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The number of columns is misplaced when the shfmt parses the backquote command with escape symbols. #1028
Description
- The shell statement is as follows:
#!/bin/bash
demo=3
last=`echo \\$demo`After parsing,The number of columns of the keyword ‘\$demo’ is misplaced.It's supposed to be 12 to 19, but it's actually 12 to 18.
- shfmt parse tree：
[
{
"Pos": {
"Offset": 27,
"Line": 3,
"Col": 7
},
"End": {
"Offset": 31,
"Line": 3,
"Col": 11
},
"Parts": [
{
"Type": "Lit",
"Pos": {
"Offset": 27,
"Line": 3,
"Col": 7
},
"End": {
"Offset": 31,
"Line": 3,
"Col": 11
},
"ValuePos": {
"Offset": 27,
"Line": 3,
"Col": 7
},
"ValueEnd": {
"Offset": 31,
"Line": 3,
"Col": 11
},
"Value": "echo"
}
]
},
{
"Pos": {
"Offset": 33,
"Line": 3,
"Col": 12
},
"End": {
"Offset": 39,
"Line": 3,
"Col": 18
},
"Parts": [
{
"Type": "Lit",
"Pos": {
"Offset": 33,
"Line": 3,
"Col": 12
},
"End": {
"Offset": 39,
"Line": 3,
"Col": 18
},
"ValuePos": {
"Offset": 33,
"Line": 3,
"Col": 12
},
"ValueEnd": {
"Offset": 39,
"Line": 3,
"Col": 18
},
"Value": "\\$demo"
}
]
}
]
Activity
mvdan commentedon Dec 26, 2023
Thanks. This one was quite tricky to figure out, but I think I have now.
syntax: better column numbers for escapes inside backquotes
syntax: include skipped backslashes in backticks for column numbers