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Minor refactor of ConstExpr::load().

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This commit is contained in:
Jason Orendorff 2022-05-11 08:34:44 -05:00 committed by Emilio Cobos Álvarez
parent dde68cc439
commit 13b31ddcc2
1 changed files with 10 additions and 16 deletions
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26
src/bindgen/ir/ty.rs
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@ -336,22 +336,16 @@ impl ConstExpr {
pub fn load(expr: &syn::Expr) -> Result<Self, String> {
match *expr {
syn::Expr::Lit(syn::ExprLit {
lit: syn::Lit::Bool(syn::LitBool { value, .. }),
..
}) => Ok(ConstExpr::Value(value.to_string())),
syn::Expr::Lit(syn::ExprLit {
lit: syn::Lit::Int(ref len),
..
}) => Ok(ConstExpr::Value(len.base10_digits().to_string())),
syn::Expr::Lit(syn::ExprLit {
lit: syn::Lit::Byte(ref byte),
..
}) => Ok(ConstExpr::Value(u8::to_string(&byte.value()))),
syn::Expr::Lit(syn::ExprLit {
lit: syn::Lit::Char(ref ch),
..
}) => Ok(ConstExpr::Value(u32::to_string(&ch.value().into()))),
syn::Expr::Lit(syn::ExprLit { ref lit, .. }) => {
let val = match *lit {
syn::Lit::Bool(syn::LitBool { value, .. }) => value.to_string(),
syn::Lit::Int(ref len) => len.base10_digits().to_string(),
syn::Lit::Byte(ref byte) => u8::to_string(&byte.value()),
syn::Lit::Char(ref ch) => u32::to_string(&ch.value().into()),
_ => return Err(format!("can't handle const expression {:?}", lit)),
};
Ok(ConstExpr::Value(val))
}
syn::Expr::Path(ref path) => {
let generic_path = GenericPath::load(&path.path)?;
Ok(ConstExpr::Name(generic_path.export_name().to_owned()))