Mercurial > python-compiler.rs
annotate src/ast_convert.rs @ 6:6f2bf13f4cb5
Add ast.While and ast.Break.
| author | Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> |
|---|---|
| date | Tue, 31 May 2016 04:22:35 +0100 |
| parents | ddf372373a77 |
| children | 680d15073f55 |
| rev | line source |
|---|---|
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ddf372373a77
Add ast.For, ast.UnaryOp, and Sub and Div to ast.BinOp.
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1 use python_ast::{Module, Statement, Expr, BinOp, UnaryOp}; |
| 0 | 2 |
| 3 use cpython::{Python, PyObject}; | |
| 4 use cpython::ObjectProtocol; //for call method | |
| 5 | |
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6 fn get_str(py: Python, object: PyObject) -> String { |
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7 let pystring = object.str(py).unwrap(); |
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8 let mut string = pystring.to_string(py).unwrap(); |
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9 string.to_mut().to_string() |
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10 } |
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11 |
| 0 | 12 fn parse_expr_vec(py: Python, ast: PyObject) -> Vec<Expr> { |
| 13 let builtins_module = py.import("builtins").unwrap(); | |
| 14 let isinstance = builtins_module.get(py, "isinstance").unwrap(); | |
| 15 | |
| 16 let is_instance = |object: &PyObject, type_: &PyObject| { | |
| 17 return isinstance.call(py, (object, type_), None).unwrap().is_true(py).unwrap(); | |
| 18 }; | |
| 19 | |
| 20 let ast_module = py.import("ast").unwrap(); | |
| 21 let ast_type = ast_module.get(py, "AST").unwrap(); | |
| 22 let arguments_type = ast_module.get(py, "arguments").unwrap(); | |
| 23 | |
| 24 assert!(is_instance(&ast, &ast_type)); | |
| 25 | |
| 26 if is_instance(&ast, &arguments_type) { | |
| 27 let args = ast.getattr(py, "args").unwrap(); | |
| 28 let mut arguments = vec!(); | |
| 29 for arg in args.iter(py).unwrap() { | |
| 30 let arg = parse_expr(py, arg.unwrap()); | |
| 31 arguments.push(arg); | |
| 32 } | |
| 33 arguments | |
| 34 } else { | |
| 35 vec!(Expr::Error) | |
| 36 } | |
| 37 } | |
| 38 | |
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39 fn parse_unaryop(py: Python, ast: PyObject) -> UnaryOp { |
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40 let builtins_module = py.import("builtins").unwrap(); |
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41 let isinstance = builtins_module.get(py, "isinstance").unwrap(); |
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42 |
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43 let is_instance = |object: &PyObject, type_: &PyObject| { |
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44 return isinstance.call(py, (object, type_), None).unwrap().is_true(py).unwrap(); |
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45 }; |
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46 |
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47 let ast_module = py.import("ast").unwrap(); |
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48 let ast_type = ast_module.get(py, "AST").unwrap(); |
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49 let uadd_type = ast_module.get(py, "UAdd").unwrap(); |
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50 let usub_type = ast_module.get(py, "USub").unwrap(); |
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51 |
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52 assert!(is_instance(&ast, &ast_type)); |
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53 |
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54 if is_instance(&ast, &uadd_type) { |
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55 UnaryOp::UAdd |
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56 } else if is_instance(&ast, &usub_type) { |
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57 UnaryOp::USub |
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58 } else { |
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59 println!("UnaryOp {}", ast); |
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60 UnaryOp::Error |
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61 } |
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62 } |
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63 |
| 0 | 64 fn parse_binop(py: Python, ast: PyObject) -> BinOp { |
| 65 let builtins_module = py.import("builtins").unwrap(); | |
| 66 let isinstance = builtins_module.get(py, "isinstance").unwrap(); | |
| 67 | |
| 68 let is_instance = |object: &PyObject, type_: &PyObject| { | |
