Files
coffeescript/lib/coffee-script/browser.js
Geoffrey Booth fb2be8e1e3 [CS2] Output ES2015 arrow functions, default parameters, rest parameters (#4311)
* Eliminate wrapper around “bound” (arrow) functions; output `=>` for such functions

* Remove irrelevant (and breaking) tests

* Minor cleanup

* When a function parameter is a splat (i.e., it uses the ES2015 rest parameter syntax) output that parameter as ES2015

* Rearrange function parameters when one of the parameters is a splat and isn’t the last parameter (very WIP)

* Handle params like `@param`, adding assignment expressions for them when they appear; ensure splat parameter is last

* Add parameter names (not a text like `'\nValue IdentifierLiteral: a'`) to the scope, so that parameters can’t be deleted; move body-related lines together; more explanation of what’s going on

* For parameters with a default value, correctly add the parameter name to the function scope

* Handle expansions in function parameters: when an expansion is found, set the parameters to only be the original parameters left of the expansion, then an `...args` parameter; and in the function body define variables for the parameters to the right of the expansion, including setting default values

* Handle splat parameters the same way we handle expansions: if a splat parameter is found, it becomes the last parameter in the function definition, and all following parameters get declared in the function body. Fix the splat/rest parameter values after the post-splat parameters have been extracted from it. Clean up `Code.compileNode` so that we loop through the parameters only once, and we create all expressions using calls like `new IdentifierLiteral` rather than `@makeCode`.

* Fix parameter name when a parameter is a splat attached to `this` (e.g. `@param...`)

* Rather than assigning post-splat parameters based on index, use slice; passes test “Functions with splats being called with too few arguments”

* Dial back our w00t indentation

* Better parsing of parameter names (WIP)

* Refactor processing of splat/expansion parameters

* Fix assignment of default parameters for parameters that come after a splat

* Better check for whether a param is attached to `this`

* More understandable variable names

* For parameters after a splat or expansion, assign them similar to the 1.x destructuring method of using `arguments`, except only concern ourselves with the post-splat parameters instead of all parameters; and use the splat/expansion parameter name, since `arguments` in ES fat arrow functions refers to the parent function’s `arguments` rather than the fat arrow function’s arguments/parameters

* Don’t add unnamed parameters (like `[]` as a parameter) to the function scope

* Disallow multiple splat/expansion parameters in function definitions; disallow lone expansion parameters

* Fix `this` params not getting assigned if the parameter is after a splat parameter

* Allow names of function parameters attached to `this` to be reserved words

* Always add a statement to the function body defining a variable with its default value, if it has one, if the variable `== null`; this covers the case when ES doesn’t apply the default value when `null` is passed in as a value, but CoffeeScript expects `null` and `undefined` to act interchangeably

* Aftermath of having both `undefined` and `null` trigger the use of default values for parameters with default values

* More careful parsing of destructured parameters

* Fall back to processing destructured parameters in the function body, to account for `this` or default values within destructured objects

* Clean up comments

* Restore new bare function test, minus the arrow function part of it

* Test that bound/arrow functions aren’t overwriting the `arguments` object, which should refer to the parent scope’s `arguments` (like `this`)

* Follow ES2015 spec for parameter default values: `null` gets assigned as as `null`, not the default value

* Mimic ES default parameters behavior for parameters after a splat or expansion parameter

* Bound functions cannot be generators: remove no-longer-relevant test, add check to throw error if `yield` appears inside a bound (arrow) function

* Error for bound generator functions should underline the `yield`
2016-10-25 22:26:13 -07:00

118 lines
3.4 KiB
JavaScript

// Generated by CoffeeScript 2.0.0-alpha
(function() {
var CoffeeScript, compile, runScripts,
indexOf = [].indexOf || function(item) { for (var i = 0, l = this.length; i < l; i++) { if (i in this && this[i] === item) return i; } return -1; };
CoffeeScript = require('./coffee-script');
CoffeeScript.require = require;
compile = CoffeeScript.compile;
CoffeeScript["eval"] = function(code, options = {}) {
if (options.bare == null) {
options.bare = true;
}
return eval(compile(code, options));
};
CoffeeScript.run = function(code, options = {}) {
options.bare = true;
options.shiftLine = true;
return Function(compile(code, options))();
};
if (typeof window === "undefined" || window === null) {
return;
}
if ((typeof btoa !== "undefined" && btoa !== null) && (typeof JSON !== "undefined" && JSON !== null)) {
compile = function(code, options = {}) {
options.inlineMap = true;
return CoffeeScript.compile(code, options);
};
}
CoffeeScript.load = function(url, callback, options = {}, hold = false) {
var xhr;
options.sourceFiles = [url];
xhr = window.ActiveXObject ? new window.ActiveXObject('Microsoft.XMLHTTP') : new window.XMLHttpRequest();
xhr.open('GET', url, true);
if ('overrideMimeType' in xhr) {
xhr.overrideMimeType('text/plain');
}
xhr.onreadystatechange = function() {
var param, ref;
if (xhr.readyState === 4) {
if ((ref = xhr.status) === 0 || ref === 200) {
param = [xhr.responseText, options];
if (!hold) {
CoffeeScript.run.apply(CoffeeScript, param);
}
} else {
throw new Error("Could not load " + url);
}
if (callback) {
return callback(param);
}
}
};
return xhr.send(null);
};
runScripts = function() {
var coffees, coffeetypes, execute, fn, i, index, j, len, s, script, scripts;
scripts = window.document.getElementsByTagName('script');
coffeetypes = ['text/coffeescript', 'text/literate-coffeescript'];
coffees = (function() {
var j, len, ref, results;
results = [];
for (j = 0, len = scripts.length; j < len; j++) {
s = scripts[j];
if (ref = s.type, indexOf.call(coffeetypes, ref) >= 0) {
results.push(s);
}
}
return results;
})();
index = 0;
execute = function() {
var param;
param = coffees[index];
if (param instanceof Array) {
CoffeeScript.run.apply(CoffeeScript, param);
index++;
return execute();
}
};
fn = function(script, i) {
var options, source;
options = {
literate: script.type === coffeetypes[1]
};
source = script.src || script.getAttribute('data-src');
if (source) {
return CoffeeScript.load(source, function(param) {
coffees[i] = param;
return execute();
}, options, true);
} else {
options.sourceFiles = ['embedded'];
return coffees[i] = [script.innerHTML, options];
}
};
for (i = j = 0, len = coffees.length; j < len; i = ++j) {
script = coffees[i];
fn(script, i);
}
return execute();
};
if (window.addEventListener) {
window.addEventListener('DOMContentLoaded', runScripts, false);
} else {
window.attachEvent('onload', runScripts);
}
}).call(this);