Mercurial > python-compiler.rs

annotate src/ast_dump.rs @ 58:a0b23123901b

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Replace "".to_string() and format!("") by String::new().
author Bastien Orivel <eijebong@bananium.fr>
date Sun, 12 Jun 2016 18:52:43 +0200
parents e5a808ec31c0
children 407b3b217928
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 use python_ast::{Module, stmt, expr, boolop, operator, unaryop, cmpop, arguments, arg, keyword, comprehension};
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2
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3 use std::iter;
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4
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5 trait to_string_able {
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6 fn to_string(&self) -> String;
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7 }
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8
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9 impl boolop {
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10 fn to_string(&self) -> &'static str {
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11 match *self {
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12 boolop::And => " and ",
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13 boolop::Or => " or "
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14 }
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15 }
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16 }
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17
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18 impl operator {
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19 fn to_string(&self) -> &'static str {
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20 match *self {
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21 operator::Add => "+",
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22 operator::Sub => "-",
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23 operator::Mult => "*",
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24 operator::MatMult => "@",
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25 operator::Div => "/",
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26 operator::Mod => "%",
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27 operator::Pow => "**",
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28 operator::LShift => "<<",
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29 operator::RShift => ">>",
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30 operator::BitOr => "|",
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31 operator::BitXor => "^",
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32 operator::BitAnd => "&",
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33 operator::FloorDiv => "//",
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34 }
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35 }
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36 }
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37
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38 impl unaryop {
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39 fn to_string(&self) -> &'static str {
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40 match *self {
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41 unaryop::Invert => "~",
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42 unaryop::Not => "not ",
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43 unaryop::UAdd => "+",
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44 unaryop::USub => "-"
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45 }
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46 }
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47 }
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48
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49 impl cmpop {
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50 fn to_string(&self) -> &'static str {
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51 match *self {
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52 cmpop::Eq => "==",
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53 cmpop::NotEq => "!=",
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54 cmpop::Lt => "<",
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55 cmpop::LtE => "<=",
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56 cmpop::Gt => ">",
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57 cmpop::GtE => ">=",
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58 cmpop::Is => "is",
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59 cmpop::IsNot => "is not",
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60 cmpop::In => "in",
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61 cmpop::NotIn => "not in",
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62 }
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63 }
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64 }
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65
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66 fn vec_to_strings_vec<T: to_string_able>(values: Vec<T>) -> Vec<String> {
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67 let mut vector = vec!();
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68 for value in values {
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69 vector.push(value.to_string());
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70 }
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71 vector
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72 }
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73
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74 impl to_string_able for keyword {
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75 fn to_string(&self) -> String {
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76 match self.arg.clone() {
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77 Some(arg) => format!("{}={}", arg, self.value.to_string()),
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78 None => format!("**{}", self.value.to_string())
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79 }
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80 }
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81 }
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82
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83 fn statements_to_string(indent: usize, body: Vec<stmt>) -> String {
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84 let mut statements = vec!();
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85 for statement in body {
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86 statements.push(statement.to_string(indent + 1));
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87 }
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88 statements.join("\n")
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89 }
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90
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91 fn if_else_statements_to_string(indent: usize, body: Vec<stmt>, orelse: Vec<stmt>) -> String {
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92 let body = statements_to_string(indent, body);
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93 if orelse.is_empty() {
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94 body
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95 } else {
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96 format!("{}\n{}else:\n{}", body, make_indent(indent), statements_to_string(indent, orelse))
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97 }
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98 }
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99
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100 impl to_string_able for comprehension {
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101 fn to_string(&self) -> String {
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102 let mut result = vec!();
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103 result.push(format!("for {} in {}", self.target.to_string(), self.iter.to_string()));
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104 for if_ in self.ifs.clone() {
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105 result.push(format!("if {}", if_.to_string()))
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106 }
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107 result.join(" ")
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108 }
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109 }
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110
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111 impl to_string_able for expr {
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112 fn to_string(&self) -> String {
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113 match self.clone() {
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114 expr::BoolOp(op, values) => {
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115 let mut data = vec!();
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116 for value in values {
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117 data.push(value.to_string());
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118 }
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119 data.join(op.to_string())
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120 },
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121 expr::BinOp(a, op, b) => format!("{} {} {}", a.to_string(), op.to_string(), b.to_string()),
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122 expr::UnaryOp(op, operand) => format!("{}{}", op.to_string(), operand.to_string()),
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123
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124 expr::Compare(left, ops, comparators) => format!("{} {}", left.to_string(), {
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125 let mut arguments = vec!();
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126
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127 // XXX: wrong order!
