Mercurial > python-compiler.rs
annotate src/ast_convert.rs @ 74:97537c90d92d
Add ast.Yield.
| author | Bastien Orivel <eijebong@bananium.fr> |
|---|---|
| date | Mon, 13 Jun 2016 18:25:02 +0200 |
| parents | 2a6629ea82b5 |
| children | 1abc8ca9f30b |
| rev | line source |
|---|---|
| 68 | 1 use python_ast::{Module, stmt, expr, expr_context, cmpop, boolop, operator, unaryop, arguments, arg, alias, comprehension, keyword, withitem, excepthandler}; |
| 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 |
| 18 | 12 fn get_ctx(py: Python, object: PyObject) -> expr_context { |
| 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 store_type = ast_module.get(py, "Store").unwrap(); | |
| 22 let load_type = ast_module.get(py, "Load").unwrap(); | |
| 21 | 23 let del_type = ast_module.get(py, "Del").unwrap(); |
| 18 | 24 |
| 25 let ctx = object.getattr(py, "ctx").unwrap(); | |
| 26 if is_instance(&ctx, &store_type) { | |
| 27 expr_context::Store | |
| 28 } else if is_instance(&ctx, &load_type) { | |
| 29 expr_context::Load | |
| 21 | 30 } else if is_instance(&ctx, &del_type) { |
| 31 expr_context::Del | |
| 18 | 32 } else{ |
| 33 unreachable!(); | |
| 34 } | |
| 35 } | |
| 36 | |
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37 fn parse_list<T, F: Fn(Python, PyObject) -> T>(py: Python, list: PyObject, parse: F) -> Vec<T> { |
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38 let mut exprs = vec!(); |
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39 for item in list.iter(py).unwrap() { |
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40 let item = item.unwrap(); |
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41 let item = parse(py, item); |
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42 exprs.push(item); |
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43 } |
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44 exprs |
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45 } |
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46 |
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44
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47 fn parse_alias(py: Python, ast: PyObject) -> alias { |
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48 let ast_alias = get_str(py, ast.getattr(py, "name").unwrap()); |
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49 let asname = ast.getattr(py, "asname").unwrap(); |
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50 if asname == py.None() { |
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51 alias{name: ast_alias, asname: None} |
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52 } else { |
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53 alias{name: ast_alias, asname: Some(get_str(py, asname))} |
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54 } |
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55 } |
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56 |
| 59 | 57 fn parse_withitem(py: Python, ast: PyObject) -> withitem { |
| 58 let context_expr = ast.getattr(py, "context_expr").unwrap(); | |
| 59 let optional_vars = ast.getattr(py, "optional_vars").unwrap(); | |
| 60 | |
| 61 let context_expr = parse_expr(py, context_expr); | |
| 62 | |
| 63 if optional_vars == py.None() { | |
| 64 withitem{context_expr: context_expr, optional_vars: None} | |
| 65 } else { | |
| 66 let optional_vars = parse_expr(py, optional_vars); | |
| 67 withitem{context_expr: context_expr, optional_vars: Some(optional_vars)} | |
| 68 } | |
| 69 } | |
| 70 | |
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71 fn parse_unaryop(py: Python, ast: PyObject) -> unaryop { |
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72 let builtins_module = py.import("builtins").unwrap(); |
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73 let isinstance = builtins_module.get(py, "isinstance").unwrap(); |
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74 |
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75 let is_instance = |object: &PyObject, type_: &PyObject| { |
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76 return isinstance.call(py, (object, type_), None).unwrap().is_true(py).unwrap(); |
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77 }; |
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78 |
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79 let ast_module = py.import("ast").unwrap(); |
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80 let ast_type = ast_module.get(py, "AST").unwrap(); |
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81 let invert_type = ast_module.get(py, "Invert").unwrap(); |
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82 let not_type = ast_module.get(py, "Not").unwrap(); |
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83 let uadd_type = ast_module.get(py, "UAdd").unwrap(); |
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84 let usub_type = ast_module.get(py, "USub").unwrap(); |
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85 |
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86 assert!(is_instance(&ast, &ast_type)); |
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87 |
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88 if is_instance(&ast, &invert_type) { |
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89 unaryop::Invert |
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90 } else if is_instance(&ast, ¬_type) { |
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91 unaryop::Not |
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92 } else if is_instance(&ast, &uadd_type) { |
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93 unaryop::UAdd |
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94 } else if is_instance(&ast, &usub_type) { |
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95 unaryop::USub |
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96 } else { |
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97 unreachable!() |
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98 } |
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99 } |
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100 |
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101 fn parse_boolop(py: Python, ast: PyObject) -> boolop { |
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102 let builtins_module = py.import("builtins").unwrap(); |
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103 let isinstance = builtins_module.get(py, "isinstance").unwrap(); |
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104 |
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105 let is_instance = |object: &PyObject, type_: &PyObject| { |
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106 return isinstance.call(py, (object, type_), None).unwrap().is_true(py).unwrap(); |
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107 }; |
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108 |
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109 let ast_module = py.import("ast").unwrap(); |
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110 let ast_type = ast_module.get(py, "AST").unwrap(); |
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111 let and_type = ast_module.get(py, "And").unwrap(); |
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112 let or_type = ast_module.get(py, "Or").unwrap(); |
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113 |
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114 assert!(is_instance(&ast, &ast_type)); |
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115 |
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116 if is_instance(&ast, &and_type) { |
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117 boolop::And |
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118 } else if is_instance(&ast, &or_type) { |
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119 boolop::Or |
