pub mod ast;
pub mod parse {
#![allow(unused_braces)]
#![allow(unused_comparisons)] #![allow(clippy::collapsible_if)]
#![allow(clippy::if_same_then_else)]
#![allow(clippy::absurd_extreme_comparisons)] #![allow(clippy::needless_return)]
#![allow(clippy::upper_case_acronyms)]
#![allow(clippy::manual_range_patterns)]
include!(concat!(env!("OUT_DIR"), "/parse.rs"));
}
use crate::dialect::Token;
use ast::{Cmd, ExplainKind, Name, Stmt};
#[derive(Debug, PartialEq)]
pub enum ParserError {
SyntaxError {
token_type: &'static str,
found: Option<String>,
},
UnexpectedEof,
Custom(String),
}
impl std::fmt::Display for ParserError {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
match self {
ParserError::SyntaxError { token_type, found } => {
write!(f, "near {}, \"{:?}\": syntax error", token_type, found)
}
ParserError::UnexpectedEof => f.write_str("unexpected end of input"),
ParserError::Custom(s) => f.write_str(s),
}
}
}
impl std::error::Error for ParserError {}
#[macro_export]
macro_rules! custom_err {
($msg:literal $(,)?) => {
$crate::parser::ParserError::Custom($msg.to_owned())
};
($err:expr $(,)?) => {
$crate::parser::ParserError::Custom(format!($err))
};
($fmt:expr, $($arg:tt)*) => {
$crate::parser::ParserError::Custom(format!($fmt, $($arg)*))
};
}
pub struct Context<'input> {
input: &'input [u8],
explain: Option<ExplainKind>,
stmt: Option<Stmt>,
constraint_name: Option<Name>, module_arg: Option<(usize, usize)>, module_args: Option<Vec<String>>, done: bool,
error: Option<ParserError>,
}
impl<'input> Context<'input> {
pub fn new(input: &'input [u8]) -> Context<'input> {
Context {
input,
explain: None,
stmt: None,
constraint_name: None,
module_arg: None,
module_args: None,
done: false,
error: None,
}
}
pub fn cmd(&mut self) -> Option<Cmd> {
if let Some(stmt) = self.stmt.take() {
match self.explain.take() {
Some(ExplainKind::Explain) => Some(Cmd::Explain(stmt)),
Some(ExplainKind::QueryPlan) => Some(Cmd::ExplainQueryPlan(stmt)),
None => Some(Cmd::Stmt(stmt)),
}
} else {
None
}
}
fn constraint_name(&mut self) -> Option<Name> {
self.constraint_name.take()
}
fn no_constraint_name(&self) -> bool {
self.constraint_name.is_none()
}
fn vtab_arg_init(&mut self) {
self.add_module_arg();
self.module_arg = None;
}
fn vtab_arg_extend(&mut self, any: Token) {
if let Some((_, ref mut n)) = self.module_arg {
*n = any.2
} else {
self.module_arg = Some((any.0, any.2))
}
}
fn add_module_arg(&mut self) {
if let Some((start, end)) = self.module_arg.take() {
if let Ok(arg) = std::str::from_utf8(&self.input[start..end]) {
self.module_args.get_or_insert(vec![]).push(arg.to_owned());
} }
}
fn module_args(&mut self) -> Option<Vec<String>> {
self.add_module_arg();
self.module_args.take()
}
fn sqlite3_finish_coding(&mut self) {
self.done = true;
}
pub fn done(&self) -> bool {
self.done || self.error.is_some()
}
pub fn is_ok(&self) -> bool {
self.error.is_none()
}
pub fn error(&mut self) -> Option<ParserError> {
self.error.take()
}
pub fn reset(&mut self) {
self.explain = None;
self.stmt = None;
self.constraint_name = None;
self.module_arg = None;
self.module_args = None;
self.done = false;
self.error = None;
}
}