370 lines
12 KiB
Rust
370 lines
12 KiB
Rust
use prolog_parser::ast::*;
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use prolog_parser::tabled_rc::*;
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use crate::prolog::forms::*;
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use crate::prolog::machine::code_repo::*;
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use crate::prolog::machine::machine_errors::*;
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use crate::prolog::machine::machine_indices::*;
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use std::collections::VecDeque;
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use std::mem;
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// Module's and related types are defined in forms.
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impl Module {
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pub fn new(
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module_decl: ModuleDecl,
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atom_tbl: TabledData<Atom>,
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listing_src: ListingSource,
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) -> Self
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{
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Module {
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atom_tbl,
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module_decl,
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term_dir: TermDir::new(),
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user_term_expansions: (Predicate::new(), VecDeque::from(vec![])),
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user_goal_expansions: (Predicate::new(), VecDeque::from(vec![])),
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term_expansions: (Predicate::new(), VecDeque::from(vec![])),
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goal_expansions: (Predicate::new(), VecDeque::from(vec![])),
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local_term_expansions: (Predicate::new(), VecDeque::from(vec![])),
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local_goal_expansions: (Predicate::new(), VecDeque::from(vec![])),
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code_dir: CodeDir::new(),
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op_dir: default_op_dir(),
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inserted_expansions: false,
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is_impromptu_module: false,
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listing_src,
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}
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}
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pub fn dump_expansions(
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&self,
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code_repo: &mut CodeRepo,
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) -> Result<(), ParserError> {
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{
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let te = code_repo
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.term_dir
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.entry((clause_name!("term_expansion"), 2))
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.or_insert((Predicate::new(), VecDeque::from(vec![])));
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(te.0)
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.0
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.extend((self.user_term_expansions.0).0.iter().cloned());
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te.1.extend(self.user_term_expansions.1.iter().cloned());
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}
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{
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let ge = code_repo
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.term_dir
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.entry((clause_name!("goal_expansion"), 2))
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.or_insert((Predicate::new(), VecDeque::from(vec![])));
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(ge.0)
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.0
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.extend((self.user_goal_expansions.0).0.iter().cloned());
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ge.1.extend(self.user_goal_expansions.1.iter().cloned());
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}
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code_repo.compile_hook(CompileTimeHook::TermExpansion)?;
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code_repo.compile_hook(CompileTimeHook::GoalExpansion)?;
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Ok(())
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}
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pub fn add_expansion_record(
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&mut self,
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hook: CompileTimeHook,
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clause: PredicateClause,
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queue: VecDeque<TopLevel>,
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) {
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match hook {
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CompileTimeHook::TermExpansion | CompileTimeHook::UserTermExpansion => {
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(self.term_expansions.0).0.push(clause);
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self.term_expansions.1.extend(queue.into_iter());
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}
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CompileTimeHook::GoalExpansion | CompileTimeHook::UserGoalExpansion => {
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(self.goal_expansions.0).0.push(clause);
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self.goal_expansions.1.extend(queue.into_iter());
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}
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}
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}
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pub fn add_local_expansion(
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&mut self,
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hook: CompileTimeHook,
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clause: PredicateClause,
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queue: VecDeque<TopLevel>,
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) {
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match hook {
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CompileTimeHook::TermExpansion => {
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(self.local_term_expansions.0).0.push(clause);
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self.local_term_expansions.1.extend(queue.into_iter());
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}
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CompileTimeHook::GoalExpansion => {
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(self.local_goal_expansions.0).0.push(clause);
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self.local_goal_expansions.1.extend(queue.into_iter());
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}
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_ => {}
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}
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}
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pub fn take_local_expansions(&mut self) -> Vec<(Predicate, VecDeque<TopLevel>)>
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{
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let term_expansions =
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mem::replace(&mut self.local_term_expansions, (Predicate::new(), VecDeque::new()));
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let goal_expansions =
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mem::replace(&mut self.local_goal_expansions, (Predicate::new(), VecDeque::new()));
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vec![term_expansions, goal_expansions]
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}
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}
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pub trait SubModuleUser {
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fn atom_tbl(&self) -> TabledData<Atom>;
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fn op_dir(&mut self) -> &mut OpDir;
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fn remove_code_index(&mut self, _: PredicateKey);
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fn get_code_index(&self, _: PredicateKey, _: ClauseName) -> Option<CodeIndex>;
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fn insert_dir_entry(&mut self, _: ClauseName, _: usize, _: CodeIndex);
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fn get_op_module_name(&mut self, name: ClauseName, fixity: Fixity) -> Option<ClauseName> {
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self.op_dir()
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.get(&(name, fixity))
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.map(|op_val| op_val.owning_module())
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}
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fn remove_module(&mut self, mod_name: ClauseName, module: &Module) {
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for export in module.module_decl.exports.iter().cloned() {
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match export {
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ModuleExport::PredicateKey((name, arity)) => {
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let name = name.defrock_brackets();
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match self.get_code_index((name.clone(), arity), mod_name.clone()) {
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Some(CodeIndex(ref code_idx)) => {
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if &code_idx.borrow().1 != &module.module_decl.name {
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continue;
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}
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self.remove_code_index((name.clone(), arity));
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// remove or respecify ops.
