# Changelog

### 0.4.6 (2020-10-14)

- Fix type of `ModifierInvocation.arguments`.

### 0.4.5 (2020-10-14)

- Disable `additionalProperties` in `Conditional` node.
- Fix `Return` node for empty return statements.

### 0.4.4 (2020-09-02)

- Fixed `body` property of `ForStatement`: was `Block`, can also be `Statement`.
- Added support for Solidity 0.7.1.
  - Made nullable properties optional. For TypeScript this means that `null` values can now be `undefined`.
  - Added support for free functions: `FunctionDefinition` is now a potential child in `SourceUnit.nodes`.

### 0.4.3 (2020-07-02)

- Fixed `body` property of `WhileStatement`: was `Block`, can also be `Statement`.

### 0.4.2 (2020-07-02)

- Fixed `length` property of `ArrayTypeName`: was `null`, can be any `Expression`.

### 0.4.1 (2020-06-18)

- Added all EVM versions to `InlineAssembly` node.
- Fixed `findAll` to check for null property values.

### 0.4.0 (2020-06-12)

- Added `solidity-ast/utils` with the following utility functions:
  - `isNodeType(nodeType, node)`: a type predicate for type-safe filtering or
    any kind of narrowing.
  - `findAll(nodeType, node)`: a generator function that recursively enumerates
    all of a node's descendents of type `nodeType`.
  - Both of these functions can be partially applied by supplying only the
    `nodeType` argument. This is useful for higher order functions like
    `filter` or `map`, as in `nodes.filter(isNodeType('ContractDefinition'))`.
- Removed `solidity-ast/predicates`. Use `isNodeType` from `solidity-ast/utils` instead.

### 0.3.2 (2020-06-12)

- Fix type for `ImportDirective.symbolAliases`.

### 0.3.1 (2020-06-09)

- Added missing type for `ImportDirective.symbolAliases`.

### 0.3.0 (2020-06-04)

- Added `solidity-ast/predicates` with type guards for type-safe filtering.

```typescript
import { isContractDefinition } from 'solidity-ast/predicates';
const contractDefs = sourceUnit.nodes.filter(isContractDefinition);
// : ContractDefinition[]
```

- Removed `ParameterTypes`, which was a duplicate of `ParameterList`. The latter should be used instead.
- Removed `ParameterTypeName`, which wasn't referenced anywhere.

### 0.2.1 (2020-06-01)

- Add missing `>>` operator.

### 0.2.0 (2020-05-18)

- Complete schema to successfully validate OpenZeppelin Contracts.

### 0.1.0 (2020-05-15)

- Initial release with incomplete schema.