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builtin: correct error underline for unicode wide chars (#9010)

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zakuro 2021-03-01 08:18:02 +09:00 committed by GitHub
parent e937d6249c
commit ce115dcbe0
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5 changed files with 172 additions and 53 deletions
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104
vlib/builtin/utf8.v
View File

@ -22,26 +22,28 @@ pub fn utf32_to_str_no_malloc(code u32, buf voidptr) string {
mut res := '' mut res := ''
unsafe { unsafe {
mut buffer := byteptr(buf) mut buffer := byteptr(buf)
if icode <= 127 { /* 0x7F */ if icode <= 127 {
// 0x7F
buffer[0] = byte(icode) buffer[0] = byte(icode)
res = tos(buffer, 1) res = tos(buffer, 1)
} } else if icode <= 2047 {
else if icode <= 2047 { /* 0x7FF */ // 0x7FF
buffer[0] = 192 | byte(icode>>6) /* 0xC0 - 110xxxxx */ buffer[0] = 192 | byte(icode >> 6) // 0xC0 - 110xxxxx
buffer[1] = 128 | byte(icode & 63) /* 0x80 - 0x3F - 10xxxxxx */ buffer[1] = 128 | byte(icode & 63) // 0x80 - 0x3F - 10xxxxxx
res = tos(buffer, 2) res = tos(buffer, 2)
} } else if icode <= 65535 {
else if icode <= 65535 { /* 0xFFFF */ // 0xFFFF
buffer[0] = 224 | byte(icode>>12)/* 0xE0 - 1110xxxx */ buffer[0] = 224 | byte(icode >> 12) // 0xE0 - 1110xxxx
buffer[1] = 128 | (byte(icode>>6) & 63) /* 0x80 - 0x3F - 10xxxxxx */ buffer[1] = 128 | (byte(icode >> 6) & 63) // 0x80 - 0x3F - 10xxxxxx
buffer[2] = 128 | byte(icode & 63) /* 0x80 - 0x3F - 10xxxxxx */ buffer[2] = 128 | byte(icode & 63) // 0x80 - 0x3F - 10xxxxxx
res = tos(buffer, 3) res = tos(buffer, 3)
} }
else if icode <= 1114111/* 0x10FFFF */ { // 0x10FFFF
buffer[0] = 240 | byte(icode>>18) /* 0xF0 - 11110xxx */ else if icode <= 1114111 {
buffer[1] = 128 | (byte(icode>>12) & 63) /* 0x80 - 0x3F - 10xxxxxx */ buffer[0] = 240 | byte(icode >> 18) // 0xF0 - 11110xxx
buffer[2] = 128 | (byte(icode>>6) & 63) /* 0x80 - 0x3F - 10xxxxxx */ buffer[1] = 128 | (byte(icode >> 12) & 63) // 0x80 - 0x3F - 10xxxxxx
buffer[3] = 128 | byte(icode & 63) /* 0x80 - 0x3F - 10xxxxxx */ buffer[2] = 128 | (byte(icode >> 6) & 63) // 0x80 - 0x3F - 10xxxxxx
buffer[3] = 128 | byte(icode & 63) // 0x80 - 0x3F - 10xxxxxx
res = tos(buffer, 4) res = tos(buffer, 4)
} }
} }
@ -80,15 +82,13 @@ fn utf8_len(c byte) int {
if (x & 240) != 0 { if (x & 240) != 0 {
// 0xF0 // 0xF0
x >>= 4 x >>= 4
} } else {
else {
b += 4 b += 4
} }
if (x & 12) != 0 { if (x & 12) != 0 {
// 0x0C // 0x0C
x >>= 2 x >>= 2
} } else {
else {
b += 2 b += 2
} }
if (x & 2) == 0 { if (x & 2) == 0 {
@ -114,7 +114,9 @@ fn utf8_str_len(s string) int {
} }
// Calculate string length for formatting, i.e. number of "characters" // Calculate string length for formatting, i.e. number of "characters"
fn utf8_str_visible_length(s string) int { // This is simplified implementation. if you need specification compliant width,
// use utf8.east_asian.display_width.
pub fn utf8_str_visible_length(s string) int {
mut l := 0 mut l := 0
mut ul := 1 mut ul := 1
for i := 0; i < s.len; i += ul { for i := 0; i < s.len; i += ul {
@ -129,24 +131,58 @@ fn utf8_str_visible_length(s string) int {
return l return l
} }
l++ l++
// recognize combining characters // recognize combining characters and wide characters
if c == 0xcc || c == 0xcd { match ul {
r := (u16(c) << 8) | unsafe {s.str[i+1]} 2 {
if r >= 0xcc80 && r < 0xcdb0 { // diacritical marks r := u64((u16(c) << 8) | unsafe { s.str[i + 1] })
if r >= 0xcc80 && r < 0xcdb0 {
// diacritical marks
l-- l--
} }
} else if c == 0xe1 || c == 0xe2 || c == 0xef { }
r := (u32(c) << 16) | unsafe {(u32(s.str[i+1]) << 8) | s.str[i+2]} 3 {
// diacritical marks extended 0xe1aab0 - 0xe1ac80 r := u64((u32(c) << 16) | unsafe { (u32(s.str[i + 1]) << 8) | s.str[i + 2] })
// diacritical marks supplement 0xe1b780 - 0xe1b880 // diacritical marks extended
// diacritical marks for symbols 0xe28390 - 0xe28480 // diacritical marks supplement
// half marks 0xefb8a0 - 0xefb8b0 // diacritical marks for symbols
if (r >= 0xe1aab0 && r < 0xe1ac80) if (r >= 0xe1aab0 && r <= 0xe1ac7f)
|| (r >= 0xe1b780 && r < 0xe1b880) || (r >= 0xe1b780 && r <= 0xe1b87f)
|| (r >= 0xe28390 && r < 0xe28480) || (r >= 0xe28390 && r <= 0xe2847f)
|| (r >= 0xefb8a0 && r < 0xefb8b0) { || (r >= 0xefb8a0 && r <= 0xefb8af) {
// diacritical marks
l-- l--
} }
// Hangru
// CJK Unified Ideographics
// Hangru
// CJK
else if (r >= 0xe18480 && r <= 0xe1859f)
|| (r >= 0xe2ba80 && r <= 0xe2bf95)
|| (r >= 0xe38080 && r <= 0xe4b77f)
|| (r >= 0xe4b880 && r <= 0xea807f)
|| (r >= 0xeaa5a0 && r <= 0xeaa79f)
|| (r >= 0xeab080 && r <= 0xed9eaf)
|| (r >= 0xefa480 && r <= 0xefac7f)
|| (r >= 0xefb8b8 && r <= 0xefb9af) {
// half marks
l++
}
}
4 {
r := u64((u32(c) << 24) | unsafe {
(u32(s.str[i + 1]) << 16) | (u32(s.str[i + 2]) << 8) | s.str[i + 3]
})
// Enclosed Ideographic Supplement
// Emoji
// CJK Unified Ideographs Extension B-G
if (r >= 0x0f9f8880 && r <= 0xf09f8a8f)
|| (r >= 0xf09f8c80 && r <= 0xf09f9c90)
|| (r >= 0xf09fa490 && r <= 0xf09fa7af)
|| (r >= 0xff0a08080 && r <= 0xf180807f) {
l++
}
}
else {}
} }
} }
return l return l

