1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
//! Provides parsers for timed effects.
use crate::parsers::{parens, prefix_expr, ParseResult, Span};
use crate::parsers::{
parse_assign_op_t, parse_effect_condition, parse_f_assign_da, parse_f_exp_t, parse_f_head,
parse_time_specifier,
};
use crate::types::TimedEffect;
use nom::branch::alt;
use nom::character::complete::multispace1;
use nom::combinator::map;
use nom::sequence::preceded;
use nom::Parser;
/// Parses timed effects.
///
/// ## Example
/// ```
/// # use pddl::parsers::{parse_timed_effect, preamble::*};
/// # use pddl::{AssignOp, TimedAssignOperator, AtomicFormula, EffectCondition, EqualityAtomicFormula, DurativeActionFunctionAssignment, DurativeActionFluentExpression, FunctionHead, PrimitiveEffect, Term, TimedEffect, TimedFluentExpression, TimeSpecifier};
/// # use pddl::DurativeActionFluentExpression::Duration;
/// assert!(parse_timed_effect("(at start (= x y))").is_value(
/// TimedEffect::new_conditional(
/// TimeSpecifier::Start,
/// EffectCondition::new(
/// PrimitiveEffect::AtomicFormula(AtomicFormula::Equality(
/// EqualityAtomicFormula::new(
/// Term::Name("x".into()),
/// Term::Name("y".into()))
/// )
/// )
/// )
/// )
/// ));
///
/// assert!(parse_timed_effect("(at end (assign fun-sym ?duration))").is_value(
/// TimedEffect::new_fluent(
/// TimeSpecifier::End,
/// DurativeActionFunctionAssignment::new(
/// AssignOp::Assign,
/// FunctionHead::Simple("fun-sym".into()),
/// DurativeActionFluentExpression::Duration
/// )
/// )
/// ));
///
/// assert!(parse_timed_effect("(increase fun-sym #t)").is_value(
/// TimedEffect::new_continuous(
/// TimedAssignOperator::Increase,
/// FunctionHead::Simple("fun-sym".into()),
/// TimedFluentExpression::Now
/// )
/// ));
/// ```
pub fn parse_timed_effect<'a, T: Into<Span<'a>>>(input: T) -> ParseResult<'a, TimedEffect> {
let cond = map(
prefix_expr(
"at",
(
parse_time_specifier,
preceded(multispace1, parse_effect_condition),
),
),
TimedEffect::from,
);
// :numeric-fluents
let fluent = map(
prefix_expr(
"at",
(
parse_time_specifier,
preceded(multispace1, parse_f_assign_da),
),
),
TimedEffect::from,
);
// :continuous-effects + :numeric-fluents
let continuous = map(
parens((
parse_assign_op_t,
preceded(multispace1, parse_f_head),
preceded(multispace1, parse_f_exp_t),
)),
TimedEffect::from,
);
alt((fluent, cond, continuous)).parse(input.into())
}
/// Alias for [`parse_timed_effect`].
#[deprecated(since = "0.2.0", note = "Use `parse_timed_effect` instead")]
pub fn parse_timed_eff<'a, T: Into<Span<'a>>>(input: T) -> ParseResult<'a, TimedEffect> {
parse_timed_effect(input)
}
impl crate::parsers::Parser for TimedEffect {
type Item = TimedEffect;
/// See [`parse_timed_effect`].
fn parse<'a, S: Into<Span<'a>>>(input: S) -> ParseResult<'a, Self::Item> {
parse_timed_effect(input)
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::parsers::UnwrapValue;
use crate::{
AssignOp, AtomicFormula, DurativeActionFluentExpression, DurativeActionFunctionAssignment,
EffectCondition, EqualityAtomicFormula, FunctionHead, Parser, PrimitiveEffect, Term,
TimeSpecifier, TimedAssignOperator, TimedFluentExpression,
};
#[test]
fn it_works() {
let input = "(at end (increase (distance-travelled) 5))";
let (_, _effect) = parse_timed_effect(Span::new(input)).unwrap();
}
#[test]
fn test_parse() {
assert!(
TimedEffect::parse("(at start (= x y))").is_value(TimedEffect::conditional(
TimeSpecifier::Start,
EffectCondition::new(PrimitiveEffect::AtomicFormula(AtomicFormula::Equality(
EqualityAtomicFormula::new(Term::Name("x".into()), Term::Name("y".into()))
)))
))
);
assert!(
TimedEffect::parse("(at end (assign fun-sym ?duration))").is_value(
TimedEffect::fluent(
TimeSpecifier::End,
DurativeActionFunctionAssignment::new(
AssignOp::Assign,
FunctionHead::Simple("fun-sym".into()),
DurativeActionFluentExpression::Duration
)
)
)
);
assert!(
TimedEffect::parse("(increase fun-sym #t)").is_value(TimedEffect::continuous(
TimedAssignOperator::Increase,
FunctionHead::Simple("fun-sym".into()),
TimedFluentExpression::Now
))
);
}
}