eval

package

v0.0.0-...-3085ebc Latest Latest Go to latest Published: Nov 10, 2022 License: MIT Imports: 8 Imported by: 0

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Repository

github.com/haifenghuang/magpie-language-design

Links

Open Source Insights

Documentation ¶

Index ¶

Constants
Variables
func IsTrue(obj Object) bool
type Array
- func (a *Array) Inspect() string
- func (a *Array) Type() ObjectType
type Boolean
- func NewBooleanObj(b bool) *Boolean
- func (b *Boolean) HashKey() HashKey
- func (b *Boolean) Inspect() string
- func (b *Boolean) Type() ObjectType
type Builtin
- func (b *Builtin) Inspect() string
- func (b *Builtin) Type() ObjectType
type BuiltinFunc
type Error
- func (e *Error) Inspect() string
- func (e *Error) Type() ObjectType
type Function
- func (f *Function) Inspect() string
- func (f *Function) Type() ObjectType
type Hash
- func NewHash() *Hash
- func (h *Hash) Inspect() string
- func (h *Hash) Type() ObjectType
type HashKey
type HashPair
type Hashable
type Nil
- func NewNil(s string) *Nil
- func (n *Nil) Inspect() string
- func (n *Nil) Type() ObjectType
type Number
- func NewNumber(f float64) *Number
- func (i *Number) HashKey() HashKey
- func (n *Number) Inspect() string
- func (n *Number) Type() ObjectType
type Object
- func Eval(node ast.Node, scope *Scope) (val Object)
type ObjectType
type ReturnValue
- func (rv *ReturnValue) Inspect() string
- func (rv *ReturnValue) Type() ObjectType
type Scope
- func NewScope(p *Scope, w io.Writer) *Scope
- func (s *Scope) DebugPrint(indent string)
- func (s *Scope) Del(name string)
- func (s *Scope) Get(name string) (Object, bool)
- func (s *Scope) GetKeys() []string
- func (s *Scope) Set(name string, val Object) Object
type String
- func NewString(s string) *String
- func (s *String) HashKey() HashKey
- func (s *String) Inspect() string
- func (s *String) Type() ObjectType

Constants ¶

View Source

const (
	NUMBER_OBJ       = "NUMBER"
	NIL_OBJ          = "NIL_OBJ"
	BOOLEAN_OBJ      = "BOOLEAN"
	STRING_OBJ       = "STRING"
	ERROR_OBJ        = "ERROR"
	RETURN_VALUE_OBJ = "RETURN_VALUE"
	FUNCTION_OBJ     = "FUNCTION"
	BUILTIN_OBJ      = "BUILTIN"
	ARRAY_OBJ        = "ARRAY"
	HASH_OBJ         = "HASH"
)

Variables ¶

View Source

var (
	ERR_ARGUMENT     = "wrong number of arguments. expected=%d, got=%d"
	ERR_INDEX        = "index error: '%d' out of range"
	ERR_PREFIXOP     = "unsupported operator for prefix expression:'%s' and type: %s"
	ERR_INFIXOP      = "unsupported operator for infix expression: %s '%s' %s"
	ERR_UNKNOWNIDENT = "unknown identifier: '%s' is not defined"
	ERR_DIVIDEBYZERO = "divide by zero"
	ERR_NOTFUNCTION  = "not a function: %s"
	ERR_NOINDEXABLE  = "index error: type %s is not indexable"
	ERR_KEY          = "key error: type %s is not hashable"
)

View Source

var (
	TRUE  = &Boolean{Bool: true}
	FALSE = &Boolean{Bool: false}
	NIL   = &Nil{}
)

Functions ¶

func IsTrue ¶

func IsTrue(obj Object) bool

Types ¶

type Array ¶

type Array struct {
	Members []Object
}

func (*Array) Inspect ¶

func (a *Array) Inspect() string

func (*Array) Type ¶

func (a *Array) Type() ObjectType

type Boolean ¶

type Boolean struct {
	Bool bool
}

func NewBooleanObj ¶

func NewBooleanObj(b bool) *Boolean

func (*Boolean) HashKey ¶

func (b *Boolean) HashKey() HashKey

func (*Boolean) Inspect ¶

func (b *Boolean) Inspect() string

func (*Boolean) Type ¶

func (b *Boolean) Type() ObjectType

type Builtin ¶

type Builtin struct {
	Fn BuiltinFunc
}

func (*Builtin) Inspect ¶

func (b *Builtin) Inspect() string

func (*Builtin) Type ¶

func (b *Builtin) Type() ObjectType

type BuiltinFunc ¶

type BuiltinFunc func(line string, scope *Scope, args ...Object) Object

type Error ¶

type Error struct {
	Message string
}

func (*Error) Inspect ¶

func (e *Error) Inspect() string

func (*Error) Type ¶

func (e *Error) Type() ObjectType

type Function ¶

type Function struct {
	Literal *ast.FunctionLiteral
	Scope   *Scope
}

func (*Function) Inspect ¶

func (f *Function) Inspect() string

func (*Function) Type ¶

func (f *Function) Type() ObjectType

type Hash ¶

type Hash struct {
	Pairs map[HashKey]HashPair
}

func NewHash ¶

func NewHash() *Hash

func (*Hash) Inspect ¶

func (h *Hash) Inspect() string

func (*Hash) Type ¶

func (h *Hash) Type() ObjectType

type HashKey ¶

type HashKey struct {
	Type  ObjectType
	Value uint64
}

type HashPair ¶

type HashPair struct {
	Key   Object
	Value Object
}

type Hashable ¶

type Hashable interface {
	HashKey() HashKey
}

type Nil ¶

type Nil struct {
}

func NewNil ¶

func NewNil(s string) *Nil

func (*Nil) Inspect ¶

func (n *Nil) Inspect() string

func (*Nil) Type ¶

func (n *Nil) Type() ObjectType

type Number ¶

type Number struct {
	Value float64
}

func NewNumber ¶

func NewNumber(f float64) *Number

func (*Number) HashKey ¶

func (i *Number) HashKey() HashKey

func (*Number) Inspect ¶

func (n *Number) Inspect() string

func (*Number) Type ¶

func (n *Number) Type() ObjectType

type Object ¶

type Object interface {
	Type() ObjectType
	Inspect() string
}

func Eval ¶

func Eval(node ast.Node, scope *Scope) (val Object)

type ObjectType ¶

type ObjectType string

object

type ReturnValue ¶

type ReturnValue struct {
	Value Object
}

func (*ReturnValue) Inspect ¶

func (rv *ReturnValue) Inspect() string

func (*ReturnValue) Type ¶

func (rv *ReturnValue) Type() ObjectType

type Scope ¶

type Scope struct {
	Writer io.Writer
	// contains filtered or unexported fields
}

func NewScope ¶

func NewScope(p *Scope, w io.Writer) *Scope

func (*Scope) DebugPrint ¶

func (s *Scope) DebugPrint(indent string)

func (*Scope) Del ¶

func (s *Scope) Del(name string)

func (*Scope) Get ¶

func (s *Scope) Get(name string) (Object, bool)

func (*Scope) GetKeys ¶

func (s *Scope) GetKeys() []string

Get all the keys of the scope.

func (*Scope) Set ¶

func (s *Scope) Set(name string, val Object) Object

type String ¶

type String struct {
	String string
}

func NewString ¶

func NewString(s string) *String

func (*String) HashKey ¶

func (s *String) HashKey() HashKey

func (*String) Inspect ¶

func (s *String) Inspect() string

func (*String) Type ¶

func (s *String) Type() ObjectType

Source Files ¶

View all Source files

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