added Error.Message method

error.go

@@ -66,6 +66,10 @@ func (e *Error) Error() string {
 	return b.String()
 }
 
+func (e *Error) Message() string {
+	return e.msg
+}
+
 // Is implements the error equality function used by errors.Is()
 // It returns true if the error is the same instance or is created using the same ErrTmpl
 func (e *Error) Is(target error) bool {

go.mod

@@ -1,3 +1,3 @@
 module git.milar.in/milarin/adverr
 
-go 1.15
+go 1.18

must.go

@@ -0,0 +1,37 @@
+package adverr
+
+// Must panics if err is not nil.
+// It returns value otherwise
+func Must[T any](value T, err error) T {
+	if err != nil {
+		panic(err)
+	}
+	return value
+}
+
+// Must2 panics if err is not nil.
+// It returns a and b otherwise
+func Must2[A, B any](a A, b B, err error) (A, B) {
+	if err != nil {
+		panic(err)
+	}
+	return a, b
+}
+
+// Must3 panics if err is not nil.
+// It returns a, b and c otherwise
+func Must3[A, B, C any](a A, b B, c C, err error) (A, B, C) {
+	if err != nil {
+		panic(err)
+	}
+	return a, b, c
+}
+
+// Must4 panics if err is not nil.
+// It returns a, b and c otherwise
+func Must4[A, B, C, D any](a A, b B, c C, d D, err error) (A, B, C, D) {
+	if err != nil {
+		panic(err)
+	}
+	return a, b, c, d
+}

