Mercurial > python-compiler.rs
annotate src/ast_convert.rs @ 7:680d15073f55
Add ast.List literal.
| author | Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> |
|---|---|
| date | Tue, 31 May 2016 04:26:58 +0100 |
| parents | 6f2bf13f4cb5 |
| children | 94ff501bf336 |
| 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(); | |
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122 let list_type = ast_module.get(py, "List").unwrap(); |
| 0 | 123 let compare_type = ast_module.get(py, "Compare").unwrap(); |
| 124 let call_type = ast_module.get(py, "Call").unwrap(); | |
| 125 let alias_type = ast_module.get(py, "alias").unwrap(); | |
| 126 | |
| 127 assert!(is_instance(&ast, &ast_type)); | |
| 128 | |
| 129 if is_instance(&ast, &arg_type) { | |
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130 let arg = ast.getattr(py, "arg").unwrap(); |
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131 let arg = get_str(py, arg); |
| 0 | 132 Expr::Name(arg) |
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133 } else if is_instance(&ast, &attribute_type) { |
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134 let value = ast.getattr(py, "value").unwrap(); |
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135 let attr = ast.getattr(py, "attr").unwrap(); |
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136 |
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137 let value = parse_expr(py, value); |
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138 let attr = get_str(py, attr); |
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139 |
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140 Expr::Attribute(Box::new(value), attr) |
| 0 | 141 } else if is_instance(&ast, &name_type) { |
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142 let id = ast.getattr(py, "id").unwrap(); |
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143 let id = get_str(py, id); |
| 0 | 144 Expr::Name(id) |
| 145 } else if is_instance(&ast, &name_constant_type) { | |
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146 let value = ast.getattr(py, "value").unwrap(); |
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147 let value = get_str(py, value); |
| 0 | 148 Expr::NameConstant(value) |
| 149 } else if is_instance(&ast, &num_type) { | |
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150 let n = ast.getattr(py, "n").unwrap(); |
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151 let n = get_str(py, n); |
| 0 | 152 Expr::Num(n) |
| 153 } else if is_instance(&ast, &str_type) { | |
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154 let s = ast.getattr(py, "s").unwrap(); |
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155 let s = get_str(py, s); |
| 0 | 156 Expr::Str(s) |
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157 } else if is_instance(&ast, &list_type) { |
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158 let elts = ast.getattr(py, "elts").unwrap(); |
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159 |
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160 let mut elements = vec!(); |
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161 for elt in elts.iter(py).unwrap() { |
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162 let elt = elt.unwrap(); |
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163 elements.push(parse_expr(py, elt)); |
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164 } |
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165 |
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166 Expr::List(elements) |
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167 } else if is_instance(&ast, &unary_op_type) { |
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168 let op = ast.getattr(py, "op").unwrap(); |
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169 let operand = ast.getattr(py, "operand").unwrap(); |
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170 |
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171 let op = parse_unaryop(py, op); |
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172 let operand = parse_expr(py, operand); |
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173 |
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174 Expr::UnaryOp(op, Box::new(operand)) |
| 0 | 175 } else if is_instance(&ast, &bin_op_type) { |
| 176 let left = ast.getattr(py, "left").unwrap(); | |
| 177 let op = ast.getattr(py, "op").unwrap(); | |
| 178 let right = ast.getattr(py, "right").unwrap(); | |
| 179 | |
| 180 let left = parse_expr(py, left); | |
| 181 let op = parse_binop(py, op); | |
| 182 let right = parse_expr(py, right); | |
| 183 | |
| 184 Expr::BinOp(Box::new(left), op, Box::new(right)) | |
| 185 } else if is_instance(&ast, &call_type) { | |
| 186 let func = ast.getattr(py, "func").unwrap(); | |
| 187 let args = ast.getattr(py, "args").unwrap(); | |
| 188 //let keywords = ast.getattr(py, "keywords").unwrap(); | |
| 189 | |
| 190 let func = parse_expr(py, func); | |
| 191 | |
| 192 let mut arguments = vec!(); | |
| 193 for arg in args.iter(py).unwrap() { | |
| 194 let arg = arg.unwrap(); | |
