---
name: "Pprintast.Doc"
section: "3o"
platform: "linux"
package: "ocaml"
version: "5.5.0-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/Pprintast.Doc"
---

# Pprintast.Doc(3o)

Format\_doc functions for error messages

## NAME

Pprintast.Doc - Format\_doc functions for error messages

## Module

Module   Pprintast.Doc

## Documentation

Module **Doc**\
  :  **sig end**

**Format\_doc** functions for error messages

*val longident* :  **Longident.t Format\_doc.printer**

*val constr* :  **Longident.t Format\_doc.printer**

*val tyvar* :  **string Format\_doc.printer**

*val nominal\_exp* :  **Parsetree.expression -\> Format\_doc.t option**

Returns a format document if the expression reads nicely as the subject of a sentence in a error message.