public string VisitLiteralExpr(Expr.Literal expr)
{
if (expr.Value == null)
{
return("null");
}
return(expr.Value.ToString() !);
}
public string visitLiteralExpr(Expr.Literal expr)
{
if (expr.Value == null)
{
return("none");
}
return(expr.Value.ToString());
}
public TypeSpecifier VisitLiteralExpression(Expr.Literal exp)
{
LLVMValueRef outval;
if (exp.Type == TypeEnum.I8)
{
ulong b = Convert.ToUInt64(exp.Value);
if (b < 0)
{
outval = LLVM.ConstInt(LLVM.Int8Type(), b, _lTrue);
}
else
{
outval = LLVM.ConstInt(LLVM.Int8Type(), b, _lFalse);
}
}
else if (exp.Type == TypeEnum.I16)
{
ulong b = Convert.ToUInt64(exp.Value);
if (b < 0)
{
outval = LLVM.ConstInt(LLVM.Int16Type(), b, _lTrue);
}
else
{
outval = LLVM.ConstInt(LLVM.Int16Type(), b, _lFalse);
}
}
else if (exp.Type == TypeEnum.I32)
{
ulong b = Convert.ToUInt64(exp.Value);
if (b < 0)
{
outval = LLVM.ConstInt(LLVM.Int32Type(), b, _lTrue);
}
else
{
outval = LLVM.ConstInt(LLVM.Int32Type(), b, _lFalse);
}
}
else if (exp.Type == TypeEnum.I64)
{
ulong b = Convert.ToUInt64(exp.Value);
if (b < 0)
{
outval = LLVM.ConstInt(LLVM.Int64Type(), b, _lTrue);
}
else
{
outval = LLVM.ConstInt(LLVM.Int64Type(), b, _lFalse);
}
}
else if (exp.Type == TypeEnum.F32)
{
double d = Convert.ToDouble(exp.Value);
outval = LLVM.ConstReal(LLVM.FloatType(), d);
}
else if (exp.Type == TypeEnum.F64)
{
double d = Convert.ToDouble(exp.Value);
outval = LLVM.ConstReal(LLVM.DoubleType(), d);
}
else if (exp.Type == TypeEnum.BOOL)
{
bool b = Convert.ToBoolean(exp.Value);
if (b)
{
outval = LLVM.ConstInt(LLVM.Int1Type(), 1, _lFalse);
}
else
{
outval = LLVM.ConstInt(LLVM.Int1Type(), 0, _lTrue);
}
}
else if (exp.Type == TypeEnum.STRING)
{
string str = exp.Value.ToString();
outval = LLVM.BuildGlobalStringPtr(_builder, str, "");
//outval = LLVM.ConstString(str, (uint)(str.Length + 1), _lFalse);
}
else
{
throw new Exception("Unknown literal");
}
_valueStack.Push(outval);
return(new TypeSpecifier {
Type = exp.Type, Dimensions = 0
});
}
public object VisitLiteralExpr(Expr.Literal expr)
{
return(null);
}
public VoidObject VisitLiteralExpr(Expr.Literal expr)
{
return(VoidObject.Void);
}
public Token visitLiteralExpr(Expr.Literal literal)
{
return(literal.type);
}
private Stmt ForStatement()
{
Consume(LEFT_PAREN, "Expected \"(\" after \"for\".");
Stmt initializer;
if (Match(SEMICOLON))
{
initializer = null;
}
else if (Match(VAR))
{
initializer = VarDeclaration();
}
else
{
initializer = ExpressionStatement();
}
Expr condition = null;
if (!Check(SEMICOLON))
{
condition = Expression();
}
Consume(SEMICOLON, "Expected \";\" after loop condition");
Expr increment = null;
if (!Check(RIGHT_PAREN))
{
increment = Expression();
}
Consume(RIGHT_PAREN, "Expected \")\" after clauses");
Stmt body = Statement();
if (increment != null)
{
body = new Stmt.Block(new List <Stmt>()
{
body, new Stmt.Expression(increment)
});
}
if (condition == null)
{
condition = new Expr.Literal(true);
}
body = new Stmt.While(condition, body);
if (initializer != null)
{
body = new Stmt.Block(new List <Stmt>()
{
initializer, body
});
}
return(body);
}
public object VisitLiteralExpr(Expr.Literal expr)
{
return(expr.value);
}
/// <summary>
/// Parse a for loop
/// </summary>
/// <returns>The statement</returns>
private Stmt ForStatement()
{
_loop_depth++;
try
{
Consume(TokenType.LEFT_PAREN, "Expect '(' after 'for'.");
// Initializer
Stmt initializer;
if (Match(TokenType.SEMICOLON))
{
// No initialiser
initializer = null;
}
else if (Match(TokenType.VAR))
{
// Its a variable decalration
initializer = VarDeclaration();
