// translates the Deslang code into the equivalent C# code by visiting all AST root nodes
// assumes that the ASTs have all been properly type checked prior to translating the code
public string Generate(List <ProgramNode> ASTRoots)
{
_CSharpCode.AppendLine("using System;");
_CSharpCode.AppendLine("using Deslang.CodeGeneration;"); // reference to the namespace containing stdlib
_CSharpCode.AppendLine("namespace Deslang"); // build the C# code in the 'Deslang' namespace so the runtime can correctly identify it
_CSharpCode.AppendLine("{");
IncreaseIndent();
foreach (ProgramNode AST in ASTRoots)
{
AST.Accept(this, null);
}
DecreaseIndent();
_CSharpCode.AppendLine("}");
return(_CSharpCode.ToString());
}
public static void Main(string[] args)
{
string filename = null;
bool printAST = false;
bool printASTtc = false;
foreach (string arg in args)
{
if (arg.StartsWith("-"))
{
switch (arg)
{
case "-ast":
printAST = true; break;
case "-tc":
printASTtc = true; break;
default:
Console.WriteLine("Unknown option {0}, ignored", arg);
break;
}
}
else
{
if (filename != null)
{
Usage();
}
filename = arg;
}
}
// require exactly one input file to be provided
if (filename == null)
{
Usage();
}
// require a filename suffix of .cb or .cs
if (!filename.EndsWith(".cb") && !filename.EndsWith(".cs"))
{
Usage();
}
AST tree = DoParse(filename);
if (tree == null)
{
Console.WriteLine("\n-- no tree constructed");
return;
}
if (printAST)
{
PrVisitor printVisitor = new PrVisitor();
tree.Accept(printVisitor);
}
int numErrors = 0;
// perform typechecking ...
TcVisitor typeCheckVisitor = new TcVisitor();
tree.Accept(typeCheckVisitor);
numErrors = typeCheckVisitor.NumErrors;
if (printASTtc)
{
PrVisitor printVisitor = new PrVisitor();
tree.Accept(printVisitor); // print AST with datatype annotations
}
string asmFileName = filename.Substring(0, filename.Length - 2) + "s";
BackEnd.GenCode cgen = new BackEnd.GenCode();
cgen.GenProgram(tree);
if (numErrors > 0)
{
Console.WriteLine("\n{0} errors reported, compilation halted", numErrors);
return;
}
if (cgen.Asm != null)
{
cgen.Asm.WriteCode(asmFileName);
Console.WriteLine("Assembler code written to {0}", asmFileName);
}
}
public static void Main(string[] args)
{
string filename = null;
bool printAST = false;
bool printASTtc = false;
foreach (string arg in args)
{
if (arg.StartsWith("-"))
{
switch (arg)
{
case "-ast":
printAST = true; break;
case "-tc":
printASTtc = true; break;
default:
Console.WriteLine("Unknown option {0}, ignored", arg);
break;
}
}
else
{
if (filename != null)
{
Usage();
}
filename = arg;
}
}
// require exactly one input file to be provided
if (filename == null)
{
Usage();
}
// require a filename suffix of .cb or .cs
if (!filename.EndsWith(".cb") && !filename.EndsWith(".cs"))
{
Usage();
}
AST tree = DoParse(filename);
if (tree == null)
{
Console.WriteLine("\n-- no tree constructed");
return;
}
if (printAST)
{
PrVisitor printVisitor = new PrVisitor();
tree.Accept(printVisitor);
}
/*
* int numErrors;
*
* // perform typechecking ...
*
* if (printASTtc) {
* PrVisitor printVisitor = new PrVisitor();
* tree.Accept(printVisitor); // print AST with datatype annotations
* }
*
* // generate intermediate code
*
* if (numErrors > 0) {
* Console.WriteLine("\n{0} errors reported, compilation halted", numErrors);
* return;
* }
*/
}