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Make get_rust_byte_offsets more generic so it can be used for contents.
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This commit is contained in:
Tom Alexander 2023-10-31 21:59:58 -04:00
parent 6c197c376a
commit 33f4614d28
Signed by: talexander
GPG Key ID: D3A179C9A53C0EDE
1 changed files with 7 additions and 11 deletions
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18
src/compare/util.rs
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@ -29,14 +29,10 @@ fn is_slice_of(parent: &str, child: &str) -> bool {
/// Get the byte offset into source that the rust object exists at.
///
/// These offsets are zero-based unlike the elisp ones.
fn get_rust_byte_offsets<'b, 's, S: StandardProperties<'s> + ?Sized>(
original_document: &'s str,
rust_ast_node: &'b S,
) -> (usize, usize) {
let rust_object_source = rust_ast_node.get_source();
debug_assert!(is_slice_of(original_document, rust_object_source));
let offset = rust_object_source.as_ptr() as usize - original_document.as_ptr() as usize;
let end = offset + rust_object_source.len();
fn get_rust_byte_offsets<'b, 's>(original_document: &'s str, subset: &'b str) -> (usize, usize) {
debug_assert!(is_slice_of(original_document, subset));
let offset = subset.as_ptr() as usize - original_document.as_ptr() as usize;
let end = offset + subset.len();
(offset, end)
}
@ -54,7 +50,7 @@ pub(crate) fn compare_standard_properties<
Ok(())
}
pub(crate) fn assert_name<S: AsRef<str>>(
fn assert_name<S: AsRef<str>>(
emacs: &Token<'_>,
name: S,
) -> Result<(), Box<dyn std::error::Error>> {
@ -77,7 +73,7 @@ pub(crate) fn assert_name<S: AsRef<str>>(
/// Assert that the character ranges defined by upstream org-mode's :standard-properties match the slices in Organic's StandardProperties.
///
/// This does **not** handle plain text because plain text is a special case.
pub(crate) fn assert_bounds<'b, 's, S: StandardProperties<'s> + ?Sized>(
fn assert_bounds<'b, 's, S: StandardProperties<'s> + ?Sized>(
original_document: &'s str,
emacs: &'b Token<'s>,
rust: &'b S,
@ -89,7 +85,7 @@ pub(crate) fn assert_bounds<'b, 's, S: StandardProperties<'s> + ?Sized>(
.ok_or("Token should have a begin.")?,
standard_properties.end.ok_or("Token should have an end.")?,
);
let (rust_begin, rust_end) = get_rust_byte_offsets(original_document, rust); // 0-based
let (rust_begin, rust_end) = get_rust_byte_offsets(original_document, rust.get_source()); // 0-based
let rust_begin_char_offset = original_document[..rust_begin].chars().count() + 1; // 1-based
let rust_end_char_offset =
rust_begin_char_offset + original_document[rust_begin..rust_end].chars().count(); // 1-based