/// <summary>
/// Parse simple RHS expression
/// </summary>
/// <param name="expression"></param>
/// <param name="core"></param>
/// <returns></returns>
public static ProtoCore.AST.AssociativeAST.AssociativeNode ParseRHSExpression(string expression, ProtoCore.Core core)
{
if (string.IsNullOrEmpty(expression))
{
throw new ArgumentException("expression");
}
if (core == null)
{
throw new ArgumentException("core");
}
var currentParsingMode = core.ParsingMode;
var currentParsingFlag = core.IsParsingCodeBlockNode;
core.ParsingMode = ProtoCore.ParseMode.AllowNonAssignment;
core.IsParsingCodeBlockNode = true;
ProtoCore.AST.Node astNode = null;
try
{
expression = expression.Trim();
if (!expression.EndsWith(";"))
{
expression += ";";
}
expression = "__dummy = " + expression;
astNode = ParserUtils.ParseWithCore(expression, core);
}
catch (ProtoCore.BuildHaltException ex)
{
}
core.ParsingMode = currentParsingMode;
core.IsParsingCodeBlockNode = currentParsingFlag;
if (astNode == null)
{
return(null);
}
var cbn = astNode as ProtoCore.AST.AssociativeAST.CodeBlockNode;
if (cbn != null && cbn.Body.Any())
{
var expr = cbn.Body[0] as ProtoCore.AST.AssociativeAST.BinaryExpressionNode;
if (expr != null)
{
return(expr.RightNode);
}
}
return(null);
}
private static void ParseUserCodeCore(Core core, string expression, out List <AssociativeNode> astNodes, out List <AssociativeNode> commentNodes)
{
astNodes = new List <AssociativeNode>();
core.ResetForPrecompilation();
core.IsParsingCodeBlockNode = true;
core.ParsingMode = ParseMode.AllowNonAssignment;
ParseResult parseResult = ParserUtils.ParseWithCore(expression, core);
commentNodes = ParserUtils.GetAstNodes(parseResult.CommentBlockNode);
var nodes = ParserUtils.GetAstNodes(parseResult.CodeBlockNode);
Validity.Assert(nodes != null);
int index = 0;
int typedIdentIndex = 0;
foreach (var node in nodes)
{
var n = node as AssociativeNode;
Validity.Assert(n != null);
// Append the temporaries only if it is not a function def or class decl
bool isFunctionOrClassDef = n is FunctionDefinitionNode;
if (n is ImportNode)
{
core.BuildStatus.LogSemanticError(Resources.ImportStatementNotSupported);
}
else if (n is ClassDeclNode)
{
core.BuildStatus.LogSemanticError(Resources.ClassDeclarationNotSupported);
}
else if (isFunctionOrClassDef)
{
// Add node as it is
astNodes.Add(node);
}
else
{
// Handle temporary naming for temporary Binary exp. nodes and non-assignment nodes
var ben = node as BinaryExpressionNode;
if (ben != null && ben.Optr == Operator.assign)
{
var lNode = ben.LeftNode as IdentifierNode;
if (lNode != null && lNode.Value == Constants.kTempProcLeftVar)
{
string name = Constants.kTempVarForNonAssignment + index;
var newNode = new BinaryExpressionNode(new IdentifierNode(name), ben.RightNode);
astNodes.Add(newNode);
index++;
}
else
{
// Add node as it is
astNodes.Add(node);
index++;
}
}
else
{
if (node is TypedIdentifierNode)
{
// e.g. a : int = %tTypedIdent_<Index>;
var ident = new IdentifierNode(Constants.kTempVarForTypedIdentifier + typedIdentIndex);
NodeUtils.CopyNodeLocation(ident, node);
var typedNode = new BinaryExpressionNode(node as TypedIdentifierNode, ident, Operator.assign);
NodeUtils.CopyNodeLocation(typedNode, node);
astNodes.Add(typedNode);
typedIdentIndex++;
}
else
{
string name = Constants.kTempVarForNonAssignment + index;
var newNode = new BinaryExpressionNode(new IdentifierNode(name), n);
astNodes.Add(newNode);
index++;
}
}
}
}
}