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use super::error::{GenError, GenResult};
use super::*;
impl Codegen {
pub(super) fn generate_class_members(&self, members: &[IrNode]) -> GenResult<TokenStream> {
// Check if any member contains control flow (for loop, if, etc.)
let has_control_flow = members.iter().any(|n| {
matches!(
n,
IrNode::For { .. }
| IrNode::If { .. }
| IrNode::While { .. }
| IrNode::Match { .. }
| IrNode::Let { .. }
| IrNode::Do { .. }
)
});
if has_control_flow {
// Generate code that dynamically builds the vec
let member_pushes = self.generate_class_member_pushes(members)?;
Ok(quote! {
{
let mut __class_members: Vec<macroforge_ts::swc_core::ecma::ast::ClassMember> = Vec::new();
#member_pushes
__class_members
}
})
} else {
// No control flow - generate literal vec
let members_code: Vec<TokenStream> = members
.iter()
.map(|m| self.generate_class_member(m))
.collect::<GenResult<Vec<_>>>()?;
Ok(quote! { vec![#(#members_code),*] })
}
}
pub(super) fn generate_class_member_pushes(
&self,
members: &[IrNode],
) -> GenResult<TokenStream> {
let pushes: Vec<TokenStream> = members
.iter()
.map(|m| self.generate_class_member_push(m))
.collect::<GenResult<Vec<_>>>()?;
Ok(quote! { #(#pushes)* })
}
pub(super) fn generate_class_member_push(&self, node: &IrNode) -> GenResult<TokenStream> {
match node {
IrNode::For {
pattern,
iterator,
body,
..
} => {
let body_pushes = self.generate_class_member_pushes(body)?;
Ok(quote! {
for #pattern in #iterator { #body_pushes }
})
}
IrNode::If {
condition,
then_body,
else_if_branches,
else_body,
..
} => {
let then_pushes = self.generate_class_member_pushes(then_body)?;
let else_code = if else_if_branches.is_empty() && else_body.is_none() {
quote! {}
} else {
let mut branches = TokenStream::new();
for (cond, body) in else_if_branches {
let b = self.generate_class_member_pushes(body)?;
branches.extend(quote! { else if #cond { #b } });
}
if let Some(eb) = else_body {
let eb_pushes = self.generate_class_member_pushes(eb)?;
branches.extend(quote! { else { #eb_pushes } });
}
branches
};
Ok(quote! {
if #condition { #then_pushes } #else_code
})
}
IrNode::While {
condition, body, ..
} => {
let body_pushes = self.generate_class_member_pushes(body)?;
Ok(quote! {
while #condition { #body_pushes }
})
}
IrNode::Match { expr, arms, .. } => {
let arm_tokens: Vec<TokenStream> = arms
.iter()
.map(
|MatchArm {
pattern,
guard,
body,
..
}| {
let b = self.generate_class_member_pushes(body)?;
if let Some(g) = guard {
Ok(quote! { #pattern if #g => { #b } })
} else {
Ok(quote! { #pattern => { #b } })
}
},
)
.collect::<GenResult<Vec<_>>>()?;
Ok(quote! {
match #expr { #(#arm_tokens)* }
})
}
IrNode::Let {
pattern,
mutable,
type_hint,
value,
..
} => {
let mutability = if *mutable {
quote! { mut }
} else {
quote! {}
};
if let Some(ty) = type_hint {
Ok(quote! { let #mutability #pattern: #ty = #value; })
} else {
Ok(quote! { let #mutability #pattern = #value; })
}
}
IrNode::Do { code, .. } => Ok(quote! { #code; }),
_ => {
// Regular class member - push to __class_members
let member_code = self.generate_class_member(node)?;
Ok(quote! { __class_members.push(#member_code); })
}
}
}
pub(super) fn generate_class_member(&self, node: &IrNode) -> GenResult<TokenStream> {
match node {
IrNode::Constructor {
accessibility,
params,
body,
..
} => {
let params_code = self.generate_constructor_params(params)?;
let body_code = match body {
Some(b) => self.generate_block_stmt_opt(b)?,
None => quote! { None },
};
let accessibility_code = match accessibility {
Some(Accessibility::Public) => {
quote! { Some(macroforge_ts::swc_core::ecma::ast::Accessibility::Public) }
}
Some(Accessibility::Private) => {
quote! { Some(macroforge_ts::swc_core::ecma::ast::Accessibility::Private) }
}
Some(Accessibility::Protected) => {
quote! { Some(macroforge_ts::swc_core::ecma::ast::Accessibility::Protected) }
}
None => quote! { None },
};
Ok(quote! {
macroforge_ts::swc_core::ecma::ast::ClassMember::Constructor(
macroforge_ts::swc_core::ecma::ast::Constructor {
span: macroforge_ts::swc_core::common::DUMMY_SP,
ctxt: macroforge_ts::swc_core::common::SyntaxContext::empty(),
key: macroforge_ts::swc_core::ecma::ast::PropName::Ident(
macroforge_ts::swc_core::ecma::ast::IdentName::new(
"constructor".into(),
macroforge_ts::swc_core::common::DUMMY_SP,
)
),
params: #params_code,
body: #body_code,
accessibility: #accessibility_code,
is_optional: false,
}
)
})
}
IrNode::Method {
static_,
accessibility,
readonly,
async_,
generator,
kind,
name,
optional,
type_params,
params,
return_type,
body,
..
