---
title: "gutenberg-text-command-csv-dates — Mova code model"
description: "Mova code model of tools/gutenberg/src/main.rs: components with their labels, obernants and the model text."
url: "https://groupants.elamur.ai/free/en/mova/tools/gutenberg/src/main.rs.groupant/csv-dates.groupant/"
---
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# gutenberg-text-command-csv-dates

The groupant beside tools/gutenberg/src/main.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

- **kind:** groupant_fragment
- **status:** partial source bound model
- **source:** [`tools/gutenberg/src/main.rs`](https://github.com/ElamurAI/mova-free/blob/main/tools/gutenberg/src/main.rs)
- **source SHA-256:** `cc6e3c082c5ad468…`
- **covers:** Quoted char scanner handles doubled quote, comma/newline only outside quotes, ignores outside CR. EOF emits iff field or row nonempty. death_years splits semicolons; BCE->0; last hyphen numeric prefix>0, otherwise whole None. (bytes 1937–5228)
- **part of:** [gutenberg-text-command](https://md.groupants.elamur.ai/free/en/mova/tools/gutenberg/src/main.rs.groupant/)
- **repository folder:** [`tools/gutenberg/src/main.rs.groupant/csv-dates.groupant`](https://github.com/ElamurAI/mova-free/tree/main/tools/gutenberg/src/main.rs.groupant/csv-dates.groupant)
- **repository commit:** `48f2e6f74146`

> **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](#approximant) |
| **ast** | partial | `../syntax.json` |
| **cost** | symbolic source derived | [invariant-and-cost](#invariant-and-cost) |
| **descriptant** | present | [descriptant](#descriptant) |
| **invariant** | partial | [invariant-and-cost](#invariant-and-cost) |
| **tests** | executed bounded checks | [tests](#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 |
|---|---|---|---|
| `gutenberg-text-command-csv-dates-behavior_complement` | behavior_complement | partial source derived model | [behavior_complement](#behavior-complement) |
| `gutenberg-text-command-csv-dates-reverse_reconstruction` | reverse_reconstruction | partial source derived model | [reverse_reconstruction](#reverse-reconstruction) |
| `gutenberg-text-command-csv-dates-quote_escape_transition` | quote_escape_transition | partial source derived model | [quote_escape_transition](#quote-escape-transition) |
| `gutenberg-text-command-csv-dates-empty_eof_partition` | empty_eof_partition | partial source derived model | [empty_eof_partition](#empty-eof-partition) |
| `gutenberg-text-command-csv-dates-last_hyphen_date` | last_hyphen_date | partial source derived model | [last_hyphen_date](#last-hyphen-date) |
| `gutenberg-text-command-csv-dates-bce_short_circuit` | bce_short_circuit | partial source derived model | [bce_short_circuit](#bce-short-circuit) |

## Model text


### descriptant

#### gutenberg-text-command-csv-dates

##### Epoch 2026-10-31

Full source read preceded changes. Prospective model predicted branch/order, resource and information-loss behavior. Tests exercise actual helpers on bounded synthetic inputs; command workflows remain unexecuted. Production source prefix is preserved; only inline tests added.

Quoted char scanner handles doubled quote, comma/newline only outside quotes, ignores outside CR. EOF emits iff field or row nonempty. death_years splits semicolons; BCE->0; last hyphen numeric prefix>0, otherwise whole None.

Executable percentage approximation is unsupported: categorical parsing/effects have no useful certified metric here. Partial syntax excludes macro expansion and name resolution.

### approximant

#### Forward relation

Quoted char scanner handles doubled quote, comma/newline only outside quotes, ignores outside CR. EOF emits iff field or row nonempty. death_years splits semicolons; BCE->0; last hyphen numeric prefix>0, otherwise whole None.

##### Domain

UTF-8 strings and dates fitting u32; malformed quotes accepted.

### models

## Typed source models

All models are partial source-derived relations at this manifest snapshot. Scope is one call/trace under the stated domain; no universal semantic proof.

### behavior_complement

Quoted comma/newline cannot split a field; an undated nonempty author excludes Some even if earlier entries dated.

Domain: UTF-8 strings and dates fitting u32; malformed quotes accepted. Observation: Quote state and field buffer determine separators; no syntax error result. Date vector retains person order and cardinality of nonempty entries. Assumptions: bounded resources and source branch semantics. Oracle: selected actual-helper tests in tests.md constrain only their finite fixtures; remaining branches are source-derived.

### reverse_reconstruction

Rows admit quoted/unquoted spellings, ignored CR and optional trailing newline. A year vector admits arbitrary names and date prefixes; None cannot identify which entry failed.

Domain: UTF-8 strings and dates fitting u32; malformed quotes accepted. Observation: Quote state and field buffer determine separators; no syntax error result. Date vector retains person order and cardinality of nonempty entries. Assumptions: bounded resources and source branch semantics. Oracle: selected actual-helper tests in tests.md constrain only their finite fixtures; remaining branches are source-derived.

### quote_escape_transition

Inside quotes two quotes append one literal and consume both; a single quote leaves quoted state.

Domain: UTF-8 strings and dates fitting u32; malformed quotes accepted. Observation: Quote state and field buffer determine separators; no syntax error result. Date vector retains person order and cardinality of nonempty entries. Assumptions: bounded resources and source branch semantics. Oracle: selected actual-helper tests in tests.md constrain only their finite fixtures; remaining branches are source-derived.

### empty_eof_partition

Empty input and a sole empty quoted field produce no rows; comma produces two empty fields; newline produces one empty field.

Domain: UTF-8 strings and dates fitting u32; malformed quotes accepted. Observation: Quote state and field buffer determine separators; no syntax error result. Date vector retains person order and cardinality of nonempty entries. Assumptions: bounded resources and source branch semantics. Oracle: selected actual-helper tests in tests.md constrain only their finite fixtures; remaining branches are source-derived.

### last_hyphen_date

rsplit_once chooses last hyphen; skip nondigits then take digits; suffix annotations are discarded and zero rejects.

Domain: UTF-8 strings and dates fitting u32; malformed quotes accepted. Observation: Quote state and field buffer determine separators; no syntax error result. Date vector retains person order and cardinality of nonempty entries. Assumptions: bounded resources and source branch semantics. Oracle: selected actual-helper tests in tests.md constrain only their finite fixtures; remaining branches are source-derived.

### bce_short_circuit

Any entry containing literal BCE contributes0 before hyphen parse, including malformed surrounding date text.

Domain: UTF-8 strings and dates fitting u32; malformed quotes accepted. Observation: Quote state and field buffer determine separators; no syntax error result. Date vector retains person order and cardinality of nonempty entries. Assumptions: bounded resources and source branch semantics. Oracle: selected actual-helper tests in tests.md constrain only their finite fixtures; remaining branches are source-derived.


### tests

#### Evidence

Selected exact tests: ["tests::csv_and_death_years","wave33::csv_boundaries_and_date_fibers"].

Each runs twice in debug and twice in release with normalized named outcomes compared. Compiled production-boundary mutants are recorded in the external wave33 text receipts with original/restored hashes and positive reruns. Existing negative assertions are separate from compiled mutants. No CLI, download, teacher, corpus or model execution. For this fragment, source-derived paths not reached by these tests remain unverified.

### invariant-and-cost

#### Invariant and cost

##### Invariant

Quote state and field buffer determine separators; no syntax error result. Date vector retains person order and cardinality of nonempty entries.

##### Cost

O(B) Unicode scanning and allocated output; last-hyphen searches across entries sum O(B).

Arithmetic and allocation premises are conditional. No timing or percentage surrogate claimed.