/// <summary>
/// 函数参数定义
/// </summary>
/// <param name="node"></param>
public void Visit(ParameterDeclarationNode node)
{
var builder = new StringBuilder();
builder.Append("函数参数：");
builder.AppendFormat("{0} {1}", node.Type, node.Name);
Console.Write(builder.ToString());
}
protected override List <AssemblyElement> VisitParameterDeclaration(ParameterDeclarationNode node)
{
return(new List <AssemblyElement>
{
GetParameterPush(node.Symbol),
GetAssignInstruction(node.Symbol),
});
}
protected override List <AssemblyElement> VisitFunctionDefinition(FunctionDefinitionNode node)
{
List <AssemblyElement> instructions = ((BlockSymbol)node.Symbol).Instructions;
if (node.IsExternal)
{
return(instructions);
}
for (int i = node.ParameterNodes.Count - 1; i >= 0; i--)
{
ParameterDeclarationNode parameterNode = node.ParameterNodes[i];
instructions.AddRange(Visit(parameterNode));
}
foreach (StatementNode bodyNode in node.BodyNodes)
{
instructions.AddRange(Visit(bodyNode));
}
instructions.Add(new Ret());
return(instructions);
}
public Type Visit(ParameterDeclarationNode node)
{
foreach (var typeNode in node)
{
Type type = Visit((dynamic)typeNode);
int pos = 0;
foreach (var idNode in typeNode)
{
var varName = idNode.AnchorToken.Lexeme;
if (CurrentScopeHasSymbol(varName))
{
throw new SemanticError($"Duplicated parameter: {varName}",
idNode.AnchorToken);
}
else
{
AddSymbolToScope(varName, type, Kind.PARAM, pos: pos++, value: type.DefaultValue());
}
}
}
return(Type.VOID);
}
public void Visit(ParameterDeclarationNode node)
{
// do nothing
}
internal override void Visit(ParameterDeclarationNode node)
{
}
