-use syntax::codemap::{BytePos, CodeMap, Span};
+use std::rc::Rc;
+
+use syntax::codemap::{BytePos, CodeMap, FileMap, Span};
use comment::FindUncommented;
+/// A range of lines in a file, inclusive of both ends.
+pub struct LineRange {
+ pub file: Rc<FileMap>,
+ pub lo: usize,
+ pub hi: usize,
+}
+
+impl LineRange {
+ pub fn file_name(&self) -> &str {
+ self.file.as_ref().name.as_str()
+ }
+}
+
pub trait SpanUtils {
fn span_after(&self, original: Span, needle: &str) -> BytePos;
fn span_after_last(&self, original: Span, needle: &str) -> BytePos;
fn span_before(&self, original: Span, needle: &str) -> BytePos;
}
+pub trait LineRangeUtils {
+ /// Returns the `LineRange` that corresponds to `span` in `self`.
+ ///
+ /// # Panics
+ ///
+ /// Panics if `span` crosses a file boundary, which shouldn't happen.
+ fn lookup_line_range(&self, span: Span) -> LineRange;
+}
+
impl SpanUtils for CodeMap {
#[inline]
fn span_after(&self, original: Span, needle: &str) -> BytePos {
original.lo + BytePos(offset as u32)
}
}
+
+impl LineRangeUtils for CodeMap {
+ fn lookup_line_range(&self, span: Span) -> LineRange {
+ let lo = self.lookup_char_pos(span.lo);
+ let hi = self.lookup_char_pos(span.hi);
+
+ assert!(lo.file.name == hi.file.name,
+ "span crossed file boundary: lo: {:?}, hi: {:?}",
+ lo,
+ hi);
+
+ LineRange {
+ file: lo.file.clone(),
+ lo: lo.line,
+ hi: hi.line,
+ }
+ }
+}