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<!doctype html>

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<title>CodeMirror: C-like mode</title>

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<a href="http://codemirror.net"><h1>CodeMirror</h1><img id=logo src="../../doc/logo.png"></a>

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<ul>

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<li><a href="../../doc/manual.html">Manual</a>

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</ul>

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<ul>

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<li><a href="../index.html">Language modes</a>

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</ul>

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</div>

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/* C demo code */

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#include <zmq.h>

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#include <pthread.h>

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#include <semaphore.h>

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#include <time.h>

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#include <stdio.h>

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#include <fcntl.h>

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#include <malloc.h>

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typedef struct {

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void* arg_socket;

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zmq_msg_t* arg_msg;

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char* arg_string;

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unsigned long arg_len;

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int arg_int, arg_command;

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int signal_fd;

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int pad;

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void* context;

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sem_t sem;

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} acl_zmq_context;

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#define p(X) (context->arg_##X)

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void* zmq_thread(void* context_pointer) {

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acl_zmq_context* context = (acl_zmq_context*)context_pointer;

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char ok = 'K', err = 'X';

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int res;

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while (1) {

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while ((res = sem_wait(&context->sem)) == EINTR);

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if (res) {write(context->signal_fd, &err, 1); goto cleanup;}

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switch(p(command)) {

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case 0: goto cleanup;

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case 1: p(socket) = zmq_socket(context->context, p(int)); break;

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case 2: p(int) = zmq_close(p(socket)); break;

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case 3: p(int) = zmq_bind(p(socket), p(string)); break;

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case 4: p(int) = zmq_connect(p(socket), p(string)); break;

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case 5: p(int) = zmq_getsockopt(p(socket), p(int), (void*)p(string), &p(len)); break;

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case 6: p(int) = zmq_setsockopt(p(socket), p(int), (void*)p(string), p(len)); break;

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case 7: p(int) = zmq_send(p(socket), p(msg), p(int)); break;

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case 8: p(int) = zmq_recv(p(socket), p(msg), p(int)); break;

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case 9: p(int) = zmq_poll(p(socket), p(int), p(len)); break;

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}

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p(command) = errno;

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write(context->signal_fd, &ok, 1);

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}

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cleanup:

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close(context->signal_fd);

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free(context_pointer);

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return 0;

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}

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void* zmq_thread_init(void* zmq_context, int signal_fd) {

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acl_zmq_context* context = malloc(sizeof(acl_zmq_context));

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pthread_t thread;

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context->context = zmq_context;

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context->signal_fd = signal_fd;

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sem_init(&context->sem, 1, 0);

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pthread_create(&thread, 0, &zmq_thread, context);

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pthread_detach(thread);

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return context;

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}

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</textarea></div>

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<h2>C++ example</h2>

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#include <iostream>

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#include "mystuff/util.h"

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namespace {

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enum Enum {

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VAL1, VAL2, VAL3

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};

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char32_t unicode_string = U"\U0010FFFF";

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string raw_string = R"delim(anything

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you

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want)delim";

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int Helper(const MyType& param) {

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return 0;

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}

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} // namespace

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class ForwardDec;

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template <class T, class V>

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class Class : public BaseClass {

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const MyType<T, V> member_;

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public:

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const MyType<T, V>& Method() const {

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return member_;

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}

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void Method2(MyType<T, V>* value);

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}

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template <class T, class V>

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void Class::Method2(MyType<T, V>* value) {

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std::out << 1 >> method();

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value->Method3(member_);

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member_ = value;

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}

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</textarea></div>

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<h2>Objective-C example</h2>

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This is a longer comment

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That spans two lines

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#import <Test/Test.h>

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@implementation YourAppDelegate

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// This is a one-line comment

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- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{

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char myString[] = "This is a C character array";

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int test = 5;

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return YES;

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}

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</textarea></div>

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<h2>Java example</h2>

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import com.demo.util.MyType;

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import com.demo.util.MyInterface;

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public enum Enum {

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VAL1, VAL2, VAL3

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}

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public class Class<T, V> implements MyInterface {

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public static final MyType<T, V> member;

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private class InnerClass {

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public int zero() {

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return 0;

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}

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}

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@Override

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public MyType method() {

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return member;

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}

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public void method2(MyType<T, V> value) {

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method();

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value.method3();

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member = value;

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}

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}

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</textarea></div>

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<h2>Scala example</h2>

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object FilterTest extends App {

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def filter(xs: List[Int], threshold: Int) = {

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def process(ys: List[Int]): List[Int] =

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if (ys.isEmpty) ys

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else if (ys.head < threshold) ys.head :: process(ys.tail)

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else process(ys.tail)

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process(xs)

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}

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println(filter(List(1, 9, 2, 8, 3, 7, 4), 5))

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}

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</textarea></div>

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<h2>Kotlin mode</h2>

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package org.wasabi.http

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import java.util.concurrent.Executors

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import java.net.InetSocketAddress