| 195 arguments.push(parse_expr(py, arg)); | |
| 196 } | |
| 197 | |
| 198 Expr::Call(Box::new(func), arguments) | |
| 199 } else if is_instance(&ast, &alias_type) { | |
| 200 let name = ast.getattr(py, "name").unwrap(); | |
| 201 let asname = ast.getattr(py, "asname").unwrap(); | |
| 202 | |
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203 let name = get_str(py, name); |
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204 let asname = if asname == py.None() { |
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205 None |
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206 } else { |
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207 Some(get_str(py, asname)) |
| 0 | 208 }; |
| 209 | |
| 210 Expr::Alias(name, asname) | |
| 211 } else if is_instance(&ast, &compare_type) { | |
| 212 let left = ast.getattr(py, "left").unwrap(); | |
| 213 let ops = ast.getattr(py, "ops").unwrap(); | |
| 214 let comparators = ast.getattr(py, "comparators").unwrap(); | |
| 215 | |
| 216 let left = parse_expr(py, left); | |
| 217 let ops = ops.iter(py).unwrap(); | |
| 218 let comparators = comparators.iter(py).unwrap(); | |
| 219 | |
| 220 let mut new_ops = vec!(); | |
| 221 for op in ops { | |
| 222 let op = op.unwrap(); | |
| 223 let op = parse_binop(py, op); | |
| 224 new_ops.push(op); | |
| 225 } | |
| 226 | |
| 227 let mut new_comparators = vec!(); | |
| 228 for comparator in comparators { | |
| 229 let comparator = comparator.unwrap(); | |
| 230 let comparator = parse_expr(py, comparator); | |
| 231 new_comparators.push(comparator); | |
| 232 } | |
| 233 | |
| 234 Expr::Compare(Box::new(left), new_ops, new_comparators) | |
| 235 } else { | |
| 236 println!("Expr {}", ast); | |
| 237 Expr::Error | |
| 238 } | |
| 239 } | |
| 240 | |
| 241 fn parse_statement(py: Python, ast: PyObject) -> Statement { | |
| 242 //Statement::FunctionDef(Expr::Name("function".to_string()), vec!(Expr::Name("a".to_string()), Expr::Name("b".to_string())), vec!()) | |
| 243 //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)))))) | |
| 244 | |
| 245 let builtins_module = py.import("builtins").unwrap(); | |
| 246 let isinstance = builtins_module.get(py, "isinstance").unwrap(); | |
| 247 | |
| 248 let is_instance = |object: &PyObject, type_: &PyObject| { | |
| 249 return isinstance.call(py, (object, type_), None).unwrap().is_true(py).unwrap(); | |
| 250 }; | |
| 251 | |
| 252 let ast_module = py.import("ast").unwrap(); | |
| 253 let ast_type = ast_module.get(py, "AST").unwrap(); | |
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254 let class_def_type = ast_module.get(py, "ClassDef").unwrap(); |
| 0 | 255 let function_def_type = ast_module.get(py, "FunctionDef").unwrap(); |
| 256 let global_type = ast_module.get(py, "Global").unwrap(); | |
| 257 let assign_type = ast_module.get(py, "Assign").unwrap(); | |
| 258 let return_type = ast_module.get(py, "Return").unwrap(); | |
| 259 let import_from_type = ast_module.get(py, "ImportFrom").unwrap(); | |
| 260 let if_type = ast_module.get(py, "If").unwrap(); | |
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261 let while_type = ast_module.get(py, "While").unwrap(); |
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262 let for_type = ast_module.get(py, "For").unwrap(); |
| 0 | 263 let expr_type = ast_module.get(py, "Expr").unwrap(); |
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264 let break_type = ast_module.get(py, "Break").unwrap(); |
| 0 | 265 |
| 266 assert!(is_instance(&ast, &ast_type)); | |
| 267 | |
| 268 /* | |
| 269 // TODO: implement Hash for PyObject. (trivial) | |
| 270 let map = { | |
| 271 let fields = ast.getattr(py, "_fields").unwrap(); | |
| 272 let mut map = HashMap::new(); | |
| 273 for field in fields.iter(py).unwrap() { | |
| 274 let field = field.unwrap(); | |
| 275 let value = ast.getattr(py, field).unwrap(); | |
| 276 map.insert(field, value); | |
| 277 } | |
| 278 map | |
| 279 }; | |
| 280 */ | |
| 281 | |
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282 if is_instance(&ast, &class_def_type) { |
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283 let name = ast.getattr(py, "name").unwrap(); |
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284 let bases = ast.getattr(py, "bases").unwrap(); |
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285 //let keywords = ast.getattr(py, "keywords").unwrap(); |
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286 let body = ast.getattr(py, "body").unwrap(); |
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287 //let decorator_list = ast.getattr(py, "decorator_list").unwrap(); |
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288 |
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289 let name = get_str(py, name); |
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290 |
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291 let mut nodes = vec!(); |
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292 for name_node in bases.iter(py).unwrap() { |
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293 let name_node = name_node.unwrap(); |
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294 let name_node = parse_expr(py, name_node); |
