golang error: "invalid character..." How to solve it?

When writing code using golang, sometimes you will encounter an error message: "invalid character...". This error is usually caused by the code containing special characters such as illegal characters or invisible characters. If this error is not fixed in time, it will cause the code to fail to compile successfully, which will affect the development progress of the project. Therefore, how to solve the "invalid character..." error reported by golang is a problem that every golang developer must face.

This article will give a detailed introduction and solution to the golang error "invalid character..." from the following two aspects:

1. Error cause analysis
2. Solution summary
3. Error cause analysis

golang error "invalid character..." usually has three reasons:

(1) The code contains incorrectly encoded characters, such as Non-ASCII characters, etc.;
(2) There are invisible characters in the code, such as Tab key, line feed character, carriage return character, etc.;
(3) The encoding format of the code file is the same as the encoding format required by the golang source code file. Inconsistent.

For the first reason, it can be solved by changing the encoding format of the code file to UTF-8 or ASCII code; for the second reason, it needs to be solved by deleting or replacing invisible characters; For the third reason, you need to solve it by setting the encoding format of the golang source code file or the encoding format when saving the source code file.

The following introduces how to solve the error reporting problems caused by these three reasons through different methods:

(1) The code contains incorrectly encoded characters

In There are only 128 characters in ASCII code, while there are 65536 characters in Unicode encoding. Therefore, in the golang source code file, as long as the characters written in ASCII code are used, there will be no errors caused by the encoding format, because ASCII characters Part of the Unicode character set. However, if non-ASCII-encoded characters are used in the source code file, such as Chinese, Japanese, Korean, etc., character encoding inconsistencies will occur, which will lead to "invalid character..." errors.

This situation can be solved by modifying the file encoding format. The specific steps are as follows:

1. Select the golang source code file and right-click to open the file properties dialog box.
2. In the "Properties" dialog box, click the "General" tab and select the file encoding format as "UTF-8" or "ASCII Code". If the current encoding format is not UTF-8 or ASCII, you can select the corresponding encoding format to change it.
3. Click the "OK" button to save changes and close the dialog box.

(2) There are invisible characters in the code

When golang compiles the source code, all characters in the code file will be compiled and processed, but some characters are invisible. , such as Tab key, line feed character, carriage return character, etc. When these invisible characters appear in source code files, the compiler cannot recognize them, resulting in an "invalid character..." error.

In this case, you can use a text editor to find and replace invisible characters. The specific steps are as follows:

1. Use a text editor to open the golang source code file.
2. In the editor, press the Ctrl H key combination on the keyboard to open the "Find and Replace" dialog box.
3. Input the character encoding or character sequence corresponding to the invisible character in the "Search" text box. For example, the character encoding corresponding to the Tab key is " ", the character encoding corresponding to the newline character is "
   ", etc. .
4. Enter visible characters, such as spaces, in the "Replace" text box.
5. Click the "Replace All" or "Replace All" button to replace all invisible characters with visible characters.
6. Save changes and recompile golang source code files.

(3) The encoding format of the code file is inconsistent with the encoding format required by the golang source code file

The encoding format required by the golang source code file must be UTF-8 or ASCII code, if the encoding format of the code file is inconsistent with the requirements of the golang source code file, an encoding format mismatch error will occur, resulting in an "invalid character..." error.

This situation can be solved by setting the encoding format of the golang source code file or the encoding format when saving the source code file. The specific steps are as follows:

1. Add a comment in the first line of the golang source code file to specify the encoding format of the file, such as "//coding:utf-8" or "//coding:ascii".
2. Save changes and recompile golang source code files.
3. Summary of solutions

golang error "invalid character..." is usually caused by the code containing special characters such as illegal characters or invisible characters. This kind of error can be solved by modifying the file encoding format, replacing invisible characters, setting the source code file encoding format, etc. The following is a summary of the solutions:

(1) The code contains incorrectly encoded characters

• Change the encoding format of the source code file to UTF-8 or ASCII code.

(2) Invisible characters exist in the code

• Use a text editor to find and replace all invisible characters with visible characters.

(3) The encoding format of the code file is inconsistent with the encoding format required by the golang source code file

• Add a comment to the first line of the code file to specify the encoding format of the file.

The above is the analysis and solution summary of the error "invalid character..." reported by golang. I hope it will be helpful to golang developers.

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