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Backport syntex update (#5316)

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This commit is contained in:
Nikolay Volf
2017-03-29 11:43:13 +03:00
committed by Arkadiy Paronyan
parent 987390fb7d
commit 7f4e700013
16 changed files with 240 additions and 211 deletions
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37
ipc/codegen/src/serialization.rs
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@@ -151,7 +151,7 @@ fn binary_expr(
_ => {
cx.span_bug(item.span,
"expected ItemStruct or ItemEnum in #[derive(Binary)]");
Err(Error)
Err(Error) as Result<BinaryExpressions, Error>
},
}
}
@@ -184,13 +184,17 @@ fn binary_expr_struct(
let size_exprs: Vec<P<ast::Expr>> = fields.iter().enumerate().map(|(index, field)| {
let raw_ident = ::syntax::print::pprust::ty_to_string(&codegen::strip_ptr(&field.ty));
let index_ident = builder.id(format!("__field{}", index));
let field_id = match field.ident {
Some(ident) => builder.id(ident),
None => builder.id(format!("{}", index)),
};
match raw_ident.as_ref() {
"u8" => {
quote_expr!(cx, 1)
},
"[u8]" => {
value_ident.and_then(|x| {
let field_id = builder.id(field.ident.unwrap());
Some(quote_expr!(cx, $x. $field_id .len()))
})
.unwrap_or_else(|| {
@@ -207,7 +211,6 @@ fn binary_expr_struct(
value_ident.and_then(|x|
{
let field_id = builder.id(field.ident.unwrap());
Some(quote_expr!(cx,
match $field_type_ident_qualified::len_params() {
0 => ::std::mem::size_of::<$field_type_ident>(),
@@ -232,12 +235,12 @@ fn binary_expr_struct(
}
let mut write_stmts = Vec::<ast::Stmt>::new();
write_stmts.push(quote_stmt!(cx, let mut offset = 0usize;).unwrap());
write_stmts.push(quote_stmt!(cx, let mut offset = 0usize;).expect("stmt1"));
let mut map_stmts = Vec::<ast::Stmt>::new();
let field_amount = builder.id(&format!("{}",fields.len()));
map_stmts.push(quote_stmt!(cx, let mut map = vec![0usize; $field_amount];).unwrap());
map_stmts.push(quote_stmt!(cx, let mut total = 0usize;).unwrap());
map_stmts.push(quote_stmt!(cx, let mut map = vec![0usize; $field_amount];).expect("stmt2"));
map_stmts.push(quote_stmt!(cx, let mut total = 0usize;).expect("stmt3"));
let mut post_write_stmts = Vec::<ast::Stmt>::new();
@@ -248,9 +251,12 @@ fn binary_expr_struct(
let field_type_ident_qualified = builder.id(
replace_qualified(&::syntax::print::pprust::ty_to_string(&codegen::strip_ptr(&field.ty))));
let field_id = match field.ident {
Some(ident) => builder.id(ident),
None => builder.id(format!("{}", index)),
};
let member_expr = match value_ident {
Some(x) => {
let field_id = builder.id(field.ident.unwrap());
quote_expr!(cx, $x . $field_id)
},
None => {
@@ -267,8 +273,8 @@ fn binary_expr_struct(
match raw_ident.as_ref() {
"u8" => {
write_stmts.push(quote_stmt!(cx, let next_line = offset + 1;).unwrap());
write_stmts.push(quote_stmt!(cx, buffer[offset] = $member_expr; ).unwrap());
write_stmts.push(quote_stmt!(cx, let next_line = offset + 1;).expect("stmt4"));
write_stmts.push(quote_stmt!(cx, buffer[offset] = $member_expr; ).expect("stm5"));
},
"[u8]" => {
write_stmts.push(quote_stmt!(cx, let size = $member_expr .len();).unwrap());
@@ -374,7 +380,7 @@ fn binary_expr_item_struct(
cx.span_bug(span,
&format!("#[derive(Binary)] Unsupported struct content, expected tuple/struct, found: {:?}",
variant_data));
Err(Error)
Err(Error) as Result<BinaryExpressions, Error>
},
}
}
@@ -431,13 +437,12 @@ fn fields_sequence(
variant_ident: &ast::Ident,
) -> ast::Expr {
use syntax::parse::token;
use syntax::ast::TokenTree::Token;
use syntax::tokenstream::TokenTree::Token;
let named_members = fields.iter().any(|f| f.ident.is_some());
::quasi::parse_expr_panic(&mut ::syntax::parse::new_parser_from_tts(
ext_cx.parse_sess(),
ext_cx.cfg(),
{
let _sp = ext_cx.call_site();
let mut tt = ::std::vec::Vec::new();
@@ -569,11 +574,10 @@ fn named_fields_sequence(
fields: &[ast::StructField],
) -> ast::Stmt {
use syntax::parse::token;
use syntax::ast::TokenTree::Token;
use syntax::tokenstream::TokenTree::Token;
::quasi::parse_stmt_panic(&mut ::syntax::parse::new_parser_from_tts(
ext_cx.parse_sess(),
ext_cx.cfg(),
{
let _sp = ext_cx.call_site();
let mut tt = ::std::vec::Vec::new();
@@ -590,7 +594,10 @@ fn named_fields_sequence(
tt.push(Token(_sp, token::OpenDelim(token::Brace)));
for (idx, field) in fields.iter().enumerate() {
tt.push(Token(_sp, token::Ident(field.ident.clone().expect("function is called for named fields"))));
tt.push(Token(_sp, match field.ident {
Some(ident) => token::Ident(ident),
None => token::Ident(ext_cx.ident_of(&format!("{}", idx))),
}));
tt.push(Token(_sp, token::Colon));
// special case for u8, it just takes byte form sequence