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acorn5-object-spread

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Comparing version 4.0.0 to 5.0.0

90

inject.js
'use strict';
module.exports = function(acorn) {
if (acorn.version.substr(0, 1) !== "5") {
throw new Error("Unsupported acorn version " + acorn.version + ", please use acorn 5");
let acornVersion = acorn.version.match(/^5\.(\d+)\./)
if (!acornVersion || Number(acornVersion[1]) < 2) {
throw new Error("Unsupported acorn version " + acorn.version + ", please use acorn 5 >= 5.2");
}
var tt = acorn.tokTypes;
var pp = acorn.Parser.prototype;
// this is the same parseObj that acorn has with...
function parseObj(isPattern, refDestructuringErrors) {
let node = this.startNode(), first = true, propHash = {}
node.properties = []
this.next()
while (!this.eat(tt.braceR)) {
if (!first) {
this.expect(tt.comma)
if (this.afterTrailingComma(tt.braceR)) break
} else first = false
let prop = this.startNode(), isGenerator, isAsync, startPos, startLoc
if (this.options.ecmaVersion >= 6) {
// ...the spread logic borrowed from babylon :)
if (this.type === tt.ellipsis) {
if (isPattern) {
this.next()
prop.argument = this.parseIdent()
this.finishNode(prop, "RestElement")
} else {
prop = this.parseSpread(refDestructuringErrors)
}
node.properties.push(prop)
if (this.type === tt.comma) {
if (isPattern) {
this.raise(this.start, "Comma is not permitted after the rest element")
} else if (refDestructuringErrors && refDestructuringErrors.trailingComma < 0) {
refDestructuringErrors.trailingComma = this.start
}
}
continue
}
prop.method = false
prop.shorthand = false
if (isPattern || refDestructuringErrors) {
startPos = this.start
startLoc = this.startLoc
}
if (!isPattern)
isGenerator = this.eat(tt.star)
}
this.parsePropertyName(prop)
if (!isPattern && this.options.ecmaVersion >= 8 && !isGenerator && this.isAsyncProp(prop)) {
isAsync = true
this.parsePropertyName(prop, refDestructuringErrors)
} else {
isAsync = false
}
this.parsePropertyValue(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors)
if (!isPattern) this.checkPropClash(prop, propHash)
node.properties.push(this.finishNode(prop, "Property"))
}
return this.finishNode(node, isPattern ? "ObjectPattern" : "ObjectExpression")
}
const getCheckLVal = origCheckLVal => function (expr, bindingType, checkClashes) {

@@ -79,3 +23,29 @@ if (expr.type == "ObjectPattern") {

acorn.plugins.objectSpread = function objectSpreadPlugin(instance) {
pp.parseObj = parseObj;
instance.extend("parseProperty", nextMethod => function (isPattern, refDestructuringErrors) {
if (this.options.ecmaVersion >= 6 && this.type === tt.ellipsis) {
let prop
if (isPattern) {
prop = this.startNode()
this.next()
prop.argument = this.parseIdent()
this.finishNode(prop, "RestElement")
} else {
prop = this.parseSpread(refDestructuringErrors)
}
if (this.type === tt.comma) {
if (isPattern) {
this.raise(this.start, "Comma is not permitted after the rest element")
} else if (refDestructuringErrors && refDestructuringErrors.trailingComma < 0) {
refDestructuringErrors.trailingComma = this.start
}
}
return prop
}
return nextMethod.apply(this, arguments)
})
instance.extend("checkPropClash", nextMethod => function(prop, propHash) {
if (prop.type == "SpreadElement" || prop.type == "RestElement") return
return nextMethod.apply(this, arguments)
})
instance.extend("checkLVal", getCheckLVal)

@@ -82,0 +52,0 @@ instance.extend("toAssignable", nextMethod => function(node, isBinding) {

@@ -18,5 +18,5 @@ {

"dependencies": {
"acorn": "^5.1.2"
"acorn": "^5.2.1"
},
"version": "4.0.0"
"version": "5.0.0"
}
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