How to use the doctrine/lib/typed.js.parseParamType function in doctrine
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Polymer / tools / packages / gen-typescript-declarations / src / closure-types.ts View on Github 
name: string,
closureType: string|null|undefined,
templateTypes: string[] = [],
): ts.ParamType {
if (!closureType) {
return new ts.ParamType({
name,
type: ts.anyType,
optional: false,
rest: false,
});
}
let ast;
try {
ast = parseParamType(closureType);
} catch {
return new ts.ParamType({
name,
type: ts.anyType,
// It's important we try to get optional right even if we can't parse
// the annotation, because non-optional arguments can't follow optional
// ones.
optional: closureType.endsWith('='),
rest: false,
});
}
return convertParam(name, ast, templateTypes);
}
