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1 | /* perly.y |
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2 | * |
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3 | * Copyright (c) 1991-2002, 2003, 2004 Larry Wall |
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4 | * |
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5 | * You may distribute under the terms of either the GNU General Public |
6 | * License or the Artistic License, as specified in the README file. |
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7 | * |
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8 | */ |
9 | |
10 | /* |
11 | * 'I see,' laughed Strider. 'I look foul and feel fair. Is that it? |
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12 | * All that is gold does not glitter, not all those who wander are lost.' |
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13 | */ |
14 | |
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15 | /* This file holds the grammar for the Perl language. If edited, you need |
16 | * to run regen_perly.pl, which re-creates the files perly.h, perly.tab |
17 | * and perly.act which are derived from this. |
18 | * |
19 | * The main job of of this grammar is to call the various newFOO() |
20 | * functions in op.c to build a syntax tree of OP structs. |
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21 | * It relies on the lexer in toke.c to do the tokenizing. |
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22 | */ |
23 | |
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24 | /* Make the parser re-entrant. */ |
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25 | |
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26 | %pure_parser |
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27 | |
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28 | %start prog |
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29 | |
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30 | %union { |
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31 | I32 ival; |
32 | char *pval; |
33 | OP *opval; |
34 | GV *gvval; |
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35 | } |
36 | |
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37 | %token <ival> '{' |
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38 | |
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39 | %token <opval> WORD METHOD FUNCMETH THING PMFUNC PRIVATEREF |
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40 | %token <opval> FUNC0SUB UNIOPSUB LSTOPSUB |
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41 | %token <pval> LABEL |
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42 | %token <ival> FORMAT SUB ANONSUB PACKAGE USE |
79072805 |
43 | %token <ival> WHILE UNTIL IF UNLESS ELSE ELSIF CONTINUE FOR |
44 | %token <ival> LOOPEX DOTDOT |
36477c24 |
45 | %token <ival> FUNC0 FUNC1 FUNC UNIOP LSTOP |
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46 | %token <ival> RELOP EQOP MULOP ADDOP |
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47 | %token <ival> DOLSHARP DO HASHBRACK NOAMP |
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48 | %token <ival> LOCAL MY MYSUB |
49 | %token COLONATTR |
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50 | |
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51 | %type <ival> prog decl format startsub startanonsub startformsub |
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52 | %type <ival> progstart remember mremember '&' savescope |
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53 | %type <opval> block mblock lineseq line loop cond else |
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54 | %type <opval> expr term subscripted scalar ary hsh arylen star amper sideff |
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55 | %type <opval> argexpr nexpr texpr iexpr mexpr mnexpr mtexpr miexpr |
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56 | %type <opval> listexpr listexprcom indirob listop method |
57 | %type <opval> formname subname proto subbody cont my_scalar |
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58 | %type <opval> subattrlist myattrlist mysubrout myattrterm myterm |
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59 | %type <opval> termbinop termunop anonymous termdo |
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60 | %type <pval> label |
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61 | |
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62 | %nonassoc PREC_LOW |
63 | %nonassoc LOOPEX |
64 | |
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65 | %left <ival> OROP DOROP |
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66 | %left ANDOP |