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295 nodes.push(name_node); |
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296 } |
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297 |
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298 let mut statements = vec!(); |
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299 for statement in body.iter(py).unwrap() { |
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300 let statement = statement.unwrap(); |
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301 let statement = parse_statement(py, statement); |
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302 statements.push(statement); |
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303 } |
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304 |
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305 Statement::ClassDef(name, nodes, statements) |
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306 } else if is_instance(&ast, &function_def_type) { |
| 0 | 307 let name = ast.getattr(py, "name").unwrap(); |
| 308 let args = ast.getattr(py, "args").unwrap(); | |
| 309 let body = ast.getattr(py, "body").unwrap(); | |
| 310 | |
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311 let name = get_str(py, name); |
| 0 | 312 let args = parse_expr_vec(py, args); |
| 313 /* | |
| 314 let mut arguments = vec!(); | |
| 315 for arg in args.iter(py).unwrap() { | |
| 316 let arg = parse_expr(py, arg.unwrap()); | |
| 317 arguments.push(arg); | |
| 318 } | |
| 319 */ | |
| 320 | |
| 321 let mut statements = vec!(); | |
| 322 for statement in body.iter(py).unwrap() { | |
| 323 let statement = parse_statement(py, statement.unwrap()); | |
| 324 statements.push(statement); | |
| 325 } | |
| 326 | |
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327 Statement::FunctionDef(name, args, statements) |
| 0 | 328 } else if is_instance(&ast, &global_type) { |
| 329 let names = ast.getattr(py, "names").unwrap(); | |
| 330 | |
| 331 let mut globals = vec!(); | |
| 332 for name in names.iter(py).unwrap() { | |
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333 let name = name.unwrap(); |
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334 let name = get_str(py, name); |
| 0 | 335 globals.push(name); |
| 336 } | |
| 337 | |
| 338 Statement::Global(globals) | |
| 339 } else if is_instance(&ast, &if_type) { | |
| 340 let test = ast.getattr(py, "test").unwrap(); | |
| 341 let body = ast.getattr(py, "body").unwrap(); | |
| 342 let orelse = ast.getattr(py, "orelse").unwrap(); | |
| 343 | |
| 344 let test = parse_expr(py, test); | |
| 345 | |
| 346 let mut statements = vec!(); | |
| 347 for statement in body.iter(py).unwrap() { | |
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348 let statement = statement.unwrap(); |
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349 let statement = parse_statement(py, statement); |
| 0 | 350 statements.push(statement); |
| 351 } | |
| 352 | |
| 353 let mut orelse_ = vec!(); | |
| 354 for statement in orelse.iter(py).unwrap() { | |
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355 let statement = statement.unwrap(); |
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356 let statement = parse_statement(py, statement); |
| 0 | 357 orelse_.push(statement); |
| 358 } | |
| 359 | |
| 360 Statement::If(test, statements, orelse_) | |
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361 } else if is_instance(&ast, &while_type) { |
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362 let test = ast.getattr(py, "test").unwrap(); |
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363 let body = ast.getattr(py, "body").unwrap(); |
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364 let orelse = ast.getattr(py, "orelse").unwrap(); |
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365 |
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366 let test = parse_expr(py, test); |
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367 |
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368 let mut statements = vec!(); |
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369 for statement in body.iter(py).unwrap() { |
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370 let statement = statement.unwrap(); |
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371 let statement = parse_statement(py, statement); |
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372 statements.push(statement); |
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373 } |
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374 |
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375 let mut orelse_ = vec!(); |
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376 for statement in orelse.iter(py).unwrap() { |
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377 let statement = statement.unwrap(); |
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378 let statement = parse_statement(py, statement); |
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379 orelse_.push(statement); |
