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Add missing file
This commit is contained in:
Victor Maia
parent
9f1a0992eb
commit
40a8d38900
618
src/language.rs
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618
src/language.rs
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@ -0,0 +1,618 @@
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use std::collections::HashMap;
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use hvm::parser as parser;
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#[derive(Clone, Debug)]
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pub struct File {
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entries: HashMap<String, Box<Entry>>
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}
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#[derive(Clone, Debug)]
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pub struct Entry {
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name: String,
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args: Vec<Box<Argument>>,
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tipo: Box<Term>,
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rules: Vec<Box<Rule>>
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}
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#[derive(Clone, Debug)]
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pub struct Argument {
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eras: bool,
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name: String,
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tipo: Box<Term>,
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}
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#[derive(Clone, Debug)]
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pub struct Rule {
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name: String,
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pats: Vec<Box<Term>>,
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body: Box<Term>,
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}
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#[derive(Clone, Debug)]
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pub enum Term {
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Typ,
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Var { name: String },
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Let { name: String, expr: Box<Term>, body: Box<Term> },
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All { name: String, tipo: Box<Term>, body: Box<Term> },
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Lam { name: String, body: Box<Term> },
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App { func: Box<Term>, argm: Box<Term> },
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Ctr { name: String, args: Vec<Box<Term>> },
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Fun { name: String, args: Vec<Box<Term>> },
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}
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// Adjuster
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// ========
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pub fn adjust_file(file: &File) -> File {
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let mut entries = HashMap::new();
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for (name, entry) in &file.entries {
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entries.insert(name.clone(), Box::new(adjust_entry(file, &*entry)));
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}
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return File { entries };
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}
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pub fn adjust_entry(file: &File, entry: &Entry) -> Entry {
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let name = entry.name.clone();
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let mut args = Vec::new();
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for arg in &entry.args {
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args.push(Box::new(adjust_argument(file, arg)));
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}
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let tipo = Box::new(adjust_term(file, &*entry.tipo));
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let mut rules = Vec::new();
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for rule in &entry.rules {
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rules.push(Box::new(adjust_rule(file, &*rule)));
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}
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return Entry { name, args, tipo, rules };
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}
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pub fn adjust_argument(file: &File, arg: &Argument) -> Argument {
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let eras = arg.eras;
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let name = arg.name.clone();
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let tipo = Box::new(adjust_term(file, &*arg.tipo));
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return Argument { eras, name, tipo };
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}
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pub fn adjust_rule(file: &File, rule: &Rule) -> Rule {
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let name = rule.name.clone();
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let mut pats = Vec::new();
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for pat in &rule.pats {
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pats.push(Box::new(adjust_term(file, &*pat)));
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}
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let body = Box::new(adjust_term(file, &*rule.body));
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return Rule { name, pats, body };
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}
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pub fn adjust_term(file: &File, term: &Term) -> Term {
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match *term {
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Term::Typ => {
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Term::Typ
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},
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Term::Var { ref name } => {
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Term::Var { name: name.clone() }
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},
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Term::Let { ref name, ref expr, ref body } => {
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let expr = Box::new(adjust_term(file, &*expr));
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let body = Box::new(adjust_term(file, &*body));
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Term::Let { name: name.clone(), expr, body }
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},
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Term::All { ref name, ref tipo, ref body } => {
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let tipo = Box::new(adjust_term(file, &*tipo));
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let body = Box::new(adjust_term(file, &*body));
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Term::All { name: name.clone(), tipo, body }
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},
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Term::Lam { ref name, ref body } => {
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let body = Box::new(adjust_term(file, &*body));
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Term::Lam { name: name.clone(), body }
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},
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Term::App { ref func, ref argm } => {
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let func = Box::new(adjust_term(file, &*func));
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let argm = Box::new(adjust_term(file, &*argm));
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Term::App { func, argm }
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},
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Term::Ctr { ref name, ref args } => {
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if let Some(entry) = file.entries.get(name) {
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let mut new_args = Vec::new();
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for arg in args {
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new_args.push(Box::new(adjust_term(file, &*arg)));
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}
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if entry.rules.len() > 0 {
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Term::Fun { name: name.clone(), args: new_args }
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} else {
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Term::Ctr { name: name.clone(), args: new_args }
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}
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} else {
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panic!("Missing declaration for: '{}'.", name);
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}
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},
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Term::Fun { ref name, ref args } => {
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panic!("Internal error."); // shouldn't happen since we can't parse Fun{}
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},
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}
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}
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// Parser
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// ======
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pub fn is_var_head(head: char) -> bool {
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('a'..='z').contains(&head) || head == '_' || head == '$'
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}
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pub fn is_ctr_head(head: char) -> bool {
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('A'..='Z').contains(&head)
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}
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pub fn parse_var_name(state: parser::State) -> parser::Answer<String> {
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let (state, name) = parser::name1(state)?;
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if !is_var_head(name.chars().nth(0).unwrap_or(' ')) {
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let state = parser::State { index: state.index - name.len(), code: state.code }; // TODO: improve?
