/// <summary>
/// Walks the supplied System.CodeDom.CodeCompileUnit and produces a corresponding CompilationUnit.
/// Enters declarations into the supplied Module and errors into the supplied ErrorNodeList.
/// Calls back to the supplied compiler to resolve assembly references and to create appropriate documents for code snippets.
/// </summary>
/// <param name="compiler">Called upon to resolve assembly references and to create Documents for snippets.</param>
/// <param name="compilationUnit">The root of the CodeDOM tree to be translated into an IR CompileUnit.</param>
/// <param name="targetModule">The module or assembly to which the compilation unit will be compiled.</param>
/// <param name="errorNodes">Errors in the CodeDOM tree that are found during translation are added to this list.</param>
/// <returns></returns>
public CompilationUnit Translate(Compiler compiler, CodeCompileUnit compilationUnit, Module targetModule, ErrorNodeList errorNodes){
Debug.Assert(compiler != null);
Debug.Assert(compilationUnit != null);
Debug.Assert(targetModule != null);
Debug.Assert(errorNodes != null);
this.compiler = compiler;
this.errorNodes = errorNodes;
this.targetModule = targetModule;
CodeSnippetCompileUnit cscu = compilationUnit as CodeSnippetCompileUnit;
CompilationUnit cunit = cscu != null ? new CompilationUnitSnippet() : new CompilationUnit();
this.Translate(compilationUnit.AssemblyCustomAttributes, targetModule.Attributes);
StringCollection references = compilationUnit.ReferencedAssemblies;
if (references != null && references.Count > 0){
AssemblyReferenceList arefs = targetModule.AssemblyReferences;
TrivialHashtable alreadyReferencedAssemblies = new TrivialHashtable();
for (int i = 0, n = arefs.Count; i < n; i++)
alreadyReferencedAssemblies[arefs[i].Assembly.UniqueKey] = this;
foreach (string rAssemblyName in references)
compiler.AddAssemblyReferenceToModule(null, targetModule, rAssemblyName, null, errorNodes, alreadyReferencedAssemblies, false);
}
Namespace defaultNamespace = new Namespace(Identifier.Empty, Identifier.Empty, null, null, new NamespaceList(), null);
NamespaceList nspaceList = defaultNamespace.NestedNamespaces;
CodeNamespaceCollection nspaces = compilationUnit.Namespaces;
if (nspaces != null)
foreach (CodeNamespace cns in nspaces)
nspaceList.Add(this.Translate(cns));
if (cscu == null) return cunit;
Document doc = null;
if (cscu.LinePragma == null)
doc = compiler.CreateDocument(targetModule.Name, 1, cscu.Value);
else{
doc = compiler.CreateDocument(cscu.LinePragma.FileName, cscu.LinePragma.LineNumber, cscu.Value);
cunit.Name = Identifier.For(cscu.LinePragma.FileName);
}
cunit.SourceContext = new SourceContext(doc);
defaultNamespace.SourceContext = cunit.SourceContext;
return cunit;
}