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Make Token smaller by boxing LexError.

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This commit is contained in:
Stephen Chung
2020-03-24 09:49:37 +08:00
parent bcab024d22
commit 3677bd3651
2 changed files with 39 additions and 30 deletions
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36
src/optimize.rs
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@@ -591,29 +591,25 @@ pub fn optimize_into_ast(
functions
.into_iter()
.map(|mut fn_def| {
match engine.optimization_level {
OptimizationLevel::None => (),
OptimizationLevel::Simple | OptimizationLevel::Full => {
let pos = fn_def.body.position();
if engine.optimization_level != OptimizationLevel::None {
let pos = fn_def.body.position();
// Optimize the function body
let mut body = optimize(vec![fn_def.body], engine, &Scope::new());
// Optimize the function body
let mut body = optimize(vec![fn_def.body], engine, &Scope::new());
// {} -> Noop
fn_def.body = match body.pop().unwrap_or_else(|| Stmt::Noop(pos)) {
// { return val; } -> val
Stmt::ReturnWithVal(Some(val), ReturnType::Return, _) => {
Stmt::Expr(val)
}
// { return; } -> ()
Stmt::ReturnWithVal(None, ReturnType::Return, pos) => {
Stmt::Expr(Box::new(Expr::Unit(pos)))
}
// All others
stmt => stmt,
};
}
// {} -> Noop
fn_def.body = match body.pop().unwrap_or_else(|| Stmt::Noop(pos)) {
// { return val; } -> val
Stmt::ReturnWithVal(Some(val), ReturnType::Return, _) => Stmt::Expr(val),
// { return; } -> ()
Stmt::ReturnWithVal(None, ReturnType::Return, pos) => {
Stmt::Expr(Box::new(Expr::Unit(pos)))
}
// All others
stmt => stmt,
};
}
Arc::new(fn_def)
})
.collect(),