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return parser::expected("lowercase name", name.len(), state);
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} else {
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return Ok((state, name));
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}
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}
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pub fn parse_ctr_name(state: parser::State) -> parser::Answer<String> {
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let (state, name) = parser::name1(state)?;
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if !is_ctr_head(name.chars().nth(0).unwrap_or(' ')) {
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let state = parser::State { index: state.index - name.len(), code: state.code }; // TODO: improve?
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return parser::expected("uppercase name", name.len(), state);
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} else {
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return Ok((state, name));
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}
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}
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pub fn parse_var(state: parser::State) -> parser::Answer<Option<Box<Term>>> {
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parser::guard(
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Box::new(|state| {
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let (state, head) = parser::get_char(state)?;
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Ok((state, is_var_head(head)))
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}),
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Box::new(|state| {
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let (state, name) = parse_var_name(state)?;
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Ok((state, Box::new(Term::Var { name })))
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}),
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state,
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)
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}
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pub fn parse_lam(state: parser::State) -> parser::Answer<Option<Box<Term>>> {
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parser::guard(
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parser::text_parser("@"),
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Box::new(move |state| {
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let (state, _) = parser::consume("@", state)?;
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let (state, name) = parse_var_name(state)?;
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let (state, body) = parse_term(state)?;
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Ok((state, Box::new(Term::Lam { name, body })))
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}),
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state,
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)
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}
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pub fn parse_all(state: parser::State) -> parser::Answer<Option<Box<Term>>> {
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parser::guard(
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Box::new(|state| {
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let (state, all0) = parser::text("(", state)?;
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let (state, name) = parser::name(state)?;
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let (state, all1) = parser::text(":", state)?;
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Ok((state, all0 && all1 && name.len() > 0 && is_var_head(name.chars().nth(0).unwrap_or(' '))))
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}),
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Box::new(|state| {
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let (state, _) = parser::consume("(", state)?;
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let (state, name) = parse_var_name(state)?;
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let (state, _) = parser::consume(":", state)?;
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let (state, tipo) = parse_term(state)?;
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let (state, _) = parser::consume(")", state)?;
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let (state, body) = parse_term(state)?;
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Ok((state, Box::new(Term::All { name, tipo, body })))
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}),
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state,
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)
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}
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pub fn parse_app(state: parser::State) -> parser::Answer<Option<Box<Term>>> {
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return parser::guard(
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parser::text_parser("("),
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Box::new(|state| {
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parser::list(
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parser::text_parser("("),
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parser::text_parser(""),
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parser::text_parser(")"),
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Box::new(parse_term),
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Box::new(|args| {
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if !args.is_empty() {
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args.into_iter().reduce(|a, b| Box::new(Term::App { func: a, argm: b })).unwrap()
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} else {
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Box::new(Term::Var { name: "?".to_string() })
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}
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}),
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state,
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)
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}),
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state,
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);
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}
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pub fn parse_let(state: parser::State) -> parser::Answer<Option<Box<Term>>> {
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return parser::guard(
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parser::text_parser("let "),
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Box::new(|state| {
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let (state, _) = parser::consume("let ", state)?;
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let (state, name) = parse_var_name(state)?;
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let (state, _) = parser::consume("=", state)?;
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let (state, expr) = parse_term(state)?;
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let (state, _) = parser::text(";", state)?;
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let (state, body) = parse_term(state)?;
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Ok((state, Box::new(Term::Let { name, expr, body })))
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}),
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state,
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);
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}
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pub fn parse_ctr(state: parser::State) -> parser::Answer<Option<Box<Term>>> {
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parser::guard(
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Box::new(|state| {
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let (state, _) = parser::text("(", state)?;
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let (state, head) = parser::get_char(state)?;
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Ok((state, is_ctr_head(head)))
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}),
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Box::new(|state| {
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let (state, open) = parser::text("(", state)?;
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let (state, name) = parse_ctr_name(state)?;
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if name == "Type" {
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Ok((state, Box::new(Term::Typ)))
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} else {
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let (state, args) = if open {
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parser::until(parser::text_parser(")"), Box::new(parse_term), state)?
