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TRAP locations: always fix-up empty ranges

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This commit is contained in:
Arthur Baars
2020-10-29 10:45:07 +01:00
parent ca91e15a4b
commit 3350d9d3d4
1 changed files with 26 additions and 28 deletions
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54
extractor/src/extractor.rs
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@@ -286,35 +286,33 @@ fn location_for<'a>(source: &Vec<u8>, fp: &String, label: Label, n: Node) -> Tra
let start_col = n.start_position().column + 1;
let mut end_line = n.end_position().row + 1;
let mut end_col = n.end_position().column;
if end_col == 0 {
if start_line >= end_line {
// the range is empty, clip it to sensible values
end_line = start_line;
end_col = start_col - 1;
} else {
let mut index = n.end_byte();
// end_col = 0 means that we are the start of a line
// unfortunately 0 is invalid as column number, therefore
// we should update the end location to be the end of the
// previous line
if index > 0 && index <= source.len() {
index -= 1;
if source[index] != b'\n' {
error!("expecting a line break symbol, but none found while correcting end column value");
}
end_line -= 1;
end_col = 1;
while index > 0 && source[index - 1] != b'\n' {
index -= 1;
end_col += 1;
}
} else {
error!(
"cannot correct end column value: end_byte index {} is not in range [0,{}]",
index,
source.len()
);
if start_line > end_line || start_line == end_line && start_col > end_col {
// the range is empty, clip it to sensible values
end_line = start_line;
end_col = start_col - 1;
} else if end_col == 0 {
// end_col = 0 means that we are at the start of a line
// unfortunately 0 is invalid as column number, therefore
// we should update the end location to be the end of the
// previous line
let mut index = n.end_byte();
if index > 0 && index <= source.len() {
index -= 1;
if source[index] != b'\n' {
error!("expecting a line break symbol, but none found while correcting end column value");
}
end_line -= 1;
end_col = 1;
while index > 0 && source[index - 1] != b'\n' {
index -= 1;
end_col += 1;
}
} else {
error!(
"cannot correct end column value: end_byte index {} is not in range [1,{}]",
index,
source.len()
);
}
}
TrapEntry::Located(vec![