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120 } else { |
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121 unreachable!() |
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122 } |
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123 } |
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124 |
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125 fn parse_cmpop(py: Python, ast: PyObject) -> cmpop { |
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126 let builtins_module = py.import("builtins").unwrap(); |
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127 let isinstance = builtins_module.get(py, "isinstance").unwrap(); |
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128 |
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129 let is_instance = |object: &PyObject, type_: &PyObject| { |
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130 return isinstance.call(py, (object, type_), None).unwrap().is_true(py).unwrap(); |
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131 }; |
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132 |
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133 let ast_module = py.import("ast").unwrap(); |
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134 let ast_type = ast_module.get(py, "AST").unwrap(); |
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135 let eq_type = ast_module.get(py, "Eq").unwrap(); |
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136 let noteq_type = ast_module.get(py, "NotEq").unwrap(); |
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137 let lt_type = ast_module.get(py, "Lt").unwrap(); |
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138 let lte_type = ast_module.get(py, "LtE").unwrap(); |
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139 let gt_type = ast_module.get(py, "Gt").unwrap(); |
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140 let gte_type = ast_module.get(py, "GtE").unwrap(); |
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141 let is_type = ast_module.get(py, "Is").unwrap(); |
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142 let is_not_type = ast_module.get(py, "IsNot").unwrap(); |
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143 let in_type = ast_module.get(py, "In").unwrap(); |
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144 let not_in_type = ast_module.get(py, "NotIn").unwrap(); |
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145 |
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146 assert!(is_instance(&ast, &ast_type)); |
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147 |
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148 if is_instance(&ast, &eq_type) { |
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149 cmpop::Eq |
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150 } else if is_instance(&ast, ¬eq_type) { |
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151 cmpop::NotEq |
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152 } else if is_instance(&ast, <_type) { |
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153 cmpop::Lt |
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154 } else if is_instance(&ast, <e_type) { |
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155 cmpop::LtE |
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156 } else if is_instance(&ast, >_type) { |
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157 cmpop::Gt |
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158 } else if is_instance(&ast, >e_type) { |
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159 cmpop::GtE |
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160 } else if is_instance(&ast, &is_type) { |
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161 cmpop::Is |
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162 } else if is_instance(&ast, &is_not_type) { |
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163 cmpop::IsNot |
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164 } else if is_instance(&ast, &in_type) { |
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165 cmpop::In |
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166 } else if is_instance(&ast, ¬_in_type) { |
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167 cmpop::NotIn |
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168 } else { |
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169 unreachable!() |
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170 } |
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171 } |
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172 |
| 14 | 173 fn parse_comprehension(py: Python, ast: PyObject) -> comprehension { |
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174 let target = ast.getattr(py, "target").unwrap(); |
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175 let iter = ast.getattr(py, "iter").unwrap(); |
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176 let ifs = ast.getattr(py, "ifs").unwrap(); |
| 14 | 177 |
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178 let target = parse_expr(py, target); |
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179 let iter = parse_expr(py, iter); |
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180 let ifs = parse_list(py, ifs, parse_expr); |
| 14 | 181 |
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182 comprehension {target: target, iter: iter, ifs: ifs} |
| 14 | 183 } |
| 184 | |
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185 fn parse_keyword(py: Python, ast: PyObject) -> keyword { |
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186 let arg = ast.getattr(py, "arg").unwrap(); |
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187 let value = ast.getattr(py, "value").unwrap(); |
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188 |
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189 let arg = if arg == py.None() { |
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190 None |
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191 } else { |
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192 let arg = get_str(py, arg); |
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193 Some(arg) |
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194 }; |
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195 let value = parse_expr(py, value); |
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196 |
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197 keyword {arg: arg, value: value} |
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198 } |
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199 |
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200 fn parse_operator(py: Python, ast: PyObject) -> operator { |
| 0 | 201 let builtins_module = py.import("builtins").unwrap(); |
| 202 let isinstance = builtins_module.get(py, "isinstance").unwrap(); | |
| 203 | |
| 204 let is_instance = |object: &PyObject, type_: &PyObject| { | |
| 205 return isinstance.call(py, (object, type_), None).unwrap().is_true(py).unwrap(); | |
| 206 }; | |
| 207 | |
| 208 let ast_module = py.import("ast").unwrap(); | |
| 209 let ast_type = ast_module.get(py, "AST").unwrap(); | |
| 210 let add_type = ast_module.get(py, "Add").unwrap(); | |
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211 let sub_type = ast_module.get(py, "Sub").unwrap(); |
| 0 | 212 let mult_type = ast_module.get(py, "Mult").unwrap(); |
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213 let matmult_type = ast_module.get(py, "MatMult").unwrap(); |
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214 let div_type = ast_module.get(py, "Div").unwrap(); |
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215 let mod_type = ast_module.get(py, "Mod").unwrap(); |
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216 let pow_type = ast_module.get(py, "Pow").unwrap(); |
