Struct rustc_span::source_map::SourceMap

pub struct SourceMap {
    used_address_space: AtomicU32,
    files: RwLock<SourceMapFiles>,
    file_loader: Box<dyn FileLoader + Sync + Send>,
    path_mapping: FilePathMapping,
    hash_kind: SourceFileHashAlgorithm,
}

Fields

used_address_space: AtomicU32

The address space below this value is currently used by the files in the source map.

files: RwLock<SourceMapFiles>

file_loader: Box<dyn FileLoader + Sync + Send>

path_mapping: FilePathMapping

hash_kind: SourceFileHashAlgorithm

The algorithm used for hashing the contents of each source file.

Implementations

impl SourceMap

pub fn new(path_mapping: FilePathMapping) -> SourceMap

pub fn with_file_loader_and_hash_kind(
    file_loader: Box<dyn FileLoader + Sync + Send>,
    path_mapping: FilePathMapping,
    hash_kind: SourceFileHashAlgorithm
) -> SourceMap

pub fn path_mapping(&self) -> &FilePathMapping

pub fn file_exists(&self, path: &Path) -> bool

pub fn load_file(&self, path: &Path) -> Result<Lrc<SourceFile>>

pub fn load_binary_file(&self, path: &Path) -> Result<Vec<u8>>

Loads source file as a binary blob.

Unlike load_file, guarantees that no normalization like BOM-removal takes place.

pub fn files(&self) -> MappedReadGuard<'_, MonotonicVec<Lrc<SourceFile>>>

pub fn source_file_by_stable_id(
    &self,
    stable_id: StableSourceFileId
) -> Option<Lrc<SourceFile>>

fn allocate_address_space(
    &self,
    size: usize
) -> Result<usize, OffsetOverflowError>

pub fn new_source_file(
    &self,
    filename: FileName,
    src: String
) -> Lrc<SourceFile>

Creates a new SourceFile. If a file already exists in the SourceMap with the same ID, that file is returned unmodified.

fn try_new_source_file(
    &self,
    filename: FileName,
    src: String
) -> Result<Lrc<SourceFile>, OffsetOverflowError>

pub fn new_imported_source_file(
    &self,
    filename: FileName,
    src_hash: SourceFileHash,
    name_hash: u128,
    source_len: usize,
    cnum: CrateNum,
    file_local_lines: Vec<BytePos>,
    file_local_multibyte_chars: Vec<MultiByteChar>,
    file_local_non_narrow_chars: Vec<NonNarrowChar>,
    file_local_normalized_pos: Vec<NormalizedPos>,
    original_start_pos: BytePos,
    original_end_pos: BytePos
) -> Lrc<SourceFile>

Allocates a new SourceFile representing a source file from an external crate. The source code of such an “imported SourceFile” is not available, but we still know enough to generate accurate debuginfo location information for things inlined from other crates.

pub fn doctest_offset_line(&self, file: &FileName, orig: usize) -> usize

pub fn lookup_source_file(&self, pos: BytePos) -> Lrc<SourceFile>

Return the SourceFile that contains the given BytePos

pub fn lookup_char_pos(&self, pos: BytePos) -> Loc

Looks up source information about a BytePos.

pub fn lookup_line(
    &self,
    pos: BytePos
) -> Result<SourceFileAndLine, Lrc<SourceFile>>

fn span_to_string(
    &self,
    sp: Span,
    filename_display_pref: FileNameDisplayPreference
) -> String

pub fn span_to_embeddable_string(&self, sp: Span) -> String

Format the span location suitable for embedding in build artifacts

pub fn span_to_diagnostic_string(&self, sp: Span) -> String

Format the span location to be printed in diagnostics. Must not be emitted to build artifacts as this may leak local file paths. Use span_to_embeddable_string for string suitable for embedding.

pub fn span_to_filename(&self, sp: Span) -> FileName

pub fn filename_for_diagnostics<'a>(
    &self,
    filename: &'a FileName
) -> FileNameDisplay<'a>

pub fn is_multiline(&self, sp: Span) -> bool

pub fn is_valid_span(&self, sp: Span) -> Result<(Loc, Loc), SpanLinesError>

pub fn is_line_before_span_empty(&self, sp: Span) -> bool

pub fn span_to_lines(&self, sp: Span) -> FileLinesResult

fn span_to_source<F, T>(
    &self,
    sp: Span,
    extract_source: F
) -> Result<T, SpanSnippetError> where
    F: Fn(&str, usize, usize) -> Result<T, SpanSnippetError>, 

Extracts the source surrounding the given Span using the extract_source function. The extract function takes three arguments: a string slice containing the source, an index in the slice for the beginning of the span and an index in the slice for the end of the span.

