Assigning exprtk variables as vector members
I asked very specific question here but I realized where the problem is and it's slightly more general.
Seeing ALL exprtk examples and code pieces, everyone uses exprtk's basic metod add_variable as
double variab;
exprtk::symbol_table<double> my_symbol_table;
my_symbol_table.add_variable("name_of_variable", variab);
and never as
std::vector<double> variab{0.};
exprtk::symbol_table<double> my_symbol_table;
my_symbol_table.add_variable("name_of_variable", variab[0]);
Is there a reason? I cannot find anything on exprtk's readme.txt, it is just never mentioned, they switch immediately on adding a vector in the string expression corresponding to a c++ vector, which is not the case I want.
In my case I have several variables on the string with a random name and I want to match them on double variables inside a container . The example in the question linked seems to suggest that this doesn't work.
Any ideas?
c++ vector exprtk
edited Dec 1 '18 at 10:47
Cœur
18.2k9108148
asked Nov 26 '18 at 10:13
BagnarolBagnarol
14
add a comment |
I asked very specific question here but I realized where the problem is and it's slightly more general.
Seeing ALL exprtk examples and code pieces, everyone uses exprtk's basic metod add_variable as
double variab;
exprtk::symbol_table<double> my_symbol_table;
my_symbol_table.add_variable("name_of_variable", variab);
and never as
std::vector<double> variab{0.};
exprtk::symbol_table<double> my_symbol_table;
my_symbol_table.add_variable("name_of_variable", variab[0]);
Is there a reason? I cannot find anything on exprtk's readme.txt, it is just never mentioned, they switch immediately on adding a vector in the string expression corresponding to a c++ vector, which is not the case I want.
In my case I have several variables on the string with a random name and I want to match them on double variables inside a container . The example in the question linked seems to suggest that this doesn't work.
Any ideas?
c++ vector exprtk
edited Dec 1 '18 at 10:47
Cœur
18.2k9108148
asked Nov 26 '18 at 10:13
BagnarolBagnarol
14
my_symbol_table.add_variable("name_of_variable", variab[0]);seems correct. Care to not resize vector, invalidating pointer.
– Jarod42
Nov 26 '18 at 10:22
You got it, that was exactly the problem. Thanks a lot, ten points to Gryffindor.
– Bagnarol
Nov 26 '18 at 22:10
add a comment |
I asked very specific question here but I realized where the problem is and it's slightly more general.
Seeing ALL exprtk examples and code pieces, everyone uses exprtk's basic metod add_variable as
double variab;
exprtk::symbol_table<double> my_symbol_table;
my_symbol_table.add_variable("name_of_variable", variab);
and never as
std::vector<double> variab{0.};
exprtk::symbol_table<double> my_symbol_table;
my_symbol_table.add_variable("name_of_variable", variab[0]);
Is there a reason? I cannot find anything on exprtk's readme.txt, it is just never mentioned, they switch immediately on adding a vector in the string expression corresponding to a c++ vector, which is not the case I want.
In my case I have several variables on the string with a random name and I want to match them on double variables inside a container . The example in the question linked seems to suggest that this doesn't work.
Any ideas?
c++ vector exprtk
edited Dec 1 '18 at 10:47
Cœur
18.2k9108148
asked Nov 26 '18 at 10:13
BagnarolBagnarol
14
I asked very specific question here but I realized where the problem is and it's slightly more general.
Seeing ALL exprtk examples and code pieces, everyone uses exprtk's basic metod add_variable as
double variab;
exprtk::symbol_table<double> my_symbol_table;
my_symbol_table.add_variable("name_of_variable", variab);
and never as
std::vector<double> variab{0.};
exprtk::symbol_table<double> my_symbol_table;
my_symbol_table.add_variable("name_of_variable", variab[0]);
Is there a reason? I cannot find anything on exprtk's readme.txt, it is just never mentioned, they switch immediately on adding a vector in the string expression corresponding to a c++ vector, which is not the case I want.
In my case I have several variables on the string with a random name and I want to match them on double variables inside a container . The example in the question linked seems to suggest that this doesn't work.
Any ideas?
c++ vector exprtk
c++ vector exprtk
edited Dec 1 '18 at 10:47
Cœur
18.2k9108148
asked Nov 26 '18 at 10:13
BagnarolBagnarol
14
edited Dec 1 '18 at 10:47
Cœur
18.2k9108148
asked Nov 26 '18 at 10:13
BagnarolBagnarol
14
edited Dec 1 '18 at 10:47
Cœur
18.2k9108148
edited Dec 1 '18 at 10:47
Cœur
18.2k9108148
edited Dec 1 '18 at 10:47
Cœur
18.2k9108148
18.2k9108148
asked Nov 26 '18 at 10:13
BagnarolBagnarol
14
asked Nov 26 '18 at 10:13
BagnarolBagnarol
14
asked Nov 26 '18 at 10:13
BagnarolBagnarol
14
14
my_symbol_table.add_variable("name_of_variable", variab[0]);seems correct. Care to not resize vector, invalidating pointer.
– Jarod42
Nov 26 '18 at 10:22
You got it, that was exactly the problem. Thanks a lot, ten points to Gryffindor.
– Bagnarol
Nov 26 '18 at 22:10
add a comment |
my_symbol_table.add_variable("name_of_variable", variab[0]);seems correct. Care to not resize vector, invalidating pointer.
– Jarod42
Nov 26 '18 at 10:22
You got it, that was exactly the problem. Thanks a lot, ten points to Gryffindor.
– Bagnarol
Nov 26 '18 at 22:10
my_symbol_table.add_variable("name_of_variable", variab[0]); seems correct. Care to not resize vector, invalidating pointer.– Jarod42
Nov 26 '18 at 10:22
my_symbol_table.add_variable("name_of_variable", variab[0]); seems correct. Care to not resize vector, invalidating pointer.– Jarod42
Nov 26 '18 at 10:22
You got it, that was exactly the problem. Thanks a lot, ten points to Gryffindor.
– Bagnarol
Nov 26 '18 at 22:10
You got it, that was exactly the problem. Thanks a lot, ten points to Gryffindor.
– Bagnarol
Nov 26 '18 at 22:10
add a comment |
0
active
oldest
votes
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%2f53478900%2fassigning-exprtk-variables-as-vector-members%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
0
active
oldest
votes
0
active
oldest
votes
active
oldest
votes
active
oldest
votes
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.
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%2f53478900%2fassigning-exprtk-variables-as-vector-members%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
my_symbol_table.add_variable("name_of_variable", variab[0]);seems correct. Care to not resize vector, invalidating pointer.– Jarod42
Nov 26 '18 at 10:22
You got it, that was exactly the problem. Thanks a lot, ten points to Gryffindor.
– Bagnarol
Nov 26 '18 at 22:10