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} else {
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(state, Vec::new())
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};
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Ok((state, Box::new(Term::Ctr { name, args })))
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}
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}),
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state,
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)
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}
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pub fn parse_term(state: parser::State) -> parser::Answer<Box<Term>> {
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parser::grammar(
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"Term",
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&[
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Box::new(parse_let), // `let `
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Box::new(parse_all), // `(name:`
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Box::new(parse_ctr), // `(Name`
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Box::new(parse_app), // `(`
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Box::new(parse_lam), // `@`
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Box::new(parse_var), //
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Box::new(|state| Ok((state, None))),
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],
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state,
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)
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}
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pub fn parse_entry(state: parser::State) -> parser::Answer<Box<Entry>> {
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let (state, name) = parse_ctr_name(state)?;
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let (state, args) = parser::until(Box::new(|state| {
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let (state, end_0) = parser::dry(Box::new(|state| parser::text(":", state)), state)?;
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let (state, end_1) = parser::dry(Box::new(|state| parser::text("{", state)), state)?;
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return Ok((state, end_0 || end_1));
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}), Box::new(parse_argument), state)?;
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let (state, next) = parser::peek_char(state)?;
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let (state, tipo) = if next == ':' {
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let (state, anno) = parser::consume(":", state)?;
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parse_term(state)?
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} else {
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(state, Box::new(Term::Typ)) // TODO: return a hole
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};
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let (state, head) = parser::peek_char(state)?;
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if head == '{' {
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let (state, _) = parser::consume("{", state)?;
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let (state, body) = parse_term(state)?;
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let (state, _) = parser::consume("}", state)?;
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let mut pats = vec![];
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for arg in &args {
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pats.push(Box::new(Term::Var { name: arg.name.clone() }));
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}
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let rules = vec![Box::new(Rule { name: name.clone(), pats, body })];
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return Ok((state, Box::new(Entry { name, args, tipo, rules })));
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} else {
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let mut rules = Vec::new();
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let rule_prefix = &format!("{} ", name);
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let mut state = state;
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loop {
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let loop_state = state;
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let (loop_state, cont) = parser::text(&rule_prefix, loop_state)?;
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if cont {
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let (loop_state, rule) = parse_rule(loop_state, name.clone())?;
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rules.push(rule);
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state = loop_state;
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} else {
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state = loop_state;
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break;
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}
