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Add no_float feature to disable floating-point.

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This commit is contained in:
Stephen Chung
2020-03-10 18:32:01 +08:00
parent 52b5732bcb
commit cc772c6e2a
6 changed files with 206 additions and 125 deletions
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8
src/optimize.rs
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@@ -112,7 +112,6 @@ fn optimize_stmt(stmt: Stmt, changed: &mut bool) -> Stmt {
fn optimize_expr(expr: Expr, changed: &mut bool) -> Expr {
match expr {
Expr::IntegerConstant(_, _)
| Expr::FloatConstant(_, _)
| Expr::Identifier(_, _)
| Expr::CharConstant(_, _)
| Expr::StringConstant(_, _)
@@ -120,6 +119,9 @@ fn optimize_expr(expr: Expr, changed: &mut bool) -> Expr {
| Expr::False(_)
| Expr::Unit(_) => expr,
#[cfg(not(feature = "no_float"))]
Expr::FloatConstant(_, _) => expr,
Expr::Stmt(stmt, pos) => match optimize_stmt(*stmt, changed) {
Stmt::Noop(_) => {
*changed = true;
@@ -144,9 +146,9 @@ fn optimize_expr(expr: Expr, changed: &mut bool) -> Expr {
(Expr::Array(mut items, _), Expr::IntegerConstant(i, _))
if i >= 0
&& (i as usize) < items.len()
&& !items.iter().any(|x| x.is_constant()) =>
&& !items.iter().any(|x| x.is_constant() || x.is_identifier()) =>
{
// Array where everything is a constant - promote the item
// Array where everything is a constant or identifier - promote the item
*changed = true;
items.remove(i as usize)
}