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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,46 +1,82 @@ | ||
| use derive_visitor::VisitorMut; | ||
|
|
||
| use crate::{ | ||
| hir::{Call, Expression, Typed}, | ||
| hir::{ | ||
| Assignment, Call, Expression, ImplicitConversion, ImplicitConversionKind, Initializer, | ||
| Return, Typed, VariableData, | ||
| }, | ||
| syntax::Ranged, | ||
| }; | ||
|
|
||
| use super::Context; | ||
|
|
||
| pub trait CloneIfNeeded: Sized { | ||
| fn clone_if_needed_inplace(&mut self, context: &mut impl Context); | ||
| #[derive(VisitorMut)] | ||
| #[visitor( | ||
| Assignment(exit), | ||
| Return(exit), | ||
| Initializer(exit), | ||
| Call(exit), | ||
| VariableData(exit) | ||
| )] | ||
| pub struct Clonner<'ctx> { | ||
| context: &'ctx mut dyn Context, | ||
| } | ||
|
|
||
| fn clone_if_needed(mut self, context: &mut impl Context) -> Self { | ||
| self.clone_if_needed_inplace(context); | ||
| self | ||
| impl<'ctx> Clonner<'ctx> { | ||
| pub fn new(context: &'ctx mut dyn Context) -> Self { | ||
| Self { context } | ||
| } | ||
| } | ||
|
|
||
| impl CloneIfNeeded for Expression { | ||
| fn clone_if_needed_inplace(&mut self, context: &mut impl Context) { | ||
| fn clone_expr(&mut self, expr: &mut Expression) -> Option<()> { | ||
| if !matches!( | ||
| self, | ||
| Expression::ImplicitConversion(_) | ||
| | Expression::VariableReference(_) | ||
| expr, | ||
| Expression::VariableReference(_) | ||
| | Expression::MemberReference(_) | ||
| ) || self.ty().is_any_reference() | ||
| { | ||
| return; | ||
| | Expression::ImplicitConversion(ImplicitConversion { | ||
| kind: ImplicitConversionKind::Dereference, | ||
| .. | ||
| }) | ||
| ) { | ||
| return None; | ||
| } | ||
|
|
||
| if let Some(clone) = context.clone_for(self.ty()) { | ||
| let mut expr: Expression = Call { | ||
| range: self.range(), | ||
| function: clone, | ||
| generic: None, | ||
| args: vec![], | ||
| } | ||
| .into(); | ||
| std::mem::swap(&mut expr, self); | ||
| match self { | ||
| Expression::Call(call) => { | ||
| call.args.push(expr); | ||
| } | ||
| _ => unreachable!("We've just replaced self with call"), | ||
| let clone = self.context.clone_for(expr.ty())?; | ||
| let mut expr_new: Expression = Call { | ||
| range: expr.range(), | ||
| function: clone, | ||
| generic: None, | ||
| args: vec![], | ||
| } | ||
| .into(); | ||
| std::mem::swap(&mut expr_new, expr); | ||
| match expr { | ||
| Expression::Call(call) => { | ||
| call.args.push(expr_new); | ||
| } | ||
| _ => unreachable!("We've just replaced self with call"), | ||
| } | ||
| Some(()) | ||
| } | ||
|
|
||
| fn exit_variable_data(&mut self, var: &mut VariableData) { | ||
| var.initializer.as_mut().map(|expr| self.clone_expr(expr)); | ||
| } | ||
|
|
||
| fn exit_assignment(&mut self, assignment: &mut Assignment) { | ||
| self.clone_expr(&mut assignment.value); | ||
| } | ||
|
|
||
| fn exit_return(&mut self, ret: &mut Return) { | ||
| ret.value_mut().map(|expr| self.clone_expr(expr)); | ||
| } | ||
|
|
||
| fn exit_initializer(&mut self, init: &mut Initializer) { | ||
| self.clone_expr(&mut init.value); | ||
| } | ||
|
|
||
| fn exit_call(&mut self, call: &mut Call) { | ||
| for arg in &mut call.args { | ||
| self.clone_expr(arg); | ||
| } | ||
| } | ||
| } |
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