rishi/scryer-prolog
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fixes to quoted

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This commit is contained in:
Mark Thom
2018-09-03 17:21:28 -06:00
parent 239552f4c3
commit 4be20e48e6
7 changed files with 100 additions and 51 deletions
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2
README.md
View File

@@ -110,7 +110,7 @@ information.
The following predicates are built-in to rusty-wam.
* Arithmetic support:
* `is/2` works for `(+)/2`, `(-)/{1,2}`, `(*)/2`, `(//)/2`, `(^)/2`, `(div)/2`, `(/)/2`, `(rdiv)/2`,
* `is/2` works for `(+)/2`, `(-)/{1,2}`, `(*)/2`, `(//)/2`, `(**)/2`, `(div)/2`, `(/)/2`, `(rdiv)/2`,
`(xor)/2`, `(rem)/2`, `(mod)/2`, `(/\)/2`, `(\/)/2`, `(>>)/2`, `(<<)/2`, `abs/1`.
* Comparison operators: `>`, `<`, `=<`, `>=`, `=:=`, `=\=`.
* `(:)/2`

2
src/prolog/arithmetic.rs
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@@ -122,7 +122,7 @@ impl<'a> ArithmeticEvaluator<'a>
"div" => Ok(ArithmeticInstruction::FIDiv(a1, a2, t)),
"rdiv" => Ok(ArithmeticInstruction::RDiv(a1, a2, t)),
"*" => Ok(ArithmeticInstruction::Mul(a1, a2, t)),
"^" => Ok(ArithmeticInstruction::Pow(a1, a2, t)),
"**" => Ok(ArithmeticInstruction::Pow(a1, a2, t)),
">>" => Ok(ArithmeticInstruction::Shr(a1, a2, t)),
"<<" => Ok(ArithmeticInstruction::Shl(a1, a2, t)),
"/\\" => Ok(ArithmeticInstruction::And(a1, a2, t)),

71
src/prolog/heap_print.rs
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@@ -6,12 +6,14 @@ use prolog::ordered_float::OrderedFloat;
use std::cell::Cell;
use std::collections::{HashMap, HashSet};
use std::iter::once;
use std::rc::Rc;
#[derive(Clone)]
pub enum TokenOrRedirect {
Atom(ClauseName),
NumberedVar(String),
Op(ClauseName),
NumberedVar(String),
Redirect,
Open,
Close,
@@ -113,16 +115,16 @@ fn is_numbered_var(ct: &ClauseType, arity: usize) -> bool {
fn print_op(ct: ClauseType, fixity: Fixity, state_stack: &mut Vec<TokenOrRedirect>) {
match fixity {
Fixity::Post => {
state_stack.push(TokenOrRedirect::Atom(ct.name()));
state_stack.push(TokenOrRedirect::Op(ct.name()));
state_stack.push(TokenOrRedirect::Redirect);
},
Fixity::Pre => {
state_stack.push(TokenOrRedirect::Redirect);
state_stack.push(TokenOrRedirect::Atom(ct.name()));
state_stack.push(TokenOrRedirect::Op(ct.name()));
},
Fixity::In => {
state_stack.push(TokenOrRedirect::Redirect);
state_stack.push(TokenOrRedirect::Atom(ct.name()));
state_stack.push(TokenOrRedirect::Op(ct.name()));
state_stack.push(TokenOrRedirect::Redirect);
}
}
@@ -200,8 +202,53 @@ fn reverse_heap_locs<'a>(machine_st: &'a MachineState, heap_locs: &'a HeapVarDic
}).collect()
}
fn non_quoted_token(c: char) -> bool {
graphic_token_char!(c) || alpha_numeric_char!(c)
fn non_quoted_graphic_token<Iter: Iterator<Item=char>>(mut iter: Iter, c: char) -> bool {
if c == '/' {
return match iter.next() {
None => true,
Some('*') => false, // if we start with comment token, we must quote.
Some(c) => if graphic_token_char!(c) {
iter.all(|c| graphic_token_char!(c))
} else {
false
}
}
} else if c == '.' {
return match iter.next() {
None => false,
Some(c) => if graphic_token_char!(c) {
iter.all(|c| graphic_token_char!(c))
} else {
false
}
}
} else {
iter.all(|c| graphic_token_char!(c))
}
}
fn non_quoted_token<Iter: Iterator<Item=char>>(mut iter: Iter) -> bool {
if let Some(c) = iter.next() {
if small_letter_char!(c) {
iter.all(|c| alpha_numeric_char!(c))
} else if graphic_token_char!(c) {
non_quoted_graphic_token(iter, c)
} else if semicolon_char!(c) {
iter.next().is_none()
} else if cut_char!(c) {
iter.next().is_none()
} else if solo_char!(c) {
!iter.next().is_none()
} else if c == '[' {
(iter.next() == Some(']') && iter.next().is_none())
} else if c == '{' {
(iter.next() == Some('}') && iter.next().is_none())
} else {
false
}
} else {
false
}
}
impl<'a, Formatter: HCValueFormatter, Outputter: HCValueOutputter>
@@ -277,11 +324,11 @@ impl<'a, Formatter: HCValueFormatter, Outputter: HCValueOutputter>
})
}
fn print_atom(&mut self, atom: &ClauseName) {
fn print_atom(&mut self, atom: &ClauseName, is_op: bool) {
match atom.as_str() {
"" => self.outputter.append("''"),
";" | "!" => self.outputter.append(atom.as_str()),
s => if s.chars().all(non_quoted_token) {
s => if is_op || non_quoted_token(s.chars()) {
self.outputter.append(atom.as_str());
} else {
self.outputter.push_char('\'');
@@ -311,8 +358,8 @@ impl<'a, Formatter: HCValueFormatter, Outputter: HCValueOutputter>
fn print_constant(&mut self, c: Constant) {
match c {
Constant::Atom(ref atom) =>
self.print_atom(atom),
Constant::Char(c) if non_quoted_token(c) =>
self.print_atom(atom, false),
Constant::Char(c) if non_quoted_token(once(c)) =>
self.print_char(c),
Constant::Char(c) => {
self.outputter.push_char('\'');
@@ -408,7 +455,9 @@ impl<'a, Formatter: HCValueFormatter, Outputter: HCValueOutputter>
if let Some(loc_data) = self.state_stack.pop() {
match loc_data {
TokenOrRedirect::Atom(atom) =>
self.print_atom(&atom),
self.print_atom(&atom, false),
TokenOrRedirect::Op(atom) =>
self.print_atom(&atom, true),
TokenOrRedirect::NumberedVar(num_var) =>
self.outputter.append(num_var.as_str()),
TokenOrRedirect::Redirect =>

