} // NT_Calc
private static void NT_Expr(out int e)
{
int t = 0; e = 0;
for (;;)
{
switch (Syn.Interpret())
{
case 0:
return;
case 1:
NT_Term(out e);
break;
case 2:
NT_Term(out t);
break;
case 3: // SEM
e = e + t;
break;
case 4:
NT_Term(out t);
break;
case 5: // SEM
e = e - t;
break;
} // switch
} // for
} // NT_Expr
} // NT_Expr
private static void NT_Term(out int t)
{
int f = 0; t = 0;
for (;;)
{
switch (Syn.Interpret())
{
case 0:
return;
case 1:
NT_Fact(out t);
break;
case 2:
NT_Fact(out f);
break;
case 3: // SEM
t = t * f;
break;
case 4:
NT_Fact(out f);
break;
case 5: // SEM
t = t / f;
break;
} // switch
} // for
} // NT_Term
public static void StartSem()
{
//-----------------------------------|----------------------------------------
for (;;)
{
switch (Syn.Interpret())
{
case 0:
return;
case 1:
NT_Calc();
break;
} // switch
} // for
} // StartSem
} // NT_Term
private static void NT_Fact(out int f)
{
f = 0;
for (;;)
{
switch (Syn.Interpret())
{
case 0:
return;
case 1:
Lex.GETnumberAttr(out f);
break;
case 2:
NT_Expr(out f);
break;
} // switch
} // for
} // NT_Fact
} // CalcSemMethod
// *** start of global SYN and SEM declarations from ATG ***
// *** end of global SYN and SEM declarations from ATG ***
private static void NT_Calc()
{
int e = 0;
for (;;)
{
switch (Syn.Interpret())
{
case 0:
return;
case 1:
NT_Expr(out e);
break;
case 2: // SEM
Console.WriteLine(e);
break;
} // switch
} // for
} // NT_Calc
private int CompileFile(String expression)
{
try
{
Lex.src = new StringReader(expression);
//Console.WriteLine("parsing ...");
Syn.Parse();
Lex.src.Close();
Lex.src.Dispose();
Lex.src = null;
}
finally
{
if (Lex.src != null)
{
Lex.src.Close();
Lex.src.Dispose();
Lex.src = null;
} // if
Utils.Modules(Utils.ModuleAction.resetModule);
} // try/finally to make sure srcFs and srcReader are closed
return(Utils.EXIT_SUCCESS);
} // CompileFile
} // Abort
private static int CompileFile(String srcFileName)
{
FileStream srcFs = null;
try {
srcFs = new FileStream(srcFileName, FileMode.Open);
} catch (Exception) {
Console.WriteLine("*** file \"{0}\" not found", srcFileName);
return(Utils.EXIT_FAILURE);
} // try/catch
try {
Lex.src = new StreamReader(srcFs);
Console.WriteLine("parsing ...");
Syn.Parse();
Lex.src.Close();
Lex.src.Dispose();
Lex.src = null;
if (Errors.NumOfErrors() > 0)
{
Console.WriteLine("listing ...");
String lstFileName = Path.ChangeExtension(srcFileName, ".lst");
FileStream lstFs = null;
try {
lstFs = new FileStream(lstFileName, FileMode.Create);
} catch (Exception) {
Utils.FatalError(NAME, "CompileFile", "file \"{0}\" not created", lstFileName);
return(Utils.EXIT_FAILURE);
} // try/catch
StreamWriter lstWriter = null;
try {
lstWriter = new StreamWriter(lstFs);
StreamReader srcFsReader = null;
try { // open the source file a second time to generate the error listing
srcFsReader = new StreamReader(new FileStream(srcFileName, FileMode.Open));
lstWriter.WriteLine(NAME + " (file: \"{0}\")", srcFileName);
Errors.GenerateListing(srcFsReader, lstWriter, Errors.ListingShape.longListing);
} finally {
srcFsReader.Close();
srcFsReader.Dispose();
} // try/finally
Console.WriteLine("{0} error(s) detected", Errors.NumOfErrors());
} finally {
lstWriter.Close();
lstWriter.Dispose();
} // try/finally
}
else
{
Console.WriteLine("no errors detected");
}
} finally {
if (Lex.src != null)
{
Lex.src.Close();
Lex.src.Dispose();
Lex.src = null;
} // if
Utils.Modules(Utils.ModuleAction.resetModule);
} // try/finally to make sure srcFs and srcReader are closed
return(Utils.EXIT_SUCCESS);
} // CompileFile
