How to find out if a numeric type is signed or unsigned in C#
I want to know details about the type of a field by reflection.
I know I can find out that it is a value type with Type.IsValueType. But from there how do I know it is a number? A fixed point number? Signed or unsigned??
Is there anything like Type.IsSigned?
c# reflection
asked Nov 14 '18 at 12:20
Stefan Bormann
376216
add a comment |
I want to know details about the type of a field by reflection.
I know I can find out that it is a value type with Type.IsValueType. But from there how do I know it is a number? A fixed point number? Signed or unsigned??
Is there anything like Type.IsSigned?
c# reflection
asked Nov 14 '18 at 12:20
Stefan Bormann
376216
2
What do you mean by "unknown"? Is itdynamic? Is it anobject? Elaborate please.
– rory.ap
Nov 14 '18 at 12:22
1
You'll have to compare the type with all the CLR's signed types to see if it's one of them.
– Matthew Watson
Nov 14 '18 at 12:23
1
You probably do something like 1if typeof(myVar) == typeof(int)), orif (myvar is ulong)`...
– ATC
Nov 14 '18 at 12:23
@rory.ap: the algorithm does not know which class it will be working on, therefore I must use reflection - I rephrased out that "unknown"
– Stefan Bormann
Nov 14 '18 at 12:36
add a comment |
I want to know details about the type of a field by reflection.
I know I can find out that it is a value type with Type.IsValueType. But from there how do I know it is a number? A fixed point number? Signed or unsigned??
Is there anything like Type.IsSigned?
c# reflection
asked Nov 14 '18 at 12:20
Stefan Bormann
376216
I want to know details about the type of a field by reflection.
I know I can find out that it is a value type with Type.IsValueType. But from there how do I know it is a number? A fixed point number? Signed or unsigned??
Is there anything like Type.IsSigned?
c# reflection
c# reflection
asked Nov 14 '18 at 12:20
Stefan Bormann
376216
asked Nov 14 '18 at 12:20
Stefan Bormann
376216
edited Nov 14 '18 at 12:34
asked Nov 14 '18 at 12:20
Stefan Bormann
376216
asked Nov 14 '18 at 12:20
Stefan Bormann
376216
asked Nov 14 '18 at 12:20
Stefan Bormann
376216
376216
2
What do you mean by "unknown"? Is itdynamic? Is it anobject? Elaborate please.
– rory.ap
Nov 14 '18 at 12:22
1
You'll have to compare the type with all the CLR's signed types to see if it's one of them.
– Matthew Watson
Nov 14 '18 at 12:23
1
You probably do something like 1if typeof(myVar) == typeof(int)), orif (myvar is ulong)`...
– ATC
Nov 14 '18 at 12:23
@rory.ap: the algorithm does not know which class it will be working on, therefore I must use reflection - I rephrased out that "unknown"
– Stefan Bormann
Nov 14 '18 at 12:36
add a comment |
2
What do you mean by "unknown"? Is itdynamic? Is it anobject? Elaborate please.
– rory.ap
Nov 14 '18 at 12:22
1
You'll have to compare the type with all the CLR's signed types to see if it's one of them.
– Matthew Watson
Nov 14 '18 at 12:23
1
You probably do something like 1if typeof(myVar) == typeof(int)), orif (myvar is ulong)`...
– ATC
Nov 14 '18 at 12:23
@rory.ap: the algorithm does not know which class it will be working on, therefore I must use reflection - I rephrased out that "unknown"
– Stefan Bormann
Nov 14 '18 at 12:36
2
2
What do you mean by "unknown"? Is it
dynamic? Is it an object? Elaborate please.– rory.ap
Nov 14 '18 at 12:22
What do you mean by "unknown"? Is it
dynamic? Is it an object? Elaborate please.– rory.ap
Nov 14 '18 at 12:22
1
1
You'll have to compare the type with all the CLR's signed types to see if it's one of them.
– Matthew Watson
Nov 14 '18 at 12:23
You'll have to compare the type with all the CLR's signed types to see if it's one of them.
– Matthew Watson
Nov 14 '18 at 12:23
1
1
You probably do something like 1if typeof(myVar) == typeof(int))
, or if (myvar is ulong)`...– ATC
Nov 14 '18 at 12:23
You probably do something like 1if typeof(myVar) == typeof(int))
, or if (myvar is ulong)`...– ATC
Nov 14 '18 at 12:23
@rory.ap: the algorithm does not know which class it will be working on, therefore I must use reflection - I rephrased out that "unknown"
– Stefan Bormann
Nov 14 '18 at 12:36
@rory.ap: the algorithm does not know which class it will be working on, therefore I must use reflection - I rephrased out that "unknown"
– Stefan Bormann
Nov 14 '18 at 12:36
add a comment |
1 Answer
1
active
oldest
votes
There aren't that many numeric types that are unsigned, so why not compose a list of that:
if (new Type { typeof(ushort), typeof(uint), typeof(ulong), typeof(byte) }.Contains(type))
{
// unsigned.
