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string cast: better error message

pull/1260/head
Alexander Medvednikov 2019-07-21 00:04:34 +02:00
parent c3c6648c57
commit 1b4656a4dc
1 changed files with 22 additions and 17 deletions
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39
compiler/parser.v
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@ -2668,26 +2668,31 @@ fn (p mut Parser) cast(typ string) string {
// `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')
if typ == 'string' {
if 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(')
}
p.gen(', ')
p.check_types(p.expression(), 'int')
} else {
if is_bytearr {
p.gen('.data')
}
p.cgen.set_placeholder(pos, 'tos2(')
}
// `string(234)` => error
else if expr_typ == 'int' {
p.error('cannot cast `$expr_typ` to `$typ`, use `str()` method instead')
}
else {
p.error('cannot cast `$expr_typ` to `$typ`')
}
}
// `string(234)` => error
else if typ == 'string' && expr_typ == 'int' {
p.error('cannot cast `$expr_typ` to `$typ`, use `str()` method instead')
}
else {
p.cgen.set_placeholder(pos, '($typ)(')
}