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217 let lshift_type = ast_module.get(py, "LShift").unwrap(); |
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218 let rshift_type = ast_module.get(py, "RShift").unwrap(); |
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219 let bitor_type = ast_module.get(py, "BitOr").unwrap(); |
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220 let bitxor_type = ast_module.get(py, "BitXor").unwrap(); |
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221 let bitand_type = ast_module.get(py, "BitAnd").unwrap(); |
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222 let floordiv_type = ast_module.get(py, "FloorDiv").unwrap(); |
| 0 | 223 |
| 224 assert!(is_instance(&ast, &ast_type)); | |
| 225 | |
| 226 if is_instance(&ast, &add_type) { | |
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227 operator::Add |
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228 } else if is_instance(&ast, &sub_type) { |
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229 operator::Sub |
| 0 | 230 } else if is_instance(&ast, &mult_type) { |
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231 operator::Mult |
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232 } else if is_instance(&ast, &matmult_type) { |
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233 operator::MatMult |
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234 } else if is_instance(&ast, &div_type) { |
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235 operator::Div |
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236 } else if is_instance(&ast, &mod_type) { |
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237 operator::Mod |
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238 } else if is_instance(&ast, &pow_type) { |
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239 operator::Pow |
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240 } else if is_instance(&ast, &lshift_type) { |
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241 operator::LShift |
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242 } else if is_instance(&ast, &rshift_type) { |
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243 operator::RShift |
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244 } else if is_instance(&ast, &bitor_type) { |
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245 operator::BitOr |
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246 } else if is_instance(&ast, &bitxor_type) { |
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247 operator::BitXor |
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248 } else if is_instance(&ast, &bitand_type) { |
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249 operator::BitAnd |
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250 } else if is_instance(&ast, &floordiv_type) { |
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251 operator::FloorDiv |
| 0 | 252 } else { |
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253 println!("operator {}", ast); |
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254 panic!() |
| 0 | 255 } |
| 256 } | |
| 257 | |
| 68 | 258 fn parse_excepthandler(py: Python, ast: PyObject) -> excepthandler { |
| 259 let type_ = ast.getattr(py, "type").unwrap(); | |
| 260 let name = ast.getattr(py, "name").unwrap(); | |
| 261 let body = ast.getattr(py, "body").unwrap(); | |
| 262 | |
| 263 let type_ = parse_optional_expr(py, type_); | |
| 264 let name = if name == py.None() { None } else { Some(get_str(py, name)) }; | |
| 265 let body = parse_list(py, body, parse_statement); | |
| 266 | |
| 267 excepthandler{type_: type_, name: name, body: body} | |
| 268 } | |
| 269 | |
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61
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270 fn parse_optional_expr(py: Python, ast: PyObject) -> Option<expr> { |
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271 if ast == py.None() { |
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272 None |
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273 } else { |
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274 let ast = parse_expr(py, ast); |
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275 Some(ast) |
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276 } |
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277 } |
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278 |
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279 fn parse_expr(py: Python, ast: PyObject) -> expr { |
| 0 | 280 let builtins_module = py.import("builtins").unwrap(); |
| 281 let isinstance = builtins_module.get(py, "isinstance").unwrap(); | |
| 282 | |
| 283 let is_instance = |object: &PyObject, type_: &PyObject| { | |
| 284 return isinstance.call(py, (object, type_), None).unwrap().is_true(py).unwrap(); | |
| 285 }; | |
| 286 | |
| 287 let ast_module = py.import("ast").unwrap(); | |
| 288 let ast_type = ast_module.get(py, "AST").unwrap(); | |
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289 let unary_op_type = ast_module.get(py, "UnaryOp").unwrap(); |
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290 let bool_op_type = ast_module.get(py, "BoolOp").unwrap(); |
| 0 | 291 let bin_op_type = ast_module.get(py, "BinOp").unwrap(); |
| 292 let name_constant_type = ast_module.get(py, "NameConstant").unwrap(); | |
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293 let attribute_type = ast_module.get(py, "Attribute").unwrap(); |
| 0 | 294 let name_type = ast_module.get(py, "Name").unwrap(); |
| 295 let num_type = ast_module.get(py, "Num").unwrap(); | |
| 296 let str_type = ast_module.get(py, "Str").unwrap(); | |
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297 let list_type = ast_module.get(py, "List").unwrap(); |
| 0 | 298 let compare_type = ast_module.get(py, "Compare").unwrap(); |
| 299 let call_type = ast_module.get(py, "Call").unwrap(); | |
| 14 | 300 let listcomp_type = ast_module.get(py, "ListComp").unwrap(); |
| 16 | 301 let dictcomp_type = ast_module.get(py, "DictComp").unwrap(); |
| 17 | 302 let tuple_type = ast_module.get(py, "Tuple").unwrap(); |
| 52 | 303 let ellipsis_type = ast_module.get(py, "Ellipsis").unwrap(); |
| 73 | 304 let await_type = ast_module.get(py, "Await").unwrap(); |
| 74 | 305 let yield_type = ast_module.get(py, "Yield").unwrap(); |
| 0 | 306 |
| 307 assert!(is_instance(&ast, &ast_type)); | |
| 308 | |
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309 if is_instance(&ast, &attribute_type) { |
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310 let value = ast.getattr(py, "value").unwrap(); |
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311 let attr = ast.getattr(py, "attr").unwrap(); |
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312 |
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313 let value = parse_expr(py, value); |
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314 let attr = get_str(py, attr); |
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315 |
| 18 | 316 expr::Attribute(Box::new(value), attr, get_ctx(py, ast)) |
| 0 | 317 } else if is_instance(&ast, &name_type) { |
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318 let id = ast.getattr(py, "id").unwrap(); |
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319 let id = get_str(py, id); |
| 18 | 320 expr::Name(id, get_ctx(py, ast)) |
| 0 | 321 } else if is_instance(&ast, &name_constant_type) { |
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322 let value = ast.getattr(py, "value").unwrap(); |
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323 let value = get_str(py, value); |
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324 expr::NameConstant(value) |
| 0 | 325 } else if is_instance(&ast, &num_type) { |
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326 let n = ast.getattr(py, "n").unwrap(); |