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67 | %right NOTOP |
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68 | %nonassoc LSTOP LSTOPSUB |
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69 | %left ',' |
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70 | %right <ival> ASSIGNOP |
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71 | %right '?' ':' |
72 | %nonassoc DOTDOT |
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73 | %left OROR DORDOR |
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74 | %left ANDAND |
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75 | %left <ival> BITOROP |
76 | %left <ival> BITANDOP |
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77 | %nonassoc EQOP |
78 | %nonassoc RELOP |
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79 | %nonassoc UNIOP UNIOPSUB |
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80 | %left <ival> SHIFTOP |
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81 | %left ADDOP |
82 | %left MULOP |
8990e307 |
83 | %left <ival> MATCHOP |
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84 | %right '!' '~' UMINUS REFGEN |
85 | %right <ival> POWOP |
86 | %nonassoc PREINC PREDEC POSTINC POSTDEC |
8990e307 |
87 | %left ARROW |
fad39ff1 |
88 | %nonassoc <ival> ')' |
8d063cd8 |
89 | %left '(' |
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90 | %left '[' '{' |
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91 | |
92 | %% /* RULES */ |
93 | |
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94 | /* The whole program */ |
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95 | prog : progstart |
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96 | /*CONTINUED*/ lineseq |
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97 | { $$ = $1; newPROG(block_end($1,$2)); } |
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98 | ; |
99 | |
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100 | /* An ordinary block */ |
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101 | block : '{' remember lineseq '}' |
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102 | { if (PL_copline > (line_t)$1) |
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103 | PL_copline = (line_t)$1; |
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104 | $$ = block_end($2, $3); } |
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105 | ; |
106 | |
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107 | remember: /* NULL */ /* start a full lexical scope */ |
108 | { $$ = block_start(TRUE); } |
109 | ; |
110 | |
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111 | progstart: |
112 | { |
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113 | PL_expect = XSTATE; $$ = block_start(TRUE); |
114 | } |
115 | ; |
116 | |
117 | |
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118 | mblock : '{' mremember lineseq '}' |
3280af22 |
119 | { if (PL_copline > (line_t)$1) |
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120 | PL_copline = (line_t)$1; |
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121 | $$ = block_end($2, $3); } |
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122 | ; |
123 | |
124 | mremember: /* NULL */ /* start a partial lexical scope */ |
125 | { $$ = block_start(FALSE); } |
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126 | ; |
127 | |
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128 | savescope: /* NULL */ /* remember stack pos in case of error */ |
129 | { $$ = PL_savestack_ix; } |
130 | |
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131 | /* A collection of "lines" in the program */ |
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132 | lineseq : /* NULL */ |
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133 | { $$ = Nullop; } |
134 | | lineseq decl |
135 | { $$ = $1; } |
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136 | | lineseq savescope line |
137 | { LEAVE_SCOPE($2); |
138 | $$ = append_list(OP_LINESEQ, |
139 | (LISTOP*)$1, (LISTOP*)$3); |
3280af22 |
140 | PL_pad_reset_pending = TRUE; |
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141 | if ($1 && $3) PL_hints |= HINT_BLOCK_SCOPE; } |
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142 | ; |
143 | |
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144 | /* A "line" in the program */ |
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145 | line : label cond |
146 | { $$ = newSTATEOP(0, $1, $2); } |
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147 | | loop /* loops add their own labels */ |
148 | | label ';' |
149 | { if ($1 != Nullch) { |
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150 | $$ = newSTATEOP(0, $1, newOP(OP_NULL, 0)); |
