Module validators 

Format validators for well-known string constraints.

These validators implement the format checking logic used by buf.validate well-known string rules. They are exposed publicly so that generated validation code (from prost-protovalidate-build) can call them directly without reimplementing the validation logic.

Functions

fieldmask_covers

Returns true if path is covered by candidate under FieldMask path-coverage semantics — either path equals candidate, or candidate is a prefix of path at a path-segment boundary (i.e. path == "{candidate}.{rest}").

is_email

Returns true if s is a valid email address.

is_host_and_port

Returns true if s is a valid host:port pair.

is_hostname

Returns true if s is a valid hostname per RFC 1123.

is_http_header_name

Returns true if s is a valid HTTP header name.

is_http_header_value

Returns true if s is a valid HTTP header value.

is_ip

Returns true if s is a valid IPv4 or IPv6 address.

is_ip_prefix

Returns true if s is a valid IPv4 or IPv6 CIDR prefix (e.g. 192.168.0.0/16).

is_ipv4

Returns true if s is a valid IPv4 address.

is_ipv6

Returns true if s is a valid IPv6 address (including zone IDs).

is_ipv4_prefix

Returns true if s is a valid IPv4 CIDR prefix (e.g. 10.0.0.0/8).

is_ipv6_prefix

Returns true if s is a valid IPv6 CIDR prefix (e.g. 2001:db8::/32).

is_tuuid

Returns true if s is a valid trimmed UUID (32 hex digits, no hyphens).

is_ulid

Returns true if s is a valid ULID (26 Crockford base32 characters).

is_uri

Returns true if s is a valid absolute URI per RFC 3986.

is_uri_ref

Returns true if s is a valid URI reference (absolute or relative) per RFC 3986.

is_uuid

Returns true if s is a valid UUID in 8-4-4-4-12 hex format.