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327 let n = get_str(py, n); |
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328 expr::Num(n) |
| 0 | 329 } else if is_instance(&ast, &str_type) { |
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330 let s = ast.getattr(py, "s").unwrap(); |
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331 let s = get_str(py, s); |
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332 expr::Str(s) |
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333 } else if is_instance(&ast, &list_type) { |
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334 let elts = ast.getattr(py, "elts").unwrap(); |
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335 let elements = parse_list(py, elts, parse_expr); |
| 18 | 336 expr::List(elements, get_ctx(py, ast)) |
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337 } else if is_instance(&ast, &unary_op_type) { |
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338 let op = ast.getattr(py, "op").unwrap(); |
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339 let operand = ast.getattr(py, "operand").unwrap(); |
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340 |
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341 let op = parse_unaryop(py, op); |
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342 let operand = parse_expr(py, operand); |
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343 |
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344 expr::UnaryOp(op, Box::new(operand)) |
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345 } else if is_instance(&ast, &bool_op_type) { |
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346 let op = ast.getattr(py, "op").unwrap(); |
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347 let values = ast.getattr(py, "values").unwrap(); |
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348 |
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349 let op = parse_boolop(py, op); |
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350 let values = parse_list(py, values, parse_expr); |
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351 |
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352 expr::BoolOp(op, values) |
| 0 | 353 } else if is_instance(&ast, &bin_op_type) { |
| 354 let left = ast.getattr(py, "left").unwrap(); | |
| 355 let op = ast.getattr(py, "op").unwrap(); | |
| 356 let right = ast.getattr(py, "right").unwrap(); | |
| 357 | |
| 358 let left = parse_expr(py, left); | |
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359 let op = parse_operator(py, op); |
| 0 | 360 let right = parse_expr(py, right); |
| 361 | |
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362 expr::BinOp(Box::new(left), op, Box::new(right)) |
| 0 | 363 } else if is_instance(&ast, &call_type) { |
| 364 let func = ast.getattr(py, "func").unwrap(); | |
| 365 let args = ast.getattr(py, "args").unwrap(); | |
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366 let keywords = ast.getattr(py, "keywords").unwrap(); |
| 0 | 367 |
| 368 let func = parse_expr(py, func); | |
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369 let args = parse_list(py, args, parse_expr); |
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370 let keywords = parse_list(py, keywords, parse_keyword); |
| 0 | 371 |
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372 expr::Call(Box::new(func), args, keywords) |
| 0 | 373 } else if is_instance(&ast, &compare_type) { |
| 374 let left = ast.getattr(py, "left").unwrap(); | |
| 375 let ops = ast.getattr(py, "ops").unwrap(); | |
| 376 let comparators = ast.getattr(py, "comparators").unwrap(); | |
| 377 | |
| 378 let left = parse_expr(py, left); | |
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379 let ops = parse_list(py, ops, parse_cmpop); |
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380 let comparators = parse_list(py, comparators, parse_expr); |
| 0 | 381 |
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382 expr::Compare(Box::new(left), ops, comparators) |
| 14 | 383 } else if is_instance(&ast, &listcomp_type) { |
| 384 let elt = ast.getattr(py, "elt").unwrap(); | |
| 385 let generators = ast.getattr(py, "generators").unwrap(); | |
| 386 | |
| 387 let elt = parse_expr(py, elt); | |
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388 let generators = parse_list(py, generators, parse_comprehension); |
| 14 | 389 |
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390 expr::ListComp(Box::new(elt), generators) |
| 16 | 391 } else if is_instance(&ast, &dictcomp_type) { |
| 392 let key = ast.getattr(py, "key").unwrap(); | |
| 393 let value = ast.getattr(py, "value").unwrap(); | |
| 394 let generators = ast.getattr(py, "generators").unwrap(); | |
| 395 | |
| 396 let key = parse_expr(py, key); | |
| 397 let value = parse_expr(py, value); | |
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398 let generators = parse_list(py, generators, parse_comprehension); |
| 16 | 399 |
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400 expr::DictComp(Box::new(key), Box::new(value), generators) |
| 17 | 401 } else if is_instance(&ast, &tuple_type) { |
| 402 let elts = ast.getattr(py, "elts").unwrap(); | |
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403 let elts = parse_list(py, elts, parse_expr); |
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404 expr::Tuple(elts, get_ctx(py, ast)) |
| 52 | 405 } else if is_instance(&ast, &ellipsis_type) { |
| 406 expr::Ellipsis | |
| 73 | 407 } else if is_instance(&ast, &await_type) { |
| 408 let value = ast.getattr(py, "value").unwrap(); | |
| 409 let value = parse_expr(py, value); | |
| 410 | |
| 411 expr::Await(Box::new(value)) | |
| 74 | 412 } else if is_instance(&ast, &yield_type) { |
| 413 let value = ast.getattr(py, "value").unwrap(); | |
| 414 let value = parse_optional_expr(py, value); | |
| 415 | |
| 416 expr::Yield(Box::new(value)) | |
| 16 | 417 } else { |
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418 println!("expr {}", ast); |
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419 unreachable!() |
| 0 | 420 } |
| 421 } | |
| 422 | |
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423 fn parse_arg(py: Python, ast: PyObject) -> arg { |
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424 let arg = ast.getattr(py, "arg").unwrap(); |
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425 let annotation = ast.getattr(py, "annotation").unwrap(); |
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426 |
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427 let arg = get_str(py, arg); |
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428 let annotation = parse_optional_expr(py, annotation); |
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429 |
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430 arg{arg: arg, annotation: annotation} |
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431 } |
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432 |
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433 fn parse_arguments(py: Python, ast: PyObject) -> arguments { |
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434 let builtins_module = py.import("builtins").unwrap(); |
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435 let isinstance = builtins_module.get(py, "isinstance").unwrap(); |
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436 |
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437 let is_instance = |object: &PyObject, type_: &PyObject| { |
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438 return isinstance.call(py, (object, type_), None).unwrap().is_true(py).unwrap(); |
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439 }; |
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440 |
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441 let ast_module = py.import("ast").unwrap(); |
