---
name: "YAML::PP::Constructor"
section: "3pm"
platform: "linux"
package: "perl-yaml-pp"
version: "0.43.0-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/YAML::PP::Constructor"
---

# YAML::PP::Constructor(3pm)

Constructing data structure from parsing events

## NAME

YAML::PP::Constructor - Constructing data structure from parsing events

## METHODS

- new

  The Constructor constructor

  ```
      my $constructor = YAML::PP::Constructor->new(
          schema => $schema,
          cyclic_refs => $cyclic_refs,
      );
  ```

- init

  Resets any data being used during construction.

  ```
      $constructor->init;
  ```

- document\_start\_event, document\_end\_event, mapping\_start\_event, mapping\_end\_event, sequence\_start\_event, sequence\_end\_event, scalar\_event, alias\_event, stream\_start\_event, stream\_end\_event

  These methods are called from YAML::PP::Parser:

  ```
      $constructor->document_start_event($event);
  ```

- anchors, set\_anchors

  Helper for storing anchors during construction

- docs, set\_docs

  Helper for storing resulting documents during construction

- stack, set\_stack

  Helper for storing data during construction

- cyclic\_refs, set\_cyclic\_refs

  Option for controlling the behaviour when finding circular references

- schema, set\_schema

  Holds a YAML::PP::Schema object

- stringify\_complex

  When constructing a hash and getting a non-scalar key, this method is used to stringify the key.

  It uses a terse Data::Dumper output. Other modules, like YAML::XS, use the default stringification, `ARRAY(0x55617c0c7398)` for example.