13
vlib/v/checker/checker.v
View File

@ -4407,15 +4407,15 @@ fn (mut c Checker) match_exprs(mut node ast.MatchExpr, cond_type_sym table.TypeS
for expr in branch.exprs { for expr in branch.exprs {
mut key := '' mut key := ''
if expr is ast.RangeExpr { if expr is ast.RangeExpr {
mut low := 0 mut low := i64(0)
mut high := 0 mut high := i64(0)
c.expected_type = node.expected_type c.expected_type = node.expected_type
low_expr := expr.low low_expr := expr.low
high_expr := expr.high high_expr := expr.high
if low_expr is ast.IntegerLiteral { if low_expr is ast.IntegerLiteral {
if high_expr is ast.IntegerLiteral { if high_expr is ast.IntegerLiteral {
low = low_expr.val.int() low = low_expr.val.i64()
high = high_expr.val.int() high = high_expr.val.i64()
} else { } else {
c.error('mismatched range types', low_expr.pos) c.error('mismatched range types', low_expr.pos)
} }
@ -4430,6 +4430,11 @@ fn (mut c Checker) match_exprs(mut node ast.MatchExpr, cond_type_sym table.TypeS
typ := c.table.type_to_str(c.expr(expr.low)) typ := c.table.type_to_str(c.expr(expr.low))
c.error('cannot use type `$typ` in match range', branch.pos) c.error('cannot use type `$typ` in match range', branch.pos)
} }
high_low_cutoff := 1000
if high - low > high_low_cutoff {
c.warn('more than $high_low_cutoff possibilities ($low ... $high) in match range',
branch.pos)
}
for i in low .. high + 1 { for i in low .. high + 1 {
key = i.str() key = i.str()
val := if key in branch_exprs { branch_exprs[key] } else { 0 } val := if key in branch_exprs { branch_exprs[key] } else { 0 }

