Weitere Informationen hierzu finden Sie im [Handbuch für fortgeschrittene Benutzer](../advanced/index.md){.internal-link target=_blank}.

## Einzelheiten

	{
		"3 #define foo bar\n",
		"'#' must be first item on line",
	},
	{
		"#ifdef foo\nhello",
		"unclosed #ifdef or #ifndef",
	},
	{
		"#ifndef foo\nhello",
		"unclosed #ifdef or #ifndef",
	},
	{
		"#ifdef foo\nhello\n#else\nbye",
		"unclosed #ifdef or #ifndef",
	},
	{
		"#define A() A()\nA()",
		"recursive macro invocation",
	},
	{
		"#define A a\n#define A a\n",

    final InitScriptFinder target1 = Mock()
    final InitScriptFinder target2 = Mock()
    final CompositeInitScriptFinder finder = new CompositeInitScriptFinder(target1, target2)
    
    def "collects up scripts from all finders"() {
        def result = []

        when:
        finder.findScripts(result)

        then:
        1 * target1.findScripts(result)
        1 * target2.findScripts(result)
    }

            }
        """)
    }

    String alternateOutput = "$HELLO_WORLD\n"

    @Override
    SourceFile getLibraryHeader() {
        return sourceFile("headers", "hello.h", """
            #ifndef HELLO_H
            #define HELLO_H
            #ifdef _WIN32
            #define DLL_FUNC __declspec(dllexport)
            #else
            #define DLL_FUNC
            #endif

            class Greeter {

        List<LocallyAvailableResourceCandidates> allCandidates = new LinkedList<LocallyAvailableResourceCandidates>();
        for (LocallyAvailableResourceFinder<C> finder : composites) {
            allCandidates.add(finder.findCandidates(criterion));
        }

        return new CompositeLocallyAvailableResourceCandidates(allCandidates);
    }

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>

#ifndef EAI_NODATA
#define EAI_NODATA -5
#endif

// If nothing else defined EAI_OVERFLOW, make sure it has a value.
#ifndef EAI_OVERFLOW
#define EAI_OVERFLOW -12
#endif
*/
import "C"
import "unsafe"

const (
	_C_AF_INET      = C.AF_INET

#ifndef COMMON_HEADER_${sourceIdx}_H
#define COMMON_HEADER_${sourceIdx}_H

// TODO: Actually do something in this common header

#ifndef PCH_H
#define PCH_H
#include <iostream>
#include "hello.h"

${fileComment.multilineComment}
#ifndef APP_H
#define APP_H

#include <string>

namespace ${namespace.groovyString} {
    class Greeter {
        public:
        std::string greeting();
    };
}

# Lernen

Hier finden Sie die einführenden Kapitel und Tutorials zum Erlernen von **FastAPI**.