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Add "def" syntax sugar for named function definitions.

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This is technically redundant but it makes functional/procedural code
look a *lot* more natural.
This commit is contained in:
Bob Nystrom
2015-12-01 08:05:46 -08:00
parent c3e2f17758
commit 10f149f359
27 changed files with 178 additions and 64 deletions
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36
example/animals.wren
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@ -9,29 +9,27 @@ import "io" for Stdin
// animals. Internal nodes are yes/no questions that choose which branch to
// explore.
class Node {
// Reads a "yes" or "no" (or something approximating) those and returns true
// if yes was entered.
promptYesNo(prompt) {
while (true) {
var line = promptString(prompt)
// Reads a "yes" or "no" (or something approximating) those and returns true
// if yes was entered.
def promptYesNo(prompt) {
while (true) {
var line = promptString(prompt)
if (line.startsWith("y") || line.startsWith("Y")) return true
if (line.startsWith("n") || line.startsWith("N")) return false
if (line.startsWith("y") || line.startsWith("Y")) return true
if (line.startsWith("n") || line.startsWith("N")) return false
// Quit.
if (line.startsWith("q") || line.startsWith("Q")) Fiber.yield()
}
}
// Writes a prompt and reads a string of input.
promptString(prompt) {
System.write("%(prompt) ")
return Stdin.readLine()
// Quit.
if (line.startsWith("q") || line.startsWith("Q")) Fiber.yield()
}
}
class Animal is Node {
// Writes a prompt and reads a string of input.
def promptString(prompt) {
System.write("%(prompt) ")
return Stdin.readLine()
}
class Animal {
construct new(name) {
_name = name
}
@ -56,7 +54,7 @@ class Animal is Node {
}
}
class Question is Node {
class Question {
construct new(question, ifYes, ifNo) {
_question = question
_ifYes = ifYes