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// Copyright (C) 2019-2023 Aleo Systems Inc.
// This file is part of the snarkVM library.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at:
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
use super::*;
impl<A: Aleo> Plaintext<A> {
/// Returns the plaintext member from the given path.
pub fn find(&self, path: &[Identifier<A>]) -> Result<Plaintext<A>> {
// Ensure the path is not empty.
if path.is_empty() {
A::halt("Attempted to find member with an empty path.")
}
match self {
// Halts if the value is not a struct.
Self::Literal(..) => A::halt("Literal is not a struct"),
// Retrieve the value of the member (from the value).
Self::Struct(members, ..) => {
// Initialize the members starting from the top-level.
let mut submembers = members;
// Initialize the output.
let mut output = None;
// Iterate through the path to retrieve the value.
for (i, identifier) in path.iter().enumerate() {
// If this is not the last item in the path, ensure the value is a struct.
if i != path.len() - 1 {
match submembers.get(identifier) {
// Halts if the member is not a struct.
Some(Self::Literal(..)) => bail!("'{identifier}' must be a struct"),
// Retrieve the member and update `submembers` for the next iteration.
Some(Self::Struct(members, ..)) => submembers = members,
// Halts if the member does not exist.
None => bail!("Failed to locate member '{identifier}' in struct"),
}
}
// Otherwise, return the final member.
else {
match submembers.get(identifier) {
// Return the plaintext member.
Some(plaintext) => output = Some(plaintext.clone()),
// Halts if the member does not exist.
None => bail!("Failed to locate member '{identifier}' in struct"),
}
}
}
// Return the output.
match output {
Some(output) => Ok(output),
None => A::halt("Failed to locate member in struct from path"),
}
}
}
}
}