Static Assertion Failed Signal And Slot Arguments Are Not Compatible

11-05-2021
 |  [RAND-100] - Comments

Apr 23, 2015 @Daniel-Eckert since I can't reproduce this on any machine here and also not on our continuous integration server (running Ubuntu 14.04 and OSX) I need more information: what is the platform you build on including the version of ROS. Qt C: static assertion failed: Signal and slot arguments are not compatible 2017-07-27 10:59:38 1 回复 0 I am trying to start a countdown timer in a workerthread when the user clicks a pushbutton.

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C++Static Assertion Failed Signal And Slot Arguments Are Not Compatible

Static Assertion Failed Signal And Slot Arguments Are Not Compatible 2

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Performs compile-time assertion checking

[edit]Syntax

static_assert(bool_constexpr,message)(since C++11)
static_assert(bool_constexpr)(since C++17)

[edit]Explanation

bool_constexpr - a contextually converted constant expression of type bool
message -optional (since C++17)string literal that will appear as compiler error if bool_constexpr is false

A static assert declaration may appear at namespace and block scope (as a block declaration) and inside a class body (as a member declaration)

Static Assertion Failed Signal And Slot Arguments Are Not Compatible Free

If bool_constexpr returns true, this declaration has no effect. Otherwise a compile-time error is issued, and the text of message, if any, is included in the diagnostic message.

message can be omitted.

(since C++17)

Static Assertion Failed Signal And Slot Arguments Are Not Compatible 2

[edit]Note

Slot

Since message has to be a string literal, it cannot contain dynamic information or even a constant expression that is not a string literal itself. In particular, it cannot contain the name of the template type argument.

[edit]Defect reports

Static Assertion Failed Signal And Slot Arguments Are Not Compatible Windows 10

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR Applied to Behavior as published Correct behavior
CWG 2039 C++11 only the expression before conversion is required to be constant the conversion must also be valid in a constant expression

[edit]Example

Possible output:

[edit]See also

C documentation for static_assert

Static Assertion Failed Signal And Slot Arguments Are Not Compatible Windows 10

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