4
src/prolog/lib/builtins.pl
View File

@@ -1,6 +1,6 @@
:- op(400, yfx, /).
:- module(builtins, [(=)/2, (+)/2, (^)/2, (*)/2, (-)/2, (/)/2, (/\)/2,
:- module(builtins, [(=)/2, (+)/2, (**)/2, (*)/2, (-)/2, (/)/2, (/\)/2,
(\/)/2, (is)/2, (xor)/2, (div)/2, (//)/2, (rdiv)/2, (<<)/2,
(>>)/2, (mod)/2, (rem)/2, (>)/2, (<)/2, (=\=)/2, (=:=)/2,
(-)/1, (>=)/2, (=<)/2, (,)/2, (->)/2, (;)/2, (=..)/2, (==)/2,
@@ -19,7 +19,7 @@
:- op(500, yfx, +).
:- op(500, yfx, -).
:- op(400, yfx, *).
:- op(200, xfy, ^).
:- op(200, xfy, **).
:- op(500, yfx, /\).
:- op(500, yfx, \/).
:- op(500, yfx, xor).

4
src/prolog/machine/machine_state_impl.rs
View File

@@ -481,7 +481,7 @@ impl MachineState {
"-" => interms.push(a1 - a2),
"*" => interms.push(a1 * a2),
"/" => interms.push(self.div(a1, a2)?),
"^" => interms.push(self.pow(a1, a2)?),
"**" => interms.push(self.pow(a1, a2)?),
"rdiv" => {
let r1 = self.get_rational(&ArithmeticTerm::Number(a1), &caller)?;
let r2 = self.get_rational(&ArithmeticTerm::Number(a2), &caller)?;
@@ -593,7 +593,7 @@ impl MachineState {
match n1.pow(n2) {
Ok(result) => Ok(result),
Err(_) => {
let stub = MachineError::functor_stub(clause_name!("^"), 2);
let stub = MachineError::functor_stub(clause_name!("**"), 2);
Err(self.error_form(MachineError::evaluation_error(EvalError::NoRoots),
stub))
}

