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num-macros: port from ast::VariantKind to ast::VariantData

This commit is contained in:
Josh Stone 2015-10-23 10:49:01 -07:00
parent 9e5a209dcd
commit fe99867590
1 changed files with 10 additions and 10 deletions
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20
num-macros/src/lib.rs
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@ -132,15 +132,8 @@ fn cs_from(name: &str, cx: &mut ExtCtxt, trait_span: Span, substr: &Substructure
let mut arms = Vec::new();
for variant in &enum_def.variants {
match variant.node.kind {
ast::TupleVariantKind(ref args) => {
if !args.is_empty() {
cx.span_err(trait_span,
"`FromPrimitive` cannot be derived for \
enum variants with arguments");
return cx.expr_fail(trait_span,
InternedString::new(""));
}
match *variant.node.data {
ast::VariantData::Unit(..) => {
let span = variant.span;
// expr for `$n == $variant as $name`
@ -163,7 +156,14 @@ fn cs_from(name: &str, cx: &mut ExtCtxt, trait_span: Span, substr: &Substructure
arms.push(arm);
}
ast::StructVariantKind(_) => {
ast::VariantData::Tuple(..) => {
cx.span_err(trait_span,
"`FromPrimitive` cannot be derived for \
enum variants with arguments");
return cx.expr_fail(trait_span,
InternedString::new(""));
}
ast::VariantData::Struct(..) => {
cx.span_err(trait_span,
"`FromPrimitive` cannot be derived for enums \
with struct variants");