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baseNodeFactory.ts
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56 lines (49 loc) · 2.68 KB
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/* @internal */
namespace ts {
/**
* A `BaseNodeFactory` is an abstraction over an `ObjectAllocator` that handles caching `Node` constructors
* and allocating `Node` instances based on a set of predefined types.
*/
/* @internal */
export interface BaseNodeFactory {
createBaseSourceFileNode(kind: SyntaxKind): Node;
createBaseIdentifierNode(kind: SyntaxKind): Node;
createBasePrivateIdentifierNode(kind: SyntaxKind): Node;
createBaseTokenNode(kind: SyntaxKind): Node;
createBaseNode(kind: SyntaxKind): Node;
}
/**
* Creates a `BaseNodeFactory` which can be used to create `Node` instances from the constructors provided by the object allocator.
*/
export function createBaseNodeFactory(): BaseNodeFactory {
// tslint:disable variable-name
let NodeConstructor: new (kind: SyntaxKind, pos?: number, end?: number) => Node;
let TokenConstructor: new (kind: SyntaxKind, pos?: number, end?: number) => Node;
let IdentifierConstructor: new (kind: SyntaxKind, pos?: number, end?: number) => Node;
let PrivateIdentifierConstructor: new (kind: SyntaxKind, pos?: number, end?: number) => Node;
let SourceFileConstructor: new (kind: SyntaxKind, pos?: number, end?: number) => Node;
// tslint:enable variable-name
return {
createBaseSourceFileNode,
createBaseIdentifierNode,
createBasePrivateIdentifierNode,
createBaseTokenNode,
createBaseNode
};
function createBaseSourceFileNode(kind: SyntaxKind): Node {
return new (SourceFileConstructor || (SourceFileConstructor = objectAllocator.getSourceFileConstructor()))(kind, /*pos*/ -1, /*end*/ -1);
}
function createBaseIdentifierNode(kind: SyntaxKind): Node {
return new (IdentifierConstructor || (IdentifierConstructor = objectAllocator.getIdentifierConstructor()))(kind, /*pos*/ -1, /*end*/ -1);
}
function createBasePrivateIdentifierNode(kind: SyntaxKind): Node {
return new (PrivateIdentifierConstructor || (PrivateIdentifierConstructor = objectAllocator.getPrivateIdentifierConstructor()))(kind, /*pos*/ -1, /*end*/ -1);
}
function createBaseTokenNode(kind: SyntaxKind): Node {
return new (TokenConstructor || (TokenConstructor = objectAllocator.getTokenConstructor()))(kind, /*pos*/ -1, /*end*/ -1);
}
function createBaseNode(kind: SyntaxKind): Node {
return new (NodeConstructor || (NodeConstructor = objectAllocator.getNodeConstructor()))(kind, /*pos*/ -1, /*end*/ -1);
}
}
}