This struct provides a namespace for constraint function signatures used with command‐line option values.

Synopsis

Declared in <balcl_constraint.h>

struct Constraint;

Description

The types defined here are used to impose user‐defined constraints on values associated with command‐line options. One type is defined for each scalar type defined in balcl::OptionType except for bool.

Type Aliases

Name

Description

CharConstraint

Functor type that validates char option values; see TimeConstraint.

DateConstraint

Functor type that validates bdlt::Date option values; see TimeConstraint.

DatetimeConstraint

Functor type that validates bdlt::Datetime option values; see TimeConstraint.

DoubleConstraint

Functor type that validates double option values; see TimeConstraint.

Int64Constraint

Functor type that validates Int64 option values; see TimeConstraint.

IntConstraint

Functor type that validates int option values; see TimeConstraint.

StringConstraint

Functor type that validates bsl::string option values; see TimeConstraint.

TimeConstraint

Functor type that validates bdlt::Time option values.

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