Crate configbuilder_pattern_substitution 

configbuilder-pattern-substitution — the substitution domain’s trait contract (SubstitutionPolicy, ValueResolver, PolicyCatalog, SubstitutionError) and its reference implementation (AllowAllPolicy, CompositePolicy, PatternWhitelistPolicy, PrefixWhitelistPolicy, EnvValueResolver, Substituter) — pure string/regex/env logic, no real technology-specific alternative exists, so there is no configbuilder-svc counterpart for this domain.

Structs

CompositePolicy

Combines multiple SubstitutionPolicy implementations with AND logic.

EnvValueResolver

Default ValueResolver — resolves variables from the process environment via std::env::var.

PatternWhitelistPolicy

Allows only environment variables whose names fully match a regular expression.

PrefixWhitelistPolicy

Allows only environment variables whose names start with one of the given prefixes.

Substituter

Performs value substitution on a string value.

Enums

SubstitutionError

Error type for environment variable substitution failures.

Traits

PolicyCatalog

Contract binding the substitution policy and error type family.

SubstitutionPolicy

Policy for controlling which environment variables may be substituted into config values.

ValueResolver

Resolves a substitution variable name to its value.