public static IStatement GetStatement(ParseInfo parseInfo, Scope scope, DeltinScriptParser.StatementContext statementContext)
{
switch (statementContext)
{
case DeltinScriptParser.S_defineContext define: {
var newVar = new ScopedVariable(scope, new DefineContextHandler(parseInfo, define.define()));
return(new DefineAction(newVar));
}
case DeltinScriptParser.S_methodContext method: return(new CallMethodAction(parseInfo, scope, method.method(), false, scope));
case DeltinScriptParser.S_varsetContext varset: return(new SetVariableAction(parseInfo, scope, varset.varset()));
case DeltinScriptParser.S_exprContext s_expr: {
var expr = GetExpression(parseInfo, scope, s_expr.expr(), true, false);
if (expr is ExpressionTree == false || ((ExpressionTree)expr)?.Result is IStatement == false)
{
if (expr != null)
{
parseInfo.Script.Diagnostics.Error("Expressions can't be used as statements.", DocRange.GetRange(statementContext));
}
return(null);
}
else
{
return((ExpressionTree)expr);
}
}
case DeltinScriptParser.S_ifContext s_if: return(new IfAction(parseInfo, scope, s_if.@if()));
case DeltinScriptParser.S_whileContext s_while: return(new WhileAction(parseInfo, scope, s_while.@while()));
case DeltinScriptParser.S_forContext s_for: return(new ForAction(parseInfo, scope, s_for.@for()));
case DeltinScriptParser.S_for_autoContext s_forAuto: return(new AutoForAction(parseInfo, scope, s_forAuto.for_auto()));
case DeltinScriptParser.S_foreachContext s_foreach: return(new ForeachAction(parseInfo, scope, s_foreach.@foreach()));
case DeltinScriptParser.S_returnContext s_return: return(new ReturnAction(parseInfo, scope, s_return.@return()));
case DeltinScriptParser.S_deleteContext s_delete: return(new DeleteAction(parseInfo, scope, s_delete.delete()));
case DeltinScriptParser.S_continueContext s_continue: return(new ContinueAction(parseInfo, DocRange.GetRange(s_continue)));
case DeltinScriptParser.S_breakContext s_break: return(new BreakAction(parseInfo, DocRange.GetRange(s_break)));
case DeltinScriptParser.S_switchContext s_switch: return(new SwitchAction(parseInfo, scope, s_switch.@switch()));
case DeltinScriptParser.S_blockContext s_block: return(new BlockAction(parseInfo, scope, s_block));
default: return(null);
}
}
public override object VisitStatement(DeltinScriptParser.StatementContext context)
{
if (context.GetChild(0) is DeltinScriptParser.MethodContext &&
context.ChildCount == 1)
{
_diagnostics.Add(new Diagnostic("Expected ';'", Range.GetRange(context))
{
severity = Diagnostic.Error
});
}
return(base.VisitStatement(context));
}
public override Node VisitStatement(DeltinScriptParser.StatementContext context)
{
Node node = null;
if (node == null)
{
return(Visit(context.GetChild(0)));
}
else
{
return(node);
}
}
public override object VisitStatement(DeltinScriptParser.StatementContext context)
{
switch (context.GetChild(0))
{
case DeltinScriptParser.MethodContext _:
case DeltinScriptParser.DefineContext _:
case DeltinScriptParser.VarsetContext _:
case DeltinScriptParser.ExprContext _:
if (context.ChildCount == 1)
{
_diagnostics.Error("Expected ';'", new Location(_file, Range.GetRange(context).end.ToRange()));
}
break;
}
return(base.VisitStatement(context));
}
public static IStatement GetStatement(ParseInfo parseInfo, Scope scope, DeltinScriptParser.StatementContext statementContext)
{
switch (statementContext)
{
case DeltinScriptParser.S_defineContext define: {
var newVar = Var.CreateVarFromContext(VariableDefineType.Scoped, parseInfo, define.define());
newVar.Finalize(scope);
return(new DefineAction(newVar));
}
case DeltinScriptParser.S_methodContext method: return(new CallMethodAction(parseInfo, scope, method.method(), false, scope));
case DeltinScriptParser.S_varsetContext varset: return(new SetVariableAction(parseInfo, scope, varset.varset()));
case DeltinScriptParser.S_exprContext s_expr: {
var expr = GetExpression(parseInfo, scope, s_expr.expr(), true, false);
if (expr is ExpressionTree == false || ((ExpressionTree)expr)?.Result is IStatement == false)
{
if (expr != null)
{
parseInfo.Script.Diagnostics.Error("Expressions can't be used as statements.", DocRange.GetRange(statementContext));
}