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151 | } |
152 | else { |
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153 | $$ = Nullop; |
3280af22 |
154 | PL_copline = NOLINE; |
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155 | } |
3280af22 |
156 | PL_expect = XSTATE; } |
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157 | | label sideff ';' |
79072805 |
158 | { $$ = newSTATEOP(0, $1, $2); |
3280af22 |
159 | PL_expect = XSTATE; } |
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160 | ; |
161 | |
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162 | /* An expression which may have a side-effect */ |
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163 | sideff : error |
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164 | { $$ = Nullop; } |
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165 | | expr |
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166 | { $$ = $1; } |
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167 | | expr IF expr |
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168 | { $$ = newLOGOP(OP_AND, 0, $3, $1); } |
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169 | | expr UNLESS expr |
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170 | { $$ = newLOGOP(OP_OR, 0, $3, $1); } |
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171 | | expr WHILE expr |
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172 | { $$ = newLOOPOP(OPf_PARENS, 1, scalar($3), $1); } |
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173 | | expr UNTIL iexpr |
174 | { $$ = newLOOPOP(OPf_PARENS, 1, $3, $1);} |
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175 | | expr FOR expr |
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176 | { $$ = newFOROP(0, Nullch, (line_t)$2, |
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177 | Nullop, $3, $1, Nullop); } |
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178 | ; |
179 | |
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180 | /* else and elsif blocks */ |
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181 | else : /* NULL */ |
182 | { $$ = Nullop; } |
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183 | | ELSE mblock |
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184 | { ($2)->op_flags |= OPf_PARENS; $$ = scope($2); } |
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185 | | ELSIF '(' mexpr ')' mblock else |
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186 | { PL_copline = (line_t)$1; |
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187 | $$ = newCONDOP(0, $3, scope($5), $6); |
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188 | PL_hints |= HINT_BLOCK_SCOPE; } |
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189 | ; |
190 | |
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191 | /* Real conditional expressions */ |
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192 | cond : IF '(' remember mexpr ')' mblock else |
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193 | { PL_copline = (line_t)$1; |
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194 | $$ = block_end($3, |
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195 | newCONDOP(0, $4, scope($6), $7)); } |
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196 | | UNLESS '(' remember miexpr ')' mblock else |
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197 | { PL_copline = (line_t)$1; |
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198 | $$ = block_end($3, |
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199 | newCONDOP(0, $4, scope($6), $7)); } |
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200 | ; |
201 | |
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202 | /* Continue blocks */ |
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203 | cont : /* NULL */ |
204 | { $$ = Nullop; } |
205 | | CONTINUE block |
206 | { $$ = scope($2); } |
207 | ; |
208 | |
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209 | /* Loops: while, until, for, and a bare block */ |
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210 | loop : label WHILE '(' remember mtexpr ')' mblock cont |
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211 | { PL_copline = (line_t)$2; |
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212 | $$ = block_end($4, |
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213 | newSTATEOP(0, $1, |
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214 | newWHILEOP(0, 1, (LOOP*)Nullop, |
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215 | $2, $5, $7, $8))); } |
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216 | | label UNTIL '(' remember miexpr ')' mblock cont |
