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4
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1 %skeleton "lalr1.cc"
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2 %define "parser_class_name" "script_parser"
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3 %defines
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4 %{
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5 #ifdef _MSC_VER
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6 #pragma warning(disable: 4800)
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7 #pragma warning(disable: 4267)
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8 #endif
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9
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10 #include <string>
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11 #include "node.h"
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12 class compiler;
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13 %}
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14 %parse-param { compiler& driver }
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15 %lex-param { compiler& driver }
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16 %locations
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5
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17 %expect 1 /* if文で衝突が発生するので、１つの衝突は無視 */
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4
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18 %initial-action
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19 {
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5
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20 // ロケーション初期化
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4
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21 @$.begin.filename = @$.end.filename = &driver.get_filename();
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22 } ;
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23 // %debug
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24 %error-verbose
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25 // Symbols.
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26 %union
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27 {
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28 int ival;
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29 std::string *sval;
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30
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31 int type;
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32 CValueList *value_list;
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33 CArgList *arglist;
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34 CDeclList *decls;
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35 CStateList *states;
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36 CStatement *statement;
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37 CArgDef *argdef;
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38 CArgs *args;
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39 CValueNode *value;
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40 CNode *expr;
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41 CAssign *assign;
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42 CStateBlock *block;
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43 }
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44 %{
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45 #include "compiler.h"
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46 %}
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47
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48 %token END_OF_FILE 0 "end of file"
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49 %token <ival> TK_IVAL "ival"
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50 %token <sval> TK_IDENTIFIER "identifier"
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51 %token <sval> TK_SVAL "sval"
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52 %token TK_LOGOR "||"
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53 %token TK_LOGAND "&&"
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54 %token TK_EQ "=="
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55 %token TK_NE "!="
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56 %token TK_GE ">="
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57 %token TK_LE "<="
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58 %token TK_LSHIFT "<<"
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59 %token TK_RSHIFT ">>"
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60 %token TK_ADD_ASSIGN "+="
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61 %token TK_SUB_ASSIGN "-="
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62 %token TK_MUL_ASSIGN "*="
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63 %token TK_DIV_ASSIGN "/="
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64 %token TK_MOD_ASSIGN "%="
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65
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66 %token TK_IF "if"
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67 %token TK_ELSE "else"
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68 %token TK_WHILE "while"
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69 %token TK_FOR "for"
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70 %token TK_SWITCH "switch"
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71 %token TK_CASE "case"
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72 %token TK_DEFAULT "default"
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73 %token TK_BREAK "break"
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74 %token TK_RETURN "return"
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75 %token TK_INTEGER "int"
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76 %token TK_STRING "string"
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77 %token TK_VOID "void"
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5
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78 %token TK_CODE "__code"
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4
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79
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80 %type <expr> expr
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81 %type <value> value
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82 %type <assign> assign
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83 %type <value_list> value_list
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84 %type <arglist> arglist
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85 %type <argdef> arg
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86 %type <decls> decls decl_list
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87 %type <states> states state_list
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88 %type <block> block
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89 %type <args> args
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90 %type <statement> statement
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91 %type <type> type
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92
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93 %destructor { delete $$; } "identifier"
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94 %destructor { delete $$; } "sval"
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95
