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Debug print tag union payloads as tuples

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This commit is contained in:
Richard Feldman 2022-05-27 23:01:07 -04:00
parent f2a7ecb392
commit 29bc67a12f
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1 changed files with 47 additions and 2 deletions
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49
bindgen/src/bindgen_rs.rs
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@ -1053,14 +1053,59 @@ pub struct {name} {{
// If it's a ManuallyDrop, we need a `*` prefix to dereference it
// (because otherwise we're using ManuallyDrop's Debug instance
// rather than the Debug instance of the value it wraps).
let deref_str = if types.get(payload_id).has_pointer(types) {
let payload_type = types.get(payload_id);
let deref_str = if payload_type.has_pointer(types) {
"&*"
} else {
"&"
};
let fields_str = match payload_type {
RocType::RocStr
| RocType::Bool
| RocType::I8
| RocType::U8
| RocType::I16
| RocType::U16
| RocType::I32
| RocType::U32
| RocType::I64
| RocType::U64
| RocType::I128
| RocType::U128
| RocType::F32
| RocType::F64
| RocType::F128
| RocType::RocDec
| RocType::RocList(_)
| RocType::RocDict(_, _)
| RocType::RocSet(_)
| RocType::RocBox(_)
| RocType::TagUnion(_) => {
format!(".field({deref_str}{actual_self}.{tag_name})")
}
RocType::TransparentWrapper { .. } => {
format!(".field(&({deref_str}{actual_self}.{tag_name}).0)")
}
RocType::Struct { fields, .. } => {
let mut buf = Vec::new();
for field in fields {
let label = field.label();
buf.push(format!(
".field(&({deref_str}{actual_self}.{tag_name}).{label})"
));
}
buf.join("\n")
}
};
format!(
r#"f.debug_tuple("{tag_name}").field({deref_str}{actual_self}.{tag_name}).finish(),"#,
r#"f.debug_tuple("{tag_name}")
{fields_str}
.finish(),"#,
)
}
None => format!(r#"f.write_str("{tag_name}"),"#),