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https://github.com/letic/terraform-provider-google.git
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123 lines
2.8 KiB
Go
123 lines
2.8 KiB
Go
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package cty
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import "math/big"
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// primitiveType is the hidden implementation of the various primitive types
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// that are exposed as variables in this package.
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type primitiveType struct {
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typeImplSigil
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Kind primitiveTypeKind
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}
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type primitiveTypeKind byte
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const (
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primitiveTypeBool primitiveTypeKind = 'B'
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primitiveTypeNumber primitiveTypeKind = 'N'
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primitiveTypeString primitiveTypeKind = 'S'
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)
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func (t primitiveType) Equals(other Type) bool {
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if otherP, ok := other.typeImpl.(primitiveType); ok {
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return otherP.Kind == t.Kind
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}
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return false
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}
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func (t primitiveType) FriendlyName() string {
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switch t.Kind {
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case primitiveTypeBool:
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return "bool"
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case primitiveTypeNumber:
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return "number"
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case primitiveTypeString:
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return "string"
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default:
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// should never happen
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panic("invalid primitive type")
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}
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}
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func (t primitiveType) GoString() string {
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switch t.Kind {
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case primitiveTypeBool:
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return "cty.Bool"
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case primitiveTypeNumber:
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return "cty.Number"
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case primitiveTypeString:
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return "cty.String"
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default:
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// should never happen
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panic("invalid primitive type")
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}
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}
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// Number is the numeric type. Number values are arbitrary-precision
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// decimal numbers, which can then be converted into Go's various numeric
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// types only if they are in the appropriate range.
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var Number Type
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// String is the string type. String values are sequences of unicode codepoints
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// encoded internally as UTF-8.
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var String Type
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// Bool is the boolean type. The two values of this type are True and False.
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var Bool Type
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// True is the truthy value of type Bool
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var True Value
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// False is the falsey value of type Bool
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var False Value
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// Zero is a number value representing exactly zero.
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var Zero Value
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// PositiveInfinity is a Number value representing positive infinity
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var PositiveInfinity Value
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// NegativeInfinity is a Number value representing negative infinity
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var NegativeInfinity Value
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func init() {
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Number = Type{
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primitiveType{Kind: primitiveTypeNumber},
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}
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String = Type{
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primitiveType{Kind: primitiveTypeString},
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}
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Bool = Type{
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primitiveType{Kind: primitiveTypeBool},
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}
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True = Value{
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ty: Bool,
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v: true,
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}
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False = Value{
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ty: Bool,
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v: false,
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}
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Zero = Value{
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ty: Number,
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v: big.NewFloat(0),
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}
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PositiveInfinity = Value{
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ty: Number,
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v: (&big.Float{}).SetInf(false),
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}
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NegativeInfinity = Value{
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ty: Number,
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v: (&big.Float{}).SetInf(true),
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}
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}
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// IsPrimitiveType returns true if and only if the reciever is a primitive
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// type, which means it's either number, string, or bool. Any two primitive
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// types can be safely compared for equality using the standard == operator
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// without panic, which is not a guarantee that holds for all types. Primitive
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// types can therefore also be used in switch statements.
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func (t Type) IsPrimitiveType() bool {
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_, ok := t.typeImpl.(primitiveType)
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return ok
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}
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