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217 | { PL_copline = (line_t)$2; |
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218 | $$ = block_end($4, |
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219 | newSTATEOP(0, $1, |
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220 | newWHILEOP(0, 1, (LOOP*)Nullop, |
fb73857a |
221 | $2, $5, $7, $8))); } |
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222 | | label FOR MY remember my_scalar '(' mexpr ')' mblock cont |
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223 | { $$ = block_end($4, |
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224 | newFOROP(0, $1, (line_t)$2, $5, $7, $9, $10)); } |
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225 | | label FOR scalar '(' remember mexpr ')' mblock cont |
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226 | { $$ = block_end($5, |
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227 | newFOROP(0, $1, (line_t)$2, mod($3, OP_ENTERLOOP), |
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228 | $6, $8, $9)); } |
229 | | label FOR '(' remember mexpr ')' mblock cont |
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230 | { $$ = block_end($4, |
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231 | newFOROP(0, $1, (line_t)$2, Nullop, $5, $7, $8)); } |
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232 | | label FOR '(' remember mnexpr ';' mtexpr ';' mnexpr ')' mblock |
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233 | /* basically fake up an initialize-while lineseq */ |
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234 | { OP *forop; |
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235 | PL_copline = (line_t)$2; |
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236 | forop = newSTATEOP(0, $1, |
237 | newWHILEOP(0, 1, (LOOP*)Nullop, |
238 | $2, scalar($7), |
239 | $11, $9)); |
240 | if ($5) { |
241 | forop = append_elem(OP_LINESEQ, |
242 | newSTATEOP(0, ($1?savepv($1):Nullch), |
243 | $5), |
244 | forop); |
245 | } |
246 | |
247 | $$ = block_end($4, forop); } |
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248 | | label block cont /* a block is a loop that happens once */ |
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249 | { $$ = newSTATEOP(0, $1, |
250 | newWHILEOP(0, 1, (LOOP*)Nullop, |
251 | NOLINE, Nullop, $2, $3)); } |
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252 | ; |
253 | |
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254 | /* Normal expression */ |
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255 | nexpr : /* NULL */ |
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256 | { $$ = Nullop; } |
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257 | | sideff |
258 | ; |
259 | |
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260 | /* Boolean expression */ |
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261 | texpr : /* NULL means true */ |
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262 | { (void)scan_num("1", &yylval); $$ = yylval.opval; } |
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263 | | expr |
264 | ; |
265 | |
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266 | /* Inverted boolean expression */ |
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267 | iexpr : expr |
268 | { $$ = invert(scalar($1)); } |
269 | ; |
270 | |
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271 | /* Expression with its own lexical scope */ |
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272 | mexpr : expr |
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273 | { $$ = $1; intro_my(); } |
274 | ; |
275 | |
276 | mnexpr : nexpr |
277 | { $$ = $1; intro_my(); } |
55497cff |
278 | ; |
279 | |
280 | mtexpr : texpr |
bbce6d69 |
281 | { $$ = $1; intro_my(); } |
55497cff |
282 | ; |
283 | |
284 | miexpr : iexpr |
bbce6d69 |
285 | { $$ = $1; intro_my(); } |
55497cff |
286 | ; |
287 | |
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288 | /* Optional "MAIN:"-style loop labels */ |
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289 | label : /* empty */ |
290 | { $$ = Nullch; } |
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291 | | LABEL |
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292 | ; |
293 | |
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294 | /* Some kind of declaration - does not take part in the parse tree */ |
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295 | decl : format |
296 | { $$ = 0; } |
297 | | subrout |
298 | { $$ = 0; } |
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299 | | mysubrout |
300 | { $$ = 0; } |
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301 | | package |
