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Implement procedural macro to derive {To,From}Sql traits

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With this macro it is possible to #[derive(ToSql, FromSql)] for enums, that do
not contain data (C-style).
This commit is contained in:
Dmitry Bogatov
2019-08-10 17:44:39 +00:00
parent 24b025f573
commit ed66f36cb5
5 changed files with 72 additions and 38 deletions
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40
src/constants.rs
View File

@@ -1,13 +1,11 @@
//! Constants
#![allow(non_camel_case_types)]
use num_traits::{FromPrimitive, ToPrimitive};
use rusqlite as sql;
use rusqlite::types::*;
use deltachat_derive::*;
pub const DC_VERSION_STR: &'static [u8; 14] = b"1.0.0-alpha.3\x00";
#[repr(u8)]
#[derive(Debug, Display, Clone, Copy, PartialEq, Eq, FromPrimitive, ToPrimitive)]
#[derive(Debug, Display, Clone, Copy, PartialEq, Eq, FromPrimitive, ToPrimitive, ToSql, FromSql)]
pub enum MoveState {
Undefined = 0,
Pending = 1,
@@ -15,21 +13,6 @@ pub enum MoveState {
Moving = 3,
}
impl ToSql for MoveState {
fn to_sql(&self) -> sql::Result<ToSqlOutput> {
let num = *self as i64;
Ok(ToSqlOutput::Owned(Value::Integer(num)))
}
}
impl FromSql for MoveState {
fn column_result(col: ValueRef) -> FromSqlResult<Self> {
let inner = FromSql::column_result(col)?;
FromPrimitive::from_i64(inner).ok_or(FromSqlError::InvalidType)
}
}
pub const DC_GCL_ARCHIVED_ONLY: usize = 0x01;
pub const DC_GCL_NO_SPECIALS: usize = 0x02;
pub const DC_GCL_ADD_ALLDONE_HINT: usize = 0x04;
@@ -166,7 +149,7 @@ pub const DC_LP_IMAP_SOCKET_FLAGS: usize =
pub const DC_LP_SMTP_SOCKET_FLAGS: usize =
(DC_LP_SMTP_SOCKET_STARTTLS | DC_LP_SMTP_SOCKET_SSL | DC_LP_SMTP_SOCKET_PLAIN);
#[derive(Debug, Display, Clone, Copy, PartialEq, Eq, FromPrimitive, ToPrimitive)]
#[derive(Debug, Display, Clone, Copy, PartialEq, Eq, FromPrimitive, ToPrimitive, FromSql, ToSql)]
#[repr(i32)]
pub enum Viewtype {
Unknown = 0,
@@ -221,23 +204,6 @@ mod tests {
}
}
impl ToSql for Viewtype {
fn to_sql(&self) -> sql::Result<ToSqlOutput> {
let num: i64 = self
.to_i64()
.expect("impossible: Viewtype -> i64 conversion failed");
Ok(ToSqlOutput::Owned(Value::Integer(num)))
}
}
impl FromSql for Viewtype {
fn column_result(col: ValueRef) -> FromSqlResult<Self> {
let inner = FromSql::column_result(col)?;
FromPrimitive::from_i64(inner).ok_or(FromSqlError::InvalidType)
}
}
// These constants are used as events
// reported to the callback given to dc_context_new().
// If you do not want to handle an event, it is always safe to return 0,