| 69 return isinstance.call(py, (object, type_), None).unwrap().is_true(py).unwrap(); | |
| 70 }; | |
| 71 | |
| 72 let ast_module = py.import("ast").unwrap(); | |
| 73 let ast_type = ast_module.get(py, "AST").unwrap(); | |
| 74 let add_type = ast_module.get(py, "Add").unwrap(); | |
| 75 let mult_type = ast_module.get(py, "Mult").unwrap(); | |
| 76 let eq_type = ast_module.get(py, "Eq").unwrap(); | |
| 77 let lt_type = ast_module.get(py, "Lt").unwrap(); | |
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78 let gt_type = ast_module.get(py, "Gt").unwrap(); |
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79 let sub_type = ast_module.get(py, "Sub").unwrap(); |
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80 let div_type = ast_module.get(py, "Div").unwrap(); |
| 0 | 81 |
| 82 assert!(is_instance(&ast, &ast_type)); | |
| 83 | |
| 84 if is_instance(&ast, &add_type) { | |
| 85 BinOp::BinAdd | |
| 86 } else if is_instance(&ast, &mult_type) { | |
| 87 BinOp::BinMult | |
| 88 } else if is_instance(&ast, &eq_type) { | |
| 89 BinOp::BinEq | |
| 90 } else if is_instance(&ast, <_type) { | |
| 91 BinOp::BinLt | |
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92 } else if is_instance(&ast, >_type) { |
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93 BinOp::BinGt |
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94 } else if is_instance(&ast, &sub_type) { |
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95 BinOp::Sub |
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96 } else if is_instance(&ast, &div_type) { |
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97 BinOp::Div |
| 0 | 98 } else { |
| 99 println!("BinOp {}", ast); | |
| 100 BinOp::Error | |
| 101 } | |
| 102 } | |
| 103 | |
| 104 fn parse_expr(py: Python, ast: PyObject) -> Expr { | |
| 105 let builtins_module = py.import("builtins").unwrap(); | |
| 106 let isinstance = builtins_module.get(py, "isinstance").unwrap(); | |
| 107 | |
| 108 let is_instance = |object: &PyObject, type_: &PyObject| { | |
| 109 return isinstance.call(py, (object, type_), None).unwrap().is_true(py).unwrap(); | |
| 110 }; | |
| 111 | |
| 112 let ast_module = py.import("ast").unwrap(); | |
| 113 let ast_type = ast_module.get(py, "AST").unwrap(); | |
| 114 let arg_type = ast_module.get(py, "arg").unwrap(); | |
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115 let unary_op_type = ast_module.get(py, "UnaryOp").unwrap(); |
| 0 | 116 let bin_op_type = ast_module.get(py, "BinOp").unwrap(); |
| 117 let name_constant_type = ast_module.get(py, "NameConstant").unwrap(); | |
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118 let attribute_type = ast_module.get(py, "Attribute").unwrap(); |
| 0 | 119 let name_type = ast_module.get(py, "Name").unwrap(); |
| 120 let num_type = ast_module.get(py, "Num").unwrap(); | |
| 121 let str_type = ast_module.get(py, "Str").unwrap(); | |
| 122 let compare_type = ast_module.get(py, "Compare").unwrap(); | |
| 123 let call_type = ast_module.get(py, "Call").unwrap(); | |
| 124 let alias_type = ast_module.get(py, "alias").unwrap(); | |
| 125 | |
| 126 assert!(is_instance(&ast, &ast_type)); | |
| 127 | |
| 128 if is_instance(&ast, &arg_type) { | |
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129 let arg = ast.getattr(py, "arg").unwrap(); |
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130 let arg = get_str(py, arg); |
| 0 | 131 Expr::Name(arg) |
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132 } else if is_instance(&ast, &attribute_type) { |
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133 let value = ast.getattr(py, "value").unwrap(); |
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134 let attr = ast.getattr(py, "attr").unwrap(); |
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135 |
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136 let value = parse_expr(py, value); |
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137 let attr = get_str(py, attr); |
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138 |
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139 Expr::Attribute(Box::new(value), attr) |
| 0 | 140 } else if is_instance(&ast, &name_type) { |
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141 let id = ast.getattr(py, "id").unwrap(); |
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142 let id = get_str(py, id); |
| 0 | 143 Expr::Name(id) |
| 144 } else if is_instance(&ast, &name_constant_type) { | |
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145 let value = ast.getattr(py, "value").unwrap(); |
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146 let value = get_str(py, value); |
| 0 | 147 Expr::NameConstant(value) |
