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parser: check undefined variable in if guard (#15882)

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yuyi 2022-09-26 15:17:39 +08:00 committed by GitHub
parent 8623186d31
commit 959eeaf1f3
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3 changed files with 16 additions and 0 deletions
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3
vlib/v/parser/assign.v
View File

@ -200,6 +200,9 @@ fn (mut p Parser) check_undefined_variables_by_names(names []string, val ast.Exp
ast.PrefixExpr {
p.check_undefined_variables_by_names(names, val.right)?
}
ast.SelectorExpr {
p.check_undefined_variables_by_names(names, val.expr)?
}
ast.StringInterLiteral {
for expr_ in val.exprs {
p.check_undefined_variables_by_names(names, expr_)?

7
vlib/v/parser/tests/if_guard_undefined_variable_err.out Normal file
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@ -0,0 +1,7 @@
vlib/v/parser/tests/if_guard_undefined_variable_err.vv:4:10: error: undefined variable: `f`
2 |
3 | fn main() {
4 | if f := f.g.x() {
| ^
5 | }
6 | }

6
vlib/v/parser/tests/if_guard_undefined_variable_err.vv Normal file
View File

@ -0,0 +1,6 @@
module main
fn main() {
if f := f.g.x() {
}
}