affine/flesh
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

finally figure out how to hold closures

Browse source
This commit is contained in:
Aidan Hahn 2022-01-16 22:01:42 -08:00
parent 69f31db23b
commit f805290a4b
No known key found for this signature in database
GPG key ID: 327711E983899316
8 changed files with 98 additions and 89 deletions
Download patch file Download diff file Expand all files Collapse all files

115
src/vars.rs
View file

@ -21,7 +21,7 @@ use std::collections::HashMap;
use std::env;
use crate::segment::{Ctr, Ast, ast_to_string};
use crate::eval::eval;
use crate::func::{Function, Operation, InternalOperation, Args, FTable};
use crate::func::{Function, Operation, Args, FTable};
/* Mapping between a string token and a tree of Segments
* The string token can be found in any Ctr::Symbol value
* it is expected that the trees stored are already evaluated
@ -40,63 +40,76 @@ pub fn define(
}
pub fn get_export(env_cfg: bool) -> Function {
return Function{
name: String::from("export"),
loose_syms: true,
eval_lazy: true,
args: Args::Lazy(2),
function: Operation::Internal(get_export_callback(env_cfg)),
};
// This is the most hilarious way to work around the lifetime of env_cfg
// TODO: figure out the RUSTEY way of doing this
if env_cfg {
return Function{
name: String::from("export"),
loose_syms: true,
eval_lazy: true,
args: Args::Lazy(2),
function: Operation::Internal(Box::new(|a: Ast, b: Rc<RefCell<VTable>>, c: Rc<RefCell<FTable>>| -> Ctr {
export_callback(true, a, b, c)
})),
};
} else {
return Function{
name: String::from("export"),
loose_syms: true,
eval_lazy: true,
args: Args::Lazy(2),
function: Operation::Internal(Box::new(|a: Ast, b: Rc<RefCell<VTable>>, c: Rc<RefCell<FTable>>| -> Ctr {
export_callback(false, a, b, c)
})),
};
}
}
fn get_export_callback(env_cfg: bool) -> InternalOperation {
InternalOperation(|a: Ast, b: Rc<RefCell<VTable>>, c: Rc<RefCell<FTable>>| -> Ctr {
let inner = a.borrow_mut();
match &inner.car {
Ctr::Symbol(identifier) => {
match &inner.cdr {
Ctr::Seg(tree) => {
match eval(tree.clone(), b.clone(), c.clone(), false) {
Ok(seg) => {
match seg {
Ctr::Seg(val) => {
let val_tmp = val.borrow().clone();
define(b, identifier.to_string(), Rc::new(val_tmp.car));
if env_cfg {
match val_tmp.car {
Ctr::Symbol(s) => env::set_var(identifier, s),
Ctr::String(s) => env::set_var(identifier, s),
Ctr::Integer(i) => env::set_var(identifier, format!("{}", i)),
Ctr::Float(f) => env::set_var(identifier, format!("{}", f)),
Ctr::Bool(b) => env::set_var(identifier, format!("{}", b)),
Ctr::Seg(c) => env::set_var(identifier, ast_to_string(c)),
Ctr::None => ()
}
fn export_callback(env_cfg: bool, a: Ast, b: Rc<RefCell<VTable>>, c: Rc<RefCell<FTable>>) -> Ctr{
let inner = a.borrow_mut();
match &inner.car {
Ctr::Symbol(identifier) => {
match &inner.cdr {
Ctr::Seg(tree) => {
match eval(tree.clone(), b.clone(), c.clone(), false) {
Ok(seg) => {
match seg {
Ctr::Seg(val) => {
define(b, identifier.to_string(), Rc::new(val.borrow().clone().car));
if env_cfg {
match val.borrow().clone().car {
Ctr::Symbol(s) => env::set_var(identifier, s),
Ctr::String(s) => env::set_var(identifier, s),
Ctr::Integer(i) => env::set_var(identifier, format!("{}", i)),
Ctr::Float(f) => env::set_var(identifier, format!("{}", f)),
Ctr::Bool(b) => env::set_var(identifier, format!("{}", b)),
Ctr::Seg(c) => env::set_var(identifier, ast_to_string(c)),
Ctr::None => ()
}
},
}
},
_ => eprintln!("impossible args to export")
}
},
_ => eprintln!("impossible args to export")
}
},
Err(e) => eprintln!("couldnt eval symbol: {}", e)
}
},
Err(e) => eprintln!("couldnt eval symbol: {}", e)
}
},
Ctr::None => {
(*b).borrow_mut().remove(identifier);
if env_cfg {
// TODO: unset variable
}
},
Ctr::None => {
(*b).borrow_mut().remove(identifier);
if env_cfg {
// TODO: unset variable
}
},
_ => eprintln!("args not in standard form")
}
},
_ => eprintln!("args not in standard form")
}
},
_ => eprintln!("first argument to export must be a symbol")
}
_ => eprintln!("first argument to export must be a symbol")
}
return Ctr::None;
})
return Ctr::None;
}