private void WaddleDeclStmt(DeclStmtSyntax declStmt)
{
if (_currentFunction == null)
{
throw new SemanticErrorException($"can not use declare statement outside of function.");
}
if (_currentFunction?.Variables.ContainsKey(declStmt.ParameterDeclSyntax.Name) == false)
{
throw new SemanticErrorException($"{declStmt.ParameterDeclSyntax.Name} is not an available variable at this position.");
}
var variable = _currentFunction?.Variables[declStmt.ParameterDeclSyntax.Name] !;
var exprType = WaddleExpression(declStmt.Expression);
if (IsAssignableFrom(variable.Type !, exprType) == false)
{
throw new SemanticErrorException($"type {variable.Type} is not assignable from {exprType}.");
}
}
public bool EnterDeclStmt(DeclStmtSyntax declStmt, WaddleContext ctx)
{
if (_currentFunction == null)
{
throw new SemanticErrorException($"can not use declare statement outside of function.");
}
if (_currentFunction?.Variables.ContainsKey(declStmt.ParameterDeclSyntax.Name) == false)
{
throw new SemanticErrorException($"{declStmt.ParameterDeclSyntax.Name} is not an available variable at this position.");
}
var variable = _currentFunction?.Variables[declStmt.ParameterDeclSyntax.Name] !;
var exprType = declStmt.Expression.Accept(TypeVisitor);
if (variable.Type != exprType)
{
throw new SemanticErrorException($"type {variable.Type} is not assignable from {exprType}.");
}
return(true);
}
public virtual TResult Visit(DeclStmtSyntax syntax)
{
return(DefaultResult);
}
public void LeaveDeclStmt(DeclStmtSyntax declStmt, WaddleContext ctx)
{
}
