len == 0 || ((*lines)[line_len - 1] < pos)); |
| lines.push(pos); |
| } |
| |
| /// get a line from the list of pre-computed line-beginnings |
| /// |
| pub fn get_line(&self, line_number: uint) -> Option<String> { |
| let lines = self.lines.borrow(); |
| lines.get(line_number).map(|&line| { |
| let begin: BytePos = line - self.start_pos; |
| let begin = begin.to_uint(); |
| let slice = &self.src[begin..]; |
| match slice.find('\n') { |
| Some(e) => &slice[..e], |
| None => slice |
| }.to_string() |
| }) |
| } |
| |
| pub fn record_multibyte_char(&self, pos: BytePos, bytes: uint) { |
| assert!(bytes >=2 && bytes <= 4); |
| let mbc = MultiByteChar { |
| pos: pos, |
| bytes: bytes, |
| }; |
| self.multibyte_chars.borrow_mut().push(mbc); |
| } |
| |
| pub fn is_real_file(&self) -> bool { |
| !(self.name.starts_with("<") && |
| self.name.ends_with(">")) |
| } |
| } |
| |
| pub struct CodeMap { |
| pub files: RefCell<Vec<Rc<FileMap>>>, |
| expansions: RefCell<Vec<ExpnInfo>> |
| } |
| |
| impl CodeMap { |
| pub fn new() -> CodeMap { |
| CodeMap { |
| files: RefCell::new(Vec::new()), |
| expansions: RefCell::new(Vec::new()), |
| } |
| } |
| |
| pub fn new_filemap(&self, filename: FileName, src: String) -> Rc<FileMap> { |
| let mut files = self.files.borrow_mut(); |
| let start_pos = match files.last() { |
| None => 0, |
| Some(last) => last.start_pos.to_uint() + last.src.len(), |
| }; |
| |
| // Remove utf-8 BOM if any. |
| // FIXME #12884: no efficient/safe way to remove from the start of a string |
| // and reuse the allocation. |
| let mut src = if src.starts_with("\u{feff}") { |
| String::from_str(&src[3..]) |
| } else { |
| String::from_str(&src[]) |
| }; |
| |
| // 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('\n'); |
| } |
| |
| let filemap = Rc::new(FileMap { |
| name: filename, |
| src: src.to_string(), |
| start_pos: Pos::from_uint(start_pos), |
| lines: RefCell::new(Vec::new()), |
| multibyte_chars: RefCell::new(Vec::new()), |
| }); |
| |
| files.push(filemap.clone()); |
| |
| filemap |
| } |
| |
| pub fn mk_substr_filename(&self, sp: Span) -> String { |
| let pos = self.lookup_char_pos(sp.lo); |
| (format!("<{}:{}:{}>", |
| pos.file.name, |
| pos.line, |
| pos.col.to_uint() + 1)).to_string() |
| } |
| |
| /// Lookup source information about a BytePos |
| pub fn lookup_char_pos(&self, pos: BytePos) -> Loc { |
| 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_string(), |
| line: loc.line, |
| col: loc.col, |
| file: Some(loc.file) |
| } |
| } |
| |
| pub fn span_to_string(&self, sp: Span) -> String { |
| if self.files.borrow().len() == 0 && sp == DUMMY_SP { |
| return "no-location".to_string(); |
| } |
| |
| 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)).to_string() |
| } |
| |
| pub fn span_to_filename(&self, sp: Span) -> FileName { |
| self.lookup_char_pos(sp.lo).file.name.to_string() |
| } |
| |
| 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); |
| }; |
| FileLines {file: lo.file, lines: lines} |
| } |
| |
| pub fn span_to_snippet(&self, sp: Span) -> Option<String> { |
| 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 panic (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[begin.pos.to_uint()..end.pos.to_uint()]).to_string()) |
| } |
| } |
| |
| pub fn get_filemap(&self, filename: &str) -> Rc<FileMap> { |
| for fm in self.files.borrow().iter() { |
| if filename == fm.name { |
| return fm.clone(); |
| } |
| } |
| panic!("asking for {} which we don't know about", filename); |
| } |
| |
| pub fn lookup_byte_offset(&self, bpos: BytePos) -> FileMapAndBytePos { |
| let idx = self.lookup_filemap_idx(bpos); |
| let fm = (*self.files.borrow())[idx].clone(); |
| let offset = bpos - fm.start_pos; |
| FileMapAndBytePos {fm: fm, pos: offset} |
| } |
| |
| /// Converts an absolute BytePos to a CharPos relative to the filemap and above. |
| pub fn bytepos_to_file_charpos(&self, bpos: BytePos) -> CharPos { |
| let idx = self.lookup_filemap_idx(bpos); |
| let files = self.files.borrow(); |
| let map = &(*files)[idx]; |
| |
| // The number of extra bytes due to multibyte chars in the FileMap |
| let mut total_extra_bytes = 0; |
| |
| for mbc in map.multibyte_chars.borrow().iter() { |
| debug!("{}-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) |
| } |
| |
| fn lookup_filemap_idx(&self, pos: BytePos) -> uint { |
| let files = self.files.borrow(); |
| let files = &*files; |
| let len = files.len(); |
| let mut a = 0u; |
| let mut b = len; |
| while b - a > 1u { |
| let m = (a + b) / 2u; |
| if files[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[a].lines.borrow(); |