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128 for op in ops {
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129 arguments.push(op.to_string().to_string())
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130 }
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131 for comparator in comparators {
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132 arguments.push(comparator.to_string())
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133 }
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134 /*
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135 for (op, comparator) in ops.zip(comparators) {
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136 let op = op.unwrap();
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137 let comparator = comparator.unwrap();
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138 arguments.push(format!("{} {}", op.to_string(), comparator.to_string()))
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139 }
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140 */
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141
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142 arguments.join(" ")
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143 }),
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144 expr::Call(func, args, keywords) => format!("{}({})", func.to_string(), {
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145 let mut arguments = vec!();
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146 let args = vec_to_strings_vec(args);
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147 let keywords = vec_to_strings_vec(keywords);
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148 arguments.extend(args);
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149 arguments.extend(keywords);
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150 arguments.join(", ")
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151 }),
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152 expr::Num(n) => format!("{}", n),
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153 expr::Str(s) => format!("\"{}\"", s),
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154 expr::NameConstant(name) => format!("{}", name),
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155 expr::Attribute(value, attr, ctx) => format!("{}.{}", value.to_string(), attr),
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156 expr::Name(name, ctx) => format!("{}", name),
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157 expr::List(elts, ctx) => format!("[{}]", vec_to_strings_vec(elts).join(", ")),
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158 expr::ListComp(elt, generators) => format!("[{} {}]", elt.to_string(), vec_to_strings_vec(generators).join(" ")),
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159 expr::DictComp(key, value, generators) => format!("{{{}: {} {}}}", key.to_string(), value.to_string(), vec_to_strings_vec(generators).join(" ")),
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160 expr::Tuple(elts, ctx) => format!("({})", vec_to_strings_vec(elts).join(", ")),
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161 expr::Ellipsis => format!("..."),
0
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162 }
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163 }
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164 }
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165
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166 impl to_string_able for arg {
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167 fn to_string(&self) -> String {
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168 match self.annotation {
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169 None => self.arg.clone(),
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170 Some(ref annotation) => format!("{}: {}", self.arg, annotation.to_string())
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171 }
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172 }
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173 }
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174
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175 impl to_string_able for arguments {
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176 fn to_string(&self) -> String {
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177 let mut args = vec!();
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178 let num_args = self.args.len();
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179 let num_defaults = self.defaults.len();
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180
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181 let mut normal_args = self.args.clone();
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182 let defaulted_args = normal_args.split_off(num_args - num_defaults);
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183 for arg in normal_args {
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184 args.push(arg.to_string());
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185 }
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186 for (arg, default) in defaulted_args.iter().zip(self.defaults.iter()) {
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187 args.push(format!("{}={}", arg.to_string(), default.to_string()));
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188 }
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189
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190 if !self.kwonlyargs.is_empty() {
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191 match self.vararg {
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192 None => args.push("*".to_string()),
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193 Some(ref vararg) => args.push(format!("*{}", vararg.to_string())),
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194 }
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195 }
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196 for (arg, default) in self.kwonlyargs.iter().zip(self.kw_defaults.iter()) {
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197 let arg = arg.to_string();
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198 match *default {
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199 Some(ref default) => args.push(format!("{}={}", arg, default.to_string())),
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200 None => args.push(arg)
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201 }
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202 }
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203 match self.kwarg {
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204 Some(ref kwarg) => args.push(format!("**{}", kwarg.to_string())),
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205 None => ()
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206 }
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207 args.join(", ")
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208 }
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209 }
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210
0
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211 fn make_indent(indent: usize) -> String {
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212 iter::repeat(" ").take(indent).collect()
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213 }
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214
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215 impl stmt {
0
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216 fn to_string(&self, indent: usize) -> String {
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217 let current_indent = make_indent(indent);
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218 match self.clone() {
