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Move macro check to is_block_closure_forced()

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This commit is contained in:
Seiichi Uchida 2017-12-10 21:49:59 +09:00
parent 812fc4ca56
commit bd6bef8cfa
1 changed files with 14 additions and 9 deletions
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23
src/closures.rs
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@ -81,7 +81,7 @@ fn try_rewrite_without_block(
) -> Option<String> {
let expr = get_inner_expr(expr, prefix, context);
if is_block_closure_forced(expr) {
if is_block_closure_forced(context, expr) {
rewrite_closure_with_block(expr, prefix, context, shape)
} else {
rewrite_closure_expr(expr, prefix, context, body_shape)
@ -107,7 +107,7 @@ fn get_inner_expr<'a>(
// Figure out if a block is necessary.
fn needs_block(block: &ast::Block, prefix: &str, context: &RewriteContext) -> bool {
is_unsafe_block(block) || block.stmts.len() > 1 || context.inside_macro
is_unsafe_block(block) || block.stmts.len() > 1
|| block_contains_comment(block, context.codemap) || prefix.contains('\n')
}
@ -272,15 +272,11 @@ pub fn rewrite_last_closure(
if prefix.contains('\n') {
return None;
}
// If we are inside macro, we do not want to add or remove block from closure body.
if context.inside_macro {
return expr.rewrite(context, shape);
}
let body_shape = shape.offset_left(extra_offset)?;
// We force to use block for the body of the closure for certain kinds of expressions.
if is_block_closure_forced(body) {
if is_block_closure_forced(context, body) {
return rewrite_closure_with_block(body, &prefix, context, body_shape).and_then(
|body_str| {
// If the expression can fit in a single line, we need not force block closure.
@ -332,7 +328,16 @@ where
.count() > 1
}
fn is_block_closure_forced(expr: &ast::Expr) -> bool {
fn is_block_closure_forced(context: &RewriteContext, expr: &ast::Expr) -> bool {
// If we are inside macro, we do not want to add or remove block from closure body.
if context.inside_macro {
false
} else {
is_block_closure_forced_inner(expr)
}
}
fn is_block_closure_forced_inner(expr: &ast::Expr) -> bool {
match expr.node {
ast::ExprKind::If(..)
| ast::ExprKind::IfLet(..)
@ -344,7 +349,7 @@ fn is_block_closure_forced(expr: &ast::Expr) -> bool {
| ast::ExprKind::Box(ref expr)
| ast::ExprKind::Try(ref expr)
| ast::ExprKind::Unary(_, ref expr)
| ast::ExprKind::Cast(ref expr, _) => is_block_closure_forced(expr),
| ast::ExprKind::Cast(ref expr, _) => is_block_closure_forced_inner(expr),
_ => false,
}
}