public void VisitFunctionDefinition(FunctionDefinition functionDefinition)
{
if (_functionContext != null)
{
_context.Error(
functionDefinition.Identifier.Span,
"cannot define a function inside o`f another function");
}
if (functionDefinition.Identifier.Lexeme == "main")
{
_astContext.AddMangledName(functionDefinition.NodeId, "wire_main__");
}
var(parameterTypes, allParamsOk) = GetFunctionParameterTypes(functionDefinition);
if (!allParamsOk)
{
return;
}
var returnType = GetFunctionReturnType(functionDefinition);
if (returnType != null)
{
var functionType = new FunctionType(parameterTypes, returnType);
_astContext.AddNodeType(functionDefinition.NodeId, functionType);
var wasRedefined = !_currentScope.DefineSymbol(functionDefinition, functionType);
if (wasRedefined)
{
_context.Error(
functionDefinition.Identifier.Span,
$"redefinition of function \"{functionDefinition.Identifier}\"");
}
}
_functionContext = functionDefinition;
_currentScope = new Scope(_currentScope);
foreach (var parameter in functionDefinition.Parameters)
{
var parameterType = _astContext.GetNodeType(parameter.Node.NodeId);
_currentScope.DefineSymbol(parameter.Node, parameterType);
}
AnalyzeBlock(functionDefinition.Body);
_currentScope = _currentScope.Outer;
_functionContext = null;
}
