Function GetBuiltinFunctionType

builtin/builtin.go:182–190

GetBuiltinFunctionType returns the type of a builtin function. The type may contain type variables.

(sym ast.FunctionSym)

// GetBuiltinFunctionType returns the type of a builtin function.
// The type may contain type variables.
func GetBuiltinFunctionType(sym ast.FunctionSym) (ast.BaseTerm, bool) {
	if tpe, ok := Functions[sym]; ok {
		return tpe, true
	}
	if tpe, ok := Functions[ast.FunctionSym{sym.Symbol, -1}]; ok {
		return tpe, true // variable arity
	}
	return nil, false
}

// IsBuiltinFunction returns true if sym is a builtin function.
func IsBuiltinFunction(sym ast.FunctionSym) bool {