60 lines
1.6 KiB
Go
60 lines
1.6 KiB
Go
package object
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import "fmt"
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// Type represents the type of an object
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type ObjectType string
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const (
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INTEGER_OBJ = "int"
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BOOLEAN_OBJ = "bool"
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NULL_OBJ = "null"
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RETURN_VALUE_OBJ = "return"
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ERROR_OBJ = "error"
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FUNCTION_OBJ = "fn"
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STRING_OBJ = "str"
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BUILTIN_OBJ = "builtin"
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ARRAY_OBJ = "array"
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HASH_OBJ = "hash"
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COMPILED_FUNCTION_OBJ = "COMPILED_FUNCTION"
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CLOSURE_OBJ = "closure"
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)
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// Comparable is the interface for comparing two Object and their underlying
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// values. It is the responsibility of the caller (left) to check for types.
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// Returns `true` iif the types and values are identical, `false` otherwise.
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type Comparable interface {
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Compare(other Object) int
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}
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// Sizeable is the interface for returning the size of an Object.
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// Object(s) that have a valid size must implement this interface and the
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// Len() method.
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type Sizeable interface {
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Len() int
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}
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// Immutable is the interface for all immutable objects which must implement
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// the Clone() method used by binding names to values.
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type Immutable interface {
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Clone() Object
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}
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// Object represents a value and implementations are expected to implement
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// `Type()` and `Inspect()` functions
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type Object interface {
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fmt.Stringer
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Type() ObjectType
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Bool() bool
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Inspect() string
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}
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// Hashable is the interface for all hashable objects which must implement
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// the HashKey() method which returns a HashKey result.
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type Hashable interface {
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HashKey() HashKey
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}
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// BuiltinFunction represents the builtin function type
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type BuiltinFunction func(args ...Object) Object
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