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Fix some missing syn invisible group handling in FromMeta implementations #263

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Merged
TedDriggs merged 6 commits into from
Feb 12, 2024
Merged

Fix some missing syn invisible group handling in FromMeta implementations #263

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f68450c
Fix missing syn invisible group handling
Ten0 Feb 8, 2024
aecdfec
Add more missing syn invisible group handling
Ten0 Feb 8, 2024
93abc80
and fix another one
Ten0 Feb 8, 2024
b8fd3ce
Add coment on `Group` in `FromMeta`
Ten0 Feb 12, 2024
b3d68f0
fmt fix
Ten0 Feb 12, 2024
8b5134a
Refer to comment about Group in all relevant implementations
Ten0 Feb 12, 2024
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53 changes: 29 additions & 24 deletions core/src/from_meta.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -292,13 +292,11 @@ impl<T: syn::parse::Parse, P: syn::parse::Parse> FromMeta for syn::punctuated::P
/// alternate parsing modes for this type.
impl FromMeta for syn::Expr {
fn from_expr(expr: &Expr) -> Result<Self> {
if let syn::Expr::Lit(expr_lit) = expr {
if let syn::Lit::Str(_) = &expr_lit.lit {
return Self::from_value(&expr_lit.lit);
}
match expr {
Expr::Lit(syn::ExprLit{lit: lit @ syn::Lit::Str(_), ..}) => Self::from_value(lit),
Expr::Group(group) => Self::from_expr(&group.expr),
_ => Ok(expr.clone()),
}

Ok(expr.clone())
}

fn from_string(value: &str) -> Result<Self> {
Expand Down Expand Up @@ -333,6 +331,7 @@ impl FromMeta for syn::Path {
match expr {
Expr::Lit(lit) => Self::from_value(&lit.lit),
Expr::Path(path) => Ok(path.path.clone()),
Expr::Group(group) => Self::from_expr(&group.expr),
_ => Err(Error::unexpected_expr_type(expr)),
}
}
Expand Down Expand Up @@ -361,6 +360,7 @@ impl FromMeta for syn::Ident {
Some(ident) => Ok(ident.clone()),
None => Err(Error::unexpected_expr_type(expr)),
},
Expr::Group(group) => Self::from_expr(&group.expr),
_ => Err(Error::unexpected_expr_type(expr)),
}
}
Expand All @@ -380,12 +380,11 @@ macro_rules! from_syn_expr_type {
($ty:path, $variant:ident) => {
impl FromMeta for $ty {
fn from_expr(expr: &syn::Expr) -> Result<Self> {
if let syn::Expr::$variant(body) = expr {
Ok(body.clone())
} else if let syn::Expr::Lit(expr_lit) = expr {
Self::from_value(&expr_lit.lit)
} else {
Err(Error::unexpected_expr_type(expr))
match expr {
syn::Expr::$variant(body) => Ok(body.clone()),
syn::Expr::Lit(expr_lit) => Self::from_value(&expr_lit.lit),
syn::Expr::Group(group) => Self::from_expr(&group.expr),
_ => Err(Error::unexpected_expr_type(expr)),
}
}

Expand Down Expand Up @@ -452,21 +451,27 @@ macro_rules! from_numeric_array {
/// Parsing an unsigned integer array, i.e. `example = "[1, 2, 3, 4]"`.
impl FromMeta for Vec<$ty> {
fn from_expr(expr: &syn::Expr) -> Result<Self> {
if let syn::Expr::Array(expr_array) = expr {
let v = expr_array
match expr {
syn::Expr::Array(expr_array) => expr_array
.elems
.iter()
.map(|expr| match expr {
Expr::Lit(lit) => $ty::from_value(&lit.lit),
_ => Err(Error::custom("Expected array of unsigned integers")
.with_span(expr)),
.map(|expr| {
let unexpected = || {
Error::custom("Expected array of unsigned integers").with_span(expr)
};
match expr {
Expr::Lit(lit) => $ty::from_value(&lit.lit),
Expr::Group(group) => match &*group.expr {
Expr::Lit(lit) => $ty::from_value(&lit.lit),
_ => Err(unexpected()),
},
_ => Err(unexpected()),
}
})
.collect::<Result<Vec<$ty>>>();
v
} else if let syn::Expr::Lit(expr_lit) = expr {
Self::from_value(&expr_lit.lit)
} else {
Err(Error::unexpected_expr_type(expr))
.collect::<Result<Vec<$ty>>>(),
syn::Expr::Lit(expr_lit) => Self::from_value(&expr_lit.lit),
syn::Expr::Group(group) => Self::from_expr(&group.expr),
_ => Err(Error::unexpected_expr_type(expr)),
}
}

Expand Down