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}
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return Ok((state, Box::new(Entry { name, args, tipo, rules })));
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}
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}
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pub fn parse_rule(state: parser::State, name: String) -> parser::Answer<Box<Rule>> {
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let (state, pats) = parser::until(parser::text_parser("="), Box::new(parse_term), state)?;
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let (state, body) = parse_term(state)?;
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return Ok((state, Box::new(Rule { name, pats, body })));
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}
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pub fn parse_argument(state: parser::State) -> parser::Answer<Box<Argument>> {
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let (state, _) = parser::consume("(", state)?;
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let (state, name) = parse_var_name(state)?;
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let (state, _) = parser::consume(":", state)?;
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let (state, tipo) = parse_term(state)?;
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let (state, _) = parser::consume(")", state)?;
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return Ok((state, Box::new(Argument { eras: false, name, tipo })));
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}
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pub fn parse_file(state: parser::State) -> parser::Answer<Box<File>> {
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let (state, entry_vec) = parser::until(Box::new(parser::done), Box::new(parse_entry), state)?;
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let mut entries = HashMap::new();
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for entry in entry_vec {
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entries.insert(entry.name.clone(), entry);
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}
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return Ok((state, Box::new(File { entries })));
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}
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pub fn show_term(term: &Term) -> String {
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match term {
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Term::Typ => {
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format!("Type")
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}
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Term::Var { name } => {
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format!("{}", name)
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}
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Term::Let { name, expr, body } => {
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let expr = show_term(expr);
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let body = show_term(body);
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format!("let {} = {}; {}", name, expr, body)
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}
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Term::Lam { name, body } => {
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let body = show_term(body);
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format!("@{}({})", name, body)
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}
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Term::App { func, argm } => {
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let mut args = vec![argm];
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let mut expr = func;
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while let Term::App { func, argm } = &**expr {
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args.push(argm);
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expr = func;
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}
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args.reverse();
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format!("({} {})", show_term(expr), args.iter().map(|x| show_term(x)).collect::<Vec<String>>().join(" "))
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}
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Term::All { name, tipo, body } => {
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let body = show_term(body);
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format!("({}: {}) {}", name, show_term(tipo), body)
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}
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Term::Ctr { name, args } => {
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format!("{{{}{}}}", name, args.iter().map(|x| format!(" {}",show_term(x))).collect::<String>())
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}
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Term::Fun { name, args } => {
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format!("({}{})", name, args.iter().map(|x| format!(" {}",show_term(x))).collect::<String>())
