The AST structures track annotations (e.g., at the moment, source code
position information) in a lot of places. This patch tidies up a bit and
removes some duplication, ensuring a single level of annotation wrapping
at each AST recursion level.
This will be important when adding type information in these
annotations, because there will be consitency constraints to be ensured
and duplication is a likely source of mistakes.
this patch is just a bunch of `sed` commands
```shell
cd compiler
sed -i 's/Pos.marked/Marked.pos/g' *.ml* **/*.ml*
sed -i 's/Pos.unmark/Marked.unmark/g' *.ml* **/*.ml*
sed -i 's/Pos\.get_position/Marked.get_mark/g' *.ml* **/*.ml*
sed -i 's/Pos\.same_pos_as/Marked.same_mark_as/g' *.ml* **/*.ml*
sed -i 's/Pos\.map_under_mark/Marked.map_under_mark/g' *.ml* **/*.ml*
sed -i 's/Pos\.mark/Marked.mark/g' *.ml* **/*.ml*
sed -i 's/Pos\.compare_marked/Marked.compare/g' *.ml* **/*.ml*
```
Closes#208 (implementing Solution 1, without adding an explicit syntax)
Two exceptions or more, e.g. `(j1 |- c1)` and `(j2 |- c2)` such that `c1
= c2`, are collapsed by this transformation into `((j1 |- c1) | j2 |-
c2)`, introducing an arbitrary precedence that avoids the conflict.
The transormation is not applied if any exceptions apply to the subterms
themselves: while these exceptions could be merged, that would turn more
conflicts into arbitrary outcomes than wanted.
Adds syntactic comparison for some expressions, etc., allowing in
particular to detect syntactically equal expressions. Positions are,
obviously, ignored.
This avoids many intermediate calls to e.g. `Format.asprintf`; should result in
some cases in "more correct" use of `Format`¹, avoid the computation of unused
debug strings, and make the code more readable.
¹ for `Format` to work as expected, all intermediate calls need to go through
it. Some cases of formatting to an intermediate string then printing through Format
again are still present, but this makes the situation better.
Cleaner rewriting of main let-binding chaining procedure from Scopelang to Dcalc
Removed costly unboxing in DCalc.Ast.make_let_in seemed to do the trick