302 | { $$ = 0; } |
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303 | | use |
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304 | { $$ = 0; } |
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305 | ; |
306 | |
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307 | format : FORMAT startformsub formname block |
a0d0e21e |
308 | { newFORM($2, $3, $4); } |
44a8e56a |
309 | ; |
310 | |
311 | formname: WORD { $$ = $1; } |
312 | | /* NULL */ { $$ = Nullop; } |
8d063cd8 |
313 | ; |
314 | |
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315 | /* Unimplemented "my sub foo { }" */ |
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316 | mysubrout: MYSUB startsub subname proto subattrlist subbody |
317 | { newMYSUB($2, $3, $4, $5, $6); } |
318 | ; |
319 | |
891be019 |
320 | /* Subroutine definition */ |
09bef843 |
321 | subrout : SUB startsub subname proto subattrlist subbody |
322 | { newATTRSUB($2, $3, $4, $5, $6); } |
28757baa |
323 | ; |
324 | |
fa83b5b6 |
325 | startsub: /* NULL */ /* start a regular subroutine scope */ |
774d564b |
326 | { $$ = start_subparse(FALSE, 0); } |
28757baa |
327 | ; |
328 | |
329 | startanonsub: /* NULL */ /* start an anonymous subroutine scope */ |
774d564b |
330 | { $$ = start_subparse(FALSE, CVf_ANON); } |
28757baa |
331 | ; |
332 | |
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333 | startformsub: /* NULL */ /* start a format subroutine scope */ |
774d564b |
334 | { $$ = start_subparse(TRUE, 0); } |
44a8e56a |
335 | ; |
336 | |
891be019 |
337 | /* Name of a subroutine - must be a bareword, could be special */ |
2d8e6c8d |
338 | subname : WORD { STRLEN n_a; char *name = SvPV(((SVOP*)$1)->op_sv,n_a); |
e858de61 |
339 | if (strEQ(name, "BEGIN") || strEQ(name, "END") |
7d30b5c4 |
340 | || strEQ(name, "INIT") || strEQ(name, "CHECK")) |
1aff0e91 |
341 | CvSPECIAL_on(PL_compcv); |
28757baa |
342 | $$ = $1; } |
a0d0e21e |
343 | ; |
344 | |
891be019 |
345 | /* Subroutine prototype */ |
4633a7c4 |
346 | proto : /* NULL */ |
347 | { $$ = Nullop; } |
348 | | THING |
349 | ; |
28757baa |
350 | |
891be019 |
351 | /* Optional list of subroutine attributes */ |
09bef843 |
352 | subattrlist: /* NULL */ |
353 | { $$ = Nullop; } |
354 | | COLONATTR THING |
355 | { $$ = $2; } |
356 | | COLONATTR |
357 | { $$ = Nullop; } |
358 | ; |
359 | |
891be019 |
360 | /* List of attributes for a "my" variable declaration */ |
09bef843 |
361 | myattrlist: COLONATTR THING |
362 | { $$ = $2; } |
363 | | COLONATTR |
364 | { $$ = Nullop; } |
365 | ; |
366 | |
891be019 |
367 | /* Subroutine body - either null or a block */ |
28757baa |
368 | subbody : block { $$ = $1; } |
3280af22 |
369 | | ';' { $$ = Nullop; PL_expect = XSTATE; } |
8d063cd8 |
370 | ; |
371 | |
a687059c |
372 | package : PACKAGE WORD ';' |
79072805 |
373 | { package($2); } |
a687059c |
374 | ; |
375 | |
28757baa |
376 | use : USE startsub |
1aff0e91 |
377 | { CvSPECIAL_on(PL_compcv); /* It's a BEGIN {} */ } |
28757baa |
378 | WORD WORD listexpr ';' |
379 | { utilize($1, $2, $4, $5, $6); } |
85e6fe83 |
380 | ; |
381 | |
891be019 |
382 | /* Ordinary expressions; logical combinations */ |
a0d0e21e |
383 | expr : expr ANDOP expr |
384 | { $$ = newLOGOP(OP_AND, 0, $1, $3); } |
385 | | expr OROP expr |
386 | { $$ = newLOGOP($2, 0, $1, $3); } |
c963b151 |
387 | | expr DOROP expr |
388 | { $$ = newLOGOP(OP_DOR, 0, $1, $3); } |
fad39ff1 |
389 | | argexpr %prec PREC_LOW |
a0d0e21e |
390 | ; |
391 | |
891be019 |
392 | /* Expressions are a list of terms joined by commas */ |
a0d0e21e |
393 | argexpr : argexpr ',' |
394 | { $$ = $1; } |
395 | | argexpr ',' term |
79072805 |
396 | { $$ = append_elem(OP_LIST, $1, $3); } |
fad39ff1 |
397 | | term %prec PREC_LOW |
8d063cd8 |
398 | ; |
399 | |
891be019 |
400 | /* List operators */ |
401 | listop : LSTOP indirob argexpr /* print $fh @args */ |
79072805 |
402 | { $$ = convert($1, OPf_STACKED, |
a0d0e21e |
403 | prepend_elem(OP_LIST, newGVREF($1,$2), $3) ); } |
891be019 |
404 | | FUNC '(' indirob expr ')' /* print ($fh @args */ |
79072805 |
405 | { $$ = convert($1, OPf_STACKED, |
a0d0e21e |
406 | prepend_elem(OP_LIST, newGVREF($1,$3), $4) ); } |
891be019 |
407 | | term ARROW method '(' listexprcom ')' /* $foo->bar(list) */ |
4633a7c4 |
408 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
a0d0e21e |
409 | append_elem(OP_LIST, |
55497cff |
410 | prepend_elem(OP_LIST, scalar($1), $5), |
a0d0e21e |
411 | newUNOP(OP_METHOD, 0, $3))); } |
891be019 |
412 | | term ARROW method /* $foo->bar */ |
b1524f17 |
413 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
414 | append_elem(OP_LIST, scalar($1), |
415 | newUNOP(OP_METHOD, 0, $3))); } |
891be019 |
416 | | METHOD indirob listexpr /* new Class @args */ |
