92 lines
2.4 KiB
Rust
92 lines
2.4 KiB
Rust
use crate::parser::ast::*;
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use crate::forms::*;
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use crate::instructions::*;
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use crate::targets::*;
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use std::cell::Cell;
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pub(crate) trait Allocator {
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fn new() -> Self;
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fn mark_anon_var<'a, Target: CompilationTarget<'a>>(
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&mut self,
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lvl: Level,
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context: GenContext,
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code: &mut CodeDeque,
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);
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fn mark_non_var<'a, Target: CompilationTarget<'a>>(
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&mut self,
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lvl: Level,
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context: GenContext,
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cell: &'a Cell<RegType>,
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code: &mut CodeDeque,
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);
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fn mark_reserved_var<'a, Target: CompilationTarget<'a>>(
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&mut self,
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var_num: usize,
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lvl: Level,
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cell: &'a Cell<VarReg>,
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term_loc: GenContext,
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code: &mut CodeDeque,
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r: RegType,
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is_new_var: bool,
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);
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fn mark_cut_var(&mut self, var_num: usize, chunk_num: usize) -> RegType;
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fn mark_var<'a, Target: CompilationTarget<'a>>(
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&mut self,
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var_num: usize,
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lvl: Level,
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cell: &'a Cell<VarReg>,
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context: GenContext,
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code: &mut CodeDeque,
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);
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fn reset(&mut self);
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fn reset_arg(&mut self, arg_num: usize);
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fn reset_at_head(&mut self, args: &Vec<Term>);
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fn reset_contents(&mut self);
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fn advance_arg(&mut self);
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/*
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fn bindings(&self) -> &AllocVarDict;
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fn bindings_mut(&mut self) -> &mut AllocVarDict;
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fn take_bindings(self) -> AllocVarDict;
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*/
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fn max_reg_allocated(&self) -> usize;
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// TODO: wha.. why?? grrr. it drains the VarStatus data from vs (which it owns!)
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// into self.bindings and perm_vs after all is computed (i.e. vs.populate_restricting_sets()
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// and vs.set_perm_vals(has_deep_cut) have both been called).
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/*
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fn drain_var_data<'a>(
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&mut self,
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vs: VariableFixtures,
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num_of_chunks: usize,
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) -> VariableFixtures {
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let mut perm_vs = VariableFixtures::new();
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for (var, var_status) in vs.into_iter() {
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match var_status {
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VarStatus::Temp(chunk_num, tvd) => {
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self.bindings_mut()
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.insert(var.clone(), VarAlloc::Temp(chunk_num, 0, tvd));
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}
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VarStatus::Perm(_) => {
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self.bindings_mut().insert(var.clone(), VarAlloc::Perm(0));
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perm_vs.insert(var, var_status);
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}
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};
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}
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perm_vs
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}
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*/
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}
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