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parser: add duplicate import symbol detect

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This commit is contained in:
kbkpbot 2025-08-29 15:50:49 +08:00
parent 9e1273ae71
commit 2b1978ab38
2 changed files with 5 additions and 18 deletions
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18
vlib/v/fmt/tests/import_duplicate_input.vv
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@ -1,18 +0,0 @@
import math
import os
import math
// keep comment
import gg
import gg { MouseButton }
import time { Duration }
import time { Duration }
import math.complex { Complex }
import math.complex { Complex }
const mypi = math.pi
const mb = MouseButton{}
const complex = Complex{}
fn main() {
println(os.path_separator)
}

5
vlib/v/parser/module.v
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@ -310,6 +310,11 @@ fn (mut p Parser) import_syms(mut parent ast.Import) {
for p.tok.kind == .name { for p.tok.kind == .name {
pos := p.tok.pos() pos := p.tok.pos()
alias := p.check_name() alias := p.check_name()
if alias in p.imported_symbols {
p.error_with_pos('cannot register symbol `${alias}`, it was already imported',
pos)
return
}
p.imported_symbols[alias] = parent.mod + '.' + alias p.imported_symbols[alias] = parent.mod + '.' + alias
// so we can work with this in fmt+checker // so we can work with this in fmt+checker
parent.syms << ast.ImportSymbol{ parent.syms << ast.ImportSymbol{