| 148 } else if is_instance(&ast, &num_type) { | |
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149 let n = ast.getattr(py, "n").unwrap(); |
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150 let n = get_str(py, n); |
| 0 | 151 Expr::Num(n) |
| 152 } else if is_instance(&ast, &str_type) { | |
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153 let s = ast.getattr(py, "s").unwrap(); |
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154 let s = get_str(py, s); |
| 0 | 155 Expr::Str(s) |
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156 } else if is_instance(&ast, &unary_op_type) { |
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157 let op = ast.getattr(py, "op").unwrap(); |
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158 let operand = ast.getattr(py, "operand").unwrap(); |
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159 |
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160 let op = parse_unaryop(py, op); |
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161 let operand = parse_expr(py, operand); |
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162 |
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163 Expr::UnaryOp(op, Box::new(operand)) |
| 0 | 164 } else if is_instance(&ast, &bin_op_type) { |
| 165 let left = ast.getattr(py, "left").unwrap(); | |
| 166 let op = ast.getattr(py, "op").unwrap(); | |
| 167 let right = ast.getattr(py, "right").unwrap(); | |
| 168 | |
| 169 let left = parse_expr(py, left); | |
| 170 let op = parse_binop(py, op); | |
| 171 let right = parse_expr(py, right); | |
| 172 | |
| 173 Expr::BinOp(Box::new(left), op, Box::new(right)) | |
| 174 } else if is_instance(&ast, &call_type) { | |
| 175 let func = ast.getattr(py, "func").unwrap(); | |
| 176 let args = ast.getattr(py, "args").unwrap(); | |
| 177 //let keywords = ast.getattr(py, "keywords").unwrap(); | |
| 178 | |
| 179 let func = parse_expr(py, func); | |
| 180 | |
| 181 let mut arguments = vec!(); | |
| 182 for arg in args.iter(py).unwrap() { | |
| 183 let arg = arg.unwrap(); | |
| 184 arguments.push(parse_expr(py, arg)); | |
| 185 } | |
| 186 | |
| 187 Expr::Call(Box::new(func), arguments) | |
| 188 } else if is_instance(&ast, &alias_type) { | |
| 189 let name = ast.getattr(py, "name").unwrap(); | |
| 190 let asname = ast.getattr(py, "asname").unwrap(); | |
| 191 | |
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192 let name = get_str(py, name); |
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193 let asname = if asname == py.None() { |
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194 None |
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195 } else { |
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196 Some(get_str(py, asname)) |
| 0 | 197 }; |
| 198 | |
| 199 Expr::Alias(name, asname) | |
| 200 } else if is_instance(&ast, &compare_type) { | |
| 201 let left = ast.getattr(py, "left").unwrap(); | |
| 202 let ops = ast.getattr(py, "ops").unwrap(); | |
| 203 let comparators = ast.getattr(py, "comparators").unwrap(); | |
| 204 | |
| 205 let left = parse_expr(py, left); | |
| 206 let ops = ops.iter(py).unwrap(); | |
| 207 let comparators = comparators.iter(py).unwrap(); | |
| 208 | |
| 209 let mut new_ops = vec!(); | |
| 210 for op in ops { | |
| 211 let op = op.unwrap(); | |
| 212 let op = parse_binop(py, op); | |
| 213 new_ops.push(op); | |
| 214 } | |
| 215 | |
| 216 let mut new_comparators = vec!(); | |
| 217 for comparator in comparators { | |
| 218 let comparator = comparator.unwrap(); | |
| 219 let comparator = parse_expr(py, comparator); | |
| 220 new_comparators.push(comparator); | |
| 221 } | |
| 222 | |
| 223 Expr::Compare(Box::new(left), new_ops, new_comparators) | |
| 224 } else { | |
| 225 println!("Expr {}", ast); | |
| 226 Expr::Error | |
| 227 } | |
| 228 } | |
| 229 | |
| 230 fn parse_statement(py: Python, ast: PyObject) -> Statement { | |
| 231 //Statement::FunctionDef(Expr::Name("function".to_string()), vec!(Expr::Name("a".to_string()), Expr::Name("b".to_string())), vec!()) | |
| 232 //Statement::If(Expr::BinOp(BinOp::BinEq, Box::new(Expr::Name("__name__".to_string())), Box::new(Expr::Str("__main__".to_string()))), vec!(Statement::Expr(Expr::Call(Box::new(Expr::Name("function".to_string())), vec!(Expr::Num(1), Expr::Num(2)))))) | |
| 233 | |
| 234 let builtins_module = py.import("builtins").unwrap(); | |
| 235 let isinstance = builtins_module.get(py, "isinstance").unwrap(); | |
| 236 | |
| 237 let is_instance = |object: &PyObject, type_: &PyObject| { | |
| 238 return isinstance.call(py, (object, type_), None).unwrap().is_true(py).unwrap(); | |
| 239 }; | |
| 240 | |
| 241 let ast_module = py.import("ast").unwrap(); | |