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442 let ast_type = ast_module.get(py, "AST").unwrap(); |
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443 let arguments_type = ast_module.get(py, "arguments").unwrap(); |
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444 let arg_type = ast_module.get(py, "arg").unwrap(); |
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445 |
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446 assert!(is_instance(&ast, &ast_type)); |
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447 |
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448 if is_instance(&ast, &arguments_type) { |
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449 let args = arguments{ |
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450 //args: Vec<arg>, |
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451 args: { |
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452 let args = ast.getattr(py, "args").unwrap(); |
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453 let mut arguments = vec!(); |
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454 for arg in args.iter(py).unwrap() { |
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455 let arg = arg.unwrap(); |
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456 assert!(is_instance(&arg, &arg_type)); |
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457 let arg = parse_arg(py, arg); |
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458 arguments.push(arg); |
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459 } |
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460 arguments |
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461 }, |
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462 //vararg: Option<arg>, |
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463 vararg: { |
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464 let vararg = ast.getattr(py, "vararg").unwrap(); |
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465 if vararg == py.None() { |
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466 None |
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467 } else { |
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468 let arg = parse_arg(py, vararg); |
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469 Some(arg) |
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470 } |
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471 }, |
|
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472 //kwonlyargs: Vec<arg>, |
|
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473 kwonlyargs: { |
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474 let kwonlyargs = ast.getattr(py, "kwonlyargs").unwrap(); |
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475 let mut arguments = vec!(); |
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476 for arg in kwonlyargs.iter(py).unwrap() { |
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477 let arg = arg.unwrap(); |
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478 assert!(is_instance(&arg, &arg_type)); |
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479 let arg = parse_arg(py, arg); |
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480 arguments.push(arg); |
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481 } |
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482 arguments |
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483 }, |
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484 //kw_defaults: Vec<Option<expr>>, |
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485 kw_defaults: { |
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486 let kw_defaults = ast.getattr(py, "kw_defaults").unwrap(); |
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487 let mut arguments = vec!(); |
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488 for arg in kw_defaults.iter(py).unwrap() { |
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489 let arg = arg.unwrap(); |
|
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490 let arg = parse_optional_expr(py, arg); |
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491 |
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492 arguments.push(arg); |
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493 } |
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494 arguments |
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495 }, |
|
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496 //kwarg: Option<arg>, |
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497 kwarg: { |
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498 let kwarg = ast.getattr(py, "kwarg").unwrap(); |
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499 if kwarg == py.None() { |
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500 None |
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501 } else { |
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502 let arg = parse_arg(py, kwarg); |
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503 Some(arg) |
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504 } |
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505 }, |
|
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506 //defaults: Vec<expr> |
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507 defaults: { |
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508 let defaults = ast.getattr(py, "defaults").unwrap(); |
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509 let mut arguments = vec!(); |
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510 for arg in defaults.iter(py).unwrap() { |
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511 let arg = arg.unwrap(); |
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512 let arg = parse_expr(py, arg); |
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513 arguments.push(arg); |
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514 } |
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515 arguments |
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516 } |
|
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517 }; |
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518 args |
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519 } else { |
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520 println!("arguments {}", ast); |
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521 panic!() |
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522 } |
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523 } |
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524 |
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525 fn parse_statement(py: Python, ast: PyObject) -> stmt { |
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526 //stmt::FunctionDef(expr::Name("function".to_string()), vec!(expr::Name("a".to_string()), expr::Name("b".to_string())), vec!()) |
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527 //stmt::If(expr::BinOp(BinOp::BinEq, Box::new(expr::Name("__name__".to_string())), Box::new(expr::Str("__main__".to_string()))), vec!(stmt::Expr(expr::Call(Box::new(expr::Name("function".to_string())), vec!(expr::Num(1), expr::Num(2)))))) |
| 0 | 528 |
| 529 let builtins_module = py.import("builtins").unwrap(); | |
| 530 let isinstance = builtins_module.get(py, "isinstance").unwrap(); | |
| 531 | |
| 532 let is_instance = |object: &PyObject, type_: &PyObject| { | |
| 533 return isinstance.call(py, (object, type_), None).unwrap().is_true(py).unwrap(); | |
| 534 }; | |
| 535 | |
| 536 let ast_module = py.import("ast").unwrap(); | |
| 537 let ast_type = ast_module.get(py, "AST").unwrap(); | |
|
2
5fc7c2790d8c
Add class support.
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538 let class_def_type = ast_module.get(py, "ClassDef").unwrap(); |
| 0 | 539 let function_def_type = ast_module.get(py, "FunctionDef").unwrap(); |
|
69
a73eaf42bea1
Add ast.AsyncDefFunction.
