Module tag 

Datadog tag construction and validation.

Validation policy

The Datadog documentation defines more tag rules than this module enforces: https://docs.datadoghq.com/getting_started/tagging/#define-tags. Enforcing rules that tracing and profiling do not apply consistently would produce a worse user experience, so runtime validation currently rejects only empty tags and likely colon-related mistakes. Compile-time validation by the [tag!] macro is intentionally stricter.

Macros

const_assert

Asserts that constant expressions evaluate to true.

const_assert_ne

Asserts that constants are not equal in value.

Structs

InvalidTag

A tag rejected while validating a tag.

Tag

TagParser

An allocation-free iterator over validated tags in a comma- or space-separated string.

Enums

TagValidationError

Describes some reasons why a tag is invalid.

Functions

parse_tags

Parse a string of tags typically provided by environment variables The tags are expected to be either space or comma separated: “key1:value1,key2:value2” “key1:value1 key2:value2” Tag names and values are required and may not be empty.