internal async Task <LocalizedAssemblyView> GetOrImportAssembly(ParserContext parser, Token throwToken, string fullImportNameWithDots)
{
LocalizedAssemblyView asmView = await this.GetOrImportAssemblyImpl(parser, throwToken, fullImportNameWithDots);
if (asmView != null && asmView.Scope != parser.CurrentScope)
{
parser.CurrentScope.AddDependency(throwToken, asmView);
}
return(asmView);
}
internal void AddDependency(Token throwToken, LocalizedAssemblyView view)
{
if (this.dependenciesAndViews.ContainsKey(view.Scope))
{
if (this.dependenciesAndViews[view.Scope] != view)
{
throw ParserException.ThrowException(
view.Locale,
ErrorMessages.CANNOT_IMPORT_SAME_LIBRARY_FROM_DIFFERENT_LOCALES,
throwToken);
}
}
this.dependenciesAndViews[view.Scope] = view;
this.Metadata.RegisterDependencies(view.Scope.Metadata);
}
public async Task ParseFile(string filename, string code)
{
FileScope fileScope = new FileScope(filename, code, this.CurrentScope, this.GetNextFileId());
this.RegisterFileUsed(fileScope, code);
TokenStream tokens = new TokenStream(fileScope);
List <string> namespaceImportsBuilder = new List <string>();
// Implicitly import the Core library for the current locale.
LocalizedAssemblyView implicitCoreImport = await this.ScopeManager.GetCoreLibrary(this);
namespaceImportsBuilder.Add(implicitCoreImport.Name);
fileScope.Imports.Add(new ImportStatement(null, implicitCoreImport.Name, fileScope));
while (tokens.HasMore && tokens.IsNext(this.Keywords.IMPORT))
{
ImportStatement importStatement = this.TopLevelParser.ParseImport(tokens, fileScope);
if (importStatement == null)
{
throw new Exception();
}
namespaceImportsBuilder.Add(importStatement.ImportPath);
LocalizedAssemblyView localizedAssemblyView = await this.ScopeManager.GetOrImportAssembly(this, importStatement.FirstToken, importStatement.ImportPath);
if (localizedAssemblyView == null)
{
this.unresolvedImports.Add(importStatement);
}
}
string[] namespaceImports = namespaceImportsBuilder.ToArray();
while (tokens.HasMore)
{
this.CurrentScope.AddExecutable(this.TopLevelParser.Parse(tokens, null, fileScope));
}
}
private async Task <LocalizedAssemblyView> GetOrImportAssemblyImpl(ParserContext parser, Token throwToken, string fullImportNameWithDots)
{
// TODO: allow importing from a user-specified locale
Locale fromLocale = parser.CurrentLocale;
string name = fullImportNameWithDots.Contains('.') ? fullImportNameWithDots.Split('.')[0] : fullImportNameWithDots;
string secondAttemptedKey = name;
ExternalAssemblyMetadata assemblyMetadata = await this.GetAssemblyMetadataFromAnyPossibleKey(fromLocale.ID, name);
Locale effectiveLocale = fromLocale;
if (assemblyMetadata == null)
{
assemblyMetadata = await this.GetAssemblyMetadataFromAnyPossibleKey(null, name);
if (assemblyMetadata != null &&
assemblyMetadata.SupportedLocales.Contains(fromLocale) &&
assemblyMetadata.InternalLocale != fromLocale)
{
// Coincidental cross-language collision.
return(null);
}
if (assemblyMetadata == null)
{
// Simply no matches at all.
return(null);
}
effectiveLocale = assemblyMetadata.InternalLocale;
}
// Are there any restrictions on importing that library from this location?
if (!assemblyMetadata.IsAllowedImport(parser.CurrentLibrary))
{
throw new ParserException(throwToken, "This library cannot be imported from here.");
}
// Ensure all secondary lookups for each locale is instantiated to make the upcoming code more readable.
if (!this.importedAssembliesByLocalizedName.ContainsKey(effectiveLocale))
{
this.importedAssembliesByLocalizedName[effectiveLocale] = new Dictionary <string, LocalizedAssemblyView>();
}
if (!this.importedAssembliesByLocalizedName.ContainsKey(assemblyMetadata.InternalLocale))
{
this.importedAssembliesByLocalizedName[assemblyMetadata.InternalLocale] = new Dictionary <string, LocalizedAssemblyView>();
}
// Check to see if this library has been imported before.
if (this.importedAssembliesById.ContainsKey(assemblyMetadata.ID))
{
// Is it imported by the same locale?
if (this.importedAssembliesByLocalizedName[effectiveLocale].ContainsKey(name))
{
// Then just return the previous instance as-is.
return(this.importedAssembliesByLocalizedName[effectiveLocale][name]);
}
// Wrap the previous instance in the new locale.
LocalizedAssemblyView output = new LocalizedAssemblyView(effectiveLocale, this.importedAssembliesById[assemblyMetadata.ID]);
this.importedAssembliesByLocalizedName[effectiveLocale][output.Name] = output;
return(output);
}
Dictionary <string, string> sourceCode = assemblyMetadata.SourceCode;
string arbitraryFilename = sourceCode.Keys.Where(t => t.Contains('.')).Select(t => t.ToLowerInvariant()).FirstOrDefault();
ProgrammingLanguage programmingLanguage = arbitraryFilename != null && arbitraryFilename.EndsWith(".acr")
? ProgrammingLanguage.ACRYLIC
: ProgrammingLanguage.CRAYON;
// If the assembly exists but hasn't been imported before, instantiate it and
// add it to all the lookups. This needs to happen before parsing the embedded
// code to prevent infinite recursion.
CompilationScope compilationScope = new CompilationScope(parser, assemblyMetadata, assemblyMetadata.InternalLocale, programmingLanguage);
this.assembliesAlreadyImportedIndexByKey[assemblyMetadata.CanonicalKey] = this.ImportedAssemblyScopes.Count;
this.ImportedAssemblyScopes.Add(compilationScope);
this.importedAssembliesById[assemblyMetadata.ID] = compilationScope;
LocalizedAssemblyView localizedView = new LocalizedAssemblyView(effectiveLocale, compilationScope);
this.importedAssembliesByLocalizedName[effectiveLocale][name] = localizedView;
// Parse the assembly.
parser.PushScope(compilationScope);
foreach (string file in sourceCode.Keys.OrderBy(s => s.ToLowerInvariant()))
{
string fakeName = "[" + file + "]";
string code = sourceCode[file];
await parser.ParseFile(fakeName, code);
}
parser.PopScope();
return(localizedView);
}
