Find kind of TypeReference using TypeScript API

Question

I'm trying to find the kind (class, interface, type alias, enumeration ...) of a TypeReference.

I have this:

const anode = node as ts.TypeReferenceNode;
const symbol = this.typechecker.getSymbolAtLocation(anode.typeName) as ts.Symbol;
const type = this.typechecker.getTypeOfSymbolAtLocation(symbol, anode);
const decls = symbol.getDeclarations() as ts.Declaration[];

But the call to getSymbolAtLocation returns undefined.

anode is a TypeReferenceNode (kind 159) according to VSC debugger:

And escapedText ETypes references to an enum reference.

lilezek · Accepted Answer · 2017-08-14 11:12:24Z

7

I found out a solution:

const anode = node as ts.TypeReferenceNode;
const type = this.typechecker.getTypeAtLocation(anode);
const symbol = type.symbol || type.aliasSymbol;
const decls = symbol.getDeclarations() as ts.Declaration[];

From the decls array you can find out whether the declarations are Interfaces, Classes, etc...

answered Aug 14, 2017 at 11:12

lilezek

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