}
Or if you just want to compare the value (here o):
if (o is ushort || o is uint || o is ulong || o is byte)
{
// unsigned.
}
answered Nov 14 '18 at 12:23
Patrick Hofman
126k18170224
Well, thanks. That explicit list of types was my first thought, just hoped there would be a more elegant solution...
– Stefan Bormann
Nov 14 '18 at 12:40
add a comment |
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53300136%2fhow-to-find-out-if-a-numeric-type-is-signed-or-unsigned-in-c-sharp%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
There aren't that many numeric types that are unsigned, so why not compose a list of that:
if (new Type { typeof(ushort), typeof(uint), typeof(ulong), typeof(byte) }.Contains(type))
{
// unsigned.
}
Or if you just want to compare the value (here o):
if (o is ushort || o is uint || o is ulong || o is byte)
{
// unsigned.
}
answered Nov 14 '18 at 12:23
Patrick Hofman
126k18170224
Well, thanks. That explicit list of types was my first thought, just hoped there would be a more elegant solution...
– Stefan Bormann
Nov 14 '18 at 12:40
add a comment |
There aren't that many numeric types that are unsigned, so why not compose a list of that:
if (new Type { typeof(ushort), typeof(uint), typeof(ulong), typeof(byte) }.Contains(type))
{
// unsigned.
}
Or if you just want to compare the value (here o):
if (o is ushort || o is uint || o is ulong || o is byte)
{
// unsigned.
}
answered Nov 14 '18 at 12:23
Patrick Hofman
126k18170224
Well, thanks. That explicit list of types was my first thought, just hoped there would be a more elegant solution...
– Stefan Bormann
Nov 14 '18 at 12:40
add a comment |
There aren't that many numeric types that are unsigned, so why not compose a list of that:
if (new Type { typeof(ushort), typeof(uint), typeof(ulong), typeof(byte) }.Contains(type))
{
// unsigned.
}
Or if you just want to compare the value (here o):
if (o is ushort || o is uint || o is ulong || o is byte)
{
// unsigned.
}
answered Nov 14 '18 at 12:23
Patrick Hofman
126k18170224
There aren't that many numeric types that are unsigned, so why not compose a list of that:
if (new Type { typeof(ushort), typeof(uint), typeof(ulong), typeof(byte) }.Contains(type))
{
// unsigned.
}
Or if you just want to compare the value (here o):
if (o is ushort || o is uint || o is ulong || o is byte)
{
// unsigned.
}
answered Nov 14 '18 at 12:23
Patrick Hofman
126k18170224
edited Nov 14 '18 at 12:24
answered Nov 14 '18 at 12:23
Patrick Hofman
126k18170224
answered Nov 14 '18 at 12:23
Patrick Hofman
126k18170224
answered Nov 14 '18 at 12:23
Patrick Hofman
126k18170224
126k18170224
Well, thanks. That explicit list of types was my first thought, just hoped there would be a more elegant solution...
– Stefan Bormann
Nov 14 '18 at 12:40
add a comment |
Well, thanks. That explicit list of types was my first thought, just hoped there would be a more elegant solution...
– Stefan Bormann
Nov 14 '18 at 12:40
Well, thanks. That explicit list of types was my first thought, just hoped there would be a more elegant solution...
– Stefan Bormann
Nov 14 '18 at 12:40
Well, thanks. That explicit list of types was my first thought, just hoped there would be a more elegant solution...
– Stefan Bormann
Nov 14 '18 at 12:40
add a comment |
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Some of your past answers have not been well-received, and you're in danger of being blocked from answering.
Please pay close attention to the following guidance:
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53300136%2fhow-to-find-out-if-a-numeric-type-is-signed-or-unsigned-in-c-sharp%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
2
What do you mean by "unknown"? Is it
dynamic? Is it anobject? Elaborate please.– rory.ap
Nov 14 '18 at 12:22
1
You'll have to compare the type with all the CLR's signed types to see if it's one of them.
– Matthew Watson
Nov 14 '18 at 12:23
1
You probably do something like 1if typeof(myVar) == typeof(int))
, orif (myvar is ulong)`...– ATC
Nov 14 '18 at 12:23
@rory.ap: the algorithm does not know which class it will be working on, therefore I must use reflection - I rephrased out that "unknown"
– Stefan Bormann
Nov 14 '18 at 12:36