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96 %destructor { delete $$; } value_list
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97 %destructor { delete $$; } arglist
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98 %destructor { delete $$; } arg
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99 %destructor { delete $$; } decls decl_list
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100 %destructor { delete $$; } states state_list
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101 %destructor { delete $$; } args
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102 %destructor { delete $$; } block
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103 %destructor { delete $$; } assign
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104 %destructor { delete $$; } statement
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105 %destructor { delete $$; } value
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106 %destructor { delete $$; } expr
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107
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108 %left "||";
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109 %left "&&";
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110 %nonassoc "==" "!=" '>' '<' ">=" "<=";
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111 %left '&' '|';
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112 %left "<<" ">>";
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113 %left '+' '-';
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114 %left '*' '/' '%';
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115 %left NEG;
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116 %%
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117 %start unit;
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118
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119 unit : define_or_state
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120 | unit define_or_state
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121 ;
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122
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123 define_or_state : error ';'
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124 | function
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125 | declaration
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126 ;
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127
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128 declaration : type value_list ';' { driver.DefineValue(@2, $1, $2); }
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129 | type "identifier" '(' ')' ';' { driver.DefineFunction(@2, $1, $2, NULL); }
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130 | type "identifier" '(' arglist ')' ';' { driver.DefineFunction(@2, $1, $2, $4); }
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131 | "void" "identifier" '(' ')' ';' { driver.DefineFunction(@2, TYPE_VOID, $2, NULL); }
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132 | "void" "identifier" '(' arglist ')' ';' { driver.DefineFunction(@2, TYPE_VOID, $2, $4); }
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5
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133 | "__code" "identifier" '(' ')' ';' { driver.DefineFunction(@2, TYPE_CODE, $2, NULL); }
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134 | "__code" "identifier" '(' arglist ')' ';' { driver.DefineFunction(@2, TYPE_CODE, $2, $4); }
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4
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135 ;
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136
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137 value_list : value { $$ = new CValueList($1); }
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138 | value_list ',' value { $$ = $1->Add($3); }
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139 ;
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140
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141 arglist : arg { $$ = new CArgList($1); }
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142 | arglist ',' arg { $$ = $1->Add($3); }
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143 ;
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144
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145 arg : type { $$ = new CArgDef(@1, $1, NULL); }
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146 | type '&' { $$ = new CArgDef(@1, TypeToRef($1), NULL); }
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147 | type "identifier" { $$ = new CArgDef(@1, $1, $2); }
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148 | type '&' "identifier" { $$ = new CArgDef(@1, TypeToRef($1), $3); }
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149 | type "identifier" '[' ']' { $$ = new CArgDef(@1, TypeToRef($1), $2); }
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150 | type '&' "identifier" '[' ']' { $$ = new CArgDef(@1, TypeToRef($1), $3); }
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151 ;
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152
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153 function : type "identifier" '(' ')' block { driver.AddFunction(@1, $1, $2, NULL, $5); }
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154 | type "identifier" '(' arglist ')' block { driver.AddFunction(@1, $1, $2, $4, $6); }
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155 | "void" "identifier" '(' ')' block { driver.AddFunction(@1, TYPE_VOID, $2, NULL, $5); }
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156 | "void" "identifier" '(' arglist ')' block { driver.AddFunction(@1, TYPE_VOID, $2, $4, $6); }
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5
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157 | "__code" "identifier" '(' ')' block { driver.AddGotoFunction(@1, TYPE_CODE, $2, NULL, $5); }
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158 | "__code" "identifier" '(' arglist ')' block { driver.AddGotoFunction(@1, TYPE_CODE, $2, $4, $6); }
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4
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159 ;
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160
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161 type : "int" { $$ = TYPE_INTEGER; }
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162 | "string" { $$ = TYPE_STRING; }
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163 ;
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164
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165 block : '{' decl_list state_list '}' { $$ = new CStateBlock($2, $3); }
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166 ;
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167
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168 decl_list : { $$ = NULL }
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169 | decls { $$ = $1 }
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170 ;
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171
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172 state_list : { $$ = NULL }
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173 | states { $$ = $1 }
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174 ;
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175
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176 decls : type value_list ';' { $$ = new CDeclList(new CDecl($1, $2)); }
