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/*----------------------------------------------------------

This Source Code Form is subject to the terms of the

Mozilla Public License, v.2.0. If a copy of the MPL

was not distributed with this file, You can obtain one

at http://mozilla.org/MPL/2.0/.

----------------------------------------------------------*/

using System;

using OneScript.Compilation;

using OneScript.Compilation.Binding;

using OneScript.Contexts;

using OneScript.DependencyInjection;

using OneScript.Execution;

using OneScript.Language;

using OneScript.Language.SyntaxAnalysis;

using OneScript.Language.SyntaxAnalysis.AstNodes;

using ScriptEngine.Machine.Contexts;

using ScriptEngine.Machine.Debugger;

namespace ScriptEngine.Compiler

{

/// <summary>

/// Часть компилятора, независимая от рантайма (нативного или стекового)

/// Запускает компиляцию модуля, строит AST и делегирует построение кода в бэкенд компилятора под конкретный рантайм.

/// </summary>

public class CompilerFrontend : CompilerFrontendBase

{

private readonly IDependencyResolver _dependencyResolver;

private readonly PredefinedInterfaceResolver _interfaceResolver;

private readonly OneScriptCoreOptions _options;

private readonly CompilerBackendSelector _backendSelector;

public CompilerFrontend(

PreprocessorHandlers handlers,

IErrorSink errorSink,

IServiceContainer services,

IDependencyResolver dependencyResolver,

PredefinedInterfaceResolver interfaceResolver,

OneScriptCoreOptions options) : base(handlers, errorSink, services)

{

_dependencyResolver = dependencyResolver;

_interfaceResolver = interfaceResolver;

_options = options;

_backendSelector = services.Resolve<CompilerBackendSelector>();

_backendSelector.NativeBackendInitializer = NativeInitializer;

_backendSelector.StackBackendInitializer = StackInitializer;

}

private ICompilerBackend StackInitializer()

{

var actualBehavior = _options.ExplicitImports;

if (_options.ExplicitImports == ExplicitImportsBehavior.Development)

{

var dbg = Services.TryResolve<IDebugger>();

if (dbg == null || dbg.IsEnabled == false)

{

actualBehavior = ExplicitImportsBehavior.Disabled;

}

else

{

actualBehavior = ExplicitImportsBehavior.Warn;

}

}

var backend = new DefaultCompilerBackend(ErrorSink, actualBehavior);

SetDefaultOptions(backend);

backend.DependencyResolver = _dependencyResolver;

return backend;

}

private ICompilerBackend NativeInitializer()

{

var backend = new NativeCompilerBackend(ErrorSink, Services);

SetDefaultOptions(backend);

return backend;

}

private void SetDefaultOptions(ICompilerBackend backend)

{

backend.GenerateCodeStat = GenerateCodeStat;

backend.GenerateDebugCode = GenerateDebugCode;

}

protected override IExecutableModule CompileInternal(SymbolTable symbols, ModuleNode parsedModule, Type classType, IBslProcess process)

{

var backend = _backendSelector.Select(parsedModule);

backend.Symbols = symbols;

var module = backend.Compile(parsedModule, classType, process);

_interfaceResolver.Resolve(module);

return module;

}

protected override IExecutableModule CompileExpressionInternal(SymbolTable symbols, ModuleNode parsedModule)

{

var backend = _backendSelector.Select(parsedModule);

backend.Symbols = symbols;

return backend.Compile(parsedModule, typeof(UserScriptContextInstance), ForbiddenBslProcess.Instance);

}

protected override IExecutableModule CompileBatchInternal(SymbolTable symbols, ModuleNode parsedModule)

{

var backend = _backendSelector.Select(parsedModule);

backend.Symbols = symbols;

return backend.Compile(parsedModule, typeof(UserScriptContextInstance), ForbiddenBslProcess.Instance);

}

}

}