pub fn is_local_span(&self, sp: Span) -> bool

Returns whether or not this span points into a file in the current crate. This may be false for spans produced by a macro expansion, or for spans associated with the definition of an item in a foreign crate

pub fn span_to_snippet(&self, sp: Span) -> Result<String, SpanSnippetError>

Returns the source snippet as String corresponding to the given Span.

pub fn span_to_margin(&self, sp: Span) -> Option<usize>

pub fn span_to_prev_source(&self, sp: Span) -> Result<String, SpanSnippetError>

Returns the source snippet as String before the given Span.

pub fn span_extend_to_prev_char(
    &self,
    sp: Span,
    c: char,
    accept_newlines: bool
) -> Span

Extends the given Span to just after the previous occurrence of c. Return the same span if no character could be found or if an error occurred while retrieving the code snippet.

pub fn span_extend_to_prev_str(
    &self,
    sp: Span,
    pat: &str,
    accept_newlines: bool
) -> Span

Extends the given Span to just after the previous occurrence of pat when surrounded by whitespace. Returns the same span if no character could be found or if an error occurred while retrieving the code snippet.

pub fn span_to_next_source(&self, sp: Span) -> Result<String, SpanSnippetError>

Returns the source snippet as String after the given Span.

pub fn span_extend_while(
    &self,
    span: Span,
    f: impl Fn(char) -> bool
) -> Result<Span, SpanSnippetError>

Extends the given Span while the next character matches the predicate

pub fn span_extend_to_next_char(
    &self,
    sp: Span,
    c: char,
    accept_newlines: bool
) -> Span

Extends the given Span to just after the next occurrence of c.

pub fn span_until_char(&self, sp: Span, c: char) -> Span

Given a Span, tries to get a shorter span ending before the first occurrence of char c.

pub fn span_through_char(&self, sp: Span, c: char) -> Span

Given a Span, tries to get a shorter span ending just after the first occurrence of char c.

pub fn span_until_non_whitespace(&self, sp: Span) -> Span

Given a Span, gets a new Span covering the first token and all its trailing whitespace or the original Span.

If sp points to "let mut x", then a span pointing at "let " will be returned.

pub fn span_until_whitespace(&self, sp: Span) -> Span

Given a Span, gets a new Span covering the first token without its trailing whitespace or the original Span in case of error.

If sp points to "let mut x", then a span pointing at "let" will be returned.

pub fn span_take_while<P>(&self, sp: Span, predicate: P) -> Span where
    P: for<'r> FnMut(&'r char) -> bool, 

Given a Span, gets a shorter one until predicate yields false.

pub fn guess_head_span(&self, sp: Span) -> Span

Given a Span, return a span ending in the closest {. This is useful when you have a Span enclosing a whole item but we need to point at only the head (usually the first line) of that item.

Only suitable for diagnostics.

pub fn start_point(&self, sp: Span) -> Span

Returns a new span representing just the first character of the given span.

pub fn end_point(&self, sp: Span) -> Span

Returns a new span representing just the last character of this span.

pub fn next_point(&self, sp: Span) -> Span

Returns a new span representing the next character after the end-point of this span.

fn find_width_of_character_at_span(&self, sp: Span, forwards: bool) -> u32

Finds the width of the character, either before or after the end of provided span, depending on the forwards parameter.

pub fn get_source_file(&self, filename: &FileName) -> Option<Lrc<SourceFile>>

pub fn lookup_byte_offset(&self, bpos: BytePos) -> SourceFileAndBytePos

For a global BytePos, computes the local offset within the containing SourceFile.

pub fn lookup_source_file_idx(&self, pos: BytePos) -> usize

pub fn count_lines(&self) -> usize

pub fn generate_fn_name_span(&self, span: Span) -> Option<Span>

pub fn generate_local_type_param_snippet(
    &self,
    span: Span
) -> Option<(Span, String)>

Takes the span of a type parameter in a function signature and try to generate a span for the function name (with generics) and a new snippet for this span with the pointed type parameter as a new local type parameter.

For instance:

// Given span
fn my_function(param: T)
//                    ^ Original span

// Result
fn my_function(param: T)
// ^^^^^^^^^^^ Generated span with snippet `my_function<T>`

Attention: The method used is very fragile since it essentially duplicates the work of the parser. If you need to use this function or something similar, please consider updating the SourceMap functions and this function to something more robust.

pub fn ensure_source_file_source_present(
    &self,
    source_file: Lrc<SourceFile>
) -> bool

pub fn is_imported(&self, sp: Span) -> bool

pub fn stmt_span(&self, stmt_span: Span, block_span: Span) -> Span

Gets the span of a statement. If the statement is a macro expansion, the span in the context of the block span is found. The trailing semicolon is included on a best-effort basis.

pub fn mac_call_stmt_semi_span(&self, mac_call: Span) -> Option<Span>

Tries to find the span of the semicolon of a macro call statement. The input must be the call site span of a statement from macro expansion.

      v output
mac!();
^^^^^^ input

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 120 bytes