4633a7c4 |
417 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
a0d0e21e |
418 | append_elem(OP_LIST, |
4633a7c4 |
419 | prepend_elem(OP_LIST, $2, $3), |
a0d0e21e |
420 | newUNOP(OP_METHOD, 0, $1))); } |
891be019 |
421 | | FUNCMETH indirob '(' listexprcom ')' /* method $object (@args) */ |
4633a7c4 |
422 | { $$ = convert(OP_ENTERSUB, OPf_STACKED, |
a0d0e21e |
423 | append_elem(OP_LIST, |
4633a7c4 |
424 | prepend_elem(OP_LIST, $2, $4), |
a0d0e21e |
425 | newUNOP(OP_METHOD, 0, $1))); } |
891be019 |
426 | | LSTOP listexpr /* print @args */ |
79072805 |
427 | { $$ = convert($1, 0, $2); } |
891be019 |
428 | | FUNC '(' listexprcom ')' /* print (@args) */ |
79072805 |
429 | { $$ = convert($1, 0, $3); } |
ecb2f335 |
430 | | LSTOPSUB startanonsub block /* map { foo } ... */ |
09bef843 |
431 | { $3 = newANONATTRSUB($2, 0, Nullop, $3); } |
891be019 |
432 | listexpr %prec LSTOP /* ... @bar */ |
4633a7c4 |
433 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
28757baa |
434 | append_elem(OP_LIST, |
435 | prepend_elem(OP_LIST, $3, $5), $1)); } |
a687059c |
436 | ; |
437 | |
891be019 |
438 | /* Names of methods. May use $object->$methodname */ |
a0d0e21e |
439 | method : METHOD |
440 | | scalar |
441 | ; |
442 | |
891be019 |
443 | /* Some kind of subscripted expression */ |
444 | subscripted: star '{' expr ';' '}' /* *main::{something} */ |
445 | /* In this and all the hash accessors, ';' is |
446 | * provided by the tokeniser */ |
264e1af3 |
447 | { $$ = newBINOP(OP_GELEM, 0, $1, scalar($3)); |
448 | PL_expect = XOPERATOR; } |
891be019 |
449 | | scalar '[' expr ']' /* $array[$element] */ |
fad39ff1 |
450 | { $$ = newBINOP(OP_AELEM, 0, oopsAV($1), scalar($3)); } |
891be019 |
451 | | term ARROW '[' expr ']' /* somearef->[$element] */ |
fad39ff1 |
452 | { $$ = newBINOP(OP_AELEM, 0, |
453 | ref(newAVREF($1),OP_RV2AV), |
454 | scalar($4));} |
891be019 |
455 | | subscripted '[' expr ']' /* $foo->[$bar]->[$baz] */ |
fad39ff1 |
456 | { $$ = newBINOP(OP_AELEM, 0, |
457 | ref(newAVREF($1),OP_RV2AV), |
458 | scalar($3));} |
891be019 |
459 | | scalar '{' expr ';' '}' /* $foo->{bar();} */ |
fad39ff1 |
460 | { $$ = newBINOP(OP_HELEM, 0, oopsHV($1), jmaybe($3)); |
461 | PL_expect = XOPERATOR; } |
891be019 |
462 | | term ARROW '{' expr ';' '}' /* somehref->{bar();} */ |
fad39ff1 |
463 | { $$ = newBINOP(OP_HELEM, 0, |
464 | ref(newHVREF($1),OP_RV2HV), |
465 | jmaybe($4)); |
466 | PL_expect = XOPERATOR; } |
891be019 |
467 | | subscripted '{' expr ';' '}' /* $foo->[bar]->{baz;} */ |
fad39ff1 |
468 | { $$ = newBINOP(OP_HELEM, 0, |
469 | ref(newHVREF($1),OP_RV2HV), |
470 | jmaybe($3)); |
471 | PL_expect = XOPERATOR; } |
891be019 |
472 | | term ARROW '(' ')' /* $subref->() */ |
fad39ff1 |
473 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
474 | newCVREF(0, scalar($1))); } |
891be019 |
475 | | term ARROW '(' expr ')' /* $subref->(@args) */ |
fad39ff1 |
476 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
477 | append_elem(OP_LIST, $4, |
478 | newCVREF(0, scalar($1)))); } |
479 | |
891be019 |
480 | | subscripted '(' expr ')' /* $foo->{bar}->(@args) */ |
fad39ff1 |
481 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
482 | append_elem(OP_LIST, $3, |
483 | newCVREF(0, scalar($1)))); } |
891be019 |
484 | | subscripted '(' ')' /* $foo->{bar}->() */ |
fad39ff1 |
485 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
486 | newCVREF(0, scalar($1))); } |
891be019 |
487 | ; |
fad39ff1 |
488 | |
891be019 |
489 | /* Binary operators between terms */ |
490 | termbinop : term ASSIGNOP term /* $x = $y */ |
a0d0e21e |
491 | { $$ = newASSIGNOP(OPf_STACKED, $1, $2, $3); } |
891be019 |
492 | | term POWOP term /* $x ** $y */ |
79072805 |
493 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 |
494 | | term MULOP term /* $x * $y, $x x $y */ |
79072805 |
495 | { if ($2 != OP_REPEAT) |
496 | scalar($1); |
497 | $$ = newBINOP($2, 0, $1, scalar($3)); } |
891be019 |
498 | | term ADDOP term /* $x + $y */ |
79072805 |
499 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 |
500 | | term SHIFTOP term /* $x >> $y, $x << $y */ |
79072805 |
501 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 |
502 | | term RELOP term /* $x > $y, etc. */ |
79072805 |
503 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 |
504 | | term EQOP term /* $x == $y, $x eq $y */ |
79072805 |
505 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 |
506 | | term BITANDOP term /* $x & $y */ |
79072805 |
507 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 |
508 | | term BITOROP term /* $x | $y */ |
79072805 |
509 | { $$ = newBINOP($2, 0, scalar($1), scalar($3)); } |
891be019 |
510 | | term DOTDOT term /* $x..$y, $x...$y */ |
79072805 |
511 | { $$ = newRANGE($2, scalar($1), scalar($3));} |