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}
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}
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}
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pub fn show_rule(rule: &Rule) -> String {
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let name = &rule.name;
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let mut pats = vec![];
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for pat in &rule.pats {
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pats.push(show_term(pat));
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}
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let body = show_term(&rule.body);
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format!("{} {} => {}", name, pats.join(" "), body)
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}
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pub fn show_entry(entry: &Entry) -> String {
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let name = &entry.name;
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let mut args = vec![];
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for arg in &entry.args {
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args.push(format!(" ({}: {})", arg.name, show_term(&arg.tipo)));
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}
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if entry.rules.len() == 0 {
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format!("{}{} : {}", name, args.join(""), show_term(&entry.tipo))
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} else {
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let mut rules = vec![];
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for rule in &entry.rules {
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rules.push(format!("\n {}", show_rule(rule)));
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}
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format!("{}{} : {} {{{}\n}}", name, args.join(""), show_term(&entry.tipo), rules.join(""))
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}
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}
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pub fn show_file(file: &File) -> String {
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let mut entries = vec![];
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for entry in file.entries.values() {
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entries.push(show_entry(entry));
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}
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entries.join("\n")
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}
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pub fn read_term(code: &str) -> Result<Box<Term>, String> {
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parser::read(Box::new(parse_term), code)
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}
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pub fn read_file(code: &str) -> Result<Box<File>, String> {
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parser::read(Box::new(parse_file), code)
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}
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// Compiler
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// ========
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//pub enum Term {
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//Typ,
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//Var { name: String },
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||||
//Let { name: String, expr: Box<Term>, body: Box<Term> },
|
||||
//App { func: Box<Term>, argm: Box<Term> },
|
||||
//Lam { name: String, body: Box<Term> },
|
||||
//All { name: String, tipo: Box<Term>, body: Box<Term> },
|
||||
//Ctr { name: String, args: Vec<Box<Term>> },
|
||||
//Fun { name: String, args: Vec<Box<Term>> },
|
||||
//}
|
||||
pub fn compile_term(term: &Term, quote: bool) -> String {
|
||||
match term {
|
||||
Term::Typ => {
|
||||
format!("Typ")
|
||||
}
|
||||
Term::Var { name } => {
|
||||
name.clone()
|
||||
}
|
||||
Term::Let { name, expr, body } => {
|
||||
todo!()
|
||||
}
|
||||
Term::All { name, tipo, body } => {
|
||||
format!("(All {} λ{} {})", compile_term(tipo, quote), name, compile_term(body, quote))
|
||||
}
|
||||
Term::Lam { name, body } => {
|
||||
format!("(Lam λ{} {})", name, compile_term(body, quote))
|
||||
}
|
||||
Term::App { func, argm } => {
|
||||
format!("({} {} {})", if quote { "App" } else { "Apply" }, compile_term(func, quote), compile_term(argm, quote))
|
||||
}
|
||||
Term::Ctr { name, args } => {
|
||||
let mut args_strs : Vec<String> = Vec::new();
|
||||
for arg in args {
|
||||
args_strs.push(format!(" {}", compile_term(arg, quote)));
|
||||
}
|
||||
format!("(Ct{} {}.{})", args.len(), name, args_strs.join(""))
|
||||
}
|
||||
Term::Fun { name, args } => {
|
||||
let mut args_strs : Vec<String> = Vec::new();
|
||||
for arg in args {
|
||||
args_strs.push(format!(" {}", compile_term(arg, quote)));
|
||||
}
|
||||
format!("({}{} {}.{})", if quote { "NewFn" } else { "Rule_" }, args.len(), name, args_strs.join(""))
