diff options
Diffstat (limited to 'tpl/math/math.go')
| -rw-r--r-- | tpl/math/math.go | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/tpl/math/math.go b/tpl/math/math.go index e7460e7ec..a1c12425f 100644 --- a/tpl/math/math.go +++ b/tpl/math/math.go @@ -23,6 +23,10 @@ import ( "github.com/spf13/cast" ) +var ( + errMustTwoNumbersError = errors.New("must provide at least two numbers") +) + // New returns a new instance of the math-namespaced template functions. func New() *Namespace { return &Namespace{} @@ -73,6 +77,10 @@ func (ns *Namespace) Log(n any) (float64, error) { // Max returns the greater of the multivalued numbers n1 and n2 or more values. func (ns *Namespace) Max(inputs ...any) (maximum float64, err error) { + if len(inputs) < 2 { + err = errMustTwoNumbersError + return + } var value float64 for index, input := range inputs { value, err = cast.ToFloat64E(input) @@ -91,6 +99,10 @@ func (ns *Namespace) Max(inputs ...any) (maximum float64, err error) { // Min returns the smaller of multivalued numbers n1 and n2 or more values. func (ns *Namespace) Min(inputs ...any) (minimum float64, err error) { + if len(inputs) < 2 { + err = errMustTwoNumbersError + return + } var value float64 for index, input := range inputs { value, err = cast.ToFloat64E(input) @@ -176,6 +188,9 @@ func (ns *Namespace) Sub(inputs ...any) (any, error) { } func (ns *Namespace) doArithmetic(inputs []any, operation rune) (value any, err error) { + if len(inputs) < 2 { + return nil, errMustTwoNumbersError + } value = inputs[0] for i := 1; i < len(inputs); i++ { value, err = _math.DoArithmetic(value, inputs[i], operation) |