go/src/cmd/compile/internal/ir/val.go

func ConstType(n Node) constant.Kind { … }

// IntVal returns v converted to int64.
// Note: if t is uint64, very large values will be converted to negative int64.
func IntVal(t *types.Type, v constant.Value) int64 { … }

func AssertValidTypeForConst(t *types.Type, v constant.Value) { … }

func ValidTypeForConst(t *types.Type, v constant.Value) bool { … }

var OKForConst …

// Int64Val returns n as an int64.
// n must be an integer or rune constant.
func Int64Val(n Node) int64 { … }

// Uint64Val returns n as a uint64.
// n must be an integer or rune constant.
func Uint64Val(n Node) uint64 { … }

// BoolVal returns n as a bool.
// n must be a boolean constant.
func BoolVal(n Node) bool { … }

// StringVal returns the value of a literal string Node as a string.
// n must be a string constant.
func StringVal(n Node) string { … }