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

use crate::{
    error::Error,
    model::{Identifier, Span},
};

#[cfg(feature = "serde")]
use serde::{Deserialize, Serialize};

// ------------------------------------------------------------------------------------------------
// Public Types ❱ Constraints
// ------------------------------------------------------------------------------------------------

/// Corresponds to the grammar rule `constraint`.
#[derive(Clone, Debug)]
#[cfg_attr(feature = "serde", derive(Deserialize, Serialize))]
pub struct Constraint {
    span: Option<Span>,
    name: Identifier,
    body: ConstraintBody,
}

///
/// Corresponds to the field `body` in the grammar rule `constraint`.
///
/// # Semantics
///
/// The domain of discourse, $\mathbb{D}$, is the set of all definitions present in the current
/// module and the set of modules transitively imported by it.
///
#[derive(Clone, Debug)]
#[cfg_attr(feature = "serde", derive(Deserialize, Serialize))]
pub enum ConstraintBody {
    /// Corresponds to the grammar rule `informal_constraint`.
    Informal(ControlledLanguageString),
    /// Corresponds to the grammar rule `formal_constraint`.
    Formal(FormalConstraint),
}

// ------------------------------------------------------------------------------------------------
// Public Functions
// ------------------------------------------------------------------------------------------------

// ------------------------------------------------------------------------------------------------
// Private Macros
// ------------------------------------------------------------------------------------------------

// ------------------------------------------------------------------------------------------------
// Private Types
// ------------------------------------------------------------------------------------------------

// ------------------------------------------------------------------------------------------------
// Implementations ❱ Constraints
// ------------------------------------------------------------------------------------------------

impl_has_body_for!(Constraint, ConstraintBody);

impl_has_name_for!(Constraint);

impl_has_source_span_for!(Constraint);

impl_references_for!(Constraint => delegate body);

impl Validate for Constraint {
    fn is_complete(&self, _top: &Module) -> Result<bool, Error> {
        // TODO: is this correct?
        Ok(true)
    }

    fn is_valid(&self, check_constraints: bool, _top: &Module) -> Result<bool, Error> {
        if check_constraints {
            todo!()
        } else {
            Ok(true)
        }
    }
}

impl Constraint {
    // --------------------------------------------------------------------------------------------
    // Constructors
    // --------------------------------------------------------------------------------------------

    pub fn new<B>(name: Identifier, body: B) -> Self
    where
        B: Into<ConstraintBody>,
    {
        Self {
            span: None,
            name,
            body: body.into(),
        }
    }
}

// ------------------------------------------------------------------------------------------------

impl From<ControlledLanguageString> for ConstraintBody {
    fn from(v: ControlledLanguageString) -> Self {
        Self::Informal(v)
    }
}

impl From<FormalConstraint> for ConstraintBody {
    fn from(v: FormalConstraint) -> Self {
        Self::Formal(v)
    }
}

impl_references_for!(ConstraintBody => variants Informal, Formal);

impl_validate_for!(ConstraintBody => variants Informal, Formal);

impl ConstraintBody {
    // --------------------------------------------------------------------------------------------
    // Variants
    // --------------------------------------------------------------------------------------------

    is_as_variant!(Informal (ControlledLanguageString) => is_informal, as_informal);

    is_as_variant!(Formal (FormalConstraint) => is_formal, as_formal);
}

// ------------------------------------------------------------------------------------------------
// Private Functions
// ------------------------------------------------------------------------------------------------

// ------------------------------------------------------------------------------------------------
// Modules
// ------------------------------------------------------------------------------------------------

mod formal;
pub use formal::{
    AtomicSentence, BinaryBooleanSentence, BooleanSentence, ConnectiveOperator, ConstraintSentence,
    EnvironmentDef, EnvironmentDefBody, Equation, FormalConstraint, FunctionCardinality,
    FunctionComposition, FunctionDef, FunctionParameter, FunctionSignature, FunctionType,
    FunctionTypeReference, FunctionTypeReferenceInner, FunctionalTerm, InequalityRelation,
    Inequation, MappingVariable, NamedVariables, PredicateSequenceMember, PredicateValue,
    QuantifiedSentence, QuantifiedVariable, QuantifiedVariableBinding, Quantifier, SequenceBuilder,
    SequenceOfPredicateValues, SimpleSentence, Subject, Term, UnaryBooleanSentence, Variables,
};

mod informal;
pub use informal::{ControlledLanguageString, ControlledLanguageTag};

use super::{check::Validate, modules::Module};