55
vlib/v/checker/tests/error_with_unicode.out Normal file
View File

@ -0,0 +1,55 @@
vlib/v/checker/tests/error_with_unicode.vv:5:17: error: cannot use `int literal` as `string` in argument 2 to `f1`
3 |
4 | fn main() {
5 | f1('🐀🐈', 0)
| ^
6 | f2(0, '🐟🐧')
7 | mut n := 0
vlib/v/checker/tests/error_with_unicode.vv:6:8: error: cannot use `string` as `int` in argument 2 to `f2`
4 | fn main() {
5 | f1('🐀🐈', 0)
6 | f2(0, '🐟🐧')
| ~~~~~~
7 | mut n := 0
8 | n = '漢字'
vlib/v/checker/tests/error_with_unicode.vv:8:6: error: cannot assign to `n`: expected `int`, not `string`
6 | f2(0, '🐟🐧')
7 | mut n := 0
8 | n = '漢字'
| ~~~~~~
9 | n = 'ひらがな'
10 | n = '简体字'
vlib/v/checker/tests/error_with_unicode.vv:9:6: error: cannot assign to `n`: expected `int`, not `string`
7 | mut n := 0
8 | n = '漢字'
9 | n = 'ひらがな'
| ~~~~~~~~~~
10 | n = '简体字'
11 | n = '繁體字'
vlib/v/checker/tests/error_with_unicode.vv:10:6: error: cannot assign to `n`: expected `int`, not `string`
8 | n = '漢字'
9 | n = 'ひらがな'
10 | n = '简体字'
| ~~~~~~~~
11 | n = '繁體字'
12 | n = '한글'
vlib/v/checker/tests/error_with_unicode.vv:11:6: error: cannot assign to `n`: expected `int`, not `string`
9 | n = 'ひらがな'
10 | n = '简体字'
11 | n = '繁體字'
| ~~~~~~~~
12 | n = '한글'
13 | n = 'Кириллица'
vlib/v/checker/tests/error_with_unicode.vv:12:6: error: cannot assign to `n`: expected `int`, not `string`
10 | n = '简体字'
11 | n = '繁體字'
12 | n = '한글'
| ~~~~~~
13 | n = 'Кириллица'
14 | }
vlib/v/checker/tests/error_with_unicode.vv:13:6: error: cannot assign to `n`: expected `int`, not `string`
11 | n = '繁體字'
12 | n = '한글'
13 | n = 'Кириллица'
| ~~~~~~~~~~~
14 | }

14
vlib/v/checker/tests/error_with_unicode.vv Normal file
View File

@ -0,0 +1,14 @@
fn f1(_ string, _ string) {}
fn f2(_ int, _ int) {}
fn main() {
f1('🐀🐈', 0)
f2(0, '🐟🐧')
mut n := 0
n = '漢字'
n = 'ひらがな'
n = '简体字'
n = '繁體字'
n = '한글'
n = 'Кириллица'
}

23
vlib/v/util/errors.v
View File

@ -4,6 +4,7 @@
module util module util
import os import os
import strings
import term import term
import v.token import v.token
@ -132,14 +133,22 @@ pub fn source_context(kind string, source string, column int, pos token.Position
// line, so that it prints the ^ character exactly on the *same spot* // line, so that it prints the ^ character exactly on the *same spot*
// where it is needed. That is the reason we can not just // where it is needed. That is the reason we can not just
// use strings.repeat(` `, col) to form it. // use strings.repeat(` `, col) to form it.
mut pointerline := '' mut pointerline_builder := strings.new_builder(sline.len)
for bchar in sline[..start_column] { for i := 0; i < start_column; {
x := if bchar.is_space() { bchar } else { ` ` } if sline[i].is_space() {
pointerline += x.ascii_str() pointerline_builder.write_b(sline[i])
i++
} else {
char_len := utf8_char_len(sline[i])
spaces := ' '.repeat(utf8_str_visible_length(sline[i..i + char_len]))
pointerline_builder.write_string(spaces)
i += char_len
} }
underline := if pos.len > 1 { '~'.repeat(end_column - start_column) } else { '^' } }
pointerline += bold(color(kind, underline)) underline_len := utf8_str_visible_length(sline[start_column..end_column])
clines << ' | ' + pointerline.replace('\t', tab_spaces) underline := if underline_len > 1 { '~'.repeat(underline_len) } else { '^' }
pointerline_builder.write_string(bold(color(kind, underline)))
clines << ' | ' + pointerline_builder.str().replace('\t', tab_spaces)
} }
} }
return clines return clines