| 242 let ast_type = ast_module.get(py, "AST").unwrap(); | |
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243 let class_def_type = ast_module.get(py, "ClassDef").unwrap(); |
| 0 | 244 let function_def_type = ast_module.get(py, "FunctionDef").unwrap(); |
| 245 let global_type = ast_module.get(py, "Global").unwrap(); | |
| 246 let assign_type = ast_module.get(py, "Assign").unwrap(); | |
| 247 let return_type = ast_module.get(py, "Return").unwrap(); | |
| 248 let import_from_type = ast_module.get(py, "ImportFrom").unwrap(); | |
| 249 let if_type = ast_module.get(py, "If").unwrap(); | |
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250 let while_type = ast_module.get(py, "While").unwrap(); |
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251 let for_type = ast_module.get(py, "For").unwrap(); |
| 0 | 252 let expr_type = ast_module.get(py, "Expr").unwrap(); |
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253 let break_type = ast_module.get(py, "Break").unwrap(); |
| 0 | 254 |
| 255 assert!(is_instance(&ast, &ast_type)); | |
| 256 | |
| 257 /* | |
| 258 // TODO: implement Hash for PyObject. (trivial) | |
| 259 let map = { | |
| 260 let fields = ast.getattr(py, "_fields").unwrap(); | |
| 261 let mut map = HashMap::new(); | |
| 262 for field in fields.iter(py).unwrap() { | |
| 263 let field = field.unwrap(); | |
| 264 let value = ast.getattr(py, field).unwrap(); | |
| 265 map.insert(field, value); | |
| 266 } | |
| 267 map | |
| 268 }; | |
| 269 */ | |
| 270 | |
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271 if is_instance(&ast, &class_def_type) { |
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272 let name = ast.getattr(py, "name").unwrap(); |
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273 let bases = ast.getattr(py, "bases").unwrap(); |
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274 //let keywords = ast.getattr(py, "keywords").unwrap(); |
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275 let body = ast.getattr(py, "body").unwrap(); |
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276 //let decorator_list = ast.getattr(py, "decorator_list").unwrap(); |
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277 |
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278 let name = get_str(py, name); |
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279 |
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280 let mut nodes = vec!(); |
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281 for name_node in bases.iter(py).unwrap() { |
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282 let name_node = name_node.unwrap(); |
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283 let name_node = parse_expr(py, name_node); |
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284 nodes.push(name_node); |
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285 } |
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286 |
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287 let mut statements = vec!(); |
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288 for statement in body.iter(py).unwrap() { |
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289 let statement = statement.unwrap(); |
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290 let statement = parse_statement(py, statement); |
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291 statements.push(statement); |
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292 } |
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293 |
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294 Statement::ClassDef(name, nodes, statements) |
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295 } else if is_instance(&ast, &function_def_type) { |
| 0 | 296 let name = ast.getattr(py, "name").unwrap(); |
| 297 let args = ast.getattr(py, "args").unwrap(); | |
| 298 let body = ast.getattr(py, "body").unwrap(); | |
| 299 | |
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300 let name = get_str(py, name); |
| 0 | 301 let args = parse_expr_vec(py, args); |
| 302 /* | |
| 303 let mut arguments = vec!(); | |
| 304 for arg in args.iter(py).unwrap() { | |
| 305 let arg = parse_expr(py, arg.unwrap()); | |
| 306 arguments.push(arg); | |
| 307 } | |
| 308 */ | |
| 309 | |
| 310 let mut statements = vec!(); | |
| 311 for statement in body.iter(py).unwrap() { | |
| 312 let statement = parse_statement(py, statement.unwrap()); | |
| 313 statements.push(statement); | |
| 314 } | |
| 315 | |
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316 Statement::FunctionDef(name, args, statements) |
| 0 | 317 } else if is_instance(&ast, &global_type) { |