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540 let async_function_def_type = ast_module.get(py, "AsyncFunctionDef").unwrap(); |
| 0 | 541 let global_type = ast_module.get(py, "Global").unwrap(); |
| 51 | 542 let nonlocal_type = ast_module.get(py, "Nonlocal").unwrap(); |
| 0 | 543 let assign_type = ast_module.get(py, "Assign").unwrap(); |
|
8
94ff501bf336
Add ast.AugAssign.
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544 let aug_assign_type = ast_module.get(py, "AugAssign").unwrap(); |
| 0 | 545 let return_type = ast_module.get(py, "Return").unwrap(); |
| 546 let import_from_type = ast_module.get(py, "ImportFrom").unwrap(); | |
|
47
38f59b0efc2c
Handle Import and add a test for it.
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547 let import_type = ast_module.get(py, "Import").unwrap(); |
| 0 | 548 let if_type = ast_module.get(py, "If").unwrap(); |
|
6
6f2bf13f4cb5
Add ast.While and ast.Break.
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|
549 let while_type = ast_module.get(py, "While").unwrap(); |
|
5
ddf372373a77
Add ast.For, ast.UnaryOp, and Sub and Div to ast.BinOp.
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|
550 let for_type = ast_module.get(py, "For").unwrap(); |
| 71 | 551 let async_for_type = ast_module.get(py, "AsyncFor").unwrap(); |
| 0 | 552 let expr_type = ast_module.get(py, "Expr").unwrap(); |
|
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553 let break_type = ast_module.get(py, "Break").unwrap(); |
| 21 | 554 let delete_type = ast_module.get(py, "Delete").unwrap(); |
| 49 | 555 let pass_type = ast_module.get(py, "Pass").unwrap(); |
| 50 | 556 let continue_type = ast_module.get(py, "Continue").unwrap(); |
| 57 | 557 let assert_type = ast_module.get(py, "Assert").unwrap(); |
| 59 | 558 let with_type = ast_module.get(py, "With").unwrap(); |
| 72 | 559 let async_with_type = ast_module.get(py, "AsyncWith").unwrap(); |
| 60 | 560 let raise_type = ast_module.get(py, "Raise").unwrap(); |
| 68 | 561 let try_type = ast_module.get(py, "Try").unwrap(); |
| 0 | 562 |
| 563 assert!(is_instance(&ast, &ast_type)); | |
| 564 | |
| 565 /* | |
| 566 // TODO: implement Hash for PyObject. (trivial) | |
| 567 let map = { | |
| 568 let fields = ast.getattr(py, "_fields").unwrap(); | |
| 569 let mut map = HashMap::new(); | |
| 570 for field in fields.iter(py).unwrap() { | |
| 571 let field = field.unwrap(); | |
| 572 let value = ast.getattr(py, field).unwrap(); | |
| 573 map.insert(field, value); | |
| 574 } | |
| 575 map | |
| 576 }; | |
| 577 */ | |
| 578 | |
|
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|
579 if is_instance(&ast, &class_def_type) { |
|
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|
580 let name = ast.getattr(py, "name").unwrap(); |
|
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|
581 let bases = ast.getattr(py, "bases").unwrap(); |
|
67
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|
582 let keywords = ast.getattr(py, "keywords").unwrap(); |
|
2
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|
583 let body = ast.getattr(py, "body").unwrap(); |
|
65
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|
584 let decorator_list = ast.getattr(py, "decorator_list").unwrap(); |
|
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|
585 |
|
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|
586 let name = get_str(py, name); |
|
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587 let bases = parse_list(py, bases, parse_expr); |
|
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|
588 let keywords = parse_list(py, keywords, parse_keyword); |
|
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|
589 let body = parse_list(py, body, parse_statement); |
|
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parents:
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|
590 let decorator_list = parse_list(py, decorator_list, parse_expr); |
|
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|
591 |
|
67
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|
592 stmt::ClassDef(name, bases, keywords, body, decorator_list) |
|
69
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|
593 } else if is_instance(&ast, &function_def_type) || is_instance(&ast, &async_function_def_type) { |
| 0 | 594 let name = ast.getattr(py, "name").unwrap(); |
| 595 let args = ast.getattr(py, "args").unwrap(); | |
| 596 let body = ast.getattr(py, "body").unwrap(); | |
|
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53817b39f139
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597 let decorator_list = ast.getattr(py, "decorator_list").unwrap(); |
|
63
5df52b40fe54
Implement FunctionDef.returns.
