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Make macro more advanced, to be able to impl Store::save_{as,to}() interfaces

This commit is contained in:
Matthias Beyer 2017-01-21 19:36:53 +01:00
parent d047b6663b
commit 551b135436
1 changed files with 41 additions and 2 deletions
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43
libimagruby/src/store.rs
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@ -72,6 +72,27 @@ macro_rules! call_on_store_by_handle {
}
macro_rules! call_on_store {
($itself:ident ($wrapper:ident) -> $name:ident fetch $fle_handle_name:ident -> $fle_name:ident -> $operation:block) => {{
call_on_store!($itself ($wrapper) -> $name fetch $fle_handle_name -> $fle_name -> $operation on fail return NilClass::new())
}};
($itself:ident ($wrapper:ident) -> $name:ident fetch $fle_handle_name:ident -> $fle_name:ident -> $operation:block on fail return $ex:expr) => {{
let handle = $itself.get_data(&*$wrapper);
call_on_store_by_handle!(handle -> $name -> {
let $fle_name = match $name.get($fle_handle_name) {
Ok(Some(fle)) => fle,
Ok(None) => {
VM::raise(Class::from_existing("RuntimeError"), "Obj does not exist");
return $ex
},
Err(e) => {
VM::raise(Class::from_existing("RuntimeError"), e.description());
return $ex
},
};
$operation
} on fail return $ex)
}};
($itself:ident ($wrapper:ident) -> $name:ident -> $operation:block on fail return $ex:expr) => {{
let handle = $itself.get_data(&*$wrapper);
call_on_store_by_handle!(handle -> $name -> $operation on fail return $ex)
@ -162,7 +183,16 @@ methods!(
// On error: Nil + Exception
//
fn save_to(fle: RFileLockEntry, sid: RStoreId) -> NilClass {
unimplemented!()
let fle = typecheck!(fle).unwrap().clone();
let sid = typecheck!(sid).unwrap().clone();
call_on_store!(itself (STORE_WRAPPER) -> store fetch fle -> real_fle -> {
if let Err(e) = store.save_to(&real_fle, sid) {
trace_error(&e);
VM::raise(Class::from_existing("RuntimeError"), e.description());
}
NilClass::new()
} on fail return NilClass::new())
}
// Save a FileLockEntry in a new path inside the store, move the RFileLockEntry
@ -173,7 +203,16 @@ methods!(
// On error: Nil + Exception
//
fn save_as(fle: RFileLockEntry, sid: RStoreId) -> NilClass {
unimplemented!()
let fle = typecheck!(fle).unwrap().clone();
let sid = typecheck!(sid).unwrap().clone();
call_on_store!(itself (STORE_WRAPPER) -> store fetch fle -> real_fle -> {
if let Err(e) = store.save_as(real_fle, sid) {
trace_error(&e);
VM::raise(Class::from_existing("RuntimeError"), e.description());
}
NilClass::new()
} on fail return NilClass::new())
}
// Move one entry in the store to another place, by its ID