Function parseSubParameter

docs/app/js/sanddance-app.js:148134–148148

* Parse a sub-parameter object.

(def, value15, scope)

/**
 * Parse a sub-parameter object.
 */ function parseSubParameter(def, value15, scope) {
    const n = def.params.length;
    let pdef; // loop over defs to find matching key
    for(let i = 0; i < n; ++i){
        pdef = def.params[i];
        for(const k in pdef.key)if (pdef.key[k] !== value15[k]) {
            pdef = null;
            break;
        }
        if (pdef) break;
    } // raise error if matching key not found
    if (!pdef) (0, _vegaUtil.error)("Unsupported parameter: " + (0, _vegaUtil.stringValue)(value15)); // parse params, create Params transform, return ref
    const params = (0, _vegaUtil.extend)(parseParameters(pdef, value15, scope), pdef.key);
    return ref(scope.add(Params(params)));
} // -- Utilities -----
const outerExpr = (_)=>_ && _.expr;
const outerField = (_)=>_ && _.field;
const isData = (_)=>_ === "data";