Move the sexp parser into the parser crate.

We need to parse sexp for diary sexp.

build.rs

@@ -61,7 +61,7 @@ fn write_header(test_file: &mut File) {
 use organic::compare_document;
 use organic::parser::document;
 use organic::emacs_parse_org_document;
-use organic::sexp;
+use organic::parser::sexp::sexp;
 
 "#
     )

src/compare/diff.rs

@@ -1,6 +1,6 @@
-use super::sexp::Token;
 use super::util::assert_bounds;
 use super::util::assert_name;
+use crate::parser::sexp::Token;
 use crate::parser::Clock;
 use crate::parser::Comment;
 use crate::parser::CommentBlock;

src/compare/mod.rs

@@ -1,7 +1,5 @@
 mod diff;
 mod parse;
-mod sexp;
 mod util;
 pub use diff::compare_document;
 pub use parse::emacs_parse_org_document;
-pub use sexp::sexp;

src/compare/util.rs

@@ -1,7 +1,6 @@
+use crate::parser::sexp::Token;
 use crate::parser::Source;
 
-use super::sexp::Token;
-
 /// Check if the child string slice is a slice of the parent string slice.
 fn is_slice_of(parent: &str, child: &str) -> bool {
     let parent_start = parent.as_ptr() as usize;

src/lib.rs

@@ -7,8 +7,6 @@ mod compare;
 pub use compare::compare_document;
 #[cfg(feature = "compare")]
 pub use compare::emacs_parse_org_document;
-#[cfg(feature = "compare")]
-pub use compare::sexp;
 
 mod error;
 pub mod parser;

src/parser/mod.rs

@@ -21,6 +21,7 @@ mod parser_with_context;
 mod plain_list;
 mod plain_text;
 mod property_drawer;
+pub mod sexp;
 mod source;
 mod table;
 mod util;