various improvements/refactors of the decoder and its errors #845
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This is a little less space efficient but it gets rid of a lifetime parameter on the lexer token, which is annoying because it prevents us from putting it into error types. (Currently we convert it to a string before putting it into an error.) It also eliminates a whole bunch of panics where we convert slices to hashes and .expect() on the length being right, when we know it's right.
Also clean up the names and format messages for them.
…onstructors We have infallible constructors for all the terminals except multi/multia. We should use them and eliminate a bunch of error paths.
The word "parse" is redundant at best, and wrong at worst (we use "decode" when converting a script and "parse" when converting a string). The variants were also overly verbose and the formatting text lost information. Clean all this up.
We should backport this one to 12.x (with a deprecation). Would also be open to doing a deprecation here in master. But this has been bugging me for years, and also it's much less common to decode miniscript from script than we imagined back in 2018. Provides symmetry with encode() and consistency with the docs (though this PR does not fix up the docs).
apoelstra
force-pushed
the
2025-07/decode
branch
from
5cca410 to
cdb36c1
Compare
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
The last commit, which renames
parse_with_exttodecode_with_ext, I think we should backport with deprecation to 12.x. This is a pretty uncommonly used function and is unlikely to bother anybody, but the current name is inconsistent with our general use of "parse" for strings and "decode" for scripts.