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380 } |
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381 |
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382 Statement::While(test, statements, orelse_) |
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383 } else if is_instance(&ast, &for_type) { |
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384 let target = ast.getattr(py, "target").unwrap(); |
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385 let iter = ast.getattr(py, "iter").unwrap(); |
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386 let body = ast.getattr(py, "body").unwrap(); |
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387 let orelse = ast.getattr(py, "orelse").unwrap(); |
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388 |
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389 let target = parse_expr(py, target); |
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390 let iter = parse_expr(py, iter); |
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391 |
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392 let mut statements = vec!(); |
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393 for statement in body.iter(py).unwrap() { |
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394 let statement = statement.unwrap(); |
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395 let statement = parse_statement(py, statement); |
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396 statements.push(statement); |
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397 } |
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398 |
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399 let mut orelse_ = vec!(); |
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400 for statement in orelse.iter(py).unwrap() { |
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401 let statement = statement.unwrap(); |
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402 let statement = parse_statement(py, statement); |
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403 orelse_.push(statement); |
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404 } |
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405 |
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406 Statement::For(target, iter, statements, orelse_) |
| 0 | 407 } else if is_instance(&ast, &assign_type) { |
| 408 let targets = ast.getattr(py, "targets").unwrap(); | |
| 409 let value = ast.getattr(py, "value").unwrap(); | |
| 410 | |
| 411 let mut arguments = vec!(); | |
| 412 for target in targets.iter(py).unwrap() { | |
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413 let target = target.unwrap(); |
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414 let target = parse_expr(py, target); |
| 0 | 415 arguments.push(target); |
| 416 } | |
| 417 | |
| 418 let value = parse_expr(py, value); | |
| 419 | |
| 420 Statement::Assign(arguments, value) | |
| 421 } else if is_instance(&ast, &import_from_type) { | |
| 422 let module = ast.getattr(py, "module").unwrap(); | |
| 423 let names = ast.getattr(py, "names").unwrap(); | |
| 424 //let level = ast.getattr(py, "level").unwrap(); | |
| 425 | |
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426 let module = get_str(py, module); |
| 0 | 427 |
| 428 let mut names_ = vec!(); | |
| 429 for alias in names.iter(py).unwrap() { | |
| 430 let alias = alias.unwrap(); | |
| 431 let alias = parse_expr(py, alias); | |
| 432 names_.push(alias); | |
| 433 } | |
| 434 | |
| 435 Statement::ImportFrom(module, names_) | |
| 436 } else if is_instance(&ast, &return_type) { | |
| 437 let value = ast.getattr(py, "value").unwrap(); | |
| 438 let value = parse_expr(py, value); | |
| 439 Statement::Return(value) | |
| 440 } else if is_instance(&ast, &expr_type) { | |
| 441 let value = ast.getattr(py, "value").unwrap(); | |
| 442 let value = parse_expr(py, value); | |
| 443 Statement::Expr(value) | |
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444 } else if is_instance(&ast, &break_type) { |
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445 Statement::Break |
| 0 | 446 } else { |
| 447 println!("Statement {}", ast); | |
| 448 Statement::Error | |
| 449 } | |
| 450 } | |
| 451 | |
| 452 #[allow(dead_code)] | |
| 453 pub fn convert_ast(name: String, module: &PyObject) -> Module { | |
| 454 let gil = Python::acquire_gil(); | |
| 455 let py = gil.python(); | |
| 456 | |
| 457 let builtins_module = py.import("builtins").unwrap(); | |
| 458 let isinstance = builtins_module.get(py, "isinstance").unwrap(); | |
| 459 | |
| 460 let ast_module = py.import("ast").unwrap(); | |
| 461 let module_type = ast_module.get(py, "Module").unwrap(); | |
| 462 | |
| 463 assert!(isinstance.call(py, (module, module_type), None).unwrap().is_true(py).unwrap()); | |
| 464 | |
| 465 let body = module.getattr(py, "body").unwrap(); | |
| 466 let mut statements = vec!(); | |
| 467 for statement in body.iter(py).unwrap() { | |
| 468 let statement = parse_statement(py, statement.unwrap()); | |
| 469 statements.push(statement) | |
| 470 } | |
| 471 Module{name: name, statements: statements} | |
| 472 } |