claude@clouddev1
bbe12524ab
Replaces the `ParseError::Invalid::expected: Vec<String>`
round-trip with structured `Expectation`s direct from the walker
(ADR-0024 §architecture). The completion engine no longer parses
formatted strings back into types — `Expectation::Ident { source,
role }`, `Expectation::Word`, `Expectation::Literal`,
`Expectation::Flag`, `Expectation::NumberLit`, and
`Expectation::StringLit` are consumed as enum variants.
New helper:
- `walker::expected_at_input(source) -> Vec<Expectation>`
consolidates the empty-input case (returns every CommandNode
entry word), unknown-command-word case (also entry words), and
walker-engaged case (Incomplete / Mismatch expectations) in one
place. ValidationFailed and Match resolve to empty.
`completion.rs` refactor:
- `expected_at(leading)` wraps the walker helper; replaces the
legacy string-based `expected_set`.
- Keyword candidates: filter `Expectation::Word(w)` /
`Expectation::Literal(s)` to alphabetic-only literals (no
more string-parsing / `strip_backticks`).
- Type names: detect `Expectation::Ident { source:
IdentSource::Types }` directly (replaces the `TYPE_SLOT_LABEL`
magic string).
- Flag candidates: read `Expectation::Flag(body)` and format
as `--{body}` (replaces backticked-string matching).
- Composite-literal candidates: match against
`Expectation::Literal("1")` (replaces the backticked-string
`` `1` ``).
- Schema identifiers: `Expectation::Ident { source, .. }`
filtered by `source.completes_from_schema()`.
- `is_value_literal_signature` checks for `Expectation::Word`
values "null"/"true"/"false" and `Expectation::NumberLit` +
`Expectation::StringLit` variants (replaces backticked-string
matching).
- `invalid_ident_at_cursor` and `typing_name_at_cursor` adopt
the same path.
The `typing_name_at_cursor` probe (substitute placeholder and
re-parse) still goes through `parse_command` because the probe
specifically wants the *post-name* expected set — `parse_command`
+ the string `expected` field carries that today. A future
follow-up could thread the structured probe through `walker`,
but the value-add is marginal.
`COMPOSITE_CANDIDATES` opener key changes from `` `1` `` (the
backticked-string the chumsky parser produced) to bare `"1"`
(the Expectation::Literal payload).
Touched modules: `dsl/walker/mod.rs` (new export),
`src/completion.rs` (refactor).
Tests: 806 passing, 0 failing, 1 ignored — every existing
completion test passes unchanged, proving the structured path
is behaviour-preserving. Clippy clean.