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if arity == 2 {
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if let Some(mod_name) = self.get_op_module_name(name.clone(), Fixity::In) {
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if mod_name == module.module_decl.name {
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self.op_dir().remove(&(name.clone(), Fixity::In));
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}
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}
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} else if arity == 1 {
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if let Some(mod_name) = self.get_op_module_name(name.clone(), Fixity::Pre) {
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if mod_name == module.module_decl.name {
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self.op_dir().remove(&(name.clone(), Fixity::Pre));
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}
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}
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if let Some(mod_name) = self.get_op_module_name(name.clone(), Fixity::Post)
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{
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if mod_name == module.module_decl.name {
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self.op_dir().remove(&(name.clone(), Fixity::Post));
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}
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}
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}
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}
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_ => {}
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};
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},
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ModuleExport::OpDecl(op_decl) => {
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let op_dir = self.op_dir();
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op_dir.remove(&(op_decl.name(), op_decl.fixity()));
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}
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}
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}
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}
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// returns true on successful import.
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fn import_decl(&mut self, name: ClauseName, arity: usize, submodule: &Module) -> bool {
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let name = name.defrock_brackets();
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if let Some(code_data) = submodule.code_dir.get(&(name.clone(), arity)) {
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let name = name.with_table(submodule.atom_tbl.clone());
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let atom_tbl = self.atom_tbl();
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atom_tbl.borrow_mut().insert(name.to_rc());
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self.insert_dir_entry(name, arity, code_data.clone());
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true
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} else {
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submodule.is_impromptu_module
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}
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}
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fn use_qualified_module(
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&mut self,
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_: &mut CodeRepo,
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_: MachineFlags,
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_: &Module,
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_: &Vec<ModuleExport>,
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) -> Result<(), SessionError>;
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fn use_module(
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&mut self,
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_: &mut CodeRepo,
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_: MachineFlags,
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_: &Module
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) -> Result<(), SessionError>;
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}
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pub fn use_qualified_module<User>(
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user: &mut User,
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submodule: &Module,
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exports: &Vec<ModuleExport>,
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) -> Result<(), SessionError>
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where
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User: SubModuleUser,
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{
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for export in exports.iter().cloned() {
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match export {
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ModuleExport::PredicateKey((name, arity)) => {
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if !submodule
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.module_decl
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.exports
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.contains(&ModuleExport::PredicateKey((name.clone(), arity)))
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{
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continue;
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}
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if !user.import_decl(name.clone(), arity, submodule) {
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let submodule_name = submodule.module_decl.name.clone();
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return Err(SessionError::ModuleDoesNotContainExport(
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submodule_name,
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(name, arity)
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));
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}
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},
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ModuleExport::OpDecl(op_decl) => {
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if !submodule
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.module_decl
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.exports
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.contains(&ModuleExport::OpDecl(op_decl.clone()))
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{
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continue;
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}
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let op_dir = user.op_dir();
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let prec = op_decl.0;
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op_decl.insert_into_op_dir(
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submodule.module_decl.name.clone(),
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op_dir,
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prec,
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);
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}
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}
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}
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Ok(())
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}
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pub fn use_module<User: SubModuleUser>(
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user: &mut User,
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submodule: &Module,
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) -> Result<(), SessionError> {
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for export in submodule.module_decl.exports.iter().cloned() {
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match export {
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ModuleExport::PredicateKey((name, arity)) => {
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if !user.import_decl(name.clone(), arity, submodule) {
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let submodule_name = submodule.module_decl.name.clone();
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return Err(SessionError::ModuleDoesNotContainExport(
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submodule_name,
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(name, arity)
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));
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}
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}
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ModuleExport::OpDecl(op_decl) => {
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let op_dir = user.op_dir();
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let prec = op_decl.0;
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op_decl.insert_into_op_dir(
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submodule.module_decl.name.clone(),
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op_dir,
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prec,
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);
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}
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}
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}
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Ok(())
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}
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impl SubModuleUser for Module {
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fn atom_tbl(&self) -> TabledData<Atom> {
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self.atom_tbl.clone()
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}
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fn op_dir(&mut self) -> &mut OpDir {
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&mut self.op_dir
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}
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fn get_code_index(&self, key: PredicateKey, _: ClauseName) -> Option<CodeIndex> {
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self.code_dir.get(&key).cloned()
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}
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fn remove_code_index(&mut self, key: PredicateKey) {
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self.code_dir.remove(&key);
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}
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fn insert_dir_entry(&mut self, name: ClauseName, arity: usize, idx: CodeIndex) {
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self.code_dir.insert((name, arity), idx);
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}
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fn use_qualified_module(
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&mut self,
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_: &mut CodeRepo,
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_: MachineFlags,
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submodule: &Module,
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exports: &Vec<ModuleExport>,
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) -> Result<(), SessionError> {
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use_qualified_module(self, submodule, exports)?;
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(self.user_term_expansions.0)
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.0
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.extend((submodule.term_expansions.0).0.iter().cloned());
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self.user_term_expansions
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.1
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.extend(submodule.term_expansions.1.iter().cloned());
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(self.user_goal_expansions.0)
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.0
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.extend((submodule.goal_expansions.0).0.iter().cloned());
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self.user_goal_expansions
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.1
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.extend(submodule.goal_expansions.1.iter().cloned());
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Ok(())
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}
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fn use_module(
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&mut self,
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_: &mut CodeRepo,
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_: MachineFlags,
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submodule: &Module,
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) -> Result<(), SessionError> {
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use_module(self, submodule)?;
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(self.user_term_expansions.0)
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.0
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.extend((submodule.term_expansions.0).0.iter().cloned());
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self.user_term_expansions
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.1
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.extend(submodule.term_expansions.1.iter().cloned());
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(self.user_goal_expansions.0)
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.0
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.extend((submodule.goal_expansions.0).0.iter().cloned());
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self.user_goal_expansions
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.1
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.extend(submodule.goal_expansions.1.iter().cloned());
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Ok(())
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}
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}
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