Elamur Groupantsmlab-tests-octave-ext-block-extraction
The groupant beside mlab/tests/octave_ext.rs in the Mova repository: what the code computes, what it never does, how to go back from its outputs, its invariants, cost and checks.
Facts
Implementation material. A Mova code model describes this code at one source revision: partial models, finite checks and their stated scope. It is not a reviewed general exposition, and its labels are shown as written, never raised.
Components
| component | label | where |
|---|---|---|
| approximant | partial | approximant |
| ast | partial | ../syntax.json |
| cost | symbolic source derived | invariant |
| descriptant | present | descriptant |
| invariant | partial | invariant |
| tests | executed bounded checks | tests |
Obernants
The typed relations around the forward model: the behaviour complement (what the code never does), the reverse reconstruction (every input compatible with an output) and specialised views.
| id | type | label | where |
|---|---|---|---|
behavior_complement | behavior_complement | partial source derived model | behavior_complement |
reverse_reconstruction | reverse_reconstruction | partial source derived model | reverse_reconstruction |
state_invariant | state_invariant | partial source derived model | state_invariant |
failure_precedence | failure_precedence | partial source derived model | failure_precedence |
representation_transport | representation_transport | partial source derived model | representation_transport |
resource_cost | resource_cost | partial source derived model | resource_cost |
Model text
descriptant
mlab-tests-octave-ext-block-extraction
Group %! lines by known directive; shared replaces initialization, completed function appends definition, assert/test/error append blocks with current prefixes. Error strips id= and angle-bracket pattern.
Modeling epoch — 2026-10-31
Prospective source read preceded edits. Bounded synthetic checks and selected existing safe tests exercise actual code; paired debug/release results and compiled negative-control assertions are retained externally. Frozen scenario, corpus, external measurement, full-school and training effects are unexecuted. Partial lexical syntax supplies no macro-expanded or semantic proof.
approximant
Forward relation
Group %! lines by known directive; shared replaces initialization, completed function appends definition, assert/test/error append blocks with current prefixes. Error strips id= and angle-bracket pattern.
Domain
Valid Rust value/storage invariants and available bounded resources; exact branch and effect observations only.
Executable approximant gap
No useful percentage-error surrogate is established for these categorical, textual or effectful observations. Supported future caps are 1%, 2%, 5%, 10%; no executable approximation or production substitution is claimed.
invariant
Invariants and costs
Produced kind distinguishes Assert/Test/Error; no implementation evaluation or external file read in helper.
Failure ordering
Unclosed function is not appended to funcs; unsupported directives are ignored. This finite lexical transform has no Result channel.
Cost
O(input bytes + emitted repeated shared/function prefixes), potentially amplified by block count.
models
Typed models — mlab-tests-octave-ext-block-extraction
Source-derived partial relations; finite checks do not prove universality.
behavior_complement
Leading whitespace before %! excludes that line. Error pattern removal excludes enforcing regex expectation during this extraction.
reverse_reconstruction
Output block admits any discarded ordinary source text and ignored directive blocks; shared prefixes may originate from many whitespace spellings.
state_invariant
Produced kind distinguishes Assert/Test/Error; no implementation evaluation or external file read in helper.
failure_precedence
Unclosed function is not appended to funcs; unsupported directives are ignored. This finite lexical transform has no Result channel.
representation_transport
Input line order preserved; code is reconstructed with inserted newlines and shared variable empty initializers.
resource_cost
O(input bytes + emitted repeated shared/function prefixes), potentially amplified by block count.
tests
Evidence and limitations
Parent source checks: wave30_synthetic_selection_helpers. The fragment's actual statements lie in the recorded byte range; parent checks need not exercise every branch in this fragment. See ../tests.md for source-level control and limitations.
AST projection generated twice to fresh files and compared byte-for-byte. Runtime evidence is finite and does not establish every branch, allocation failure, backend implementation or effect path. No optimization or speed claim.
This page in Markdown → https://md.groupants.elamur.ai/free/en/mova/mlab/tests/octave_ext.rs.groupant/block-extraction.groupant/