meplang 0.1.8

An EVM low-level language that gives full control over the control flow of the smart contract.
Documentation 
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 pest::iterators::Pair;
use quick_impl::QuickImpl;

use super::attribute::WithAttributes;
use super::function::RFunction;
use super::variable::{RVariable, RVariableWithField};
use super::RHexAlias;
use crate::parser::parser::{get_next, map_unique_child, FromPair, Located, Rule};

#[derive(Debug, Clone, QuickImpl)]
pub enum RBlockRefStar {
    #[quick_impl(impl From)]
    Variable(RVariable),
}

impl FromPair for RBlockRefStar {
    fn from_pair(block_ref_star: Pair<Rule>) -> Result<Self, pest::error::Error<Rule>> {
        assert!(block_ref_star.as_rule() == Rule::block_ref_star);

        map_unique_child(block_ref_star, |child| match child.as_rule() {
            Rule::variable => Ok(RVariable::from_pair(child)?.into()),
            _ => unreachable!(),
        })
    }
}

#[derive(Debug, Clone, QuickImpl)]
pub enum RBlockRefEsp {
    #[quick_impl(impl From)]
    Variable(RVariable),
    #[quick_impl(impl From)]
    VariableWithField(RVariableWithField),
}

impl FromPair for RBlockRefEsp {
    fn from_pair(block_ref_esp: Pair<Rule>) -> Result<Self, pest::error::Error<Rule>> {
        assert!(block_ref_esp.as_rule() == Rule::block_ref_esp);

        map_unique_child(block_ref_esp, |child| match child.as_rule() {
            Rule::variable => Ok(RVariable::from_pair(child)?.into()),
            Rule::variable_with_field => Ok(RVariableWithField::from_pair(child)?.into()),
            _ => unreachable!(),
        })
    }
}

#[derive(Debug, Clone, QuickImpl)]
pub enum RBlockRef {
    #[quick_impl(impl From)]
    Star(RBlockRefStar),
    #[quick_impl(impl From)]
    Esp(RBlockRefEsp),
}

impl FromPair for RBlockRef {
    fn from_pair(block_ref: Pair<Rule>) -> Result<Self, pest::error::Error<Rule>> {
        assert!(block_ref.as_rule() == Rule::block_ref);

        let mut inner = block_ref.into_inner();

        let res = match inner.next().unwrap().as_rule() {
            Rule::star => RBlockRefStar::from_pair(inner.next().unwrap())?.into(),
            Rule::esp => RBlockRefEsp::from_pair(inner.next().unwrap())?.into(),
            _ => unreachable!(),
        };

        assert!(inner.next().is_none());

        Ok(res)
    }
}

#[derive(Debug, Clone, QuickImpl)]
pub enum RBlockItem {
    #[quick_impl(impl From)]
    Function(RFunction),
    #[quick_impl(impl From)]
    HexAlias(RHexAlias),
    #[quick_impl(impl From)]
    BlockRef(RBlockRef),
}

impl FromPair for RBlockItem {
    fn from_pair(block_item: Pair<Rule>) -> Result<Self, pest::error::Error<Rule>> {
        assert!(block_item.as_rule() == Rule::block_item);

        map_unique_child(block_item, |child| match child.as_rule() {
            Rule::function => Ok(RFunction::from_pair(child)?.into()),
            Rule::hex_alias => Ok(RHexAlias::from_pair(child)?.into()),
            Rule::block_ref => Ok(RBlockRef::from_pair(child)?.into()),
            _ => unreachable!(),
        })
    }
}

#[derive(Debug, Clone)]
pub struct RBlock {
    pub name: Located<RVariable>,
    pub abstr: bool,
    pub items: Vec<Located<WithAttributes<Located<RBlockItem>>>>,
}

impl RBlock {
    pub fn name_str(&self) -> &str {
        self.name.as_str()
    }
}

impl FromPair for RBlock {
    fn from_pair(block_decl: Pair<Rule>) -> Result<Self, pest::error::Error<Rule>> {
        assert!(block_decl.as_rule() == Rule::block_decl);

        let mut block_decl_inner = block_decl.into_inner();

        let abstr = match block_decl_inner.next().unwrap().as_rule() {
            Rule::block_keyword => false,
            Rule::abstract_keyword => {
                _ = get_next(&mut block_decl_inner, Rule::block_keyword);
                true
            },
            _ => unreachable!(),
        };

        let name = Located::<RVariable>::from_pair(get_next(&mut block_decl_inner, Rule::variable))?;

        _ = get_next(&mut block_decl_inner, Rule::open_brace);

        let mut items = Vec::<Located<WithAttributes<Located<RBlockItem>>>>::new();
        while let Some(block_item_with_attr) = block_decl_inner.next() {
            match block_item_with_attr.as_rule() {
                Rule::block_item_with_attr => {
                    items.push(Located::<WithAttributes<Located<RBlockItem>>>::from_pair(
                        block_item_with_attr,
                    )?);
                },
                Rule::close_brace => {
                    assert!(block_decl_inner.next() == None);
                    return Ok(RBlock { name, abstr, items });
                },
                _ => unreachable!(),
            }
        }
        unreachable!();
    }
}