expr/utils.go

// Copyright (c) 2024 Celestino Amoroso (celestino.amoroso@gmail.com).
// All rights reserved.

// utils.go
package expr

func isString(v any) (ok bool) {
	_, ok = v.(string)
	return ok
}

func isInteger(v any) (ok bool) {
	_, ok = v.(int64)
	return ok
}

func isFloat(v any) (ok bool) {
	_, ok = v.(float64)
	return ok
}

func isNumber(v any) (ok bool) {
	return isFloat(v) || isInteger(v)
}

func isNumberString(v any) (ok bool) {
	return isString(v) || isNumber(v)
}

func numAsFloat(v any) (f float64) {
	var ok bool
	if f, ok = v.(float64); !ok {
		i, _ := v.(int64)
		f = float64(i)
	}
	return
}

func toBool(v any) (b bool, ok bool) {
	ok = true
	switch x := v.(type) {
	case string:
		b = len(x) > 0
	case float64:
		b = x != 0.0
	case int64:
		b = x != 0
	case bool:
		b = x
	default:
		ok = false
	}
	return
}