ControlNode GetControlNode(IList <Token> tokens, ref int index)
{
ControlNode controlNode;
Token token = tokens[index++];
int count = tokens.Count;
switch (token.Type)
{
case TokenType.FI:
controlNode = new FiNode();
break;
case TokenType.FAL:
controlNode = new FalNode();
break;
default:
throw new ApplicationException($"Invalid token: {tokens}");
}
if (index >= count)
{
throw new ApplicationException("End of code in fi syntax");
}
controlNode.CompareExpression = GetCompareNode(tokens, ref index);
if (controlNode.CompareExpression == null)
{
throw new ApplicationException("Not found compare expression");
}
token = tokens[index];
if (token.Type != TokenType.RINYV)
{
throw new ApplicationException($"Not found 'rinyv': fi {controlNode.CompareExpression}");
}
index++;
controlNode.Syntaxes = GetSyntaxNode(tokens, ref index);
token = tokens[index];
if (token.Type != TokenType.SITUV)
{
throw new ApplicationException($"Not found 'situv': fi {controlNode.CompareExpression}");
}
index++;
return(controlNode);
}
protected override void ToFi(FiNode node, IDictionary <IdentifierNode, uint> anaxDictionary)
{
// 内部で使用する変数領域の確保
var anaxList = node.Syntaxes.Where(x => x is AnaxNode)
.Select(x => (x as AnaxNode)).ToList();
int stackCount = anaxList.Select(x => int.Parse(x.Length.Value)).Sum();
int block = this.blockCount++;
this.writer.WriteLine("nta {0} f5 ; allocate variables in fi", stackCount * 4);
// 条件式
OutputExpression(node.CompareExpression, "f0", anaxDictionary);
this.writer.WriteLine("fi f0 0 clo malkrz --fi-{0}-- xx ; rinyv fi", block);
int count = 0;
for (int i = 0; i < anaxList.Count; i++)
{
AnaxNode anax = anaxList[i];
if (anaxDictionary.ContainsKey(anax.Name))
{
throw new ApplicationException($"Duplication variable name: {anax.Name} in fi");
}
count += int.Parse(anax.Length.Value);
anaxDictionary.Add(anax.Name, (uint)(-(this.cersvaStackCount + count) * 4));
ToAnax(anax, anaxDictionary);
}
// 文の処理
OutputSyntax(node.Syntaxes, anaxDictionary);
// 内部で使用した変数領域の解放
foreach (var anax in anaxList)
{
anaxDictionary.Remove(anax.Name);
}
this.writer.WriteLine("nll --fi-{0}-- ata {1} f5 ; situv fi", block, stackCount * 4);
}
protected abstract void ToFi(FiNode node, IDictionary <IdentifierNode, uint> anaxDictionary);