Coteline 介绍
Coteline 是一个全新的基于 JVM 的编程语言。Coteline 是
Ceylon 的超集，并保持对 Ceylon 的向后兼容。
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“public as a service”, because shared is not a good keyword.
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implements, because it is fancier than satisfies and it closes the gap for existing J2EE 1.3 developers.
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Call an object a singleton.
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Use const in lieu of value.
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Write def as a Hipster-compliant variant of function.
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Ink Unit instead of void in your fine-crafted Coteline deFinitions.
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contract and trait carry more meaning than interface (and who cares about the actual formal semantics of these?).
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We think pray is a better replacement for assert, because this is what you actually do when you write assertions.
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dynamic blocks are better named as unsafe blocks, because they escape the wonderland of static type checks.
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Parametric types with in / out for contravariance and covariance are hard to manipulate. This is also way too reminiscent of the C# world. Coteline provides salvation with covar and contravar.
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Last but not least, you can also write foreach loops in Coteline.
示例代码：
"The classic Hello World program"
public Unit hello(String name = "World") {
const str = "Hello, `` name ``!";
def work() => print(str);
work();
pray(1 == 1);
plop.plop();
foreach (i in {1, 2, 3}) {
print(i);
}
}
singleton plop {
public Unit plop() {
print("Oh Plop!");
}
}
"Run the module `better.Ceylon.is.Coteline`."
public Unit run(){
if (nonempty args=process.arguments) {
foreach (arg in args) {
hello(arg);
}
}
else {
hello();
}
}
Coteline 官网
http://typeunsafe.github.io/coteline/
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