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219 stmt::ClassDef(name, bases, keywords, body, decorator_list) => format!("{}class {}({}):\n{}", current_indent, name, vec_to_strings_vec(bases).join(", "), statements_to_string(indent, body)),
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220 stmt::FunctionDef(name, arguments, body, decorator_list, returns) => format!("{}def {}({}):\n{}", current_indent, name, arguments.to_string(), statements_to_string(indent, body)),
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221 stmt::Global(names) => format!("{}global {}", current_indent, names.join(", ")),
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222 stmt::Nonlocal(names) => format!("{}nonlocal {}", current_indent, names.join(", ")),
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223 stmt::If(test, body, orelse) => format!("{}if {}:\n{}", current_indent, test.to_string(), if_else_statements_to_string(indent, body, orelse)),
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224 stmt::While(test, body, orelse) => format!("{}while {}:\n{}", current_indent, test.to_string(), if_else_statements_to_string(indent, body, orelse)),
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225 stmt::For(target, iter, body, orelse) => format!("{}for {} in {}:\n{}", current_indent, target.to_string(), iter.to_string(), if_else_statements_to_string(indent, body, orelse)),
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226 stmt::Assign(targets, value) => format!("{}{} = {}", current_indent, vec_to_strings_vec(targets).join(", "), value.to_string()),
13
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227 stmt::AugAssign(target, op, value) => format!("{}{} {}= {}", current_indent, target.to_string(), op.to_string(), value.to_string()),
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228 stmt::Return(expr) => format!("{}return{}", current_indent, match expr {
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229 Some(expr) => format!(" {}", expr.to_string()),
58
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230 None => String::new()
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231 }),
48
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232 stmt::ImportFrom(module, names, level) => {
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233 format!("{}from {}{} import {}",
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234 current_indent,
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235 {
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236 match level {
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237 None => String::new(),
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238 Some(level) => { let dots: String = iter::repeat(".").take(level as usize).collect(); dots }
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239 }
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240 },
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241 module.to_string(),
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242 {
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243 let mut names_ = vec!();
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244 for name in names {
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245 match name.asname {
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246 None => names_.push(name.name),
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247 Some(asname) => names_.push(format!("{} as {}", name.name, asname))
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248 }
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249 }
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250 names_.join(", ")
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5f1d285471af Finish ImportFrom conversion and add a test for it.
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251 }
48
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252 )
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diff changeset
253 },
47
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diff changeset
254 stmt::Import(names) => format!("{}import {}", current_indent, {
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diff changeset
255 let mut names_ = vec!();
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256 for name in names {
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257 match name.asname {
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258 None => names_.push(name.name),
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259 Some(asname) => names_.push(format!("{} as {}", name.name, asname))
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260 }
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261 }
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262 names_.join(", ")
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263 }),
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38b0d63697b1 Import the full AST grammar from CPython 3.5.
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264 stmt::Expr(expr) => format!("{}{}", current_indent, expr.to_string()),
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7af637f444d1 Add ast.Delete
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265 stmt::Break => format!("{}break", current_indent),
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ad2453a55820 Refactor all Vec<T> -> Vec<String> functions into a single one.
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266 stmt::Delete(targets) => format!("{}del {}", current_indent, vec_to_strings_vec(targets).join(", ")),
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267 stmt::Pass => format!("{}pass", current_indent),
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268 stmt::Continue => format!("{}continue", current_indent),
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269 stmt::Assert(test, msg) => {
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270 format!("{}assert {}{}",
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271 current_indent,
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272 test.to_string(),
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273 {
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274 match msg {
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275 Some(msg) => format!(", {}", msg.to_string()),
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276 None => String::new()
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277 }
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278 }
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279 )
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280 }
0
211b0df72e64 Hello world!
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281 }
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282 }
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283 }
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284
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285 #[allow(dead_code)]
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25b202005d1d Return a String from ast_dump instead of printing it directly.
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286 pub fn dump_ast(ast: &Module) -> String {
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287 let mut dumped_statements = vec!();
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288 for statement in &ast.statements {
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289 let dumped_statement = statement.to_string(0);
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290 dumped_statements.push(dumped_statement);
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291 }
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292 dumped_statements.join("\n")
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293 }
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294