Roslyn C#为to语句重建不正确的表达式
我对语句的重建有问题。我想重建片段代码:Roslyn C#为to语句重建不正确的表达式,c#,for-loop,roslyn,C#,For Loop,Roslyn,我对语句的重建有问题。我想重建片段代码: FOR(j, variable or integer, integer, > or < or <= or >=, - or +); 您不需要将ArgumentListSyntax中的元素与文本或标识符分开,因为您实际上有一个支持调用的正式结构:FOR(j,variable | integer,variable | integer,>| for(var j = variable or integer; j > or <
FOR(j, variable or integer, integer, > or < or <= or >=, - or +);
您不需要将
ArgumentListSyntax
中的元素与文本或标识符分开,因为您实际上有一个支持调用的正式结构:FOR(j,variable | integer,variable | integer,>|
for(var j = variable or integer; j > or < or >= or <= 15; j-- or j++){}
public override SyntaxNode VisitInvocationExpression(InvocationExpressionSyntax node)
{
// FOR(j, k, 10, >, -);
if (node.Kind() == SyntaxKind.InvocationExpression)
{
InvocationExpressionSyntax invocationExpression = node;
if (invocationExpression.GetFirstToken().ToString() == "FOR")
{
//List<ArgumentSyntax> argumentList = new List<ArgumentSyntax>();
//List<IdentifierNameSyntax> test = new List<IdentifierNameSyntax>();
var tmp = node.ChildNodes().OfType<ArgumentListSyntax>().FirstOrDefault();
var tmp1 = tmp.ChildNodes().OfType<ArgumentSyntax>().FirstOrDefault();
var tmp2 = tmp1.ChildNodes().OfType<IdentifierNameSyntax>().FirstOrDefault();
var tmp3 = tmp.Arguments.ElementAt(1);
var tmp4 = tmp3.ChildNodes().OfType<IdentifierNameSyntax>().FirstOrDefault();
Console.WriteLine(tmp.Arguments.ElementAt(0));
Console.WriteLine(tmp.Arguments);
Console.WriteLine(tmp2.GetFirstToken());
Console.WriteLine(tmp4);
node = node.ReplaceNode(node, SyntaxFactory.ForStatement(SyntaxKind.ForKeyword, SyntaxKind.OpenParenToken,
SyntaxFactory.VariableDeclaration(SyntaxFactory.IdentifierName("var"), )));
}
}
return base.VisitInvocationExpression(node);
}
...
// FOR(j, variable | integer, variable | integer, > | < | <= | >=, - | +);
if (node.Expression is IdentifierNameSyntax identifier && identifier.Identifier.ValueText.Equals("FOR"))
{
var arguments = node.ArgumentList.Arguments;
if (arguments.Count != 5) return node;
var second = arguments[1].Expression;
switch (second)
{
case IdentifierNameSyntax variable:
// and some sepcific logic for identifier
break;
case LiteralExpressionSyntax literal when literal.Kind() == SyntaxKind.NumericLiteralExpression:
// and some sepcific logic for literals and check,
// that the input literal is integer and is not rational value
break;
default:
// current argument isn't literal or identifier you can not do anything
return node;
}
// do the similar check for the other arguments
// and replace node as you wish
...
}
...
// the same code from the example above
// here you can use an another logic to retrieve expression that you want
var second = arguments.First(x => x.IsKind(SyntaxKind.NumericLiteralExpression) || x.IsKind(SyntaxKind.IdentifierName)).Expression;
switch (second)
{
// the same code from the example above
}
// the same code from the example above
...
}