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TS: Guard getTypeAtLocation with try/catch

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Asger F
2020-01-02 16:31:23 +00:00
parent 0388e9ca0c
commit 202746e92d
2 changed files with 24 additions and 1 deletions
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13
javascript/extractor/lib/typescript/src/ast_extractor.ts
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@@ -67,6 +67,17 @@ function forEachNode(ast: ts.Node, callback: (node: ts.Node) => void) {
visit(ast);
}
function tryGetTypeOfNode(typeChecker: ts.TypeChecker, node: AugmentedNode): ts.Type | null {
try {
return typeChecker.getTypeAtLocation(node);
} catch (e) {
let sourceFile = node.getSourceFile();
let { line, character } = sourceFile.getLineAndCharacterOfPosition(node.pos);
console.warn(`Could not compute type of ${ts.SyntaxKind[node.kind]} at ${sourceFile.fileName}:${line+1}:${character+1}`);
return null;
}
}
export function augmentAst(ast: AugmentedSourceFile, code: string, project: Project | null) {
ast.$lineStarts = ast.getLineStarts();
@@ -196,7 +207,7 @@ export function augmentAst(ast: AugmentedSourceFile, code: string, project: Proj
let contextualType = isContextuallyTypedNode(node)
? typeChecker.getContextualType(node)
: null;
let type = contextualType || typeChecker.getTypeAtLocation(node);
let type = contextualType || tryGetTypeOfNode(typeChecker, node);
if (type != null) {
let parent = node.parent;
let unfoldAlias = ts.isTypeAliasDeclaration(parent) && node === parent.type;