} => {
// TypeScript doesn't support readonly on methods - it's only valid on properties.
// We consume the field to satisfy the compiler but assert it should always be false.
debug_assert!(!readonly, "readonly is not valid on class methods");
let name_code = self.generate_prop_name(name)?;
let params_code = self.generate_params(params)?;
let body_code = match body {
Some(b) => self.generate_block_stmt_opt(b)?,
None => quote! { None },
};
let return_type_code = match return_type {
Some(t) => {
let tc = self.generate_type_ann(t)?;
quote! { Some(Box::new(#tc)) }
}
None => quote! { None },
};
let type_params_code = match type_params {
Some(tp) => {
let tpc = self.generate_type_params(tp)?;
quote! { Some(Box::new(#tpc)) }
}
None => quote! { None },
};
let accessibility_code = match accessibility {
Some(Accessibility::Public) => {
quote! { Some(macroforge_ts::swc_core::ecma::ast::Accessibility::Public) }
}
Some(Accessibility::Private) => {
quote! { Some(macroforge_ts::swc_core::ecma::ast::Accessibility::Private) }
}
Some(Accessibility::Protected) => {
quote! { Some(macroforge_ts::swc_core::ecma::ast::Accessibility::Protected) }
}
None => quote! { None },
};
let kind_code = match kind {
MethodKind::Method => {
quote! { macroforge_ts::swc_core::ecma::ast::MethodKind::Method }
}
MethodKind::Getter => {
quote! { macroforge_ts::swc_core::ecma::ast::MethodKind::Getter }
}
MethodKind::Setter => {
quote! { macroforge_ts::swc_core::ecma::ast::MethodKind::Setter }
}
};
Ok(quote! {
macroforge_ts::swc_core::ecma::ast::ClassMember::Method(
macroforge_ts::swc_core::ecma::ast::ClassMethod {
span: macroforge_ts::swc_core::common::DUMMY_SP,
key: #name_code,
function: Box::new(macroforge_ts::swc_core::ecma::ast::Function {
params: #params_code,
decorators: vec![],
span: macroforge_ts::swc_core::common::DUMMY_SP,
ctxt: macroforge_ts::swc_core::common::SyntaxContext::empty(),
body: #body_code,
is_generator: #generator,
is_async: #async_,
type_params: #type_params_code,
return_type: #return_type_code,
}),
kind: #kind_code,
is_static: #static_,
accessibility: #accessibility_code,
is_abstract: false,
is_optional: #optional,
is_override: false,
}
)
})
}
IrNode::ClassProp {
static_,
accessibility,
readonly,
declare,
optional,
definite,
name,
type_ann,
value,
..
} => {
let name_code = self.generate_prop_name(name)?;
let type_ann_code = match type_ann {
Some(t) => {
let tc = self.generate_type_ann(t)?;
quote! { Some(Box::new(#tc)) }
}
None => quote! { None },
};
let value_code = match value {
Some(v) => {
let vc = self.generate_expr(v)?;
quote! { Some(Box::new(#vc)) }
}
None => quote! { None },
};
let accessibility_code = match accessibility {
Some(Accessibility::Public) => {
quote! { Some(macroforge_ts::swc_core::ecma::ast::Accessibility::Public) }
}
Some(Accessibility::Private) => {
quote! { Some(macroforge_ts::swc_core::ecma::ast::Accessibility::Private) }
}
Some(Accessibility::Protected) => {
quote! { Some(macroforge_ts::swc_core::ecma::ast::Accessibility::Protected) }
}
None => quote! { None },
};
Ok(quote! {
macroforge_ts::swc_core::ecma::ast::ClassMember::ClassProp(
macroforge_ts::swc_core::ecma::ast::ClassProp {
span: macroforge_ts::swc_core::common::DUMMY_SP,
key: #name_code,
value: #value_code,
type_ann: #type_ann_code,
is_static: #static_,
decorators: vec![],
accessibility: #accessibility_code,
is_abstract: false,
is_optional: #optional,
is_override: false,
readonly: #readonly,
declare: #declare,
definite: #definite,
}
)
})
}
_ => Err(GenError::unexpected_node(
"class member",
node,
&["Constructor", "Method", "ClassProp"],
)),
}
}
pub(super) fn generate_constructor_params(&self, params: &[IrNode]) -> GenResult<TokenStream> {
let params_code: Vec<TokenStream> = params
.iter()
.map(|p| {
let param_code = self.generate_param(p)?;
Ok(quote! {
macroforge_ts::swc_core::ecma::ast::ParamOrTsParamProp::Param(#param_code)
})
})
.collect::<GenResult<Vec<_>>>()?;
Ok(quote! { vec![#(#params_code),*] })
}
}