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub fn compile_entry(entry: &Entry) -> String {
|
||||
fn compile_type(args: &Vec<Box<Argument>>, tipo: &Box<Term>, index: usize) -> String {
|
||||
if index < args.len() {
|
||||
let arg = &args[index];
|
||||
format!("(All {} λ{} {})", compile_term(&arg.tipo, false), arg.name, compile_type(args, tipo, index + 1))
|
||||
} else {
|
||||
compile_term(tipo, false)
|
||||
}
|
||||
}
|
||||
|
||||
fn compile_rule(rule: &Rule) -> String {
|
||||
let mut pats = vec![];
|
||||
for pat in &rule.pats {
|
||||
pats.push(format!(" {}", compile_term(pat, false)));
|
||||
}
|
||||
let mut vars = vec![];
|
||||
for idx in 0 .. pats.len() {
|
||||
vars.push(format!(" x{}", idx));
|
||||
}
|
||||
let body_rhs = compile_term(&rule.body, true);
|
||||
let rule_rhs = compile_term(&rule.body, false);
|
||||
let mut text = String::new();
|
||||
//text.push_str(&format!(" (Rule{} {}.{}) = {}\n", rule.pats.len(), rule.name, pats.join(""), body));
|
||||
text.push_str(&format!(" (Body_{} {}.{}) = {}\n", rule.pats.len(), rule.name, pats.join(""), body_rhs));
|
||||
//text.push_str(&format!(" (Body_{} {}.{}) = (NewFn{} {}.{})\n", rule.pats.len(), rule.name, vars.join(""), rule.pats.len(), rule.name, vars.join("")));
|
||||
text.push_str(&format!(" (Rule_{} {}.{}) = {}\n", rule.pats.len(), rule.name, pats.join(""), rule_rhs));
|
||||
return text;
|
||||
}
|
||||
|
||||
fn compile_rule_chk(rule: &Rule, index: usize, vars: &mut u64, args: &mut Vec<String>) -> String {
|
||||
if index < rule.pats.len() {
|
||||
let (inp_patt_str, var_patt_str) = compile_patt_chk(&rule.pats[index], vars);
|
||||
args.push(var_patt_str);
|
||||
let head = inp_patt_str;
|
||||
let tail = compile_rule_chk(rule, index + 1, vars, args);
|
||||
return format!("(LHS {} {})", head, tail);
|
||||
} else {
|
||||
return format!("(RHS (Body_{} {}.{}))", index, rule.name, args.iter().map(|x| format!(" {}", x)).collect::<Vec<String>>().join(""));
|
||||
}
|
||||
}
|
||||
|
||||
fn compile_patt_chk(patt: &Term, vars: &mut u64) -> (String, String) {
|
||||
match patt {
|
||||
Term::Var { .. } => {
|
||||
let inp = format!("(Inp {})", vars);
|
||||
let var = format!("(Var {})", vars);
|
||||
*vars += 1;
|
||||
return (inp, var);
|
||||
}
|
||||
Term::Ctr { name, args } => {
|
||||
let mut inp_args_str = String::new();
|
||||
let mut var_args_str = String::new();
|
||||
for arg in args {
|
||||
let (inp_arg_str, var_arg_str) = compile_patt_chk(arg, vars);
|
||||
inp_args_str.push_str(&format!(" {}", inp_arg_str));
|
||||
var_args_str.push_str(&format!(" {}", var_arg_str));
|
||||
}
|
||||
let inp_str = format!("(Ct{} {}.{})", args.len(), name, inp_args_str);
|
||||
let var_str = format!("(Ct{} {}.{})", args.len(), name, var_args_str);
|
||||
return (inp_str, var_str);
|
||||
}
|
||||
_ => {
|
||||
panic!("Invalid left-hand side pattern: {}", show_term(patt));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
let mut result = String::new();
|
||||
result.push_str(&format!(" (NameOf {}.) = \"{}\"\n", entry.name, entry.name));
|
||||
result.push_str(&format!(" (HashOf {}.) = %{}\n", entry.name, entry.name));
|
||||
result.push_str(&format!(" (TypeOf {}.) = {}\n", entry.name, compile_type(&entry.args, &entry.tipo, 0)));
|
||||
for rule in &entry.rules {
|
||||
result.push_str(&compile_rule(&rule));
|
||||
}
|
||||
result.push_str(&format!(" (Verify {}.) =\n", entry.name));
|
||||
for rule in &entry.rules {
|
||||
result.push_str(&format!(" (Cons {}\n", compile_rule_chk(&rule, 0, &mut 0, &mut vec![])));
|
||||
}
|
||||
result.push_str(&format!(" Nil{}\n", ")".repeat(entry.rules.len())));
|
||||
return result;
|
||||
}
|
||||
|
||||
pub fn compile_file(file: &File) -> String {
|
||||
let mut result = String::new();
|
||||
result.push_str(&format!("\n Functions =\n"));
|
||||
result.push_str(&format!(" let fns = Nil\n"));
|
||||
for entry in file.entries.values() {
|
||||
result.push_str(&format!(" let fns = (Cons {}. fns)\n", entry. name));
|
||||
}
|
||||
result.push_str(&format!(" fns\n\n"));
|
||||
for entry in file.entries.values() {
|
||||
result.push_str(&format!(" // {}\n", entry.name));
|
||||
result.push_str(&format!(" // {}\n", "-".repeat(entry.name.len())));
|
||||
result.push_str(&format!("\n"));
|
||||
result.push_str(&compile_entry(&entry));
|
||||
result.push_str(&format!("\n"));
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
pub fn readback_string(rt: &hvm::Runtime, host: u64) -> String {
|
||||
let str_cons = rt.get_id("String.cons");
|
||||
let str_nil = rt.get_id("String.nil");
|
||||
let mut term = rt.ptr(host);
|
||||
let mut text = String::new();
|
||||
loop {
|
||||
if hvm::get_tag(term) == hvm::CTR {
|
||||
let fid = hvm::get_ext(term);
|
||||
if fid == str_cons {
|
||||
let head = rt.ptr(hvm::get_loc(term, 0));
|
||||
let tail = rt.ptr(hvm::get_loc(term, 1));
|
||||
if hvm::get_tag(head) == hvm::NUM {
|
||||
text.push(std::char::from_u32(hvm::get_num(head) as u32).unwrap_or('?'));
|
||||
term = tail;
|
||||
continue;
|
||||
}
|
||||
}
|
||||
if fid == str_nil {
|
||||
break;
|
||||
}
|
||||
}
|
||||
panic!("Invalid output: {} {}", hvm::get_tag(term), rt.show(host));
|
||||
}
|
||||
return text;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user