func NewCompiler(env *environment.EnvSet) Compiler {
	return &compiler{
		varEnvs: mustBuildEnvs(env),
	}
}

// CompileClaimsExpression compiles the given expressionAccessor into a CEL program that can be evaluated.
// The claims CEL variable is available to the expression.
func (c compiler) CompileClaimsExpression(expressionAccessor ExpressionAccessor) (CompilationResult, error) {
	return c.compile(expressionAccessor, claimsVarName)
}

	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			for _, expressionAccessor := range tc.expressionAccessors {
				_, err := compiler.CompileClaimsExpression(expressionAccessor)
				if err != nil {
					t.Errorf("unexpected error: %v", err)
				}
			}
		})
	}
}

func TestCompileUserExpression(t *testing.T) {
	testCases := []struct {

	EvalResult         ref.Val
	ExpressionAccessor ExpressionAccessor
}

// Compiler provides a CEL expression compiler configured with the desired authentication related CEL variables.
type Compiler interface {
	CompileClaimsExpression(expressionAccessor ExpressionAccessor) (CompilationResult, error)
	CompileUserExpression(expressionAccessor ExpressionAccessor) (CompilationResult, error)
}

func compileClaimsCELExpression(compiler authenticationcel.Compiler, expression authenticationcel.ExpressionAccessor, fldPath *field.Path) (*authenticationcel.CompilationResult, *field.Error) {
	compilationResult, err := compiler.CompileClaimsExpression(expression)
	if err != nil {
		return nil, convertCELErrorToValidationError(fldPath, expression.GetExpression(), err)
	}
	return &compilationResult, nil
}