return(null);
}
else
{
return((ExpressionTree)expr);
}
}
case DeltinScriptParser.S_ifContext s_if: return(new IfAction(parseInfo, scope, s_if.@if()));
case DeltinScriptParser.S_whileContext s_while: return(new WhileAction(parseInfo, scope, s_while.@while()));
case DeltinScriptParser.S_forContext s_for: return(new ForAction(parseInfo, scope, s_for.@for()));
case DeltinScriptParser.S_foreachContext s_foreach: return(new ForeachAction(parseInfo, scope, s_foreach.@foreach()));
case DeltinScriptParser.S_returnContext s_return: return(new ReturnAction(parseInfo, scope, s_return.@return()));
case DeltinScriptParser.S_deleteContext s_delete: return(new DeleteAction(parseInfo, scope, s_delete.delete()));
default: return(null);
}
}
void ParseStatement(DeltinScriptParser.StatementContext statementContext)
{
#region Method
if (statementContext.GetChild(0) is DeltinScriptParser.MethodContext)
{
Actions.Add(ParseMethod(statementContext.GetChild(0) as DeltinScriptParser.MethodContext, false));
return;
}
#endregion
#region Variable set
if (statementContext.STATEMENT_OPERATION() != null)
{
DefinedVar variable;
Element target;
Element index = null;
string operation = statementContext.STATEMENT_OPERATION().GetText();
Element value;
value = ParseExpression(statementContext.expr(1) as DeltinScriptParser.ExprContext);
/* Format if the variable has an expression beforehand (sets the target player)
* expr(0) .ChildCount
* v v
* Statement ( v v ) | Operation | Set to variable
* Variable to set ( v )
* ^ expr | . | expr
* ^ ^
* expr(0) .GetChild(1) == '.' */
if (statementContext.expr(0).ChildCount == 3 &&
statementContext.expr(0).GetChild(1).GetText() == ".")
{
/* Get Variable: .expr(0) .expr(1)
* v v .expr(1) (if the value to be set is an array)
* Statement ( v v v ) | Operation | Set to variable
* Variable to set ( v v )
* ^ expr | . | expr | []
* ^ ^
* Get Target: .expr(0) .expr(0) */
variable = DefinedVar.GetVar(statementContext.expr(0).expr(1).GetChild(0).GetText(),
statementContext.expr(0).expr(1).start);
target = ParseExpression(statementContext.expr(0).expr(0));
// Get the index if the variable has []
var indexExpression = statementContext.expr(0).expr(1).expr(1);
if (indexExpression != null)
{
index = ParseExpression(indexExpression);
}
}
else
{
/* .expr(0) .expr(1)
* v v
* Statement ( v v ) | Operation | Set to variable
* Variable to set (expr) | []
*/
variable = DefinedVar.GetVar(statementContext.expr(0).GetChild(0).GetText(),
statementContext.expr(0).start);
target = new V_EventPlayer();
// Get the index if the variable has []
var indexExpression = statementContext.expr(0).expr(1);
if (indexExpression != null)
{
index = ParseExpression(indexExpression);
}
}
switch (operation)
{
case "+=":
value = Element.Part <V_Add>(variable.GetVariable(target, index), value);
break;
case "-=":
value = Element.Part <V_Subtract>(variable.GetVariable(target, index), value);
break;
case "*=":
value = Element.Part <V_Multiply>(variable.GetVariable(target, index), value);
break;
case "/=":
value = Element.Part <V_Divide>(variable.GetVariable(target, index), value);
break;
case "^=":
value = Element.Part <V_RaiseToPower>(variable.GetVariable(target, index), value);
break;
case "%=":
value = Element.Part <V_Modulo>(variable.GetVariable(target, index), value);
break;
}
Actions.Add(variable.SetVariable(value, target, index));
return;
}
#endregion
#region for
if (statementContext.GetChild(0) is DeltinScriptParser.ForContext)
{
/*
* CreateInitialSkip = true;
*
* if (SkipCountIndex == -1)
* SkipCountIndex = Assign();
*/
// The action the for loop starts on.
// +1 for the counter reset.
int forActionStartIndex = Actions.Count() + 1;
// The target array in the for statement.
Element forArrayElement = ParseExpression(statementContext.@for().expr());
// Use skipIndex with Get/SetIVarAtIndex to get the bool to determine if the loop is running.
Var isBoolRunningSkipIf = Var.AssignVar(IsGlobal);
// Insert the SkipIf at the start of the rule.
Actions.Insert(0,
Element.Part <A_SkipIf>
(
// Condition
isBoolRunningSkipIf.GetVariable(),
// Number of actions
new V_Number(forActionStartIndex)
)
);
// Create the for's temporary variable.