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177 | decls type value_list ';' { $$ = $1->Add(new CDecl($2, $3)); }
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178 ;
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179
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180 states : statement { $$ = new CStateList($1); }
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181 | states statement { $$ = $1->Add($2); }
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182 ;
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183
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184 statement : ';' { $$ = new CNopStatement(@1); }
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185 | assign ';' { $$ = new CAssignStatement(@1, $1); }
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186 | "identifier" '(' args ')' ';' { $$ = new CFunctionStatement(@1, $1, $3); }
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187 | "identifier" '(' ')' ';' { $$ = new CFunctionStatement(@1, $1, NULL); }
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188 | "case" expr ':' { $$ = new CCaseStatement(@1, $2); }
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189 | "default" ':' { $$ = new CDefaultStatement(@1); }
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190 | "break" ';' { $$ = new CBreakStatement(@1); }
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191 | "return" ';' { $$ = new CReturnStatement(@1, NULL); }
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192 | "return" expr ';' { $$ = new CReturnStatement(@1, $2); }
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193 | "if" '(' expr ')' statement { $$ = new CIfStatement(@1, $3, $5); }
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194 | "if" '(' expr ')' statement "else" statement { $$ = new CIfStatement(@1, $3, $5, $7); }
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195 | "for" '(' assign ';' expr ';' assign ')' statement
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196 { $$ = new CForStatement(@1, $3, $5, $7, $9); }
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197 | "while" '(' expr ')' statement { $$ = new CWhileStatement(@1, $3, $5); }
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198 | "switch" '(' expr ')' '{' state_list '}' { $$ = new CSwitchStatement(@1, $3, $6); }
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199 | block { $$ = new CBlockStatement(@1, $1); }
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200 ;
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201
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202 assign : value '=' expr { $$ = new CAssign(@1, '=', $1, $3); }
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203 | value "+=" expr { $$ = new CAssign(@1, '+', $1, $3); }
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204 | value "-=" expr { $$ = new CAssign(@1, '-', $1, $3); }
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205 | value "*=" expr { $$ = new CAssign(@1, '*', $1, $3); }
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206 | value "/=" expr { $$ = new CAssign(@1, '/', $1, $3); }
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207 | value "%=" expr { $$ = new CAssign(@1, '%', $1, $3); }
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208 ;
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209
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210 expr : expr "&&" expr { $$ = CNode::MakeNode(driver, @2, OP_LOGAND, $1, $3); }
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211 | expr "||" expr { $$ = CNode::MakeNode(driver, @2, OP_LOGOR, $1, $3); }
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212 | expr "==" expr { $$ = CNode::MakeNode(driver, @2, OP_EQ, $1, $3); }
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213 | expr "!=" expr { $$ = CNode::MakeNode(driver, @2, OP_NE, $1, $3); }
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214 | expr '>' expr { $$ = CNode::MakeNode(driver, @2, OP_GT, $1, $3); }
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215 | expr ">=" expr { $$ = CNode::MakeNode(driver, @2, OP_GE, $1, $3); }
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216 | expr '<' expr { $$ = CNode::MakeNode(driver, @2, OP_LT, $1, $3); }
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217 | expr "<=" expr { $$ = CNode::MakeNode(driver, @2, OP_LE, $1, $3); }
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218 | expr '&' expr { $$ = CNode::MakeNode(driver, @2, OP_AND, $1, $3); }
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219 | expr '|' expr { $$ = CNode::MakeNode(driver, @2, OP_OR, $1, $3); }
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220 | expr "<<" expr { $$ = CNode::MakeNode(driver, @2, OP_LSHIFT, $1, $3); }
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221 | expr ">>" expr { $$ = CNode::MakeNode(driver, @2, OP_RSHIFT, $1, $3); }
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222 | expr '-' expr { $$ = CNode::MakeNode(driver, @2, OP_MINUS, $1, $3); }
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223 | expr '+' expr { $$ = CNode::MakeNode(driver, @2, OP_PLUS, $1, $3); }
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224 | expr '*' expr { $$ = CNode::MakeNode(driver, @2, OP_TIMES, $1, $3); }
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225 | expr '/' expr { $$ = CNode::MakeNode(driver, @2, OP_DIVIDE, $1, $3); }
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226 | expr '%' expr { $$ = CNode::MakeNode(driver, @2, OP_MOD, $1, $3); }
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227 | '-' expr %prec NEG { $$ = CNode::MakeNode(driver, @2, OP_NEG, $2); }
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228 | '(' expr ')' { $$ = $2; }
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229 | value { $$ = $1; }
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230 | "ival" { $$ = new CNode(@1, OP_CONST, $1); }
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231 | "sval" { $$ = new CNode(@1, OP_STRING, $1); }
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232 | "identifier" '(' args ')' { $$ = new CFunctionNode(@1, $1, $3); }
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233 | "identifier" '(' ')' { $$ = new CFunctionNode(@1, $1, NULL); }
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234 ;
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235
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236 value : "identifier" { $$ = new CValueNode(@1, $1); }
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237 | "identifier" '[' expr ']' { $$ = new CValueNode(@1, $1, $3); }
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238 ;
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239
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240 args : expr { $$ = new CArgs($1); }
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241 | args ',' expr { $$ = $1->Add($3); }
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242 ;
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243
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244 %%
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245 void yy::script_parser::error(const yy::script_parser::location_type& l, const std::string& m)
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246 {
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247 driver.error(l, m);
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248 }
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