Add isSourceFile() type guard#4210
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Signed-off-by: mrazauskas <tom@mrazauskas.de>
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Pull request overview
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Adds a new type guard to detect TypeScript SourceFile nodes in the AST helper utilities.
Changes:
- Import
SourceFiletype inast/is.ts - Add
isSourceFile(node: Node): node is SourceFilehelper
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This PR add
isSourceFile()type guard.The code is copied from: https://github.com/microsoft/TypeScript/blob/6fbce89821d93a5b761581d9ac540455f38e9acb/src/compiler/factory/nodeTests.ts#L1014-L1016
Close #4208