891be019 |
512 | | term ANDAND term /* $x && $y */ |
463ee0b2 |
513 | { $$ = newLOGOP(OP_AND, 0, $1, $3); } |
891be019 |
514 | | term OROR term /* $x || $y */ |
463ee0b2 |
515 | { $$ = newLOGOP(OP_OR, 0, $1, $3); } |
c963b151 |
516 | | term DORDOR term /* $x // $y */ |
517 | { $$ = newLOGOP(OP_DOR, 0, $1, $3); } |
891be019 |
518 | | term MATCHOP term /* $x =~ /$y/ */ |
79072805 |
519 | { $$ = bind_match($2, $1, $3); } |
891be019 |
520 | ; |
8d063cd8 |
521 | |
891be019 |
522 | /* Unary operators and terms */ |
523 | termunop : '-' term %prec UMINUS /* -$x */ |
79072805 |
524 | { $$ = newUNOP(OP_NEGATE, 0, scalar($2)); } |
891be019 |
525 | | '+' term %prec UMINUS /* +$x */ |
a687059c |
526 | { $$ = $2; } |
891be019 |
527 | | '!' term /* !$x */ |
79072805 |
528 | { $$ = newUNOP(OP_NOT, 0, scalar($2)); } |
891be019 |
529 | | '~' term /* ~$x */ |
79072805 |
530 | { $$ = newUNOP(OP_COMPLEMENT, 0, scalar($2));} |
891be019 |
531 | | term POSTINC /* $x++ */ |
79072805 |
532 | { $$ = newUNOP(OP_POSTINC, 0, |
463ee0b2 |
533 | mod(scalar($1), OP_POSTINC)); } |
891be019 |
534 | | term POSTDEC /* $x-- */ |
79072805 |
535 | { $$ = newUNOP(OP_POSTDEC, 0, |
463ee0b2 |
536 | mod(scalar($1), OP_POSTDEC)); } |
891be019 |
537 | | PREINC term /* ++$x */ |
79072805 |
538 | { $$ = newUNOP(OP_PREINC, 0, |
463ee0b2 |
539 | mod(scalar($2), OP_PREINC)); } |
891be019 |
540 | | PREDEC term /* --$x */ |
79072805 |
541 | { $$ = newUNOP(OP_PREDEC, 0, |
463ee0b2 |
542 | mod(scalar($2), OP_PREDEC)); } |
891be019 |
543 | |
544 | ; |
545 | |
546 | /* Constructors for anonymous data */ |
547 | anonymous: '[' expr ']' |
548 | { $$ = newANONLIST($2); } |
549 | | '[' ']' |
550 | { $$ = newANONLIST(Nullop); } |
551 | | HASHBRACK expr ';' '}' %prec '(' /* { foo => "Bar" } */ |
ecb2f335 |
552 | { $$ = newANONHASH($2); } |
891be019 |
553 | | HASHBRACK ';' '}' %prec '(' /* { } (';' by tokener) */ |
554 | { $$ = newANONHASH(Nullop); } |
555 | | ANONSUB startanonsub proto subattrlist block %prec '(' |
556 | { $$ = newANONATTRSUB($2, $3, $4, $5); } |
557 | |
558 | ; |
559 | |
560 | /* Things called with "do" */ |
561 | termdo : DO term %prec UNIOP /* do $filename */ |
562 | { $$ = dofile($2); } |
563 | | DO block %prec '(' /* do { code */ |
564 | { $$ = newUNOP(OP_NULL, OPf_SPECIAL, scope($2)); } |
565 | | DO WORD '(' ')' /* do somesub() */ |
566 | { $$ = newUNOP(OP_ENTERSUB, |
567 | OPf_SPECIAL|OPf_STACKED, |
568 | prepend_elem(OP_LIST, |
569 | scalar(newCVREF( |
570 | (OPpENTERSUB_AMPER<<8), |
571 | scalar($2) |
572 | )),Nullop)); dep();} |
573 | | DO WORD '(' expr ')' /* do somesub(@args) */ |
574 | { $$ = newUNOP(OP_ENTERSUB, |
575 | OPf_SPECIAL|OPf_STACKED, |
576 | append_elem(OP_LIST, |
577 | $4, |
578 | scalar(newCVREF( |
579 | (OPpENTERSUB_AMPER<<8), |
580 | scalar($2) |
581 | )))); dep();} |
582 | | DO scalar '(' ')' /* do $subref () */ |
583 | { $$ = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED, |
584 | prepend_elem(OP_LIST, |
585 | scalar(newCVREF(0,scalar($2))), Nullop)); dep();} |
586 | | DO scalar '(' expr ')' /* do $subref (@args) */ |
587 | { $$ = newUNOP(OP_ENTERSUB, OPf_SPECIAL|OPf_STACKED, |
588 | prepend_elem(OP_LIST, |
589 | $4, |
590 | scalar(newCVREF(0,scalar($2))))); dep();} |
591 | |
592 | ; |
593 | |
594 | term : termbinop |
595 | | termunop |
596 | | anonymous |
597 | | termdo |
e9bdcc27 |
598 | | term '?' term ':' term |
891be019 |
599 | { $$ = newCONDOP(0, $1, $3, $5); } |
600 | | REFGEN term /* \$x, \@y, \%z */ |
601 | { $$ = newUNOP(OP_REFGEN, 0, mod($2,OP_REFGEN)); } |
09bef843 |
602 | | myattrterm %prec UNIOP |
603 | { $$ = $1; } |
604 | | LOCAL term %prec UNIOP |
93a17b20 |
605 | { $$ = localize($2,$1); } |
a0d0e21e |
606 | | '(' expr ')' |
79072805 |
607 | { $$ = sawparens($2); } |
8d063cd8 |
608 | | '(' ')' |
8990e307 |
609 | { $$ = sawparens(newNULLLIST()); } |
79072805 |
610 | | scalar %prec '(' |
8d063cd8 |
611 | { $$ = $1; } |
79072805 |
612 | | star %prec '(' |
8d063cd8 |
613 | { $$ = $1; } |
79072805 |
614 | | hsh %prec '(' |
8d063cd8 |
615 | { $$ = $1; } |
79072805 |
616 | | ary %prec '(' |
8d063cd8 |
617 | { $$ = $1; } |
891be019 |
618 | | arylen %prec '(' /* $#x, $#{ something } */ |
79072805 |
619 | { $$ = newUNOP(OP_AV2ARYLEN, 0, ref($1, OP_AV2ARYLEN));} |
fad39ff1 |
620 | | subscripted |
621 | { $$ = $1; } |
891be019 |
622 | | '(' expr ')' '[' expr ']' /* list slice */ |
79072805 |
623 | { $$ = newSLICEOP(0, $5, $2); } |
891be019 |
624 | | '(' ')' '[' expr ']' /* empty list slice! */ |
79072805 |
625 | { $$ = newSLICEOP(0, $4, Nullop); } |
891be019 |
626 | | ary '[' expr ']' /* array slice */ |
79072805 |
627 | { $$ = prepend_elem(OP_ASLICE, |
628 | newOP(OP_PUSHMARK, 0), |
79072805 |