| 318 let names = ast.getattr(py, "names").unwrap(); | |
| 319 | |
| 320 let mut globals = vec!(); | |
| 321 for name in names.iter(py).unwrap() { | |
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322 let name = name.unwrap(); |
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323 let name = get_str(py, name); |
| 0 | 324 globals.push(name); |
| 325 } | |
| 326 | |
| 327 Statement::Global(globals) | |
| 328 } else if is_instance(&ast, &if_type) { | |
| 329 let test = ast.getattr(py, "test").unwrap(); | |
| 330 let body = ast.getattr(py, "body").unwrap(); | |
| 331 let orelse = ast.getattr(py, "orelse").unwrap(); | |
| 332 | |
| 333 let test = parse_expr(py, test); | |
| 334 | |
| 335 let mut statements = vec!(); | |
| 336 for statement in body.iter(py).unwrap() { | |
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337 let statement = statement.unwrap(); |
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338 let statement = parse_statement(py, statement); |
| 0 | 339 statements.push(statement); |
| 340 } | |
| 341 | |
| 342 let mut orelse_ = vec!(); | |
| 343 for statement in orelse.iter(py).unwrap() { | |
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344 let statement = statement.unwrap(); |
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345 let statement = parse_statement(py, statement); |
| 0 | 346 orelse_.push(statement); |
| 347 } | |
| 348 | |
| 349 Statement::If(test, statements, orelse_) | |
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350 } else if is_instance(&ast, &while_type) { |
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351 let test = ast.getattr(py, "test").unwrap(); |
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352 let body = ast.getattr(py, "body").unwrap(); |
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353 let orelse = ast.getattr(py, "orelse").unwrap(); |
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354 |
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355 let test = parse_expr(py, test); |
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356 |
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357 let mut statements = vec!(); |
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358 for statement in body.iter(py).unwrap() { |
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359 let statement = statement.unwrap(); |
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360 let statement = parse_statement(py, statement); |
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361 statements.push(statement); |
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362 } |
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363 |
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364 let mut orelse_ = vec!(); |
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365 for statement in orelse.iter(py).unwrap() { |
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366 let statement = statement.unwrap(); |
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367 let statement = parse_statement(py, statement); |
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368 orelse_.push(statement); |
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369 } |
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370 |
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371 Statement::While(test, statements, orelse_) |
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372 } else if is_instance(&ast, &for_type) { |
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373 let target = ast.getattr(py, "target").unwrap(); |
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374 let iter = ast.getattr(py, "iter").unwrap(); |
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375 let body = ast.getattr(py, "body").unwrap(); |
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376 let orelse = ast.getattr(py, "orelse").unwrap(); |
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377 |
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378 let target = parse_expr(py, target); |
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379 let iter = parse_expr(py, iter); |
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380 |
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381 let mut statements = vec!(); |
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382 for statement in body.iter(py).unwrap() { |
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383 let statement = statement.unwrap(); |
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384 let statement = parse_statement(py, statement); |
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385 statements.push(statement); |