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import org.wasabi.app.AppConfiguration

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import io.netty.bootstrap.ServerBootstrap

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import io.netty.channel.nio.NioEventLoopGroup

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import io.netty.channel.socket.nio.NioServerSocketChannel

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import org.wasabi.app.AppServer

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public class HttpServer(private val appServer: AppServer) {

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val bootstrap: ServerBootstrap

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val primaryGroup: NioEventLoopGroup

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val workerGroup: NioEventLoopGroup

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init {

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// Define worker groups

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primaryGroup = NioEventLoopGroup()

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workerGroup = NioEventLoopGroup()

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// Initialize bootstrap of server

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bootstrap = ServerBootstrap()

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bootstrap.group(primaryGroup, workerGroup)

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bootstrap.channel(javaClass<NioServerSocketChannel>())

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bootstrap.childHandler(NettyPipelineInitializer(appServer))

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}

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public fun start(wait: Boolean = true) {

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val channel = bootstrap.bind(appServer.configuration.port)?.sync()?.channel()

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if (wait) {

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channel?.closeFuture()?.sync()

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}

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}

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public fun stop() {

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// Shutdown all event loops

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primaryGroup.shutdownGracefully()

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workerGroup.shutdownGracefully()

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// Wait till all threads are terminated

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primaryGroup.terminationFuture().sync()

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workerGroup.terminationFuture().sync()

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}

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}

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</textarea></div>

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<h2>Ceylon mode</h2>

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"Produces the [[stream|Iterable]] that results from repeated

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application of the given [[function|next]] to the given

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[[first]] element of the stream, until the function first

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returns [[finished]]. If the given function never returns

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`finished`, the resulting stream is infinite.

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For example:

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loop(0)(2.plus).takeWhile(10.largerThan)

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produces the stream `{ 0, 2, 4, 6, 8 }`."

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tagged("Streams")

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shared {Element+} loop<Element>(

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"The first element of the resulting stream."

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Element first)(

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"The function that produces the next element of the

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stream, given the current element. The function may

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return [[finished]] to indicate the end of the

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stream."

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Element|Finished next(Element element))

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=> let (start = first)

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object satisfies {Element+} {

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first => start;

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empty => false;

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function nextElement(Element element)

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=> next(element);

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iterator()

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=> object satisfies Iterator<Element> {

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variable Element|Finished current = start;

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shared actual Element|Finished next() {

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if (!is Finished result = current) {

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current = nextElement(result);

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return result;

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}

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else {

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return finished;

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}

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}

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};

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};

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</textarea></div>

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var cEditor = CodeMirror.fromTextArea(document.getElementById("c-code"), {

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lineNumbers: true,

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matchBrackets: true,

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mode: "text/x-csrc"

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});

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var cppEditor = CodeMirror.fromTextArea(document.getElementById("cpp-code"), {

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lineNumbers: true,

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matchBrackets: true,

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mode: "text/x-c++src"

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});

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var javaEditor = CodeMirror.fromTextArea(document.getElementById("java-code"), {

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lineNumbers: true,

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matchBrackets: true,

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mode: "text/x-java"

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});

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var objectivecEditor = CodeMirror.fromTextArea(document.getElementById("objectivec-code"), {

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lineNumbers: true,

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matchBrackets: true,

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mode: "text/x-objectivec"

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});

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var scalaEditor = CodeMirror.fromTextArea(document.getElementById("scala-code"), {

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lineNumbers: true,

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matchBrackets: true,

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mode: "text/x-scala"

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});

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var kotlinEditor = CodeMirror.fromTextArea(document.getElementById("kotlin-code"), {

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lineNumbers: true,

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matchBrackets: true,

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mode: "text/x-kotlin"

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});

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var ceylonEditor = CodeMirror.fromTextArea(document.getElementById("ceylon-code"), {

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lineNumbers: true,

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matchBrackets: true,

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mode: "text/x-ceylon"

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});

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var mac = CodeMirror.keyMap.default == CodeMirror.keyMap.macDefault;

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CodeMirror.keyMap.default[(mac ? "Cmd" : "Ctrl") + "-Space"] = "autocomplete";

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</script>

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<p>Simple mode that tries to handle C-like languages as well as it

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can. Takes two configuration parameters: <code>keywords</code>, an

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object whose property names are the keywords in the language,

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and <code>useCPP</code>, which determines whether C preprocessor

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directives are recognized.</p>

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<p><strong>MIME types defined:</strong> <code>text/x-csrc</code>

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(C), <code>text/x-c++src</code> (C++), <code>text/x-java</code>

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(Java), <code>text/x-csharp</code> (C#),

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<code>text/x-objectivec</code> (Objective-C),

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<code>text/x-scala</code> (Scala), <code>text/x-vertex</code>

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<code>x-shader/x-fragment</code> (shader programs),

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<code>text/x-squirrel</code> (Squirrel) and

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<code>text/x-ceylon</code> (Ceylon)</p>

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</article>

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