Function compute

test/angular/1.7/angular.js:13955–13970

(values)

      if (!mustHaveExpression || expressions.length) {
        var compute = function(values) {
          for (var i = 0, ii = expressions.length; i < ii; i++) {
            if (allOrNothing && isUndefined(values[i])) return;
            concat[expressionPositions[i]] = values[i];
          }

          if (contextAllowsConcatenation) {
            // If `singleExpression` then `concat[0]` might be a "trusted" value or `null`, rather than a string
            return $sce.getTrusted(trustedContext, singleExpression ? concat[0] : concat.join(''));
          } else if (trustedContext && concat.length > 1) {
            // This context does not allow more than one part, e.g. expr + string or exp + exp.
            $interpolateMinErr.throwNoconcat(text);
          }
          // In an unprivileged context or only one part: just concatenate and return.
          return concat.join('');
        };

        return extend(function interpolationFn(context) {
            var i = 0;