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386 } |
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387 |
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388 let mut orelse_ = vec!(); |
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389 for statement in orelse.iter(py).unwrap() { |
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390 let statement = statement.unwrap(); |
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391 let statement = parse_statement(py, statement); |
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392 orelse_.push(statement); |
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393 } |
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394 |
|
ddf372373a77
Add ast.For, ast.UnaryOp, and Sub and Div to ast.BinOp.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
4
diff
changeset
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395 Statement::For(target, iter, statements, orelse_) |
| 0 | 396 } else if is_instance(&ast, &assign_type) { |
| 397 let targets = ast.getattr(py, "targets").unwrap(); | |
| 398 let value = ast.getattr(py, "value").unwrap(); | |
| 399 | |
| 400 let mut arguments = vec!(); | |
| 401 for target in targets.iter(py).unwrap() { | |
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1
b90e49ab734b
Factorise conversion of Python str into Rust String.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
0
diff
changeset
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402 let target = target.unwrap(); |
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b90e49ab734b
Factorise conversion of Python str into Rust String.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
0
diff
changeset
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403 let target = parse_expr(py, target); |
| 0 | 404 arguments.push(target); |
| 405 } | |
| 406 | |
| 407 let value = parse_expr(py, value); | |
| 408 | |
| 409 Statement::Assign(arguments, value) | |
| 410 } else if is_instance(&ast, &import_from_type) { | |
| 411 let module = ast.getattr(py, "module").unwrap(); | |
| 412 let names = ast.getattr(py, "names").unwrap(); | |
| 413 //let level = ast.getattr(py, "level").unwrap(); | |
| 414 | |
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1
b90e49ab734b
Factorise conversion of Python str into Rust String.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
0
diff
changeset
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415 let module = get_str(py, module); |
| 0 | 416 |
| 417 let mut names_ = vec!(); | |
| 418 for alias in names.iter(py).unwrap() { | |
| 419 let alias = alias.unwrap(); | |
| 420 let alias = parse_expr(py, alias); | |
| 421 names_.push(alias); | |
| 422 } | |
| 423 | |
| 424 Statement::ImportFrom(module, names_) | |
| 425 } else if is_instance(&ast, &return_type) { | |
| 426 let value = ast.getattr(py, "value").unwrap(); | |
| 427 let value = parse_expr(py, value); | |
| 428 Statement::Return(value) | |
| 429 } else if is_instance(&ast, &expr_type) { | |
| 430 let value = ast.getattr(py, "value").unwrap(); | |
| 431 let value = parse_expr(py, value); | |
| 432 Statement::Expr(value) | |
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6
6f2bf13f4cb5
Add ast.While and ast.Break.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
5
diff
changeset
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433 } else if is_instance(&ast, &break_type) { |
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6f2bf13f4cb5
Add ast.While and ast.Break.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
5
diff
changeset
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434 Statement::Break |
| 0 | 435 } else { |
| 436 println!("Statement {}", ast); | |
| 437 Statement::Error | |
| 438 } | |
| 439 } | |
| 440 | |
| 441 #[allow(dead_code)] | |
| 442 pub fn convert_ast(name: String, module: &PyObject) -> Module { | |
| 443 let gil = Python::acquire_gil(); | |
| 444 let py = gil.python(); | |
| 445 | |
| 446 let builtins_module = py.import("builtins").unwrap(); | |
| 447 let isinstance = builtins_module.get(py, "isinstance").unwrap(); | |
| 448 | |
| 449 let ast_module = py.import("ast").unwrap(); | |
| 450 let module_type = ast_module.get(py, "Module").unwrap(); | |
| 451 | |
| 452 assert!(isinstance.call(py, (module, module_type), None).unwrap().is_true(py).unwrap()); | |
| 453 | |
| 454 let body = module.getattr(py, "body").unwrap(); | |
| 455 let mut statements = vec!(); | |
| 456 for statement in body.iter(py).unwrap() { | |
| 457 let statement = parse_statement(py, statement.unwrap()); | |
| 458 statements.push(statement) | |
| 459 } | |
| 460 Module{name: name, statements: statements} | |
| 461 } |