This inheritance list is sorted roughly, but not completely, alphabetically:

[detail level 123]

Ccli::Action< Fns >	A compile-time pipeline of action functions applied sequentially to a parsed token
Ccli::Action<>
Ccli::ActionCtx< T >	Context passed to each action function during pipeline execution
Ccli::ActionCtx< void >	Partial specialisation of ActionCtx used for intermediate pipeline steps
Ccli::ActionResult< T >	The result type produced and consumed at each step of an action pipeline
Ccli::ActionResult< void >	Specialisation of ActionResult for terminal (pack) actions that produce no value
Ccli::ArgParameter< T >	Parameter bag used when constructing ArgImpl or PositionalImpl with named fields
Ccli::conversion::Bool	Converts a string token to bool
Ccli::pack::Callback< Fn >	Invokes a compile-time callable Fn with the parsed value as a terminal action
Ccli::conversion::Choice< T, Mapper >	Converts a string token to type T via a user-supplied mapper function
Ccli::Parser< T >::Lookup::CommandEntry
Ccli::CommandParameter	Parameter bag used when constructing a Command field
Ccli::ConflictsRelation
Ccli::ConstraintResult	The result type returned by a constraints() post-parse hook
Ccli::action::Custom< Fn >	Wraps a user-defined callable as a non-terminal action pipeline step
Ccli::conversion::DefaultMissingValue< Value >	Injects a compile-time default value when an option is invoked as a flag (no value provided)
Ccli::DependsOnRelation
Ccli::conversion::ExistingDirectory	Converts a string token to std::filesystem::path, requiring the path to exist and be a directory
Ccli::conversion::ExistingFile	Converts a string token to std::filesystem::path, requiring the path to exist and be a regular file
Ccli::validation::Exists	Validates that a std::filesystem::path exists on the filesystem
Ccli::action::ExitSuccess	Terminates the pipeline by returning a ParseError with code exit_success (or help_requested when preceded by PrintHelp)
Ccli::pack::Extend
Cstd::false_type
Ccli::IsRelationSet< RelationSet< Relations... > >
Ccli::IsRelationSet< T >
Ccli::conversion::Floating< T >	Converts a string token to a floating-point type T using std::from_chars
Ccli::GroupParams
Ccli::GroupRelation
Ccli::HelpPalette	ANSI palette used by generated help output
Ccli::pack::Increment	Increments a std::size_t counter each time the option is seen
Ccli::pack::Insert	Inserts the value into a std::set<T> (duplicates are silently ignored by the set)
Ccli::pack::InsertOrAssign
Ccli::conversion::Integer< T >	Converts a string token to an integral type T using std::from_chars
Cstd::integral_constant
Cstd::tuple_size< cli::conversion::NegatableResult >
Ccli::validation::IsDirectory	Validates that a std::filesystem::path refers to a directory
Ccli::validation::IsRegularFile	Validates that a std::filesystem::path refers to a regular file
Ccli::pack::MarkPresent	Sets a bool flag to true when the option is seen, regardless of value
Ccli::validation::Matches< Pattern >	Validates that the input string matches a compile-time regular expression
Ccli::validation::Max< MaxValue >	Validates that the input value is less than or equal to MaxValue
Ccli::validation::Min< MinValue >	Validates that the input value is greater than or equal to MinValue
Ccli::NameList< Max >
Ccli::Nargs	Specifies the minimum and maximum number of values an option or positional accepts
Ccli::conversion::Negatable< Prefix >	Converts a string token to NegatableResult by detecting a compile-time negation prefix
Ccli::conversion::NegatableResult	Result of the negatable<> conversion
Ccli::validation::NonEmpty	Validates that the input value is not empty (requires .empty() member)
Ccli::validation::NonNegative	Validates that the input value is non-negative (>= 0)
Ccli::validation::NotBlank	Validates that the input string is not blank (not all whitespace)
Ccli::validation::OneOf< Allowed >	Validates that the input value equals one of the compile-time constants Allowed
Ccli::Parser< T >::Lookup::OptionEntry
Ccli::validation::ParentExists	Validates that the parent directory of a std::filesystem::path exists
Ccli::ParseError	Carries all context about a single parse/validation failure
Ccli::Parser< T >	The main parsing engine for a typed argument specification
Ccli::ParseResult< T >	The result returned by Parser::parse() and the free cli::parse() function
Ccli::conversion::Path	Converts a string token to std::filesystem::path without filesystem validation
Ccli::validation::Positive	Validates that the input value is strictly positive (> 0)
Ccli::validation::Predicate< Pred >	Validates a value using a user-supplied compile-time predicate
Ccli::action::PrintHelp	Wraps the current value in a HelpRequested<T> sentinel type
Ccli::pack::Push	Appends the value to a std::vector<T>
Ccli::pack::PushUnique	Appends the value to a std::vector<T>, rejecting duplicate values
Ccli::validation::Range< MinValue, MaxValue >	Validates that the input value is within the closed interval [MinValue, MaxValue]
Ccli::RecurseHelpTag	Tag type passed to format_help() to request recursive sub-command output
Ccli::pack::RejectDuplicate	Passes the value through unchanged, but returns ErrorCode::duplicate_argument if the option has been seen more than once
Ccli::RelationSet< Relations >
Ccli::pack::SetFalse	Sets the bool storage to false
Ccli::pack::SetOnce	Stores the input value and rejects subsequent occurrences
Ccli::pack::SetTrue	Sets the bool storage to true
Ccli::TokenizeResult::SmallVector< T, N >
Ccli::SpecMemberTag	Base tag for all members that may appear in an argument specification struct
Ccli::CommandTag	Tag base class for subcommand fields
Ccli::Command< Name, T >	A named subcommand that nests another argument specification
Ccli::DescriptionTag	Tag base class for the Description field that provides the CLI's help text
Ccli::Description	A DescriptionTag field that carries the top-level CLI description
Ccli::OptionTag	Tag base class for command-line option/flag fields
Ccli::PositionalTag	Tag base class for positional argument fields
Ccli::PositionalImpl< N, detail::PositionalActionFor< T, N >::value >
Ccli::PositionalImpl< N, A >
Ccli::pack::InsertOrAssign::StorageTypeImpl< Prev, bool >
Ccli::pack::InsertOrAssign::StorageTypeImpl< Prev, true >
Ccli::pack::StoreInto< T >	Writes the value directly into an external variable via a T* pointer
Ccli::conversion::String	Converts a string_view token to a std::string by copying
Ccli::StringLiteral< N >	Compile-time string type usable as a non-type template parameter
Ccli::pack::Toggle	Flips the bool storage each time the option is seen
Ccli::Token	A single token produced by tokenize()
Ccli::TokenizerConfig	Controls how tokenize() recognises option and separator syntax
Ccli::TokenizeResult	The result returned by tokenize()
Cstd::true_type
Ccli::IsRelationSet< RelationSet< Relations... > >
Cstd::tuple_element< 0, cli::conversion::NegatableResult >
Cstd::tuple_element< 1, cli::conversion::NegatableResult >
Ccli::T
Ccli::Command< Name, T >	A named subcommand that nests another argument specification