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shift-spec
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shift-spec - npm Package Compare versions
Comparing version 2015.0.0 to 2015.1.0
| { | ||
| "name": "shift-spec", | ||
| "version": "2015.0.0", | ||
| "description": "Shift AST specification", | ||
| "version": "2015.1.0", | ||
| "description": "JavaScript representation of the Shift AST specification", | ||
| "author": "Shape Security Labs", | ||
| "homepage": "https://github.com/shapesecurity/shift-spec", | ||
| "homepage": "https://github.com/shapesecurity/shift-spec-js", | ||
| "repository": { | ||
| "type": "git", | ||
| "url": "https://github.com/shapesecurity/shift-spec.git" | ||
| "url": "https://github.com/shapesecurity/shift-spec-js.git" | ||
| }, | ||
| "main": "dist/index.js", | ||
| "scripts": { | ||
| "test": "echo \"Error: no test specified\" && exit 1" | ||
| "build": "node src/generate-spec.js", | ||
| "test": "node ./" | ||
| }, | ||
| "files": [ | ||
| "spec.idl" | ||
| "dist" | ||
| ], | ||
@@ -23,8 +25,12 @@ "keywords": [ | ||
| "syntax", | ||
| "tree" | ||
| "tree", | ||
| "implementation" | ||
| ], | ||
| "devDependencies": { | ||
| "shift-spec-idl": "2015.0.0" | ||
| }, | ||
| "bugs": { | ||
| "url": "https://github.com/shapesecurity/shift-spec/issues" | ||
| "url": "https://github.com/shapesecurity/shift-spec-js/issues" | ||
| }, | ||
| "license": "Apache-2.0" | ||
| } |
@@ -1,3 +0,3 @@ | ||
| Shift AST Specification | ||
| ======================= | ||
| JavaScript Shift AST Specification Representation | ||
| ================================================= | ||
@@ -7,87 +7,10 @@ | ||
| This document defines an interface for an abstract syntax tree that can be used | ||
| to represent the structure of an ECMAScript program. The interface is intended | ||
| to be able to represent any structurally valid ECMAScript program (according to | ||
| the latest version of ECMA-262) while minimising the number of invalid programs | ||
| that may be represented. | ||
| TODO | ||
| This specification is defined using the [Web IDL](http://www.w3.org/TR/WebIDL/) | ||
| standard with the following extended attributes: | ||
| 0. `TypeIndicator`: This extended attribute may be applied to a readonly | ||
| attribute to indicate the following: | ||
| * The *type* following the *attribute* keyword must be an *identifier*. | ||
| * Declare an enum whose *identifier* is the *type* that follows the | ||
| *attribute* keyword, whose values are the *identifier*s of all | ||
| interfaces that inherit the attribute. | ||
| * The value of the attribute is the member of the above-declared enum | ||
| associated with the interface's *identifier*. | ||
| 0. `NonEmpty`: This extended attribute may be applied to any attribute with a | ||
| Sequence or Array type to disallow the zero-length inhabitant of that type. | ||
| ## Usage | ||
| TODO | ||
| ## Status | ||
| This specification currently supports ECMAScript as defined in ECMA-262 version | ||
| 6 (as of release candidate 2), which is the upcoming version of ECMA-262 at the | ||
| time of this writing. | ||
| ## Implementations | ||
| This section is reserved for a listing of implementations that conform to this | ||
| specification as well as tools that operate on those data types. To add your | ||
| own implementation to this list, please open a Pull Request. Implementations | ||
| should be ordered by submission date within a category that appropriately | ||
| describes their purpose. | ||
| ### Create | ||
| * [Shift Parser](https://github.com/shapesecurity/shift-parser-js) | ||
| * [Shift AST Constructors](https://github.com/shapesecurity/shift-ast-js) | ||
| * [Shift-SpiderMonkey Converter](https://github.com/shapesecurity/shift-spidermonkey-converter-js) | ||
| ### Transform | ||
| * [Shift Reducer](https://github.com/shapesecurity/shift-reducer-js) | ||
| * [Shift Code Generator](https://github.com/shapesecurity/shift-codegen-js) | ||
| ### Analyse | ||
| * [Shift Validator](https://github.com/shapesecurity/shift-validator-js) | ||
| * [Shift Scope Analyzer](https://github.com/shapesecurity/shift-scope-js) | ||
| ### Use | ||
| * [Shift Traverse](https://github.com/Constellation/shift-traverse-js) | ||
| ## Design Decisions | ||
| * The concepts of `Block` and `VariableDeclaration` are separate from | ||
| `BlockStatement` and `VariableDeclarationStatement` respectively in order to | ||
| avoid usage of those statements where other types of statements are not | ||
| allowed. | ||
| * The `FunctionBody` node represents a `Block` where directives are allowed. | ||
| Directives are not represented as `LiteralStringExpression`s to avoid | ||
| confusion with unnecessarily parenthesised string literals in statement | ||
| position. | ||
| * `AssignmentExpression` is separate from `BinaryExpression` to prepare for | ||
| ES6, which will only allow valid bindings in the left operand (12.14.1). All | ||
| other binary expressions are grouped together. | ||
| * RegExps and other exotic values are not used as primitives to allow for the | ||
| possibility of serialisation to JSON. | ||
| ### Compromises | ||
| * `VariableDeclarationKind` contains `let` and `const`, which should only be | ||
| allowed in ES6, but implementations had widespread support for these | ||
| declaration kinds long before they had support for any other ES6 feature. | ||
| Because of this, many people consider it an unofficial extension to ES5. | ||
| * Similarly, `FunctionDeclaration`s in arbitrary `Statement` position were | ||
| allowed by many ES5 implementations (with varying semantics), so the | ||
| `SourceElement` class was removed, and `FunctionDeclaration` was moved to | ||
| `Statement`. | ||
| ## License | ||
@@ -94,0 +17,0 @@ |
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Major refactor
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Found 1 instance in 1 package
Fixed alerts
Empty package
Supply chain riskPackage does not contain any code. It may be removed, is name squatting, or the result of a faulty package publish.
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Major refactor
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No tests
QualityPackage does not have any tests. This is a strong signal of a poorly maintained or low quality package.
Found 1 instance in 1 package
Improved metrics
- Total package byte prevSize
- increased by77.69%
49409
- Lines of code
- increased byInfinity%
749
- Number of low quality alerts
- decreased by-100%
0
- Number of medium supply chain risk alerts
- decreased by-50%
1
Worsened metrics
- Dev dependency count
- increased byInfinity%
1
- Number of lines in readme file
- decreased by-71.96%
30
No dependency changes