---
title: "latex-build — Mova code model"
description: "Mova code model of latex/build.rs: components with their labels, obernants and the model text."
url: "https://groupants.elamur.ai/free/en/mova/latex/build.rs.groupant/"
---
Elamur: [Mova](https://md.mova.elamur.ai/free/en/) · [Dictionary](https://md.dictionary.elamur.ai/free/en/) · [Research](https://md.research.elamur.ai/free/en/) · **Groupants**

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# latex-build

The groupant beside latex/build.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
- **status:** partial source bound model
- **source:** [`latex/build.rs`](https://github.com/ElamurAI/mova-free/blob/main/latex/build.rs)
- **source SHA-256:** `39a1feed1af329d1…`
- **repository folder:** [`latex/build.rs.groupant`](https://github.com/ElamurAI/mova-free/tree/main/latex/build.rs.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` |
| **composition** | partial | [composition](#composition) |
| **descriptant** | present | [descriptant](#descriptant) |
| **invariant** | partial | [invariant](#invariant) |
| **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 |
|---|---|---|---|
| `behavior_complement` | behavior_complement | partial source derived model | [behavior_complement](#behavior-complement) |
| `reverse_reconstruction` | reverse_reconstruction | partial source derived model | [reverse_reconstruction](#reverse-reconstruction) |
| `canonical_selection` | canonical_selection | partial source derived model | [canonical_selection](#canonical-selection) |
| `duplicate_precedence` | duplicate_precedence | partial source derived model | [duplicate_precedence](#duplicate-precedence) |
| `generated_transport` | generated_transport | partial source derived model | [generated_transport](#generated-transport) |
| `effect_boundary` | effect_boundary | partial source derived model | [effect_boundary](#effect-boundary) |

## Parts

- [latex-build-stage0](https://md.groupants.elamur.ai/free/en/mova/latex/build.rs.groupant/stage0.groupant/)
- [latex-build-stage1](https://md.groupants.elamur.ai/free/en/mova/latex/build.rs.groupant/stage1.groupant/)
- [latex-build-stage2](https://md.groupants.elamur.ai/free/en/mova/latex/build.rs.groupant/stage2.groupant/)

## Model text


### descriptant

#### latex-build

En::canon/alt retain first form; variants retain first-seen order. main validates row arity, identifier, symbol uniqueness and class before forms; explicit characters claim slots before automatic text fallback. Fixed enum emission order avoids HashMap iteration nondeterminism; writes OUT_DIR/table.rs only after validation.

Epoch2026-10-31: full source reviewed before edits; prospective models retained externally. No optimization.

### approximant

#### Forward relation

En::canon/alt retain first form; variants retain first-seen order. main validates row arity, identifier, symbol uniqueness and class before forms; explicit characters claim slots before automatic text fallback. Fixed enum emission order avoids HashMap iteration nondeterminism; writes OUT_DIR/table.rs only after validation.

No useful approximate executable metric for exact categorical syntax; future caps1/2/5/10% only.

### invariant

#### Domain, invariant and cost

En::canon/alt retain first form; variants retain first-seen order. main validates row arity, identifier, symbol uniqueness and class before forms; explicit characters claim slots before automatic text fallback. Fixed enum emission order avoids HashMap iteration nondeterminism; writes OUT_DIR/table.rs only after validation.

A, A0 accepted; empty, lowercase initial, underscore and Unicode variant names rejected. Empty table can emit unusable empty enums; no whole-table semantic completeness guarantee.

Table bytes B, variants V, forms F: parsing O(B+V²) worst-case linear En::add membership plus expected hash operations; emitted bytes E retained O(B+F+E).

### composition

#### Composition

En::canon/alt retain first form; variants retain first-seen order. main validates row arity, identifier, symbol uniqueness and class before forms; explicit characters claim slots before automatic text fallback. Fixed enum emission order avoids HashMap iteration nondeterminism; writes OUT_DIR/table.rs only after validation.

Build generates table enums consumed by parser dispatch and printers. Lexer tokens feed macros and parser; parser returns AST whose equality ignores spans. Printers and gate compare that quotient, not original bytes. Shared parent syntax backs scoped stages; stages are byte-bound projections, not independent Rust modules.

### models

### behavior_complement

Duplicate form acceptance and overwrite of the first canonical form are excluded for validated successful compilation.

### reverse_reconstruction

Compatible inputs are tables with identical ordered variants, canonical first forms and lookup maps; comments, blank lines and redundant alternate canonical declarations can differ.

### canonical_selection

First form is retained separately for canonical and infix/plain forms.

### duplicate_precedence

Symbol identity and class checked before form duplication; references after whole pass.

### generated_transport

SYM arrays share row order and enum discriminants; include in table.rs consumes matching arrays.

### effect_boundary

Read table then validate and construct output, finally require OUT_DIR and write; errors panic without transaction guarantee.

### tests

#### Evidence — 2026-10-31

wave28_tests::canonical_first_form_and_variant_order; wave28_tests::variant_identifier_boundary

Selected library filters ast:: lex:: macros:: parse:: print:: table:: and integration gate excluding document_extraction_with_preamble_macros and random_token_soup_never_panics_and_roundtrips. Direct rustc --test latex/build.rs exercises private helpers. All selected tests twice debug/release with identical sorted names. Four compiled mutants at build/AST/parser/printer boundaries fail assertions then exact restoration passes. These do not individually cover every source. Build-main failure effects, allocation failures and universal roundtrip are unproved. Strict Clippy reports existing lints. No corpus/live VMM/API/GPU/full-school/held-out tests.