DefinedVar forTempVar = Var.AssignDefinedVar(
name: statementContext.@for().PART().GetText(),
isGlobal: IsGlobal,
token: statementContext.@for().start
);
// Reset the counter.
Actions.Add(forTempVar.SetVariable(new V_Number(0)));
// Parse the for's block.
ParseBlock(statementContext.@for().block());
// Take the variable out of scope.
forTempVar.OutOfScope();
// Add the for's finishing elements
//Actions.Add(SetIVarAtIndex(skipIndex, new V_Number(forActionStartIndex))); // Sets how many variables to skip in the next iteraction.
Actions.Add(isBoolRunningSkipIf.SetVariable(new V_True())); // Enables the skip.
Actions.Add(forTempVar.SetVariable( // Indent the index by 1.
Element.Part <V_Add>
(
forTempVar.GetVariable(),
new V_Number(1)
)
));
Actions.Add(Element.Part <A_Wait>(new V_Number(0.06), WaitBehavior.IgnoreCondition)); // Add the Wait() required by the workshop.
Actions.Add(Element.Part <A_LoopIf>( // Loop if the for condition is still true.
Element.Part <V_Compare>
(
forTempVar.GetVariable(),
Operators.LessThan,
Element.Part <V_CountOf>(forArrayElement)
)
));
Actions.Add(isBoolRunningSkipIf.SetVariable(new V_False()));
return;
}
#endregion
#region if
if (statementContext.GetChild(0) is DeltinScriptParser.IfContext)
{
/*
* Syntax after parse:
*
* If:
* Skip If (Not (expr))
* (body)
* Skip - Only if there is if-else or else statements.
* Else if:
* Skip If (Not (expr))
* (body)
* Skip - Only if there is more if-else or else statements.
* Else:
* (body)
*
*/
// Add dummy action, create after body is created.
int skipIfIndex = Actions.Count();
Actions.Add(null);
// Parse the if body.
ParseBlock(statementContext.@if().block());
// Determines if the "Skip" action after the if block will be created.
// Only if there is if-else or else statements.
bool addIfSkip = statementContext.@if().else_if().Count() > 0 || statementContext.@if().@else() != null;
// Create the inital "SkipIf" action now that we know how long the if's body is.
// Add one to the body length if a Skip action is going to be added.
Actions.RemoveAt(skipIfIndex);
Actions.Insert(skipIfIndex, Element.Part <A_SkipIf>(Element.Part <V_Not>(ParseExpression(statementContext.@if().expr())), new V_Number(Actions.Count - skipIfIndex + (addIfSkip ? 1 : 0))));
// Create the "Skip" dummy action.
int skipIndex = -1;
if (addIfSkip)
{
skipIndex = Actions.Count();
Actions.Add(null);
}
// Parse else-ifs
var skipIfContext = statementContext.@if().else_if();
int[] skipIfData = new int[skipIfContext.Length]; // The index where the else if's "Skip" action is.
for (int i = 0; i < skipIfContext.Length; i++)
{
// Create the dummy action.
int skipIfElseIndex = Actions.Count();
Actions.Add(null);
// Parse the else-if body.
ParseBlock(skipIfContext[i].block());
// Determines if the "Skip" action after the else-if block will be created.
// Only if there is additional if-else or else statements.
bool addIfElseSkip = i < skipIfContext.Length - 1 || statementContext.@if().@else() != null;
// Create the "Skip If" action.
Actions.RemoveAt(skipIfElseIndex);
Actions.Insert(skipIfElseIndex, Element.Part <A_SkipIf>(Element.Part <V_Not>(ParseExpression(skipIfContext[i].expr())), new V_Number(Actions.Count - skipIfElseIndex + (addIfElseSkip ? 1 : 0))));
// Create the "Skip" dummy action.
if (addIfElseSkip)
{
skipIfData[i] = Actions.Count();
Actions.Add(null);
}
}
// Parse else body.
if (statementContext.@if().@else() != null)
{
ParseBlock(statementContext.@if().@else().block());
}
// Replace dummy skip with real skip now that we know the length of the if, if-else, and else's bodies.
// Replace if's dummy.
if (skipIndex != -1)
{
Actions.RemoveAt(skipIndex);
Actions.Insert(skipIndex, Element.Part <A_Skip>(new V_Number(Actions.Count - skipIndex)));
}
// Replace else-if's dummy.
for (int i = 0; i < skipIfData.Length; i++)
{
if (skipIfData[i] != 0)
{
Actions.RemoveAt(skipIfData[i]);
Actions.Insert(skipIfData[i], Element.Part <A_Skip>(new V_Number(Actions.Count - skipIfData[i])));
}
}
return;
}
#endregion
throw new Exception($"What's a {statementContext.GetChild(0)} ({statementContext.GetChild(0).GetType()})?");
}