| let lines = lines; |
| if lines.len() > 0 { |
| break; |
| } |
| if a == 0 { |
| panic!("position {} does not resolve to a source location", |
| pos.to_uint()); |
| } |
| a -= 1; |
| } |
| if a >= len { |
| panic!("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)[idx].clone(); |
| let mut a = 0u; |
| { |
| let lines = f.lines.borrow(); |
| let mut b = lines.len(); |
| while b - a > 1u { |
| let m = (a + b) / 2u; |
| if (*lines)[m] > pos { b = m; } else { a = m; } |
| } |
| } |
| 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 linebpos = (*f.lines.borrow())[a]; |
| let linechpos = self.bytepos_to_file_charpos(linebpos); |
| debug!("byte pos {:?} is on the line at byte pos {:?}", |
| pos, linebpos); |
| debug!("char pos {:?} is on the line at char pos {:?}", |
| chpos, linechpos); |
| debug!("byte is on line: {}", line); |
| assert!(chpos >= linechpos); |
| Loc { |
| file: f, |
| line: line, |
| col: chpos - linechpos |
| } |
| } |
| |
| pub fn record_expansion(&self, expn_info: ExpnInfo) -> ExpnId { |
| let mut expansions = self.expansions.borrow_mut(); |
| expansions.push(expn_info); |
| ExpnId(expansions.len().to_u32().expect("too many ExpnInfo's!") - 1) |
| } |
| |
| pub fn with_expn_info<T, F>(&self, id: ExpnId, f: F) -> T where |
| F: FnOnce(Option<&ExpnInfo>) -> T, |
| { |
| match id { |
| NO_EXPANSION => f(None), |
| ExpnId(i) => f(Some(&(*self.expansions.borrow())[i as uint])) |
| } |
| } |
| |
| /// Check if a span is "internal" to a macro. This means that it is entirely generated by a |
| /// macro expansion and contains no code that was passed in as an argument. |
| pub fn span_is_internal(&self, span: Span) -> bool { |
| // first, check if the given expression was generated by a macro or not |
| // we need to go back the expn_info tree to check only the arguments |
| // of the initial macro call, not the nested ones. |
| let mut is_internal = false; |
| let mut expnid = span.expn_id; |
| while self.with_expn_info(expnid, |expninfo| { |
| match expninfo { |
| Some(ref info) => { |
| // save the parent expn_id for next loop iteration |
| expnid = info.call_site.expn_id; |
| if info.callee.name == "format_args" { |
| // This is a hack because the format_args builtin calls unstable APIs. |
| // I spent like 6 hours trying to solve this more generally but am stupid. |
| is_internal = true; |
| false |
| } else if info.callee.span.is_none() { |
| // it's a compiler built-in, we *really* don't want to mess with it |
| // so we skip it, unless it was called by a regular macro, in which case |
| // we will handle the caller macro next turn |
| is_internal = true; |
| true // continue looping |
| } else { |
| // was this expression from the current macro arguments ? |
| is_internal = !( span.lo > info.call_site.lo && |
| span.hi < info.call_site.hi ); |
| true // continue looping |
| } |
| }, |
| _ => false // stop looping |
| } |
| }) { /* empty while loop body */ } |
| return is_internal; |
| } |
| } |
| |
| #[cfg(test)] |
| mod test { |
| use super::*; |
| |
| #[test] |
| fn t1 () { |
| let cm = CodeMap::new(); |
| let fm = cm.new_filemap("blork.rs".to_string(), |
| "first line.\nsecond line".to_string()); |
| fm.next_line(BytePos(0)); |
| assert_eq!(fm.get_line(0), Some("first line.".to_string())); |
| // TESTING BROKEN BEHAVIOR: |
| fm.next_line(BytePos(10)); |
| assert_eq!(fm.get_line(1), Some(".".to_string())); |
| } |
| |
| #[test] |
| #[should_fail] |
| fn t2 () { |
| let cm = CodeMap::new(); |
| let fm = cm.new_filemap("blork.rs".to_string(), |
| "first line.\nsecond line".to_string()); |
| // 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".to_string(), |
| "first line.\nsecond line".to_string()); |
| let fm2 = cm.new_filemap("empty.rs".to_string(), |
| "".to_string()); |
| let fm3 = cm.new_filemap("blork2.rs".to_string(), |
| "first line.\nsecond line".to_string()); |
| |
| 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".to_string(), |
| "fir€st €€€€ line.\nsecond line".to_string()); |
| let fm2 = cm.new_filemap("blork2.rs".to_string(), |
| "first line€€.\n€ second line".to_string()); |
| |
| 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_id: NO_EXPANSION}; |
| 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[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_id: NO_EXPANSION}; |
| let snippet = cm.span_to_snippet(span); |
| |
| assert_eq!(snippet, Some("second line".to_string())); |
| } |
| |
| #[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_id: NO_EXPANSION}; |
| let sstr = cm.span_to_string(span); |
| |
| assert_eq!(sstr, "blork.rs:2:1: 2:12"); |
| } |
| } |
