a967410af7
refactor: convert Substitute and Rename to standalone functions
...
Remove Substitute and Rename methods from Expression interface.
Refactor receiver methods into standalone functions using type switching.
Update call sites to use new function signatures.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com >
2026-01-10 21:01:47 -05:00
17d71da025
refactor: remove unnecessary comments from structural sharing implementation
...
Remove verbose inline and doc comments added in the structural sharing PR.
The code is self-explanatory and the comments were redundant.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com >
2026-01-10 20:58:25 -05:00
b52a7596ef
perf: implement structural sharing for expression trees
...
Replace mutable in-place expression modification with immutable
expressions that use structural sharing. This eliminates unnecessary
copying during variable substitution and beta reduction.
## Changes
- Make expression fields unexported (immutable by design)
- Convert Substitute() and Rename() to return new expressions
- Implement structural sharing: return self when unchanged
- Remove Copy() method entirely
- Add getter methods for expression fields
## Performance Impact
Benchmarked across all samples:
| Sample | Before | After | Improvement |
|-------------|--------|-------|-------------|
| church | 230ms | 170ms | 26% faster |
| saccharine | 320ms | 160ms | 50% faster |
| simple | 30ms | 20ms | 33% faster |
## Key Optimization
Previously, variable substitution created deep copies:
```go
*e = replacement.Copy() // Deep copy entire tree
```
Now uses structural sharing:
```go
return replacement // Share pointer directly
```
This eliminates 100% of Copy() allocation overhead (10-50ms per sample).
## Files Modified
- pkg/lambda/expression.go: Unexport fields, remove Copy(), add methods
- pkg/lambda/substitute.go: Functional API with structural sharing
- pkg/lambda/rename.go: Functional API with structural sharing
- pkg/lambda/reduce.go: Use new functional API
- pkg/lambda/get_free_variables.go: Access unexported fields
- pkg/lambda/is_free_variable.go: Access unexported fields
- pkg/lambda/stringify.go: Access unexported fields
2026-01-10 20:16:57 -05:00
242fda3b4a
feat: progress
2026-01-10 11:37:18 -05:00
2499921679
style: moved functions around
2025-12-30 15:58:14 -05:00
412d3924eb
docs: document methods
2025-12-29 20:44:55 -05:00
aabe92f2dc
fix: cannot omit final newline
2025-12-29 20:17:50 -05:00
a2ce5b6897
feat: rename profiler to performance, typeless event emitter
2025-12-29 01:15:14 -05:00
c2b397a9f6
feat: observer pattern for statistics
2025-12-29 00:51:50 -05:00
6be3b7958a
feat: use iterative approach for reduce once
2025-12-28 02:37:22 -05:00
633d4a4d3b
fix: no stringify in hot loop
2025-12-28 02:19:48 -05:00
ee9e71d58e
fix: no ds store
2025-12-28 02:07:46 -05:00
0945cedf51
feat: only compute all free variables during a-conversion
2025-12-28 02:07:14 -05:00
4d81aca0b2
feat: fun little program
2025-12-28 00:53:43 -05:00
f4897d53a9
feat: it works!
2025-12-27 23:51:04 -05:00
f038d0a685
feat: parse saccharine, conversion incoming
2025-12-27 23:36:44 -05:00
14fc4b30da
feat: cleaner parsing functions
2025-12-27 20:46:10 -05:00
c37e96770f
feat: tokenizer accepts braces, line terminator, and equal sign
2025-12-27 19:52:18 -05:00
0e185fbf41
feat: expression
2025-12-27 03:43:19 -05:00
bf0edfc593
style: renamed token index to column
2025-12-27 02:43:17 -05:00
1896cd652d
feat: better error messages
2025-12-27 02:39:56 -05:00
884180de92
feat: error for when there is more source code than parsed
2025-12-27 02:08:18 -05:00
df53409887
fix: parameters converted in opposite order
2025-12-27 01:41:00 -05:00
5841023dde
fix: no log errors
2025-12-27 01:18:52 -05:00
a05a63627e
feat: better recursive descent
2025-12-27 01:18:06 -05:00
e3629acb45
feat: stuff
2025-12-26 03:37:05 -05:00
d427703afe
wip: new folder structure, overhaul language
2025-12-26 02:39:15 -05:00
11e7f70625
feat: stuff
2025-12-26 01:59:56 -05:00
fa44051dec
fix: don`t overlap "close"
2025-12-26 01:03:06 -05:00
c2ec9127e8
style: no capitalized error messages
2025-12-26 00:08:36 -05:00
17fa94113a
style: no capitalized error messages
2025-12-26 00:08:15 -05:00
d74894223e
fix: does need to compare to true
2025-12-26 00:07:10 -05:00
5ff8892d13
style: no underscores in variable names
2025-12-26 00:04:41 -05:00
44046e6abb
fix: drop zero-init of fresh name generator
2025-12-26 00:02:32 -05:00
c80587d522
style: unneeded else
2025-12-26 00:01:15 -05:00
6f3b252819
style: no "this" or "self" as receiver
2025-12-26 00:00:10 -05:00
e6e4a0df6f
style: no punctuation or capitalization in errors
2025-12-25 23:52:39 -05:00
32b1ba12f4
feat: golangci lint
2025-12-25 23:48:39 -05:00
d9deee0734
fix: cannot parse just a token
2025-12-25 02:00:04 -05:00
99703c2587
fix: unbound substitutions, explanation tag
2025-12-25 01:55:46 -05:00
88ee4f799e
feat: reducer works
2025-12-25 00:40:34 -05:00
d5999e8e1c
feat: reducer, but doesn`t work
2025-12-25 00:30:15 -05:00
2c3ce9baf7
feat: wogihrsoiuvjsroirgj
2025-12-24 14:55:33 -05:00
1d8ecba118
feat: parser
2025-12-23 21:54:42 -05:00
61bb622dcd
feat: tokenizer
2025-12-23 14:17:43 -05:00
