Fix missing docs

src/config.rs

@@ -6,33 +6,55 @@ use crate::ffi;
 use crate::{Connection, Result};
 
 /// Database Connection Configuration Options
+/// See [Database Connection Configuration Options](https://sqlite.org/c3ref/c_dbconfig_enable_fkey.html) for details.
 #[repr(i32)]
 #[allow(non_snake_case, non_camel_case_types)]
 #[non_exhaustive]
 pub enum DbConfig {
     //SQLITE_DBCONFIG_MAINDBNAME = 1000, /* const char* */
     //SQLITE_DBCONFIG_LOOKASIDE = 1001,  /* void* int int */
+    /// Enable or disable the enforcement of foreign key constraints.
     SQLITE_DBCONFIG_ENABLE_FKEY = 1002,
+    /// Enable or disable triggers.
     SQLITE_DBCONFIG_ENABLE_TRIGGER = 1003,
+    /// Enable or disable the fts3_tokenizer() function which is part of the
+    /// FTS3 full-text search engine extension.
     SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER = 1004, // 3.12.0
     //SQLITE_DBCONFIG_ENABLE_LOAD_EXTENSION = 1005,
+    /// In WAL mode, enable or disable the checkpoint operation before closing
+    /// the connection.
     SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE = 1006, // 3.16.2
-    SQLITE_DBCONFIG_ENABLE_QPSG = 1007,      // 3.20.0
+    /// Activates or deactivates the query planner stability guarantee (QPSG).
-    SQLITE_DBCONFIG_TRIGGER_EQP = 1008,      // 3.22.0
+    SQLITE_DBCONFIG_ENABLE_QPSG = 1007, // 3.20.0
+    /// Includes or excludes output for any operations performed by trigger
+    /// programs from the output of EXPLAIN QUERY PLAN commands.
+    SQLITE_DBCONFIG_TRIGGER_EQP = 1008, // 3.22.0
     //SQLITE_DBCONFIG_RESET_DATABASE = 1009,
+    /// Activates or deactivates the "defensive" flag for a database connection.
     SQLITE_DBCONFIG_DEFENSIVE = 1010, // 3.26.0
+    /// Activates or deactivates the "writable_schema" flag.
     #[cfg(feature = "modern_sqlite")]
     SQLITE_DBCONFIG_WRITABLE_SCHEMA = 1011, // 3.28.0
+    /// Activates or deactivates the legacy behavior of the ALTER TABLE RENAME
+    /// command.
     #[cfg(feature = "modern_sqlite")]
     SQLITE_DBCONFIG_LEGACY_ALTER_TABLE = 1012, // 3.29
+    /// Activates or deactivates the legacy double-quoted string literal
+    /// misfeature for DML statements only.
     #[cfg(feature = "modern_sqlite")]
     SQLITE_DBCONFIG_DQS_DML = 1013, // 3.29.0
+    /// Activates or deactivates the legacy double-quoted string literal
+    /// misfeature for DDL statements.
     #[cfg(feature = "modern_sqlite")]
     SQLITE_DBCONFIG_DQS_DDL = 1014, // 3.29.0
+    /// Enable or disable views.
     #[cfg(feature = "modern_sqlite")]
     SQLITE_DBCONFIG_ENABLE_VIEW = 1015, // 3.30.0
+    /// Activates or deactivates the legacy file format flag.
     #[cfg(feature = "modern_sqlite")]
     SQLITE_DBCONFIG_LEGACY_FILE_FORMAT = 1016, // 3.31.0
+    /// Tells SQLite to assume that database schemas (the contents of the
+    /// sqlite_master tables) are untainted by malicious content.
     #[cfg(feature = "modern_sqlite")]
     SQLITE_DBCONFIG_TRUSTED_SCHEMA = 1017, // 3.31.0
 }

src/error.rs

@@ -94,6 +94,7 @@ pub enum Error {
     #[allow(dead_code)]
     ModuleError(String),
 
+    /// An unwinding panic occurs in an UDF (user-defined function).
     #[cfg(feature = "functions")]
     UnwindingPanic,
 