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|
598 let returns = ast.getattr(py, "returns").unwrap(); |
| 0 | 599 |
|
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|
600 let name = get_str(py, name); |
|
13
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|
601 let args = parse_arguments(py, args); |
|
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|
602 let body = parse_list(py, body, parse_statement); |
|
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53817b39f139
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|
603 let decorator_list = parse_list(py, decorator_list, parse_expr); |
|
63
5df52b40fe54
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|
604 let returns = parse_optional_expr(py, returns); |
|
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605 |
|
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|
606 stmt::FunctionDef(name, args, body, decorator_list, returns, is_instance(&ast, &async_function_def_type)) |
| 0 | 607 } else if is_instance(&ast, &global_type) { |
| 608 let names = ast.getattr(py, "names").unwrap(); | |
|
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609 let names = parse_list(py, names, get_str); |
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|
610 stmt::Global(names) |
| 51 | 611 } else if is_instance(&ast, &nonlocal_type) { |
| 612 let names = ast.getattr(py, "names").unwrap(); | |
| 613 let names = parse_list(py, names, get_str); | |
| 614 stmt::Nonlocal(names) | |
| 0 | 615 } else if is_instance(&ast, &if_type) { |
| 616 let test = ast.getattr(py, "test").unwrap(); | |
| 617 let body = ast.getattr(py, "body").unwrap(); | |
| 618 let orelse = ast.getattr(py, "orelse").unwrap(); | |
| 619 | |
| 620 let test = parse_expr(py, test); | |
|
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621 let body = parse_list(py, body, parse_statement); |
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622 let orelse = parse_list(py, orelse, parse_statement); |
| 0 | 623 |
|
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624 stmt::If(test, body, orelse) |
|
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625 } else if is_instance(&ast, &while_type) { |
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626 let test = ast.getattr(py, "test").unwrap(); |
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627 let body = ast.getattr(py, "body").unwrap(); |
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628 let orelse = ast.getattr(py, "orelse").unwrap(); |
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629 |
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630 let test = parse_expr(py, test); |
|
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631 let body = parse_list(py, body, parse_statement); |
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632 let orelse = parse_list(py, orelse, parse_statement); |
|
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|
633 |
|
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634 stmt::While(test, body, orelse) |
| 71 | 635 } else if is_instance(&ast, &for_type) || is_instance(&ast, &async_for_type) { |
|
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636 let target = ast.getattr(py, "target").unwrap(); |
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|
637 let iter = ast.getattr(py, "iter").unwrap(); |
|
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638 let body = ast.getattr(py, "body").unwrap(); |
|
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|
639 let orelse = ast.getattr(py, "orelse").unwrap(); |
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|
640 |
|
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|
641 let target = parse_expr(py, target); |
|
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|
642 let iter = parse_expr(py, iter); |
|
20
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19
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643 let body = parse_list(py, body, parse_statement); |
|
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|
644 let orelse = parse_list(py, orelse, parse_statement); |
|
5
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|
645 |
| 71 | 646 stmt::For(target, iter, body, orelse, is_instance(&ast, &async_for_type)) |
| 0 | 647 } else if is_instance(&ast, &assign_type) { |
| 648 let targets = ast.getattr(py, "targets").unwrap(); | |
| 649 let value = ast.getattr(py, "value").unwrap(); | |
| 650 | |
|
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parents:
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|
651 let targets = parse_list(py, targets, parse_expr); |
| 0 | 652 let value = parse_expr(py, value); |
| 653 | |
|
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|
654 stmt::Assign(targets, value) |
|
8
94ff501bf336
Add ast.AugAssign.
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|
655 } else if is_instance(&ast, &aug_assign_type) { |
|
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|
656 let target = ast.getattr(py, "target").unwrap(); |
|
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|
657 let op = ast.getattr(py, "op").unwrap(); |
|
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|
658 let value = ast.getattr(py, "value").unwrap(); |
|
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|
659 |
|
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|
660 let target = parse_expr(py, target); |
|
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|
661 let op = parse_operator(py, op); |
|
8
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|
662 let value = parse_expr(py, value); |
|
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|
663 |
|
13
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|
664 stmt::AugAssign(target, op, value) |
| 0 | 665 } else if is_instance(&ast, &import_from_type) { |
| 666 let module = ast.getattr(py, "module").unwrap(); | |
| 667 let names = ast.getattr(py, "names").unwrap(); | |
|
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|
668 let level = ast.getattr(py, "level").unwrap(); |
| 0 | 669 |
|
1
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Factorise conversion of Python str into Rust String.
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parents:
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diff
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|
670 let module = get_str(py, module); |
|
44
5f1d285471af
Finish ImportFrom conversion and add a test for it.
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21
diff
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|
671 let names = parse_list(py, names, parse_alias); |
| 0 | 672 |
|
48
039f85b187f2
Also handle relative imports.
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diff
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|
673 if level == py.None() { |
|
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|
674 stmt::ImportFrom(module, names, None) |
|
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|
675 } else { |
|
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|
676 let level = level.extract(py).unwrap(); |
|
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|
677 stmt::ImportFrom(module, names, Some(level)) |
|
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|
678 } |
|
47
38f59b0efc2c
Handle Import and add a test for it.
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|
679 } else if is_instance(&ast, &import_type) { |
|
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|
680 let names = ast.getattr(py, "names").unwrap(); |
|
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|
681 let names = parse_list(py, names, parse_alias); |
|
38f59b0efc2c
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changeset
|
682 |
|
38f59b0efc2c
Handle Import and add a test for it.
