generate: require ".*" to generate all functions (#66)

As the number of available functions increase, the usefulness or generating all of them lessens. This is a breaking change but a necessary one. You will now need to specify `foo.*` to generate all functions for `foo`.

README.md

@@ -8,14 +8,14 @@ focuses on type safety, performance and immutability.
 
 - [Quick Start](#quick-start)
   * [Built-in Types](#built-in-types)
-  * [Custom Types And Structs](#custom-types-and-structs)
+  * [Custom Types](#custom-types)
   * [Limiting Functions Generated](#limiting-functions-generated)
 - [Functions](#functions)
 - [FAQ](#faq)
-  * [What are the requirements?](#what-are-the-requirements)
-  * [What are the goals of `pie`?](#what-are-the-goals-of-pie)
-  * [Can I contribute?](#how-do-i-contribute-a-function)
-  * [Why is the emoji a slice of pizza instead of a pie?](#why-is-the-emoji-a-slice-of-pizza-instead-of-a-pie)
+  * [What are the requirements?](#what-are-the-requirements-)
+  * [What are the goals of `pie`?](#what-are-the-goals-of--pie--)
+  * [How do I contribute a function?](#how-do-i-contribute-a-function-)
+  * [Why is the emoji a slice of pizza instead of a pie?](#why-is-the-emoji-a-slice-of-pizza-instead-of-a-pie-)
 
 # Quick Start
 
@@ -57,7 +57,7 @@ func main() {
 }
 ```
 
-## Custom Types And Structs
+## Custom Types
 
 Annotate the slice type in your source code:
 
@@ -66,7 +66,7 @@ type Car struct {
     Name, Color string
 }
 
-//go:generate pie Cars
+//go:generate pie Cars.*
 type Cars []Car
 ```
 
@@ -109,7 +109,7 @@ cars.Unselect(func (car Car) {
 
 ## Limiting Functions Generated
 
-By default all functions will be generated. This is easy to get going but
+The `.*` can be used to generate all functions. This is easy to get going but
 creates a lot of unused code. You can limit the functions generated by chaining
 the function names with a dot syntax, like:
 
@@ -129,7 +129,7 @@ This will only generate `myInts.Average`, `myInts.Sum` and `myStrings.Select`.
 | `AreSorted`  | ✓      | ✓      |       |      | n        | Check if the slice is already sorted. |
 | `AreUnique`  | ✓      | ✓      |       |      | n        | Check if the slice contains only unique elements. |
 | `Average`    |        | ✓      |       |      | n        | The average (mean) value, or a zeroed value. |
-| `Bottom`    |    ✓     | ✓      |    ✓    |      | n        | Gets n elements from bottom. |
+| `Bottom`     | ✓      | ✓      | ✓     |      | n        | Gets n elements from bottom. |
 | `Contains`   | ✓      | ✓      | ✓     |      | n        | Check if the value exists in the slice. |
 | `Extend`     | ✓      | ✓      | ✓     |      | n        | A new slice with the elements from each slice appended to the end. |
 | `First`      | ✓      | ✓      | ✓     |      | 1        | The first element, or a zeroed value. |
@@ -146,8 +146,8 @@ This will only generate `myInts.Average`, `myInts.Sum` and `myStrings.Select`.
 | `Select`     | ✓      | ✓      | ✓     |      | n        | A new slice containing only the elements that returned true from the condition. |
 | `Sort`       | ✓      | ✓      |       |      | n⋅log(n) | Return a new sorted slice. |
 | `Sum`        |        | ✓      |       |      | n        | Sum (total) of all elements. |
-| `Shuffle`       | ✓       | ✓      |✓       |      | n        | Returns a new shuffled slice. |
-| `Top`  | ✓      | ✓      | ✓     |      | n        | Gets several elements from top(head of slice).|
+| `Shuffle`    | ✓      | ✓      | ✓     |      | n        | Returns a new shuffled slice. |
+| `Top`        | ✓      | ✓      | ✓     |      | n        | Gets several elements from top(head of slice).|
 | `ToStrings`  | ✓      | ✓      | ✓     |      | n        | Transforms each element to a string. |
 | `Transform`  | ✓      | ✓      | ✓     |      | n        | A new slice where each element has been transformed. |
 | `Unique`     | ✓      | ✓      |       |      | n⋅log(n) | Return a new slice with only unique elements. |

main.go

@@ -141,7 +141,7 @@ func main() {
 
 		var templates []string
 		for _, function := range functions.Functions {
-			if len(fns) > 0 && !pie.Strings(fns).Contains(function.Name) {
+			if fns[0] != "*" && !pie.Strings(fns).Contains(function.Name) {
 				continue
 			}
 
@@ -210,5 +210,9 @@ func main() {
 func getFunctionsFromArg(arg string) (mapOrSliceType string, fns []string) {
 	parts := strings.Split(arg, ".")
 
+	if len(parts) < 2 {
+		panic("must specify at least one function or *: " + arg)
+	}
+
 	return parts[0], parts[1:]
 }

pie/car.go

@@ -1,6 +1,6 @@
 package pie
 
-//go:generate pie cars carPointers
+//go:generate pie cars.* carPointers.*
 type cars []car
 type carPointers []*car
 

pie/currencies.go

@@ -4,7 +4,7 @@ type currency struct {
 	NumericCode, Exponent int
 }
 
-//go:generate pie currencies
+//go:generate pie currencies.*
 type currencies map[string]currency
 
 var isoCurrencies = currencies{

pie/float64s.go

@@ -1,4 +1,4 @@
 package pie
 
-//go:generate pie Float64s
+//go:generate pie Float64s.*
 type Float64s []float64

pie/ints.go

@@ -1,6 +1,6 @@
 package pie
 
-//go:generate pie Ints
+//go:generate pie Ints.*
 type Ints []int
 
 //go:generate pie myInts.Sum.Average

pie/strings.go

@@ -1,4 +1,4 @@
 package pie
 
-//go:generate pie Strings
+//go:generate pie Strings.*
 type Strings []string