src/functions.rs

@@ -267,17 +267,26 @@ where
 }
 
 bitflags::bitflags! {
-    #[doc = "Function Flags."]
+    /// Function Flags.
-    #[doc = "See [sqlite3_create_function](https://sqlite.org/c3ref/create_function.html) for details."]
+    /// See [sqlite3_create_function](https://sqlite.org/c3ref/create_function.html)
+    /// and [Function Flags](https://sqlite.org/c3ref/c_deterministic.html) for details.
     #[repr(C)]
     pub struct FunctionFlags: ::std::os::raw::c_int {
+        /// Specifies UTF-8 as the text encoding this SQL function prefers for its parameters.
         const SQLITE_UTF8     = ffi::SQLITE_UTF8;
+        /// Specifies UTF-16 using little-endian byte order as the text encoding this SQL function prefers for its parameters.
         const SQLITE_UTF16LE  = ffi::SQLITE_UTF16LE;
+        /// Specifies UTF-16 using big-endian byte order as the text encoding this SQL function prefers for its parameters.
         const SQLITE_UTF16BE  = ffi::SQLITE_UTF16BE;
+        /// Specifies UTF-16 using native byte order as the text encoding this SQL function prefers for its parameters.
         const SQLITE_UTF16    = ffi::SQLITE_UTF16;
+        /// Means that the function always gives the same output when the input parameters are the same.
         const SQLITE_DETERMINISTIC = ffi::SQLITE_DETERMINISTIC;
+        /// Means that the function may only be invoked from top-level SQL.
         const SQLITE_DIRECTONLY    = 0x0000_0008_0000; // 3.30.0
+        /// Indicates to SQLite that a function may call `sqlite3_value_subtype()` to inspect the sub-types of its arguments.
         const SQLITE_SUBTYPE       = 0x0000_0010_0000; // 3.30.0
+        /// Means that the function is unlikely to cause problems even if misused.
         const SQLITE_INNOCUOUS     = 0x0000_0020_0000; // 3.31.0
     }
 }

src/hooks.rs

@@ -14,9 +14,13 @@ use crate::{Connection, InnerConnection};
 #[repr(i32)]
 #[non_exhaustive]
 pub enum Action {
+    /// Unsupported / unexpected action
     UNKNOWN = -1,
+    /// DELETE command
     SQLITE_DELETE = ffi::SQLITE_DELETE,
+    /// INSERT command
     SQLITE_INSERT = ffi::SQLITE_INSERT,
+    /// UPDATE command
     SQLITE_UPDATE = ffi::SQLITE_UPDATE,
 }
 

src/lib.rs

@@ -53,7 +53,7 @@
 //!     Ok(())
 //! }
 //! ```
-#![allow(unknown_lints)]
+#![warn(missing_docs)]
 
 pub use libsqlite3_sys as ffi;
 
@@ -806,19 +806,32 @@ impl fmt::Debug for Connection {
 }
 
 bitflags::bitflags! {
-    #[doc = "Flags for opening SQLite database connections."]
+    /// Flags for opening SQLite database connections.
-    #[doc = "See [sqlite3_open_v2](http://www.sqlite.org/c3ref/open.html) for details."]
+    /// See [sqlite3_open_v2](http://www.sqlite.org/c3ref/open.html) for details.
     #[repr(C)]
     pub struct OpenFlags: ::std::os::raw::c_int {
+        /// The database is opened in read-only mode.
+        /// If the database does not already exist, an error is returned.
         const SQLITE_OPEN_READ_ONLY     = ffi::SQLITE_OPEN_READONLY;
+        /// The database is opened for reading and writing if possible,
+        /// or reading only if the file is write protected by the operating system.
+        /// In either case the database must already exist, otherwise an error is returned.
         const SQLITE_OPEN_READ_WRITE    = ffi::SQLITE_OPEN_READWRITE;
+        /// The database is created if it does not already exist
         const SQLITE_OPEN_CREATE        = ffi::SQLITE_OPEN_CREATE;
+        /// The filename can be interpreted as a URI if this flag is set.
         const SQLITE_OPEN_URI           = 0x0000_0040;
+        /// The database will be opened as an in-memory database.
         const SQLITE_OPEN_MEMORY        = 0x0000_0080;
+        /// The new database connection will use the "multi-thread" threading mode.
         const SQLITE_OPEN_NO_MUTEX      = ffi::SQLITE_OPEN_NOMUTEX;
+        /// The new database connection will use the "serialized" threading mode.
         const SQLITE_OPEN_FULL_MUTEX    = ffi::SQLITE_OPEN_FULLMUTEX;
+        /// The database is opened shared cache enabled.
         const SQLITE_OPEN_SHARED_CACHE  = 0x0002_0000;
+        /// The database is opened shared cache disabled.
         const SQLITE_OPEN_PRIVATE_CACHE = 0x0004_0000;
+        /// The database filename is not allowed to be a symbolic link.
         const SQLITE_OPEN_NOFOLLOW = 0x0100_0000;
     }
 }

src/row.rs

@@ -35,6 +35,8 @@ impl<'stmt> Rows<'stmt> {
         Ok((*self).get())
     }
 
+    /// Map over this `Rows`, converting it to a [`Map`], which
+    /// implements `FallibleIterator`.
     pub fn map<F, B>(self, f: F) -> Map<'stmt, F>
     where
         F: FnMut(&Row<'_>) -> Result<B>,

src/transaction.rs

@@ -6,8 +6,14 @@ use std::ops::Deref;
 #[derive(Copy, Clone)]
 #[non_exhaustive]
 pub enum TransactionBehavior {
+    /// DEFERRED means that the transaction does not actually start until the
+    /// database is first accessed.
     Deferred,
+    /// IMMEDIATE cause the database connection to start a new write
+    /// immediately, without waiting for a writes statement.
     Immediate,
+    /// EXCLUSIVE prevents other database connections from reading the database
+    /// while the transaction is underway.
     Exclusive,
 }
 

src/types/from_sql.rs

@@ -86,6 +86,7 @@ pub type FromSqlResult<T> = Result<T, FromSqlError>;
 /// fetching values as i64 and then doing the interpretation themselves or by
 /// defining a newtype and implementing `FromSql`/`ToSql` for it.
 pub trait FromSql: Sized {
+    /// Converts SQLite value into Rust value.
     fn column_result(value: ValueRef<'_>) -> FromSqlResult<Self>;
 }
 

src/types/mod.rs

@@ -82,12 +82,19 @@ mod value_ref;
 #[derive(Copy, Clone)]
 pub struct Null;
 
