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string(bytes_array) cast

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This commit is contained in:
Alexander Medvednikov 2019-07-20 22:03:38 +02:00
parent 7f512eaf72
commit c3c6648c57
2 changed files with 12 additions and 1 deletions
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11
compiler/parser.v
View File

@ -2665,13 +2665,22 @@ fn (p mut Parser) cast(typ string) string {
p.expected_type = ''
// `string(buffer)` => `tos2(buffer)`
// `string(buffer, len)` => `tos(buffer, len)`
if typ == 'string' && (expr_typ == 'byte*' || expr_typ == 'byteptr') {
// `string(bytes_array, len)` => `tos(bytes_array.data, len)`
is_byteptr := expr_typ == 'byte*' || expr_typ == 'byteptr'
is_bytearr := expr_typ == 'array_byte'
if typ == 'string' && (is_byteptr || is_bytearr) {
if p.tok == .comma {
p.check(.comma)
p.cgen.set_placeholder(pos, 'tos(')
if is_bytearr {
p.gen('.data')
}
p.gen(', ')
p.check_types(p.expression(), 'int')
} else {
if is_bytearr {
p.gen('.data')
}
p.cgen.set_placeholder(pos, 'tos2(')
}
}

2
vlib/builtin/string_test.v
View File

@ -328,4 +328,6 @@ fn test_bytes_to_string() {
buf[4] = `o`
assert string(buf) == 'hello'
assert string(buf, 2) == 'he'
bytes := [`h`, `e`, `l`, `l`, `o`]
assert string(bytes) == 'hello'
}