mustify.go

@@ -0,0 +1,101 @@
+package adverr
+
+// Mustify wraps the given function in a Must call
+func Mustify[T any](f func() (value T, err error)) func() T {
+	return func() T { return Must(f()) }
+}
+
+// Mustify2 wraps the given function in a Must2 call
+func Mustify2[A, B any](f func() (a A, b B, err error)) func() (A, B) {
+	return func() (A, B) { return Must2(f()) }
+}
+
+// Mustify3 wraps the given function in a Must3 call
+func Mustify3[A, B, C any](f func() (a A, b B, c C, err error)) func() (A, B, C) {
+	return func() (A, B, C) { return Must3(f()) }
+}
+
+// Mustify4 wraps the given function in a Must4 call
+func Mustify4[A, B, C, D any](f func() (a A, b B, c C, d D, err error)) func() (A, B, C, D) {
+	return func() (A, B, C, D) { return Must4(f()) }
+}
+
+// Mustify1i wraps the given function in a Must call
+func Mustify1i[I, O any](f func(I) (O, error)) func(I) O {
+	return func(a I) O { return Must(f(a)) }
+}
+
+// Mustify1i2 wraps the given function in a Must2 call
+func Mustify1i2[I, O1, O2 any](f func(I) (a O1, b O2, err error)) func(I) (O1, O2) {
+	return func(a I) (O1, O2) { return Must2(f(a)) }
+}
+
+// Mustify1i3 wraps the given function in a Must3 call
+func Mustify1i3[I, O1, O2, O3 any](f func(I) (a O1, b O2, c O3, err error)) func(I) (O1, O2, O3) {
+	return func(a I) (O1, O2, O3) { return Must3(f(a)) }
+}
+
+// Mustify1i4 wraps the given function in a Must4 call
+func Mustify1i4[I, O1, O2, O3, O4 any](f func(I) (a O1, b O2, c O3, d O4, err error)) func(I) (O1, O2, O3, O4) {
+	return func(a I) (O1, O2, O3, O4) { return Must4(f(a)) }
+}
+
+// Mustify2i wraps the given function in a Must call
+func Mustify2i[I1, I2, O any](f func(I1, I2) (O, error)) func(I1, I2) O {
+	return func(a I1, b I2) O { return Must(f(a, b)) }
+}
+
+// Mustify2i2 wraps the given function in a Must2 call
+func Mustify2i2[I1, I2, O1, O2 any](f func(I1, I2) (a O1, b O2, err error)) func(I1, I2) (O1, O2) {
+	return func(a I1, b I2) (O1, O2) { return Must2(f(a, b)) }
+}
+
+// Mustify2i3 wraps the given function in a Must3 call
+func Mustify2i3[I1, I2, O1, O2, O3 any](f func(I1, I2) (a O1, b O2, c O3, err error)) func(I1, I2) (O1, O2, O3) {
+	return func(a I1, b I2) (O1, O2, O3) { return Must3(f(a, b)) }
+}
+
+// Mustify2i4 wraps the given function in a Must4 call
+func Mustify2i4[I1, I2, O1, O2, O3, O4 any](f func(I1, I2) (a O1, b O2, c O3, d O4, err error)) func(I1, I2) (O1, O2, O3, O4) {
+	return func(a I1, b I2) (O1, O2, O3, O4) { return Must4(f(a, b)) }
+}
+
+// Mustify3i wraps the given function in a Must call
+func Mustify3i[I1, I2, I3, O any](f func(I1, I2, I3) (O, error)) func(I1, I2, I3) O {
+	return func(a I1, b I2, c I3) O { return Must(f(a, b, c)) }
+}
+
+// Mustify3i2 wraps the given function in a Must2 call
+func Mustify3i2[I1, I2, I3, O1, O2 any](f func(I1, I2, I3) (a O1, b O2, err error)) func(I1, I2, I3) (O1, O2) {
+	return func(a I1, b I2, c I3) (O1, O2) { return Must2(f(a, b, c)) }
+}
+
+// Mustify3i3 wraps the given function in a Must3 call
+func Mustify3i3[I1, I2, I3, O1, O2, O3 any](f func(I1, I2, I3) (a O1, b O2, c O3, err error)) func(I1, I2, I3) (O1, O2, O3) {
+	return func(a I1, b I2, c I3) (O1, O2, O3) { return Must3(f(a, b, c)) }
+}
+
+// Mustify3i4 wraps the given function in a Must4 call
+func Mustify3i4[I1, I2, I3, O1, O2, O3, O4 any](f func(I1, I2, I3) (a O1, b O2, c O3, d O4, err error)) func(I1, I2, I3) (O1, O2, O3, O4) {
+	return func(a I1, b I2, c I3) (O1, O2, O3, O4) { return Must4(f(a, b, c)) }
+}
+
+// Mustify4i wraps the given function in a Must call
+func Mustify4i[I1, I2, I3, I4, O any](f func(I1, I2, I3, I4) (O, error)) func(I1, I2, I3, I4) O {
+	return func(a I1, b I2, c I3, d I4) O { return Must(f(a, b, c, d)) }
+}
+
+// Mustify4i2 wraps the given function in a Must2 call
+func Mustify4i2[I1, I2, I3, I4, O1, O2 any](f func(I1, I2, I3, I4) (a O1, b O2, err error)) func(I1, I2, I3, I4) (O1, O2) {
+	return func(a I1, b I2, c I3, d I4) (O1, O2) { return Must2(f(a, b, c, d)) }
+}
+
+// Mustify4i3 wraps the given function in a Must3 call
+func Mustify4i3[I1, I2, I3, I4, O1, O2, O3 any](f func(I1, I2, I3, I4) (a O1, b O2, c O3, err error)) func(I1, I2, I3, I4) (O1, O2, O3) {
+	return func(a I1, b I2, c I3, d I4) (O1, O2, O3) { return Must3(f(a, b, c, d)) }
+}
+
+// Mustify4i4 wraps the given function in a Must4 call
+func Mustify4i4[I1, I2, I3, I4, O1, O2, O3, O4 any](f func(I1, I2, I3, I4) (a O1, b O2, c O3, d O4, err error)) func(I1, I2, I3, I4) (O1, O2, O3, O4) {
+	return func(a I1, b I2, c I3, d I4) (O1, O2, O3, O4) { return Must4(f(a, b, c, d)) }
+}