private void CompileSwitchStatement(Parser parser, ByteBuffer buffer, SwitchStatement switchStatement)
{
this.CompileExpression(parser, buffer, switchStatement.Condition, true);
ByteBuffer chunkBuffer = new ByteBuffer();
Dictionary<int, int> chunkIdsToOffsets = new Dictionary<int, int>();
Dictionary<int, int> integersToChunkIds = new Dictionary<int,int>();
Dictionary<string, int> stringsToChunkIds = new Dictionary<string,int>();
int defaultChunkId = -1;
foreach (SwitchStatement.Chunk chunk in switchStatement.Chunks)
{
int chunkId = chunk.ID;
if (chunk.Cases.Length == 1 && chunk.Cases[0] == null)
{
defaultChunkId = chunkId;
}
else
{
foreach (Expression expression in chunk.Cases)
{
if (switchStatement.UsesIntegers)
{
integersToChunkIds[((IntegerConstant)expression).Value] = chunkId;
}
else
{
stringsToChunkIds[((StringConstant)expression).Value] = chunkId;
}
}
}
chunkIdsToOffsets[chunkId] = chunkBuffer.Size;
this.Compile(parser, chunkBuffer, chunk.Code);
}
chunkBuffer.ResolveBreaks();
int switchId = parser.RegisterByteCodeSwitch(switchStatement.FirstToken, chunkIdsToOffsets, integersToChunkIds, stringsToChunkIds, switchStatement.UsesIntegers);
int defaultOffsetLength = defaultChunkId == -1
? chunkBuffer.Size
: chunkIdsToOffsets[defaultChunkId];
buffer.Add(switchStatement.FirstToken, switchStatement.UsesIntegers ? OpCode.SWITCH_INT : OpCode.SWITCH_STRING, switchId, defaultOffsetLength);
buffer.Concat(chunkBuffer);
}