629 | newLISTOP(OP_ASLICE, 0, |
630 | list($3), |
a0d0e21e |
631 | ref($1, OP_ASLICE))); } |
891be019 |
632 | | ary '{' expr ';' '}' /* @hash{@keys} */ |
79072805 |
633 | { $$ = prepend_elem(OP_HSLICE, |
634 | newOP(OP_PUSHMARK, 0), |
79072805 |
635 | newLISTOP(OP_HSLICE, 0, |
636 | list($3), |
a0d0e21e |
637 | ref(oopsHV($1), OP_HSLICE))); |
3280af22 |
638 | PL_expect = XOPERATOR; } |
79072805 |
639 | | THING %prec '(' |
640 | { $$ = $1; } |
891be019 |
641 | | amper /* &foo; */ |
c07a80fd |
642 | { $$ = newUNOP(OP_ENTERSUB, 0, scalar($1)); } |
ecb2f335 |
643 | | amper '(' ')' /* &foo() */ |
a0d0e21e |
644 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, scalar($1)); } |
891be019 |
645 | | amper '(' expr ')' /* &foo(@args) */ |
a0d0e21e |
646 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
4633a7c4 |
647 | append_elem(OP_LIST, $3, scalar($1))); } |
891be019 |
648 | | NOAMP WORD listexpr /* foo(@args) */ |
a0d0e21e |
649 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
a5f75d66 |
650 | append_elem(OP_LIST, $3, scalar($2))); } |
891be019 |
651 | | LOOPEX /* loop exiting command (goto, last, dump, etc) */ |
85e6fe83 |
652 | { $$ = newOP($1, OPf_SPECIAL); |
3280af22 |
653 | PL_hints |= HINT_BLOCK_SCOPE; } |
a0d0e21e |
654 | | LOOPEX term |
8990e307 |
655 | { $$ = newLOOPEX($1,$2); } |
891be019 |
656 | | NOTOP argexpr /* not $foo */ |
c07a80fd |
657 | { $$ = newUNOP(OP_NOT, 0, scalar($2)); } |
891be019 |
658 | | UNIOP /* Unary op, $_ implied */ |
79072805 |
659 | { $$ = newOP($1, 0); } |
30173ab5 |
660 | | UNIOP block /* eval { foo } */ |
79072805 |
661 | { $$ = newUNOP($1, 0, $2); } |
891be019 |
662 | | UNIOP term /* Unary op */ |
79072805 |
663 | { $$ = newUNOP($1, 0, $2); } |
891be019 |
664 | | UNIOPSUB term /* Sub treated as unop */ |
4633a7c4 |
665 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
666 | append_elem(OP_LIST, $2, scalar($1))); } |
891be019 |
667 | | FUNC0 /* Nullary operator */ |
79072805 |
668 | { $$ = newOP($1, 0); } |
ae986130 |
669 | | FUNC0 '(' ')' |
79072805 |
670 | { $$ = newOP($1, 0); } |
891be019 |
671 | | FUNC0SUB /* Sub treated as nullop */ |
28757baa |
672 | { $$ = newUNOP(OP_ENTERSUB, OPf_STACKED, |
4633a7c4 |
673 | scalar($1)); } |
891be019 |
674 | | FUNC1 '(' ')' /* not () */ |
79072805 |
675 | { $$ = newOP($1, OPf_SPECIAL); } |
891be019 |
676 | | FUNC1 '(' expr ')' /* not($foo) */ |
79072805 |
677 | { $$ = newUNOP($1, 0, $3); } |
131b3ad0 |
678 | | PMFUNC '(' argexpr ')' /* m//, s///, tr/// */ |
679 | { $$ = pmruntime($1, $3, 1); } |
79072805 |
680 | | WORD |
378cc40b |
681 | | listop |
8d063cd8 |
682 | ; |
683 | |
891be019 |
684 | /* "my" declarations, with optional attributes */ |
09bef843 |
685 | myattrterm: MY myterm myattrlist |
686 | { $$ = my_attrs($2,$3); } |
687 | | MY myterm |
688 | { $$ = localize($2,$1); } |
689 | ; |
690 | |
891be019 |
691 | /* Things that can be "my"'d */ |
09bef843 |
692 | myterm : '(' expr ')' |
693 | { $$ = sawparens($2); } |
694 | | '(' ')' |
695 | { $$ = sawparens(newNULLLIST()); } |
696 | | scalar %prec '(' |
697 | { $$ = $1; } |
698 | | hsh %prec '(' |
699 | { $$ = $1; } |
700 | | ary %prec '(' |
701 | { $$ = $1; } |
702 | ; |
703 | |
891be019 |
704 | /* Basic list expressions */ |
fad39ff1 |
705 | listexpr: /* NULL */ %prec PREC_LOW |
8990e307 |
706 | { $$ = Nullop; } |
fad39ff1 |
707 | | argexpr %prec PREC_LOW |
a0d0e21e |
708 | { $$ = $1; } |
709 | ; |
710 | |
711 | listexprcom: /* NULL */ |
712 | { $$ = Nullop; } |
79072805 |
713 | | expr |
714 | { $$ = $1; } |
a0d0e21e |
715 | | expr ',' |
716 | { $$ = $1; } |
79072805 |
717 | ; |
718 | |
891be019 |
719 | /* A little bit of trickery to make "for my $foo (@bar)" actually be |
720 | lexical */ |
55497cff |
721 | my_scalar: scalar |
3280af22 |
722 | { PL_in_my = 0; $$ = my($1); } |
55497cff |
723 | ; |
724 | |
79072805 |
725 | amper : '&' indirob |
c07a80fd |
726 | { $$ = newCVREF($1,$2); } |
a687059c |
727 | ; |
728 | |
79072805 |
729 | scalar : '$' indirob |
730 | { $$ = newSVREF($2); } |
a687059c |
731 | ; |
732 | |
79072805 |
733 | ary : '@' indirob |
734 | { $$ = newAVREF($2); } |
735 | ; |
736 | |
737 | hsh : '%' indirob |
738 | { $$ = newHVREF($2); } |
739 | ; |
740 | |
741 | arylen : DOLSHARP indirob |
742 | { $$ = newAVREF($2); } |
743 | ; |
744 | |
745 | star : '*' indirob |
a0d0e21e |
746 | { $$ = newGVREF(0,$2); } |
79072805 |
747 | ; |
748 | |
891be019 |
749 | /* Indirect objects */ |
79072805 |
750 | indirob : WORD |
751 | { $$ = scalar($1); } |
fad39ff1 |
752 | | scalar %prec PREC_LOW |
463ee0b2 |
753 | { $$ = scalar($1); } |
79072805 |
754 | | block |
a0d0e21e |
755 | { $$ = scope($1); } |
79072805 |
756 | |
93a17b20 |
757 | | PRIVATEREF |
758 | { $$ = $1; } |
8d063cd8 |
759 | ; |