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Improve error line squiggle logic

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gingerBill
2023-02-27 15:58:32 +00:00
parent 9c7656d59a
commit 1f17a391c6
3 changed files with 22 additions and 22 deletions
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36
src/error.cpp
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@@ -261,30 +261,31 @@ gb_internal bool show_error_on_line(TokenPos const &pos, TokenPos end) {
enum {
MAX_LINE_LENGTH = 80,
MAX_TAB_WIDTH = 8,
ELLIPSIS_PADDING = 8 // `... ...`
ELLIPSIS_PADDING = 8, // `... ...`
MAX_LINE_LENGTH_PADDED = MAX_LINE_LENGTH-MAX_TAB_WIDTH-ELLIPSIS_PADDING,
};
error_out("\t");
terminal_set_colours(TerminalStyle_Bold, TerminalColour_White);
i32 error_length = gb_max(end.offset - pos.offset, 1);
isize squiggle_extra = 0;
if (line.len+MAX_TAB_WIDTH+ELLIPSIS_PADDING > MAX_LINE_LENGTH) {
i32 const half_width = MAX_LINE_LENGTH/2;
i32 left = cast(i32)(offset);
i32 right = cast(i32)(line.len - offset);
left = gb_min(left, half_width);
right = gb_min(right, half_width);
if (line.len > MAX_LINE_LENGTH_PADDED) {
i32 left = MAX_TAB_WIDTH;
line.text += offset-left;
line.len -= offset+right-left;
line = string_trim_whitespace(line);
squiggle_extra = ELLIPSIS_PADDING/2 + 1;
offset = left + ELLIPSIS_PADDING/2;
line.len -= offset-left;
offset = left+MAX_TAB_WIDTH/2;
if (line.len > MAX_LINE_LENGTH_PADDED) {
line.len = MAX_LINE_LENGTH_PADDED;
if (error_length > line.len-left) {
error_length = cast(i32)line.len - left;
squiggle_extra = 1;
}
}
error_out("... %.*s ...", LIT(line));
} else {
error_out("%.*s", LIT(line));
@@ -304,11 +305,10 @@ gb_internal bool show_error_on_line(TokenPos const &pos, TokenPos end) {
error_out("~");
}
} else if (end.line == pos.line && end.column > pos.column) {
i32 length = gb_min(end.offset - pos.offset, cast(i32)(line.len-offset));
for (i32 i = 1; i < length-1+squiggle_extra; i++) {
for (i32 i = 1; i < error_length-1+squiggle_extra; i++) {
error_out("~");
}
if (length > 1 && squiggle_extra == 0) {
if (error_length > 1 && squiggle_extra == 0) {
error_out("^");
}
}