2
src/prolog/parser

Submodule src/prolog/parser updated: ba9962514a...48814651b8

66
src/tests.rs
View File

@@ -1027,66 +1027,66 @@ fn test_queries_on_arithmetic()
submit(&mut wam, ":- op(900, xfx, ~).");
submit(&mut wam, "X ~ Y :- abs(X - Y) =< 1 rdiv 10000.");
assert_prolog_success!(&mut wam, "?- X is 3 ^ 3.",
assert_prolog_success!(&mut wam, "?- X is 3 ** 3.",
[["X = 27"]]);
assert_prolog_success!(&mut wam, "?- X is 3 ^ 0.",
assert_prolog_success!(&mut wam, "?- X is 3 ** 0.",
[["X = 1"]]);
assert_prolog_success!(&mut wam, "?- X is 3 ^ -0.",
assert_prolog_success!(&mut wam, "?- X is 3 ** -0.",
[["X = 1"]]);
assert_prolog_success!(&mut wam, "?- X is 3 ^ 1.",
assert_prolog_success!(&mut wam, "?- X is 3 ** 1.",
[["X = 3"]]);
assert_prolog_success!(&mut wam, "?- X is 3 ^ -3.",
assert_prolog_success!(&mut wam, "?- X is 3 ** -3.",
[["X = 1/27"]]);
assert_prolog_success!(&mut wam, "?- X is (-3) ^ 3.",
assert_prolog_success!(&mut wam, "?- X is (-3) ** 3.",
[["X = -27"]]);
assert_prolog_success!(&mut wam, "?- X is (-3) ^ 3.",
assert_prolog_success!(&mut wam, "?- X is (-3) ** 3.",
[["X = -27"]]);
assert_prolog_success!(&mut wam, "?- X is (-3) ^ 0.",
assert_prolog_success!(&mut wam, "?- X is (-3) ** 0.",
[["X = 1"]]);
assert_prolog_success!(&mut wam, "?- X is (-3) ^ -0.",
assert_prolog_success!(&mut wam, "?- X is (-3) ** -0.",
[["X = 1"]]);
assert_prolog_success!(&mut wam, "?- X is (-3) ^ 1.",
assert_prolog_success!(&mut wam, "?- X is (-3) ** 1.",
[["X = -3"]]);
assert_prolog_success!(&mut wam, "?- X is (-3) ^ -3.",
assert_prolog_success!(&mut wam, "?- X is (-3) ** -3.",
[["X = -1/27"]]);
assert_prolog_success!(&mut wam, "?- X is (1 rdiv 27) ^ -3, X ~ 19683.");
assert_prolog_success!(&mut wam, "?- X is (-1 rdiv 27) ^ -3, X ~ -19683.");
assert_prolog_success!(&mut wam, "?- X is (1 rdiv 27) ** -3, X ~ 19683.");
assert_prolog_success!(&mut wam, "?- X is (-1 rdiv 27) ** -3, X ~ -19683.");
assert_prolog_success!(&mut wam, "?- X is 0.0 ^ 0.",
assert_prolog_success!(&mut wam, "?- X is 0.0 ** 0.",
[["X = 1"]]);
assert_prolog_success!(&mut wam, "?- catch(_ is 0.0 ^ -2342, error(E, _), true).",
assert_prolog_success!(&mut wam, "?- catch(_ is 0.0 ** -2342, error(E, _), true).",
[["E = evaluation_error(no_roots)"]]);
assert_prolog_success!(&mut wam, "?- X is 0.0 ^ 2342.",
assert_prolog_success!(&mut wam, "?- X is 0.0 ** 2342.",
[["X = 0"]]);
assert_prolog_success!(&mut wam, "?- catch(_ is (-3) ^ (1 rdiv 2), error(E, _), true).",
assert_prolog_success!(&mut wam, "?- catch(_ is (-3) ** (1 rdiv 2), error(E, _), true).",
[["E = evaluation_error(no_roots)"]]);
assert_prolog_success!(&mut wam, "?- catch(_ is (-3/2) ^ (1 rdiv 2), error(E, _), true).",
assert_prolog_success!(&mut wam, "?- catch(_ is (-3/2) ** (1 rdiv 2), error(E, _), true).",
