24 lines
980 B
Go
24 lines
980 B
Go
package datatype
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import (
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"reflect"
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)
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// Validator returns whether a given value fulfills the datatype
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// and casts the value into a common go type.
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//
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// for example, if a validator checks for upper case strings,
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// whether the value is a []byte, a string or a []rune, if the
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// value matches the validator's checks, it will be cast it into
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// a common go type, say, string.
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type Validator func(value interface{}) (cast interface{}, valid bool)
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// T represents a datatype. The Build function returns a Validator if
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// it manages types with the name `typeDefinition` (from the configuration field "type"); else it or returns NIL if the type
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// definition does not match this datatype; the registry is passed to allow recursive datatypes (e.g. slices, structs, etc)
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// The datatype's validator (when input is valid) must return a cast's go type matching the `Type() reflect.Type`
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type T interface {
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Type() reflect.Type
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Build(typeDefinition string, registry ...T) Validator
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}
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