}
else
{
// Its an expression
// This must be a _statement_
initializer = ExpressionStatement();
}
// Condition
Expr condition = null;
if (!Check(TokenType.SEMICOLON))
{
condition = Expression();
}
Consume(TokenType.SEMICOLON, "Expect ';' after loop condition.");
// Increment
Expr increment = null;
if (!Check(TokenType.SEMICOLON))
{
increment = Expression();
}
Consume(TokenType.RIGHT_PAREN, "Expect ')' after for clauses.");
// Body
Stmt body = Statement();
// Convert to a while loop
if (increment != null)
{
body = new Stmt.Block(new[] { body, new Stmt.ExpressionStatement(increment) });
}
if (condition == null)
{
// No condition, so set to true
condition = new Expr.Literal(true);
}
body = new Stmt.While(condition, body);
if (initializer != null)
{
body = new Stmt.Block(new[] { initializer, body });
}
return(body);
}
finally
{
_loop_depth--;
}
}
private Stmt ForStatement()
{
Consume(LeftParen, "Expect '(' after 'for'.");
Stmt initializer;
if (Match(Semicolon))
{
initializer = null;
}
else if (Match(Var))
{
initializer = VarDeclaration();
}
else
{
initializer = ExpressionStatement();
}
Expr condition = null;
if (!Check(Semicolon))
{
condition = Expression();
}
Consume(Semicolon, "Expect ';' after loop condition.");
Expr increment = null;
if (!Check(RightParen))
{
increment = Expression();
}
Consume(RightParen, "Expect ')' after for clauses.");
Stmt body = Statement();
if (increment != null)
{
body = new Stmt.Block(
new List <Stmt> {
body, new Stmt.Expression(increment)
});
}
if (condition == null)
{
condition = new Expr.Literal(true);
}
body = new Stmt.While(condition, body);
if (initializer != null)
{
body = new Stmt.Block(new List <Stmt> {
initializer, body
});
}
return(body);
}
public object Visit(Expr.Literal expr)
{
return(expr.Value);
}
public T VisitLiteralExpression(Expr.Literal exp);
public object VisitLiteralExpr(Expr.Literal expr, object options = null)
{
return(null);
}
object Expr.Visitor <object> .VisitLiteralExpr(Expr.Literal expr)
{
return(expr.value);
}
public string VisitLiteralExpr(Expr.Literal expr)
{
return(expr.value == null ? "nil" : expr.value.ToString());
}
public string VisitLiteralExpr(Expr.Literal expr) => expr.Value == null ? "nil" : expr.Value.ToString();
public void Visit(Expr.Literal expr) => _sql.Append($"'{expr.Value}'");
private Stmt ForStatment()
{
try
{
this.LoopCounter += 1;
Consume(LEFT_PAREN, "Exepect '(' after 'for.");
Stmt initialiser;
if (Match(SEMICOLON))
{
initialiser = null;
}
else if (Match(VAR))
{
initialiser = VarDeclaration();
}
else
{
initialiser = ExpressionStatement();
}
Expr Condition = null;
if (!Check(SEMICOLON))
{
Condition = Expression();
}
Consume(SEMICOLON, "Expect ';' after loop condition.");
Expr increment = null;
if (!Check(RIGHT_PAREN))
{
increment = Expression();
}
Consume(RIGHT_PAREN, "Expect ')' after for clausess.");
Stmt body = Statement();
if (increment != null)
{
body = new Stmt.Block(new List <Stmt> {
body, new Stmt.ExpressionStmt(increment)
});
}
if (Condition == null)
{
Condition = new Expr.Literal(true);
}
body = new Stmt.While(Condition, body);
if (initialiser != null)
{
body = new Stmt.Block(new List <Stmt> {
initialiser, body
});
}
return(body);
}
finally
{
LoopCounter--;
}
}
public string VisitLiteralExpr(Expr.Literal expr) => (expr.value == null) ? "null" : expr.value.ToString();
public TrashObject VisitLiteralExpr(Expr.Literal expr)
{
return(expr.Value);
}
public Unit VisitLiteralExpr(Expr.Literal expr)
{
return(new Unit());
}
public LoxVoid VisitLiteralExpr(Expr.Literal expr)
{
return(null);
}