bulletml 0.2.1

BulletML library in Rust
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
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181

use indextree::{Arena, NodeId};
use std::collections::HashMap;

#[derive(Debug, Clone, Copy)]
pub enum BulletMLExpression {
    Const(f64),
    Expr(fasteval::ExpressionI),
}

#[derive(Debug)]
pub enum BulletMLNode {
    BulletML {
        bml_type: Option<BulletMLType>,
    },

    Bullet(Option<String>),
    Action(Option<String>),
    Fire(Option<String>),

    ChangeDirection,
    ChangeSpeed,

    Accel,

    Wait(BulletMLExpression),

    Vanish,

    Repeat,

    Direction {
        dir_type: Option<DirectionType>,
        dir: BulletMLExpression,
    },

    Speed {
        spd_type: Option<SpeedType>,
        spd: BulletMLExpression,
    },

    Horizontal {
        h_type: HVType,
        h: BulletMLExpression,
    },
    Vertical {
        v_type: HVType,
        v: BulletMLExpression,
    },

    Term(BulletMLExpression),

    Times(BulletMLExpression),

    BulletRef(String),
    ActionRef(String),
    FireRef(String),

    Param(BulletMLExpression),
}

#[derive(Debug, PartialEq, Eq, Clone, Copy)]
pub enum BulletMLType {
    Vertical,
    Horizontal,
}

#[derive(Debug, PartialEq, Eq, Clone, Copy)]
pub enum DirectionType {
    Aim,
    Absolute,
    Relative,
    Sequence,
}

#[derive(Debug, PartialEq, Eq, Clone, Copy)]
pub enum SpeedType {
    Absolute,
    Relative,
    Sequence,
}

#[derive(Debug, PartialEq, Eq, Clone, Copy)]
pub enum HVType {
    Absolute,
    Relative,
    Sequence,
}

impl BulletMLNode {
    pub fn is_top_action(&self) -> bool {
        if let BulletMLNode::Action(Some(label)) = self {
            label.starts_with("top")
        } else {
            false
        }
    }

    pub fn match_any_action(&self) -> Option<()> {
        match self {
            BulletMLNode::Action { .. } | BulletMLNode::ActionRef(..) => Some(()),
            _ => None,
        }
    }

    pub fn match_any_bullet(&self) -> Option<()> {
        match self {
            BulletMLNode::Bullet { .. } | BulletMLNode::BulletRef(..) => Some(()),
            _ => None,
        }
    }

    pub fn match_direction(&self) -> Option<(Option<DirectionType>, BulletMLExpression)> {
        if let BulletMLNode::Direction { dir_type, dir } = self {
            Some((*dir_type, *dir))
        } else {
            None
        }
    }

    pub fn match_speed(&self) -> Option<(Option<SpeedType>, BulletMLExpression)> {
        if let BulletMLNode::Speed { spd_type, spd } = self {
            Some((*spd_type, *spd))
        } else {
            None
        }
    }

    pub fn match_horizontal(&self) -> Option<(HVType, BulletMLExpression)> {
        if let BulletMLNode::Horizontal { h_type, h } = self {
            Some((*h_type, *h))
        } else {
            None
        }
    }

    pub fn match_vertical(&self) -> Option<(HVType, BulletMLExpression)> {
        if let BulletMLNode::Vertical { v_type, v } = self {
            Some((*v_type, *v))
        } else {
            None
        }
    }

    pub fn match_term(&self) -> Option<BulletMLExpression> {
        if let BulletMLNode::Term(term) = self {
            Some(*term)
        } else {
            None
        }
    }

    pub fn match_times(&self) -> Option<BulletMLExpression> {
        if let BulletMLNode::Times(times) = self {
            Some(*times)
        } else {
            None
        }
    }
}

/// Parsed representation of a BulletML document, ready to use by a [Runner](struct.Runner.html).
#[derive(Debug)]
pub struct BulletML {
    pub arena: Arena<BulletMLNode>,
    pub root: NodeId,
    pub bullet_refs: HashMap<String, NodeId>,
    pub action_refs: HashMap<String, NodeId>,
    pub fire_refs: HashMap<String, NodeId>,
    pub expr_slab: fasteval::Slab,
}

impl BulletML {
    pub(crate) fn get_type(&self) -> Option<BulletMLType> {
        let root_node = &self.arena[self.root];
        if let BulletMLNode::BulletML { bml_type } = root_node.get() {
            *bml_type
        } else {
            panic!("Root node should be of type BulletML");
        }
    }
}