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/*
* AquaVM Workflow Engine
*
* Copyright (C) 2024 Fluence DAO
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
use super::lexer::LambdaASTLexer;
use super::LambdaParserResult;
use crate::parser::errors::IncorrectLambdaError;
use crate::parser::va_lambda::RawLambdaASTParser;
use crate::Functor;
use crate::LambdaAST;
use crate::ValueAccessor;
// Caching parser to cache internal regexes, which are expensive to instantiate
// See also https://github.com/lalrpop/lalrpop/issues/269
thread_local!(static PARSER: RawLambdaASTParser = RawLambdaASTParser::new());
/// Parse AIR lambda ast to `LambdaAST`
pub fn parse(lambda: &str) -> LambdaParserResult<'_, LambdaAST> {
PARSER.with(|parser| {
let mut errors = Vec::new();
let lexer = LambdaASTLexer::new(lambda);
let result = parser.parse(lambda, &mut errors, lexer);
match result {
Ok(lambda_ast) if errors.is_empty() => lambda_ast.try_into().map_err(Into::into),
Ok(_) => Err(errors.into()),
Err(e) => Err(e.into()),
}
})
}
impl<'input> TryFrom<RawLambdaAST<'input>> for LambdaAST<'input> {
type Error = IncorrectLambdaError;
fn try_from(raw_lambda_ast: RawLambdaAST<'input>) -> Result<Self, Self::Error> {
match raw_lambda_ast {
RawLambdaAST::ValuePath(accessors) => {
LambdaAST::try_from_accessors(accessors).or(Err(IncorrectLambdaError::EmptyLambda))
}
RawLambdaAST::Functor(functor) => Ok(LambdaAST::from_functor(functor)),
RawLambdaAST::Error => Err(IncorrectLambdaError::InternalError),
}
}
}
#[derive(Debug, PartialEq, Eq, Clone)]
pub(crate) enum RawLambdaAST<'input> {
Functor(Functor),
ValuePath(Vec<ValueAccessor<'input>>),
// needed to allow parser catch all errors from a lambda expression without stopping on the very first one.
Error,
}