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changeset
|
683 stmt::Import(names) |
| 0 | 684 } else if is_instance(&ast, &return_type) { |
| 685 let value = ast.getattr(py, "value").unwrap(); | |
|
61
6b73843c5b4a
Add a parse_optional_expr function and use it instead of let var = if var == py.None() { None } else { Some(parse_expr(var) };
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60
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|
686 let value = parse_optional_expr(py, value); |
|
6b73843c5b4a
Add a parse_optional_expr function and use it instead of let var = if var == py.None() { None } else { Some(parse_expr(var) };
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|
687 |
|
6b73843c5b4a
Add a parse_optional_expr function and use it instead of let var = if var == py.None() { None } else { Some(parse_expr(var) };
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|
688 stmt::Return(value) |
| 0 | 689 } else if is_instance(&ast, &expr_type) { |
| 690 let value = ast.getattr(py, "value").unwrap(); | |
| 691 let value = parse_expr(py, value); | |
|
13
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changeset
|
692 stmt::Expr(value) |
|
6
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|
693 } else if is_instance(&ast, &break_type) { |
|
13
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|
694 stmt::Break |
| 21 | 695 } else if is_instance(&ast, &delete_type) { |
| 696 let targets = ast.getattr(py, "targets").unwrap(); | |
| 697 let targets = parse_list(py, targets, parse_expr); | |
| 698 stmt::Delete(targets) | |
| 49 | 699 } else if is_instance(&ast, &pass_type) { |
| 700 stmt::Pass | |
| 50 | 701 } else if is_instance(&ast, &continue_type) { |
| 702 stmt::Continue | |
| 57 | 703 } else if is_instance(&ast, &assert_type) { |
| 704 let test = ast.getattr(py, "test").unwrap(); | |
| 705 let msg = ast.getattr(py, "msg").unwrap(); | |
| 706 | |
|
61
6b73843c5b4a
Add a parse_optional_expr function and use it instead of let var = if var == py.None() { None } else { Some(parse_expr(var) };
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|
707 let test = parse_expr(py, test); |
|
6b73843c5b4a
Add a parse_optional_expr function and use it instead of let var = if var == py.None() { None } else { Some(parse_expr(var) };
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|
708 let msg = parse_optional_expr(py, msg); |
|
6b73843c5b4a
Add a parse_optional_expr function and use it instead of let var = if var == py.None() { None } else { Some(parse_expr(var) };
Bastien Orivel <eijebong@bananium.fr>
parents:
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diff
changeset
|
709 |
|
6b73843c5b4a
Add a parse_optional_expr function and use it instead of let var = if var == py.None() { None } else { Some(parse_expr(var) };
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|
710 stmt::Assert(test, msg) |
| 72 | 711 } else if is_instance(&ast, &with_type) || is_instance(&ast, &async_with_type) { |
| 59 | 712 let items = ast.getattr(py, "items").unwrap(); |
| 713 let body = ast.getattr(py, "body").unwrap(); | |
| 714 | |
| 715 let items = parse_list(py, items, parse_withitem); | |
| 716 let body = parse_list(py, body, parse_statement); | |
| 72 | 717 stmt::With(items, body, is_instance(&ast, &async_with_type)) |
| 60 | 718 } else if is_instance(&ast, &raise_type) { |
| 719 let exc = ast.getattr(py, "exc").unwrap(); | |
| 720 let cause = ast.getattr(py, "cause").unwrap(); | |
| 721 | |
|
61
6b73843c5b4a
Add a parse_optional_expr function and use it instead of let var = if var == py.None() { None } else { Some(parse_expr(var) };
Bastien Orivel <eijebong@bananium.fr>
parents:
60
diff
changeset
|
722 let exc = parse_optional_expr(py, exc); |
|
6b73843c5b4a
Add a parse_optional_expr function and use it instead of let var = if var == py.None() { None } else { Some(parse_expr(var) };
Bastien Orivel <eijebong@bananium.fr>
parents:
60
diff
changeset
|
723 let cause = parse_optional_expr(py, cause); |
| 60 | 724 |
|
61
6b73843c5b4a
Add a parse_optional_expr function and use it instead of let var = if var == py.None() { None } else { Some(parse_expr(var) };
Bastien Orivel <eijebong@bananium.fr>
parents:
60
diff
changeset
|
725 stmt::Raise(exc, cause) |
| 68 | 726 } else if is_instance(&ast, &try_type) { |
| 727 let body = ast.getattr(py, "body").unwrap(); | |
| 728 let excepthandlers = ast.getattr(py, "handlers").unwrap(); | |
| 729 let orelse = ast.getattr(py, "orelse").unwrap(); | |
| 730 let finalbody = ast.getattr(py, "finalbody").unwrap(); | |
| 731 | |
| 732 let body = parse_list(py, body, parse_statement); | |
| 733 let excepthandlers = parse_list(py, excepthandlers, parse_excepthandler); | |
| 734 let orelse = parse_list(py, orelse, parse_statement); | |
| 735 let finalbody = parse_list(py, finalbody, parse_statement); | |
| 736 | |
| 737 stmt::Try(body, excepthandlers, orelse, finalbody) | |
| 0 | 738 } else { |
|
13
38b0d63697b1
Import the full AST grammar from CPython 3.5.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
9
diff
changeset
|
739 println!("stmt {}", ast); |
|
38b0d63697b1
Import the full AST grammar from CPython 3.5.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
9
diff
changeset
|
740 panic!() |
| 0 | 741 } |
| 742 } | |
| 743 | |
| 744 #[allow(dead_code)] | |
| 745 pub fn convert_ast(name: String, module: &PyObject) -> Module { | |
| 746 let gil = Python::acquire_gil(); | |
| 747 let py = gil.python(); | |
| 748 | |
| 749 let builtins_module = py.import("builtins").unwrap(); | |
| 750 let isinstance = builtins_module.get(py, "isinstance").unwrap(); | |
| 751 | |
| 752 let ast_module = py.import("ast").unwrap(); | |
| 753 let module_type = ast_module.get(py, "Module").unwrap(); | |
| 754 | |
| 755 assert!(isinstance.call(py, (module, module_type), None).unwrap().is_true(py).unwrap()); | |
| 756 | |
| 757 let body = module.getattr(py, "body").unwrap(); | |
|
20
ace12d6b9855
Replace every loop in ast_convert with parse_list.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
19
diff
changeset
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758 let body = parse_list(py, body, parse_statement); |
|
ace12d6b9855
Replace every loop in ast_convert with parse_list.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
19
diff
changeset
|
759 Module{name: name, statements: body} |
| 0 | 760 } |