path: root/src/embind/embind.js

/*global Module*/
/*global _malloc, _free, _memcpy*/
/*global FUNCTION_TABLE, HEAP32, HEAPU8*/
/*global Pointer_stringify*/
/*global __emval_register, _emval_handle_array, __emval_decref*/
/*global ___getTypeName*/

var InternalError = Module.InternalError = extendError(Error, 'InternalError');
var BindingError = Module.BindingError = extendError(Error, 'BindingError');
var UnboundTypeError = Module.UnboundTypeError = extendError(BindingError, 'UnboundTypeError');

function throwInternalError(message) {
    throw new InternalError(message);
}

function throwBindingError(message) {
    throw new BindingError(message);
}

function throwUnboundTypeError(message, types) {
    var unboundTypes = [];
    var seen = {};
    function visit(type) {
        if (seen[type]) {
            return;
        }
        if (registeredTypes[type]) {
            return;
        }
        if (typeDependencies[type]) {
            typeDependencies[type].forEach(visit);
            return;
        }
        unboundTypes.push(type);
        seen[type] = true;
    }
    types.forEach(visit);
    
    throw new UnboundTypeError(message + ': ' + unboundTypes.map(getTypeName).join([', ']));
}

// Creates a function overload resolution table to the given method 'methodName' in the given prototype,
// if the overload table doesn't yet exist.
function ensureOverloadTable(proto, methodName, humanName) {
    if (undefined === proto[methodName].overloadTable) {
        var prevFunc = proto[methodName];
        // Inject an overload resolver function that routes to the appropriate overload based on the number of arguments.
        proto[methodName] = function() {
            // TODO This check can be removed in -O3 level "unsafe" optimizations.
            if (!proto[methodName].overloadTable.hasOwnProperty(arguments.length)) {
                throwBindingError("Function '" + humanName + "' called with an invalid number of arguments (" + arguments.