Elamur Groupantsmlab-tests-octave-ext
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 |
| composition | partial | composition |
| 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 |
Parts
Model text
descriptant
mlab-tests-octave-ext
External Octave test extraction, lexical scope filter and subprocess report harness; only synthetic extraction helpers run here.
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
files recursively sorts candidate m/cc paths. blocks collects column-zero %! directives with shared initialization and accumulated functions; calls/assigned approximate builtin scope. Ignored measurement launches timeout per selected block and classifies hang/crash/error/assert/pass.
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
Current synthetic checks invoke blocks/calls/assigned only. No OCTAVE_TESTS/OCTAVE_OUT corpus discovery, subprocess measurement or external data is used.
Failure ordering
Directory read failure returns silently, file read defaults empty. timeout124 takes precedence over crash then expected-error then normal success/assert/error. Process launch errors panic.
Cost
Helper scans O(text bytes) plus accumulated prefix copies; external traversal and per-block subprocess limit ten seconds are unexecuted effects. Output memory grows with report rows.
composition
Composition
files recursively sorts candidate m/cc paths. blocks collects column-zero %! directives with shared initialization and accumulated functions; calls/assigned approximate builtin scope. Ignored measurement launches timeout per selected block and classifies hang/crash/error/assert/pass.
Scope names use HashSet membership; files sorted before processing. Expected-error pattern/id is stripped without matching actual error text.
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.
Boundary: Produced kind distinguishes Assert/Test/Error; no implementation evaluation or external file read in helper.
Interaction limit
Local fragment relations compose only with valid Value storage, caller error propagation and delegated providers. They do not establish whole-interpreter or host-filesystem guarantees.
models
Typed models — mlab-tests-octave-ext
Source-derived partial relations; finite checks do not prove universality.
behavior_complement
Non-column-zero %! excludes extraction. Unknown directives exclude ordinary test output. Calls filter excludes double-quoted text but does not exclude all comments or single-quoted strings; it is no parser proof.
reverse_reconstruction
Same blocks admit arbitrary non-%! implementation text and ignored directives; same call-name set admits many syntactic forms. Report status cannot reconstruct process stderr, only truncated first-error detail survives.
state_invariant
Current synthetic checks invoke blocks/calls/assigned only. No OCTAVE_TESTS/OCTAVE_OUT corpus discovery, subprocess measurement or external data is used.
failure_precedence
Directory read failure returns silently, file read defaults empty. timeout124 takes precedence over crash then expected-error then normal success/assert/error. Process launch errors panic.
representation_transport
Scope names use HashSet membership; files sorted before processing. Expected-error pattern/id is stripped without matching actual error text.
resource_cost
Helper scans O(text bytes) plus accumulated prefix copies; external traversal and per-block subprocess limit ten seconds are unexecuted effects. Output memory grows with report rows.
tests
Evidence and limitations
Selected named outcomes: wave30_synthetic_selection_helpers. Each ran twice debug and twice release with sorted identical nonempty outcomes and numeric exit 0. Source-specific compiled control exercised "wave30_synthetic_selection_helpers": compile exit 0, assertion-red exit 101, exact-restored rerun exit 0. External receipts: octopus-wave30-io-2026-10-31 (native-commands.json, positive-receipts.json, controls.json).
Scope: Current synthetic checks invoke blocks/calls/assigned only. No OCTAVE_TESTS/OCTAVE_OUT corpus discovery, subprocess measurement or external data is used.
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/