77 lines
2.2 KiB
Rust
77 lines
2.2 KiB
Rust
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/* Copyright (C) 2021 Aidan Hahn
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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use crate::segment::{Ctr, Seg};
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use crate::sym::SymTable;
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pub fn bool_and_callback(ast: &Seg, _syms: &mut SymTable) -> Result<Ctr, String> {
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let mut type_error = false;
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let result = ast.circuit(&mut |arg: &Ctr| -> bool {
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if let Ctr::Bool(b) = *arg {
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b
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} else {
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eprintln!("{} is not a boolean", arg);
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type_error = true;
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false
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}
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});
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if type_error {
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Err("all arguments to and must evaluate to boolean".to_string())
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} else {
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Ok(Ctr::Bool(result))
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}
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}
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pub fn bool_or_callback(ast: &Seg, _syms: &mut SymTable) -> Result<Ctr, String> {
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let mut result = false;
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let correct_types = ast.circuit(&mut |arg: &Ctr| -> bool {
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if let Ctr::Bool(b) = *arg {
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result = result || b;
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true
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} else {
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eprintln!("{} is not a boolean", arg);
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false
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}
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});
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if !correct_types {
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Err("all arguments to 'or' must evaluate to boolean".to_string())
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} else {
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Ok(Ctr::Bool(result))
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}
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}
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pub fn bool_xor_callback(_ast: &Seg, _syms: &mut SymTable) -> Result<Ctr, String> {
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todo!()
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}
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pub fn bool_not_callback(ast: &Seg, _syms: &mut SymTable) -> Result<Ctr, String> {
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if let Ctr::Bool(b) = *ast.car {
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Ok(Ctr::Bool(!b))
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} else {
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Err("impossible state: non bool given to not".to_string())
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}
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}
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pub fn bool_iseq_callback(_ast: &Seg, _syms: &mut SymTable) -> Result<Ctr, String> {
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todo!()
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}
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pub fn bool_toggle_callback(_ast: &Seg, _syms: &mut SymTable) -> Result<Ctr, String> {
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todo!()
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}
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