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yhirose 2022-09-01 20:43:32 -04:00
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@ -597,6 +597,27 @@ sample.java:8:6: invalid statement
As you can see, it can now show more than one error, and provide more meaningful error messages than the default messages. As you can see, it can now show more than one error, and provide more meaningful error messages than the default messages.
### Custom error message for definitions
We can associate custom error messages to definitions.
```peg
# custom_message.peg
START <- CODE (',' CODE)*
CODE <- < '0x' [a-fA-F0-9]+ > { error_message 'code format error...' }
%whitespace <- [ \t]*
```
```
> cat custom_message.txt
0x1234,0x@@@@,0xABCD
> peglint custom_message.peg custom_message.txt
custom_message.txt:1:8: code format error...
```
NOTE: If there are more than one elements with error message instruction in a prioritized choice, this feature may not work as you expect.
peglint - PEG syntax lint utility peglint - PEG syntax lint utility
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