void GenerateCode(Node node, Parser.Statement parseNode, string line)
{
// Does this line have a "#line:LINENUM" tag? Use it
string lineID = GetLineIDFromNodeTags(parseNode);
var num = program.RegisterString(line, node.name, lineID, parseNode.lineNumber, true);
Emit(node, ByteCode.RunLine, num);
}
public static CompileContext CompileGMLText(string input, CompileContext context, bool redoAssets = false)
{
context.Setup(redoAssets); // Set up
List <Lexer.Token> tokens = Lexer.LexString(context, input); // Peform lexical analysis
Parser.Statement block = Parser.ParseTokens(context, tokens); // Parse tokens, make syntax tree
// Optimize and process syntax tree
Parser.Statement optimizedBlock = null;
if (Parser.ErrorMessages.Count == 0)
{
optimizedBlock = Parser.Optimize(context, block);
}
// Handle errors from either function
if (Parser.ErrorMessages.Count > 0)
{
StringBuilder sb = new StringBuilder();
sb.AppendFormat("Error{0} parsing code:", Parser.ErrorMessages.Count == 1 ? "" : "s");
sb.AppendLine();
sb.AppendLine();
foreach (string msg in Parser.ErrorMessages)
{
sb.AppendLine(msg);
}
context.SetError(sb.ToString());
return(context);
}
CodeWriter codeWriter = AssemblyWriter.AssembleStatement(context, optimizedBlock); // Write assembly code
context.ResultAssembly = codeWriter.Finish();
if (codeWriter.ErrorMessages.Count > 0)
{
StringBuilder sb = new StringBuilder();
sb.AppendFormat("Error{0} writing assembly code:", codeWriter.ErrorMessages.Count == 1 ? "" : "s");
sb.AppendLine();
sb.AppendLine();
foreach (string msg in codeWriter.ErrorMessages)
{
sb.AppendLine(msg);
}
sb.AppendLine();
sb.Append(context.ResultAssembly);
context.SetError(sb.ToString());
return(context);
}
context.OnSuccessfulFinish();
return(context);
}
// Statements
void GenerateCode(Node node, Parser.Statement statement)
{
switch (statement.type)
{
case Parser.Statement.Type.CustomCommand:
GenerateCode(node, statement.customCommand);
break;
case Parser.Statement.Type.ShortcutOptionGroup:
GenerateCode(node, statement.shortcutOptionGroup);
break;
case Parser.Statement.Type.Block:
// Blocks are just groups of statements
foreach (var blockStatement in statement.block.statements)
{
GenerateCode(node, blockStatement);
}
break;
case Parser.Statement.Type.IfStatement:
GenerateCode(node, statement.ifStatement);
break;
case Parser.Statement.Type.OptionStatement:
GenerateCode(node, statement.optionStatement);
break;
case Parser.Statement.Type.AssignmentStatement:
GenerateCode(node, statement.assignmentStatement);
break;
case Parser.Statement.Type.Line:
GenerateCode(node, statement.line);
break;
default:
throw new ArgumentOutOfRangeException();
}
}
private void EmitLinePart(Node node, Parser.Statement parseNode, String part, String lineID)
{
if (part[0] == '$')
{
node.instructions.Add(new Instruction
{
operation = ByteCode.PushVariable,
operandA = part,
operandB = null
});
}
else
{
var num = program.RegisterString(part, node.name, lineID, parseNode.lineNumber, true);
node.instructions.Add(new Instruction
{
operation = ByteCode.PushString,
operandA = num,
operandB = null
});
}
}
void GenerateCode(Node node, Parser.Statement parseNode, string line)
{
// Does this line have a "#line:LINENUM" tag? Use it
string lineID = GetLineIDFromNodeTags(parseNode);
var parts = new List <String>();
var currentPart = "";
foreach (var c in line)
{
if (c == '$')
{
if (currentPart.Length > 0)
{
parts.Add(currentPart);
}
currentPart = "$";
}
else
{
if (currentPart.Length > 0 && currentPart[0] == '$' && ",.?!: ".Contains(new string(c, 1)))
{
parts.Add(currentPart);
currentPart = new string(c, 1);
}
else
{
currentPart += c;
}
}
}
if (currentPart.Length > 0)
{
parts.Add(currentPart);
}
if (parts.Count == 1)
{
var num = program.RegisterString(line, node.name, lineID, parseNode.lineNumber, true);
Emit(node, ByteCode.RunLine, num);
}
else
{
EmitLinePart(node, parseNode, parts[0], lineID);
for (var i = 1; i < parts.Count; ++i)
{
EmitLinePart(node, parseNode, parts[i], lineID);
node.instructions.Add(new Instruction
{
operation = ByteCode.Concat,
operandA = null,
operandB = null
});
}
node.instructions.Add(new Instruction
{
operation = ByteCode.RunLineFromStack,
operandA = null,
operandB = null
});
}
}
// Run a single statement.
private IEnumerable <Dialogue.RunnerResult> RunStatement(Parser.Statement statement)
{
switch (statement.type)
{
case Parser.Statement.Type.Block:
// Blocks just contain statements, so run them!
foreach (var command in RunStatements(statement.block.statements))
{
yield return(command);
}
break;
case Parser.Statement.Type.Line:
// Lines get forwarded to the client for display
yield return(new Dialogue.LineResult(statement.line));
break;
case Parser.Statement.Type.IfStatement:
// Evaluate each clause in the statement, and run its statements if appropriate
foreach (var clause in statement.ifStatement.clauses)
{
// if this clause's expression doesn't evaluate to 0, run it; alternatively,
// if this clause has no expression (ie it's the 'else' clause) then also run it
if (clause.expression == null || EvaluateExpression(clause.expression).AsBool != false)
{
foreach (var command in RunStatements(clause.statements))
{
yield return(command);
}
// don't continue on to the other clauses
break;
}
}
break;
case Parser.Statement.Type.OptionStatement:
// If we encounter an option, record it so that we can present it later
currentOptions.Add(statement.optionStatement);
break;
case Parser.Statement.Type.AssignmentStatement:
// Evaluate the expression and assign it to a variable
RunAssignmentStatement(statement.assignmentStatement);
break;
case Parser.Statement.Type.ShortcutOptionGroup:
// Evaluate and present the options, then run the stuff that came after the options
foreach (var command in RunShortcutOptionGroup(statement.shortcutOptionGroup))
{
yield return(command);
}
break;
case Parser.Statement.Type.CustomCommand:
// Deal with a custom command - it's either an expression or a client command
// If it's an expression, evaluate it
// If it's a client command, yield it to the client
switch (statement.customCommand.type)
{
case Parser.CustomCommand.Type.Expression:
EvaluateExpression(statement.customCommand.expression);
break;
case Parser.CustomCommand.Type.ClientCommand:
yield return(new Dialogue.CommandResult(statement.customCommand.clientCommand));
break;
}
break;
default:
// Just in case we added a new type of statement and didn't implement it here
throw new NotImplementedException("YarnRunner: Unimplemented statement type " + statement.type);
}
}