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dsl: testing expression handling
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dsl/README.md
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@ -92,3 +92,23 @@ or configuration statements, and look like this:
* [ ] const parse
* [ ] live reload
* [ ] serialize modified code back to original indentation
## implementation notes
### `DslExp` trait behavior
this is the trait which differentiates "a thing" from
"a thing that is many things".
|source |key|exp |head |tail |
|-----------------------|---|-------|---------|---------------|
|`a` |`a`|E0 |`a` |none |
|`(a)` |E1 |`a` |`a` |none |
|`a b c` |E2 |E0 |`a` |`b c` |
|`(a b c)` |E0 |`a b c`|`(a b c)`|none |
|`(a b c) d e f` |E0 |E2 |`(a b c)`|`d e f` |
|`a (b c d) e f` |E2 |E0 |`a` |`(b c d) e f` |
* **E0**: Expected `(`
* **E1**: Unexpected `(`
* **E2**: Trailing characters