public void Visit(WhileNode n)
{
var table = (FunctionSymbolTableEntry)n.SymTable;
var children = n.GetChildren();
_writer.WriteComment("While Loop");
var beginBranch = $"WhileBranch_begin_{_branchCounter}";
var endBranch = $"WhileBranch_end_{_branchCounter}";
++_branchCounter;
// Write begin branch
_writer.WriteTag(beginBranch);
// Write compare operations
children[0].Accept(this);
// Write jump logic
var compareResultVar = children[0].TemporaryVariableName;
var compareResultOffset = table.MemoryLayout.GetOffset(compareResultVar);
var compareResultReg = PopRegister();
_writer.WriteInstruction(Instructions.Lw, compareResultReg, $"{compareResultOffset}({FSPReg})");
_writer.WriteInstruction(Instructions.Bz, compareResultReg, endBranch);
PushRegister(compareResultReg);
// Write statement block
children[1].Accept(this);
_writer.WriteInstruction(Instructions.J, beginBranch);
_writer.WriteTag(endBranch);
}
public void Visit(WhileNode n)
{
foreach (var node in n.GetChildren())
{
node.SymTable = n.SymTable;
node.Accept(this);
}
}
public void Visit(WhileNode n)
{
PrintDOTIDLabel(n);
PrintDOTParentChild(n);
foreach (var child in n.GetChildren())
{
child.Accept(this);
}
}
public void Visit(WhileNode n)
{
var children = n.GetChildren();
foreach (var child in children)
{
child.Accept(this);
}
}
public void RepeatTestNodeWithoutBody_ShouldHaveNoChildren()
{
var ast = TestHelpers.MakeAstRoot("function testFunction -> | void\nwhile 2 do\n endwhile\nendfunction");
FunctionNode funcNode = ast.GetChildren(0) as FunctionNode;
WhileNode whileNode = funcNode.GetChildren(0) as WhileNode;
Assert.That(whileNode.GetChildren(0), Is.Null);
}