no valid error messages from Validate() when constraints are build with caret or tilde

Running the code below, gives the following error message:
"1.6.6 does not have same major version as 1.12.7. "

This error message does not make sense here, as I have the same Major for both.

I would expect instead an error message like the following:
"1.6.6. is not in the range >= 1.12.7, < 2.0.0"
OR
"1.6.6. is not >= 1.12.7"

package main

import (
"fmt"

"github.com/Masterminds/semver"

)

func main() {
versionConstraint, err := semver.NewConstraint("^1.12.7")
if err != nil {
return
}

currVersion, err := semver.NewVersion("1.6.6")
if err != nil {
	return
}

a, msgs := versionConstraint.Validate(currVersion)
if !a {

	for _, m := range msgs {
		fmt.Println(m)
	}
}

}

In the constraints.go is defined the following map, which pairs one error message per special character found in the constraint. This fails for cases (such as ~ and ^) in which the special character defines a range with lower and upper limits.

constraintMsg = map[string]string{
"": "%s is not equal to %s",
"=": "%s is not equal to %s",
"!=": "%s is equal to %s",
">": "%s is less than or equal to %s",
"<": "%s is greater than or equal to %s",
">=": "%s is less than %s",
"=>": "%s is less than %s",
"<=": "%s is greater than %s",
"=<": "%s is greater than %s",
"~": "%s does not have same major and minor version as %s",
"~>": "%s does not have same major and minor version as %s",
"^": "%s does not have same major version as %s",
}

It would be more meaningful if the constraints functions (e.g.func constraintCaret(v *Version, c *constraint) bool {) return the specific error message together with the false value.

[mattfarina]

It would be more meaningful if the constraints functions (e.g.func constraintCaret(v *Version, c *constraint) bool {) return the specific error message together with the false value.

This is a wonderful idea on how to fix this. Thanks.