private ITreeContextPart[] Flatten(ScriptFile script, DeltinScriptParser.E_expr_treeContext exprContext)
{
var exprList = new List <ITreeContextPart>();
Flatten(script, exprContext, exprList);
return(exprList.ToArray());
// Recursive flatten function.
void Flatten(ScriptFile script, DeltinScriptParser.E_expr_treeContext exprContext, List <ITreeContextPart> exprList)
{
// If the expression is a Tree, recursively flatten.
if (exprContext.expr() is DeltinScriptParser.E_expr_treeContext)
{
Flatten(script, (DeltinScriptParser.E_expr_treeContext)exprContext.expr(), exprList);
}
// Otherwise, add the expression to the list.
else
{
// Get the function.
if (exprContext.expr() is DeltinScriptParser.E_methodContext method)
{
exprList.Add(new FunctionPart(method.method()));
}
// Get the variable.
else if (exprContext.expr() is DeltinScriptParser.E_variableContext variable)
{
exprList.Add(new VariableOrTypePart(variable.variable()));
}
// Get the expression.
else
{
exprList.Add(new ExpressionPart(exprContext.expr()));
}
}
// Syntax error if there is no method or variable.
if (exprContext.method() == null && exprContext.variable() == null)
{
script.Diagnostics.Error("Expected expression.", DocRange.GetRange(exprContext.SEPERATOR()));
_trailingSeperator = exprContext.SEPERATOR();
}
else
{
// Get the method.
if (exprContext.method() != null)
{
exprList.Add(new FunctionPart(exprContext.method()));
}
// Get the variable.
if (exprContext.variable() != null)
{
exprList.Add(new VariableOrTypePart(exprContext.variable()));
}
}
}
}
public ExpressionTree(ParseInfo parseInfo, Scope scope, DeltinScriptParser.E_expr_treeContext exprContext, bool usedAsValue)
{
ExprContextTree = Flatten(parseInfo.Script, exprContext);
// Setup
for (int i = 0; i < ExprContextTree.Length; i++)
{
ExprContextTree[i].Setup(new TreeContextParseInfo()
{
ParseInfo = i == 0 ? parseInfo : parseInfo.SetSourceExpression(ExprContextTree[i - 1]),
Getter = scope,
Scope = i == 0 ? scope : ExprContextTree[i - 1].GetScope() ?? new Scope(),
Parent = i == 0 ? null : ExprContextTree[i - 1],
UsedAsExpression = usedAsValue || i < ExprContextTree.Length - 1,
IsLast = i == ExprContextTree.Length - 1
});
}
// Get expressions
Tree = new IExpression[ExprContextTree.Length];
IExpression current = ExprContextTree[0].GetExpression();
Tree[0] = current;
if (current != null)
{
for (int i = 1; i < ExprContextTree.Length; i++)
{
current = ExprContextTree[i].GetExpression();
Tree[i] = current;
if (current == null)
{
Completed = false;
break;
}
}
}
else
{
Completed = false;
}
if (Completed)
{
Result = Tree[Tree.Length - 1];
}
// Get the completion items for each expression in the path.
GetCompletion(parseInfo.Script, scope);
}
private TreeContextPart[] Flatten(ScriptFile script, DeltinScriptParser.E_expr_treeContext exprContext)
{
var exprList = new List <TreeContextPart>();
Flatten(script, exprContext, exprList);
return(exprList.ToArray());
void Flatten(ScriptFile script, DeltinScriptParser.E_expr_treeContext exprContext, List <TreeContextPart> exprList)
{
if (exprContext.expr() is DeltinScriptParser.E_expr_treeContext)
{
Flatten(script, (DeltinScriptParser.E_expr_treeContext)exprContext.expr(), exprList);
}
else
{
exprList.Add(new TreeContextPart(exprContext.expr()));
}
if (exprContext.method() == null && exprContext.variable() == null)
{
script.Diagnostics.Error("Expected expression.", DocRange.GetRange(exprContext.SEPERATOR()));
_trailingSeperator = exprContext.SEPERATOR();
}
else
{
if (exprContext.method() != null)
{
exprList.Add(new TreeContextPart(exprContext.method()));
}
if (exprContext.variable() != null)
{
exprList.Add(new TreeContextPart(exprContext.variable()));
}
}
}
}
public ExpressionTree(ParseInfo parseInfo, Scope scope, DeltinScriptParser.E_expr_treeContext exprContext, bool usedAsValue)
{
ExprContextTree = Flatten(parseInfo.Script, exprContext);
Tree = new IExpression[ExprContextTree.Length];
IExpression current = ExprContextTree[0].Parse(parseInfo, scope, scope, true);
Tree[0] = current;
if (current != null)
{
for (int i = 1; i < ExprContextTree.Length; i++)
{
current = ExprContextTree[i].Parse(parseInfo, current.ReturningScope() ?? new Scope(), scope, i < ExprContextTree.Length - 1 || usedAsValue);
Tree[i] = current;
if (current == null)
{
Completed = false;
break;
}
}
}
else
{
Completed = false;
}
if (Completed)
{
Result = Tree[Tree.Length - 1];
}
// Get the completion items for each expression in the path.
GetCompletion(parseInfo.Script, scope);
}