[["E = evaluation_error(no_roots)"]]);
assert_prolog_success!(&mut wam, "?- catch(_ is (-3 rdiv 2) ^ (1 rdiv 4), error(E, _), true).",
assert_prolog_success!(&mut wam, "?- catch(_ is (-3 rdiv 2) ** (1 rdiv 4), error(E, _), true).",
[["E = evaluation_error(no_roots)"]]);
assert_prolog_success!(&mut wam, "?- catch(_ is (-3 rdiv 2) ^ (-1 rdiv 4), error(E, _), true).",
assert_prolog_success!(&mut wam, "?- catch(_ is (-3 rdiv 2) ** (-1 rdiv 4), error(E, _), true).",
[["E = evaluation_error(no_roots)"]]);
assert_prolog_success!(&mut wam, "?- catch(_ is 0 ^ (-5 rdiv 4), error(E, _), true).",
assert_prolog_success!(&mut wam, "?- catch(_ is 0 ** (-5 rdiv 4), error(E, _), true).",
[["E = evaluation_error(no_roots)"]]);
assert_prolog_success!(&mut wam, "?- X is 3 ^ (1 rdiv 3), Y is X ^ 3, Y ~ 3.");
assert_prolog_success!(&mut wam, "?- X is (-3) ^ (1 rdiv 3), Y is X ^ 3, Y ~ -3.");
assert_prolog_failure!(&mut wam, "?- X is (-5) ^ (1 rdiv 3), Y is X ^ 3, Y ~ -3.");
assert_prolog_failure!(&mut wam, "?- X is 5 ^ (1 rdiv 3), Y is X ^ 3, Y ~ 3.");
assert_prolog_failure!(&mut wam, "?- X is (1 rdiv 3) ^ 0.5, Y is X ^ 2, X ~ Y.");
assert_prolog_success!(&mut wam, "?- X is (1 rdiv 3) ^ 0.5, Y is X ^ 2, 1 rdiv 3 ~ Y.");
assert_prolog_success!(&mut wam, "?- X is 3 ** (1 rdiv 3), Y is X ** 3, Y ~ 3.");
assert_prolog_success!(&mut wam, "?- X is (-3) ** (1 rdiv 3), Y is X ** 3, Y ~ -3.");
assert_prolog_failure!(&mut wam, "?- X is (-5) ** (1 rdiv 3), Y is X ** 3, Y ~ -3.");
assert_prolog_failure!(&mut wam, "?- X is 5 ** (1 rdiv 3), Y is X ** 3, Y ~ 3.");
assert_prolog_failure!(&mut wam, "?- X is (1 rdiv 3) ** 0.5, Y is X ** 2, X ~ Y.");
assert_prolog_success!(&mut wam, "?- X is (1 rdiv 3) ** 0.5, Y is X ** 2, 1 rdiv 3 ~ Y.");
assert_prolog_success!(&mut wam, "?- X is (-5) ^ (-1 rdiv 3), Y is X ^ 3, Y ~ -1 rdiv 5.");
assert_prolog_failure!(&mut wam, "?- X is (-5) ^ (-1 rdiv 3), Y is X ^ 3, Y ~ 1 rdiv 5.");
assert_prolog_success!(&mut wam, "?- X is (-5) ** (-1 rdiv 3), Y is X ** 3, Y ~ -1 rdiv 5.");
assert_prolog_failure!(&mut wam, "?- X is (-5) ** (-1 rdiv 3), Y is X ** 3, Y ~ 1 rdiv 5.");
assert_prolog_success!(&mut wam, "?- X is (0 rdiv 5) ^ 5.",
assert_prolog_success!(&mut wam, "?- X is (0 rdiv 5) ** 5.",
[["X = 0"]]);
assert_prolog_success!(&mut wam, "?- X is (-0 rdiv 5) ^ 5.",
assert_prolog_success!(&mut wam, "?- X is (-0 rdiv 5) ** 5.",
[["X = 0"]]);
assert_prolog_success!(&mut wam, "?- X is (0 rdiv 5) ^ 0.",
assert_prolog_success!(&mut wam, "?- X is (0 rdiv 5) ** 0.",
[["X = 1"]]);
assert_prolog_success!(&mut wam, "?- catch(_ is (0 rdiv 0) ^ 5, error(E, _), true).",
assert_prolog_success!(&mut wam, "?- catch(_ is (0 rdiv 0) ** 5, error(E, _), true).",
[["E = evaluation_error(zero_divisor)"]]);
}