2 posts tagged with "error"

Delete words backward​

• delete 1 word: db
• delete n words: d<number>b

Delete word forward​

• dw: delete one word.

Change the current word inpalce​

• cw: chagne the current word

Suppose you are writing a lexical analyzer(Lexer), and you want return some customized errors while the lexer scan tokens, and there are 3 possibel error will happens:

• Not Supported Tokens.
• Invalid Strings.
• Invalid Nums.

SO you can define the errors with a rust enum:

pub enum LexerError {
    InvalidToken(char),
    InvalidString(String),
    InvalidNum(String),
}