private CodeExpression BuildExpression(XSharpParser.ExpressionContext expression, bool right )
{
CodeExpression expr = null;
//
if (expression is XSharpParser.PrimaryExpressionContext) // xyz.SimpleName
{
expr = BuildExpression((XSharpParser.PrimaryExpressionContext)expression);
}
else if (expression is XSharpParser.AccessMemberContext) // xyz.SimpleName
{
XSharpParser.AccessMemberContext member = (XSharpParser.AccessMemberContext)expression;
//what is the left hand side ?
// Self -> check if Right is in the member of CurrentClass --> FieldReference
// else --> always Property
bool isMember = false;
CodeExpression left = BuildExpression(member.Expr,false);
if (left is CodeThisReferenceExpression)
{
string fieldCandidate = member.Name.GetText();
foreach (CodeTypeMember cm in this.CurrentClass.Members)
{
if (cm is CodeMemberField)
{
if (String.Compare(fieldCandidate, cm.Name, true) == 0)
{
isMember = true;
break;
}
}
}
}
// It seems to be a member...
if (isMember)
{
expr = new CodeFieldReferenceExpression(BuildExpression(member.Expr,false), member.Name.GetText());
}
else
{
// Let's guess that on the Left member, we should have a Property if it is not a Field
if (!right)
{
expr = new CodePropertyReferenceExpression(BuildExpression(member.Expr, false), member.Name.GetText());
}
else
{
// We are processing the Right member of an Assignment...
// Most likely Enum Value, which is a typereference expression followed by a DOT and a field
if (member.DOT() != null) {
var typeexpr = new CodeTypeReferenceExpression(member.Expr.GetText());
expr = new CodeFieldReferenceExpression(typeexpr, member.Name.GetText());
}
else {
expr = new CodeSnippetExpression(member.GetText());
}
}
}
}
else if (expression is XSharpParser.MethodCallContext)
{
XSharpParser.MethodCallContext meth = (XSharpParser.MethodCallContext)expression;
CodeExpression target = BuildExpression(meth.Expr,false);
List<CodeExpression> exprlist = new List<CodeExpression>();
if (meth.ArgList != null)
{
foreach (var arg in meth.ArgList._Args)
{
exprlist.Add(BuildExpression(arg.Expr,false));
}
}
if (target is CodeFieldReferenceExpression)
{
//
expr = new CodeMethodInvokeExpression(((CodeFieldReferenceExpression)target).TargetObject, ((CodeFieldReferenceExpression)target).FieldName, exprlist.ToArray());
}
else if (target is CodePropertyReferenceExpression)
{
//
expr = new CodeMethodInvokeExpression(((CodePropertyReferenceExpression)target).TargetObject, ((CodePropertyReferenceExpression)target).PropertyName, exprlist.ToArray());
}
else
expr = new CodeMethodInvokeExpression(null, meth.Expr.GetText(), exprlist.ToArray());
}
else
{
expr = new CodeSnippetExpression(expression.GetText());
}
//
return expr;
}
/// <summary>
/// Get a LiteralValueContext containing a BIN_CONST, INT_CONST, HEX_CONST, or a REAL_CONST
/// as a String, and convert it to the "real" value, with the corresponding Type.
/// </summary>
/// <param name="context"></param>
/// <returns>An Object of the needed Type, with the value</returns>
private object GetNumericValue(XSharpParser.LiteralValueContext context)
{
Object ret = null;
String value = context.GetText();
//
if (context.BIN_CONST() != null || context.INT_CONST() != null || context.HEX_CONST() != null)
{
bool isUnsigned = (value.Substring(0, 1).ToLower().CompareTo("u") == 0);
// -1 for Unsigned; -2 for 0x or 0b
int len = value.Length - (isUnsigned ? 1 : 0) - (context.BIN_CONST() != null || context.HEX_CONST() != null ? 2 : 0);
//
if (context.BIN_CONST() != null)
{
if (len > 64)
{
ret = Double.NaN;
}
else
{
// Don't forget to remove the prefix !!!
value = value.Substring(2);
// BIN are always unsigned (??)
UInt64 bin64;
try
{
bin64 = Convert.ToUInt64(value, 2);
// Maybe 32 bits is enough ?
if (bin64 <= UInt32.MaxValue)
{
UInt32 bin32 = Convert.ToUInt32(bin64);
ret = bin32;
}
else
{
ret = bin64;
}
}
catch
{
ret = Double.NaN;
}
}
}
else if (context.HEX_CONST() != null)
{
if (len > 16)
{
ret = Double.NaN;
}
else
{
// Don't forget to remove the prefix !!!
value = value.Substring(2);
// HEX are always unsigned (??)
UInt64 hex64;
try
{
hex64 = Convert.ToUInt64(value, 16);
// Maybe 32 bits is enough ?
if (hex64 <= UInt32.MaxValue)
{
UInt32 hex32 = Convert.ToUInt32(hex64);
ret = hex32;
}
else
{
ret = hex64;
}
}
catch
{
ret = Double.NaN;
}
}
}
else
{
// context.INT_CONST() != null
if (len > 64)
{
ret = Double.NaN;
}
else if (isUnsigned)
{
UInt64 myUInt64;
try
{
myUInt64 = Convert.ToUInt64(value, 10);
// Maybe 32 bits is enough ?
if (myUInt64 <= UInt32.MaxValue)
{
UInt32 myUInt32 = Convert.ToUInt32(myUInt64);
ret = myUInt32;
}
else
{
ret = myUInt64;
}
}
catch
{
ret = Double.NaN;
}
}
else
{
Int64 myInt64;
try
{
myInt64 = Convert.ToInt64(value, 10);
// Maybe 32 bits is enough ?