+/// SQLite data types.
+/// See [Fundamental Datatypes](https://sqlite.org/c3ref/c_blob.html).
 #[derive(Clone, Debug, PartialEq)]
 pub enum Type {
+    /// NULL
     Null,
+    /// 64-bit signed integer
     Integer,
+    /// 64-bit IEEE floating point number
     Real,
+    /// String
     Text,
+    /// BLOB
     Blob,
 }
 

src/types/to_sql.rs

@@ -87,6 +87,7 @@ impl ToSql for ToSqlOutput<'_> {
 
 /// A trait for types that can be converted into SQLite values.
 pub trait ToSql {
+    /// Converts Rust value to SQLite value
     fn to_sql(&self) -> Result<ToSqlOutput<'_>>;
 }
 

src/types/value.rs

@@ -109,6 +109,7 @@ where
 }
 
 impl Value {
+    /// Returns SQLite fundamental datatype.
     pub fn data_type(&self) -> Type {
         match *self {
             Value::Null => Type::Null,

src/types/value_ref.rs

@@ -20,6 +20,7 @@ pub enum ValueRef<'a> {
 }
 
 impl ValueRef<'_> {
+    /// Returns SQLite fundamental datatype.
     pub fn data_type(&self) -> Type {
         match *self {
             ValueRef::Null => Type::Null,

src/vtab/array.rs

@@ -46,6 +46,7 @@ pub(crate) unsafe extern "C" fn free_array(p: *mut c_void) {
     let _: Array = Rc::from_raw(p as *const Vec<Value>);
 }
 
+/// Array parameter / pointer
 pub type Array = Rc<Vec<Value>>;
 
 impl ToSql for Array {

src/vtab/mod.rs

@@ -205,7 +205,9 @@ impl VTabConnection {
 ///
 /// (See [SQLite doc](https://sqlite.org/c3ref/vtab.html))
 pub unsafe trait VTab: Sized {
+    /// Client data passed to `Connection::create_module`.
     type Aux;
+    /// Specific cursor implementation
     type Cursor: VTabCursor;
 
     /// Establish a new connection to an existing virtual table.
@@ -256,8 +258,9 @@ pub trait CreateVTab: VTab {
 }
 
 /// `feature = "vtab"` Index constraint operator.
+/// See [Virtual Table Constraint Operator Codes](https://sqlite.org/c3ref/c_index_constraint_eq.html) for details.
 #[derive(Debug, PartialEq)]
-#[allow(non_snake_case, non_camel_case_types)]
+#[allow(non_snake_case, non_camel_case_types, missing_docs)]
 #[non_exhaustive]
 pub enum IndexConstraintOp {
     SQLITE_INDEX_CONSTRAINT_EQ,
@@ -329,6 +332,7 @@ impl IndexInfo {
         unsafe { (*self.0).nOrderBy as usize }
     }
 
+    /// Information about what parameters to pass to `VTabCursor.filter`.
     pub fn constraint_usage(&mut self, constraint_idx: usize) -> IndexConstraintUsage<'_> {
         let constraint_usages = unsafe {
             slice::from_raw_parts_mut((*self.0).aConstraintUsage, (*self.0).nConstraint as usize)
@@ -495,6 +499,7 @@ pub unsafe trait VTabCursor: Sized {
 pub struct Context(*mut ffi::sqlite3_context);
 
 impl Context {
+    /// Set current cell value
     pub fn set_result<T: ToSql>(&mut self, value: &T) -> Result<()> {
         let t = value.to_sql()?;
         unsafe { set_result(self.0, &t) };
@@ -511,14 +516,17 @@ pub struct Values<'a> {
 }
 
 impl Values<'_> {
+    /// Returns the number of values.
     pub fn len(&self) -> usize {
         self.args.len()
     }
 
+    /// Returns `true` if there is no value.
     pub fn is_empty(&self) -> bool {
         self.args.is_empty()
     }
 
+    /// Returns value at `idx`
     pub fn get<T: FromSql>(&self, idx: usize) -> Result<T> {
         let arg = self.args[idx];
         let value = unsafe { ValueRef::from_value(arg) };
@@ -558,6 +566,7 @@ impl Values<'_> {
         }
     }
 
+    /// Turns `Values` into an iterator.
     pub fn iter(&self) -> ValueIter<'_> {
         ValueIter {
             iter: self.args.iter(),
@@ -574,6 +583,7 @@ impl<'a> IntoIterator for &'a Values<'a> {
     }
 }
 
+/// `Values` iterator.
 pub struct ValueIter<'a> {
     iter: slice::Iter<'a, *mut ffi::sqlite3_value>,
 }