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extern crate peg;
use peg::parser;
use std::iter::FromIterator;
use std::vec::Vec;
use crate::types::{Bounds, Name, Type, TypeVar};
pub type Id = String;
pub type Literal = String;
#[derive(Clone, Debug)]
pub enum Refinement {
Prop(Box<Term>),
AndProps(Box<Refinement>, Box<Refinement>),
}
#[derive(Clone, Debug)]
pub enum Term {
LitTerm(Box<Literal>),
VarTerm(Box<Id>),
LambdaTerm((Box<Id>, Box<Bounds>), Box<Term>),
AppTerm(Box<Term>, Box<Term>),
}
impl Term {
pub fn is_quantifier(&self) -> bool {
match self {
Term::VarTerm(id) => id.to_string().eq("forall"),
_ => false,
}
}
pub fn require_cdr(&self) -> bool {
match self {
Term::VarTerm(id) => id.to_string().eq("pop"),
_ => false,
}
}
}
impl ToString for Term {
fn to_string(&self) -> String {
match self {
Term::LitTerm(l) => l.to_string(),
Term::VarTerm(id) => id.to_string(),
Term::LambdaTerm((id, bounds), t) => id.to_string(),
Term::AppTerm(t1, t2) => t1.to_string() + &t2.to_string(),
}
}
}
#[derive(Clone, Debug)]
pub enum Decl {
PropertyDecl((Box<Id>, Box<Type>), Box<Term>),
ConTypeDecl(Box<Type>, (Box<Id>, Box<Bounds>, Box<Refinement>)),
}
impl Decl {
pub fn is_prop_decl(&self) -> bool {
matches!(self, Decl::PropertyDecl(_, _))
}
pub fn is_contype_decl(&self) -> bool {
matches!(self, Decl::ConTypeDecl(_, _))
}
pub fn get_name(&self) -> String {
match self {
Decl::ConTypeDecl(con_ty, _) => {
let (con, _) = con_ty.get_con_elem().unwrap();
con
}
Decl::PropertyDecl((id, _), _) => id.to_string(),
}
}
}
pub type Spec = Vec<Decl>;
pub type Code = String;
#[derive(Clone, Debug)]
pub enum Block {
SpecBlock(Box<Spec>, usize),
CodeBlock(Box<Code>, usize),
}
impl Block {
pub fn is_spec_block(&self) -> bool {
matches!(self, Block::SpecBlock(_, _))
}
pub fn is_code_block(&self) -> bool {
matches!(self, Block::CodeBlock(_, _))
}
pub fn extract_spec(&self) -> Spec {
match self {
Block::SpecBlock(spec, _) => spec.to_vec(),
_ => Vec::new(),
}
}
pub fn extract_code(&self) -> Code {
match self {
Block::CodeBlock(code, _) => code.to_string(),
_ => String::new(),
}
}
}
pub type Prog = Vec<Block>;
parser! {
pub grammar spec() for str {
pub rule id() -> Id
= s:$(!keyword() ([ 'a'..='z' | 'A'..='Z' | '_' ]['a'..='z' | 'A'..='Z' | '0'..='9' | '_' | '-' | '?' ]*))
{ s.into() }
pub rule name() -> Name
= s:$(!keyword() ([ 'a'..='z' | 'A'..='Z' | '_' ]['a'..='z' | 'A'..='Z' | '0'..='9' ]*))
{ s.into() }
pub rule keyword() -> ()
= ("crate" / "super" / "self" / "Self" / "const" / "mut" / "true" / "false" / "pub" / "in" / "from" / "with"
/ "f32"/ "i32" / "u32" / "bool" / "let" / "if" / "else" / "for" / "while" / "fn" / "do")
![ 'a'..='z' | 'A'..='Z' | '0'..='9' | '_' | '-' | '?' ]
pub rule literal() -> Literal
= s:$("true" / "false")
{ s.into() }
pub rule ty() -> Type
= precedence! {
n:name() "<" _ t:ty() _ ">"
{ Type::Con(Box::new(n), Box::new(t), Box::new(Bounds::from(["Container".to_string()]))) }
--
n:name()
{ Type::Var(TypeVar::new(n)) }
}
pub rule term() -> Term
= precedence!{
lit: literal() { Term::LitTerm(Box::new(lit)) }
--
v:id() { Term::VarTerm(Box::new(v)) }
--
"\\" v:id() _ "->" _ t:term() { Term::LambdaTerm((Box::new(v), Box::default()), Box::new(t)) }
--
"\\" v:id() _ "<:" _ "(" _ b:bounds() _ ")" _ "->" _ t:term() { Term::LambdaTerm((Box::new(v), Box::new(b)), Box::new(t)) }
--
"(" _ t1:term() __ t2:term() _ ")" { Term::AppTerm(Box::new(t1), Box::new(t2)) }
}
pub rule refinement() -> Refinement
= precedence!{
t:term() { Refinement::Prop(Box::new(t)) }
--
"(" _ p1:refinement() __ "and" __ p2:refinement() _ ")" { Refinement::AndProps(Box::new(p1), Box::new(p2)) }
}
pub rule bounds() -> Bounds
= l: ((_ n:name() _ {n}) ++ "," ) { Bounds::from_iter(l.iter().cloned()) }
pub rule decl() -> Decl
= precedence! {
_ "property" __ p:id() _ "<" _ ty:ty() _ ">" _ "{" _ t:term() _ "}" _
{
Decl::PropertyDecl((Box::new(p), Box::new(ty)), Box::new(t))
}
--
_ "type" __ ty:ty() _ "=" _ "{" _ c:id() _ "impl" __ "(" _ b:bounds() _ ")" _ "|" _ t:refinement() _ "}" _
{
Decl::ConTypeDecl(Box::new(ty), (Box::new(c), Box::new(b), Box::new(t)))
}
}
pub rule spec() -> Spec
= _ "/*SPEC*" _ decls: (d:decl() { d }) ** _ _ "*ENDSPEC*/" _
{
decls
}
pub rule code() -> Code
= _ "/*CODE*/" c:$((!"/*ENDCODE*/"!"/*SPEC*"!"*ENDSPEC*/"[_])*) "/*ENDCODE*/" _ { c.into() }
pub rule block() -> Block
= precedence! {
_ p:position!() s:spec() _
{
Block::SpecBlock(Box::new(s), p)
}
--
_ p:position!() c:code() _
{
Block::CodeBlock(Box::new(c), p)
}
}
pub rule prog() -> Prog
= _ blocks: (b:block() { b }) ** _ _
{
blocks
}
rule _ = quiet!{[' ' | '\n' | '\t']*}
rule __ = quiet!{[' ' | '\n' | '\t']+}
}}
|
