checker: do not allow empty enums (#7848)
parent
55d5b9e724
commit
3dae44db73
vlib/v/checker
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@ -2194,6 +2194,9 @@ pub fn (mut c Checker) const_decl(mut node ast.ConstDecl) {
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pub fn (mut c Checker) enum_decl(decl ast.EnumDecl) {
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c.check_valid_pascal_case(decl.name, 'enum name', decl.pos)
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mut seen := []i64{}
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if decl.fields.len == 0 {
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c.error('enum cannot be empty', decl.pos)
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}
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for i, field in decl.fields {
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if !c.pref.experimental && util.contains_capital(field.name) {
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// TODO C2V uses hundreds of enums with capitals, remove -experimental check once it's handled
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@ -0,0 +1,3 @@
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vlib/v/checker/tests/enum_empty.vv:1:1: error: enum cannot be empty
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1 | enum Empty {}
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| ~~~~~~~~~~
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@ -0,0 +1 @@
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enum Empty {}
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