Compilation error Compilation error or compile error refers to a state when a compiler fails to compile a piece of computer program source code, either due to
Compilation error or compile error refers to a state when a compiler fails to compile a piece of computer program source code, either due to errors in the code, or, more unusually, due to errors in the compiler itself. A compilation error message often helps programmers debugging the source code.
Compilation error or compile error refers to a state when a compiler fails to compile a piece of computer program source code, either due to errors in the code
Compiler Errors. Compiler errors happen when you write Java that's syntactically invalid or features a mismatch in acceptable types. In these cases, Java fails to compile your code and you can't run the most recent version of the program you've written.
Build your code
There are two basic types of build configuration: Debug and Release.
The Debug configuration produces a slower, larger executable that allows for a richer interactive run-time debugging experience.
The Debug executable should never be shipped.
The Release configuration builds a faster, optimized executable that's appropriate to ship (at least from the perspective of the compiler).
The default build configuration is Debug.
Debug your running code
Now that you have successfully built your code and performed a little clean up, run it by pressing F5 or selecting Debug > Start Debugging.
This action starts your app in a debug environment so you can observe its behavior in detail.
The Visual Studio IDE changes while your app is running: the Output window is replaced by two new ones (in the default window configuration), the Autos/Locals/Watch tabbed window and the Call Stack/Breakpoints/Exception Settings/Output tabbed window.
These windows have multiple tabs that allow you to inspect and evaluate your app's variables, threads, call stacks, and other behaviors as it runs.
Review the Error List
Unless you've made no modifications to code you have previously and successfully compiled, you probably have an error.
If you're new to coding, you probably have lots of them.
Errors are sometimes obvious, such as a simple syntax error or incorrect variable name, and sometimes they're difficult to understand, with only a cryptic code to guide you.
For a cleaner view of the issues, navigate to the bottom of the build Output window and select the Error List tab.
This action takes you to a more organized view of the errors and warnings for your project, and gives you some extra options as well.
Run Code Cleanup
Visual Studio provides on-demand formatting of your C# code file, including code style preferences, through the Code Cleanup button at the bottom of the editor.
Run unit tests
Unit tests are your first line of defense against code bugs because, when done correctly, they test a single "unit" of code, typically a single function, and are easier to debug than your full program.
Visual Studio installs the Microsoft unit testing frameworks for both managed and native code.
Use a unit testing framework to create unit tests, run them, and report the results of these tests.
Rerun unit tests when you make changes, to test that your code is still working correctly.
With Visual Studio Enterprise edition, you can run tests automatically after every build.
Use code analysis
C# and Visual Basic code analysis
Use Quick Actions to fix or refactor code
Quick Actions, available from the light bulb or screwdriver icon, let you refactor code inline.
They're an easy way to fix common warnings quickly and effectively in C#, C++, and Visual Basic code.
To access them, right-click on a warning squiggle and select Quick Actions and refactorings.
Or, when your cursor is on the line with the colored squiggle, press Ctrl+. or select the light bulb, error light bulb, or screwdriver icon in the margin.
Visual Studio then shows you a list of possible fixes or refactorings you can apply to that line of code.
What are some common compile time errors?
Compile-time errors rise at compile-time, before the execution of the program.
Syntax error or missing file reference that prevents the program from successfully compiling is an example of this.
Lexical:
This includes misspellings of identifiers keywords or operators . What are some common compiler errors?
Logic errors occur when executed code does not produce the expected result.
Logic errors are best handled by meticulous program debugging.
Compile-time errors rise at compile-time, before the execution of the program.
Syntax error or missing file reference that prevents the program from successfully compiling is an example of this.
What is the difference between a compile time error and a runtime error?
A compiler cannot easily detect a runtime error.
Thus, we need to identify it during the execution of code.
A compile-time error generally refers to the errors that correspond to the semantics or syntax.
A runtime error refers to the error that we encounter during the code execution during runtime.
C++ programming technique
Substitution failure is not an error (SFINAE) is a principle in C++ where an invalid substitution of template parameters is not in itself an error.
David Vandevoorde first introduced the acronym SFINAE to describe related programming techniques.
