Method isolateCoverGrammar

src/parser.ts:548–567

(parseFunction)

    // pattern. The CoverInitializedName check is deferred.

    isolateCoverGrammar(parseFunction) {
        const previousIsBindingElement = this.context.isBindingElement;
        const previousIsAssignmentTarget = this.context.isAssignmentTarget;
        const previousFirstCoverInitializedNameError = this.context.firstCoverInitializedNameError;

        this.context.isBindingElement = true;
        this.context.isAssignmentTarget = true;
        this.context.firstCoverInitializedNameError = null;

        const result = parseFunction.call(this);
        if (this.context.firstCoverInitializedNameError !== null) {
            this.throwUnexpectedToken(this.context.firstCoverInitializedNameError);
        }

        this.context.isBindingElement = previousIsBindingElement;
        this.context.isAssignmentTarget = previousIsAssignmentTarget;
        this.context.firstCoverInitializedNameError = previousFirstCoverInitializedNameError;

        return result;
    }

    inheritCoverGrammar(parseFunction) {
        const previousIsBindingElement = this.context.isBindingElement;