oak_jasm/builder/
mod.rs

1//! AST builder for the JASM language.
2
3use crate::{
4    ast::*,
5    language::JasmLanguage,
6    lexer::token_type::JasmTokenType,
7    parser::{JasmParser, element_type::JasmElementType},
8};
9use oak_core::{Builder, BuilderCache, GreenNode, OakDiagnostics, OakError, Parser, RedNode, RedTree, SourceText, TextEdit, source::Source};
10
11/// AST builder for the JASM language.
12#[derive(Clone)]
13pub struct JasmBuilder<'config> {
14    /// The language configuration.
15    pub config: &'config JasmLanguage,
16}
17
18impl<'config> JasmBuilder<'config> {
19    /// Creates a new `JasmBuilder`.
20    pub fn new(config: &'config JasmLanguage) -> Self {
21        Self { config }
22    }
23}
24
25impl<'config> Builder<JasmLanguage> for JasmBuilder<'config> {
26    fn build<'a, S: Source + ?Sized>(&self, source: &'a S, edits: &[TextEdit], cache: &'a mut impl BuilderCache<JasmLanguage>) -> OakDiagnostics<JasmRoot> {
27        let parser = JasmParser::new(self.config);
28
29        let parse_result = parser.parse(source, edits, cache);
30
31        match parse_result.result {
32            Ok(green_tree) => {
33                let source_text = SourceText::new(source.get_text_in((0..source.length()).into()).into_owned());
34                match self.build_root(green_tree, &source_text) {
35                    Ok(ast_root) => OakDiagnostics { result: Ok(ast_root), diagnostics: parse_result.diagnostics },
36                    Err(build_error) => {
37                        let mut diagnostics = parse_result.diagnostics;
38                        diagnostics.push(build_error.clone());
39                        OakDiagnostics { result: Err(build_error), diagnostics }
40                    }
41                }
42            }
43            Err(parse_error) => OakDiagnostics { result: Err(parse_error), diagnostics: parse_result.diagnostics },
44        }
45    }
46}
47
48impl<'config> JasmBuilder<'config> {
49    fn build_root<'a>(&self, green_tree: &'a GreenNode<'a, JasmLanguage>, source: &SourceText) -> Result<JasmRoot, OakError> {
50        let red_root = RedNode::new(green_tree, 0);
51        let mut class = None;
52
53        for child in red_root.children() {
54            if let RedTree::Node(n) = child {
55                if n.green.kind == JasmElementType::Class {
56                    class = Some(self.build_class(n, source)?);
57                }
58            }
59        }
60
61        Ok(JasmRoot { class: class.unwrap_or_else(|| JasmClass { modifiers: vec![], name: String::new(), version: None, methods: vec![], fields: vec![], source_file: None, super_class: None, interfaces: vec![], annotations: vec![], attributes: vec![] }) })
62    }
63
64    fn build_class(&self, node: RedNode<JasmLanguage>, source: &SourceText) -> Result<JasmClass, OakError> {
65        let mut modifiers = vec![];
66        let mut name = String::new();
67        let mut methods = vec![];
68        let mut fields = vec![];
69
70        for child in node.children() {
71            match child {
72                RedTree::Leaf(t) => {
73                    let text = source.get_text_in(t.span.clone().into()).to_string();
74                    match t.kind {
75                        JasmTokenType::Public | JasmTokenType::Private | JasmTokenType::Protected | JasmTokenType::Static | JasmTokenType::Final | JasmTokenType::Abstract | JasmTokenType::Synthetic | JasmTokenType::Deprecated => {
76                            modifiers.push(text);
77                        }
78                        JasmTokenType::Identifier => {
79                            name = text;
80                        }
81                        _ => {}
82                    }
83                }
84                RedTree::Node(n) => match n.green.kind {
85                    JasmElementType::Method => {
86                        methods.push(self.build_method(n, source)?);
87                    }
88                    JasmElementType::Field => {
89                        fields.push(self.build_field(n, source)?);
90                    }
91                    _ => {}
92                },
93            }
94        }
95
96        Ok(JasmClass { modifiers, name, version: None, methods, fields, source_file: None, super_class: None, interfaces: vec![], annotations: vec![], attributes: vec![] })
97    }
98
99    fn build_method(&self, node: RedNode<JasmLanguage>, source: &SourceText) -> Result<JasmMethod, OakError> {
100        let mut modifiers = vec![];
101        let mut name = String::new();
102        let mut descriptor = String::new();
103        let mut instructions = vec![];
104        let mut stack = None;
105        let mut locals = None;
106
107        for child in node.children() {
108            match child {
109                RedTree::Leaf(t) => {
110                    let text = source.get_text_in(t.span.clone().into()).to_string();
111                    match t.kind {
112                        JasmTokenType::Public