if ((myInt64 >= UInt32.MinValue) && (myInt64 <= UInt32.MaxValue))
{
Int32 myInt32 = Convert.ToInt32(myInt64);
ret = myInt32;
}
else
{
ret = myInt64;
}
}
catch
{
ret = Double.NaN;
}
}
}
}
else
{
double d;
// Should be REAL_CONST
if (!double.TryParse(value, out d))
{
d = double.NaN;
}
ret = d;
}
return ret;
}
private CodeTypeReference BuildXBaseType(XSharpParser.XbaseTypeContext xbaseType)
{
CodeTypeReference expr = null;
//
if ((xbaseType.ARRAY() != null) ||
(xbaseType.CODEBLOCK() != null) ||
(xbaseType.DATE() != null) ||
(xbaseType.FLOAT() != null) ||
(xbaseType.PSZ() != null) ||
(xbaseType.SYMBOL() != null) ||
(xbaseType.USUAL() != null))
{
expr = new CodeTypeReference(xbaseType.GetText());
}
//
return expr;
}
private CodeExpression BuildLiteralValue(XSharpParser.LiteralValueContext context)
{
CodeExpression expr = null;
ITerminalNode node;
//
node = context.BIN_CONST();
if (node != null)
{
expr = new CodePrimitiveExpression(GetNumericValue(context));
}
node = context.INT_CONST();
if (node != null)
{
expr = new CodePrimitiveExpression(GetNumericValue(context));
}
//
node = context.HEX_CONST();
if (node != null)
{
expr = new CodePrimitiveExpression(GetNumericValue(context));
}
//
node = context.REAL_CONST();
if (node != null)
{
expr = new CodePrimitiveExpression(GetNumericValue(context));
}
//
node = context.TRUE_CONST();
if (node != null)
{
expr = new CodePrimitiveExpression(true);
}
//
node = context.FALSE_CONST();
if (node != null)
{
expr = new CodePrimitiveExpression(false);
}
//
node = context.STRING_CONST();
if (node != null)
{
// Remove the quotes
String value = context.GetText();
value = value.Substring(1, value.Length - 2);
expr = new CodePrimitiveExpression(value);
}
//
node = context.ESCAPED_STRING_CONST();
if (node != null)
{
// Remove the e in front of quotes, AND the Quotes
String value = context.GetText();
value = value.Substring(1);
value = value.Substring(1, value.Length - 2);
expr = new CodePrimitiveExpression(BuildUnEscapedString(value));
}
//
node = context.CHAR_CONST();
if (node != null)
{
// Remove the quotes
String value = context.GetText();
value = value.Substring(1, value.Length - 2);
if (value.Length >= 1)
expr = new CodePrimitiveExpression(value[0]);
}
//
node = context.NIL();
if (node != null)
{
expr = new CodeSnippetExpression("NIL");
}
//
node = context.NULL();
if (node != null)
{
expr = new CodePrimitiveExpression(null);
}
//
node = context.NULL_ARRAY();
if (node != null)
{
expr = new CodeSnippetExpression("NULL_ARRAY");
}
//
node = context.NULL_CODEBLOCK();
if (node != null)
{
expr = new CodeSnippetExpression("NULL_CODEBLOCK");
}
//
node = context.NULL_DATE();
if (node != null)
{
expr = new CodeSnippetExpression("NULL_DATE");
}
//
node = context.NULL_OBJECT();
if (node != null)
{
expr = new CodeSnippetExpression("NULL_OBJECT");
}
//
node = context.NULL_PSZ();
if (node != null)
{
expr = new CodeSnippetExpression("NULL_PSZ");
}
//
node = context.NULL_PTR();
if (node != null)
{
expr = new CodeSnippetExpression("NULL_PTR");
}
//
node = context.NULL_STRING();
if (node != null)
{
expr = new CodeSnippetExpression("NULL_STRING");
}
//
node = context.NULL_SYMBOL();
if (node != null)
{
expr = new CodeSnippetExpression("NULL_SYMBOL");
}
//
node = context.SYMBOL_CONST();
if (node != null)
{
expr = new CodeSnippetExpression(context.GetText().ToUpper());
}
//
node = context.DATE_CONST();
if (node != null)
{
expr = new CodeSnippetExpression(context.GetText());
}
//
if ( expr == null )
{
expr = new CodeSnippetExpression(context.GetText());
}
return expr;
}
private CodeTypeReference BuildNativeType(XSharpParser.NativeTypeContext nativeType)
{
CodeTypeReference expr = null;
//
if ((nativeType.BYTE() != null) ||
(nativeType.CHAR() != null) ||
(nativeType.DWORD() != null) ||
(nativeType.DYNAMIC() != null) ||
(nativeType.INT() != null) ||
(nativeType.INT64() != null) ||
(nativeType.LOGIC() != null) ||
(nativeType.LONGINT() != null) ||
(nativeType.OBJECT() != null) ||
(nativeType.PTR() != null) ||
(nativeType.REAL4() != null) ||
(nativeType.REAL8() != null) ||
(nativeType.SHORTINT() != null) ||
(nativeType.STRING() != null) ||
(nativeType.UINT64() != null) ||
(nativeType.VOID() != null) ||
(nativeType.WORD() != null))
{
expr = BuildNativeType(nativeType.GetText());
}
//
return expr;
}