113                        | JasmTokenType::Private
114                        | JasmTokenType::Protected
115                        | JasmTokenType::Static
116                        | JasmTokenType::Final
117                        | JasmTokenType::Native
118                        | JasmTokenType::Synchronized
119                        | JasmTokenType::Synthetic
120                        | JasmTokenType::Deprecated
121                        | JasmTokenType::Varargs => {
122                            modifiers.push(text);
123                        }
124                        JasmTokenType::Identifier => {
125                            if name.is_empty() {
126                                name = text;
127                            }
128                            else if descriptor.is_empty() {
129                                descriptor = text;
130                            }
131                        }
132                        JasmTokenType::Number => {
133                            if let Ok(val) = text.parse::<u32>() {
134                                if stack.is_none() {
135                                    stack = Some(val);
136                                }
137                                else if locals.is_none() {
138                                    locals = Some(val);
139                                }
140                            }
141                        }
142                        _ => {}
143                    }
144                }
145                RedTree::Node(n) => {
146                    if n.green.kind == JasmElementType::Instruction {
147                        instructions.push(self.build_instruction(n, source)?);
148                    }
149                }
150            }
151        }
152
153        let name_and_descriptor = if descriptor.is_empty() { name } else { format!("{}{}", name, descriptor) };
154
155        Ok(JasmMethod { modifiers, name_and_descriptor, stack_size: stack, locals_count: locals, instructions, exception_handlers: vec![], annotations: vec![], attributes: vec![] })
156    }
157
158    fn build_field(&self, node: RedNode<JasmLanguage>, source: &SourceText) -> Result<JasmField, OakError> {
159        let mut modifiers = vec![];
160        let mut name = String::new();
161        let mut descriptor = String::new();
162
163        for child in node.children() {
164            if let RedTree::Leaf(t) = child {
165                let text = source.get_text_in(t.span.clone().into()).to_string();
166                match t.kind {
167                    JasmTokenType::Public | JasmTokenType::Private | JasmTokenType::Protected | JasmTokenType::Static | JasmTokenType::Final | JasmTokenType::Synthetic | JasmTokenType::Deprecated => {
168                        modifiers.push(text);
169                    }
170                    JasmTokenType::Identifier => {
171                        if name.is_empty() {
172                            name = text;
173                        }
174                        else {
175                            descriptor = text;
176                        }
177                    }
178                    _ => {}
179                }
180            }
181        }
182
183        let name_and_descriptor = if descriptor.is_empty() { name } else { format!("{} {}", name, descriptor) };
184
185        Ok(JasmField { modifiers, name_and_descriptor, annotations: vec![], attributes: vec![] })
186    }
187
188    fn build_instruction(&self, node: RedNode<JasmLanguage>, source: &SourceText) -> Result<JasmInstruction, OakError> {
189        let mut opcode = String::new();
190        let mut operands = vec![];
191
192        for child in node.children() {
193            if let RedTree::Leaf(t) = child {
194                let text = source.get_text_in(t.span.clone().into()).to_string();
195                let kind_val = t.kind as u16;
196                if kind_val >= JasmTokenType::ALoad0 as u16 && kind_val <= JasmTokenType::Pop as u16 {
197                    opcode = text;
198                }
199                else if matches!(t.kind, JasmTokenType::Identifier | JasmTokenType::Number | JasmTokenType::String) {
200                    operands.push(text);
201                }
202            }
203        }
204
205        if operands.is_empty() {
206            Ok(JasmInstruction::Simple(opcode))
207        }
208        else {
209            let argument = operands.join(" ");
210            if opcode.starts_with("invoke") {
211                Ok(JasmInstruction::MethodCall { instruction: opcode, method_ref: argument })
212            }
213            else if opcode.starts_with("get") || opcode.starts_with("put") {
214                Ok(JasmInstruction::FieldAccess { instruction: opcode, field_ref: argument })
215            }
216            else {
217                Ok(JasmInstruction::WithArgument { instruction: opcode, argument })
218            }
219        }
220    }
221}
oak_jasm/builder/mod.rs

oak_jasm/builder/
mod.rs
