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parse Foreach stmt

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vadim 2017-11-29 12:24:08 +02:00
parent 7863670c5c
commit 5344a3d617
2 changed files with 1260 additions and 989 deletions
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2157
parser.go
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88
parser.y
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@ -217,6 +217,12 @@ func (n node) attribute(key string, value string) node {
%type <node> echo_expr
%type <node> unset_variables
%type <node> unset_variable
%type <node> foreach_variable
%type <node> array_pair_list
%type <node> possible_array_pair
%type <node> non_empty_array_pair_list
%type <node> array_pair
%type <node> foreach_statement
%%
@ -288,8 +294,18 @@ statement:
'{' inner_statement_list '}' { $$ = $2; }
| if_stmt { $$ = $1; }
| alt_if_stmt { $$ = $1; }
| T_WHILE '(' expr ')' while_statement { $$ = Node("While").append(Node("expr").append($3)).append(Node("stmt").append($5)); }
| T_DO statement T_WHILE '(' expr ')' ';' { $$ = Node("DoWhile").append(Node("expr").append($5)).append(Node("stmt").append($2)); }
| T_WHILE '(' expr ')' while_statement
{
$$ = Node("While").
append(Node("expr").append($3)).
append(Node("stmt").append($5));
}
| T_DO statement T_WHILE '(' expr ')' ';'
{
$$ = Node("DoWhile").
append(Node("expr").append($5)).
append(Node("stmt").append($2));
}
| T_FOR '(' for_exprs ';' for_exprs ';' for_exprs ')' for_statement
{
$$ = Node("For").
@ -308,10 +324,22 @@ statement:
| T_INLINE_HTML { $$ = Node("Echo").append(Node("InlineHtml").attribute("value", $1)) }
| expr ';' { $$ = $1; }
| T_UNSET '(' unset_variables possible_comma ')' ';'
{ $$ = Node("Unset").append($3); }
| T_FOREACH '(' expr T_AS foreach_variable ')' foreach_statement
{
$$ = Node("Unset").append($3);
$$ = Node("Foreach").
append(Node("expr").append($3)).
append(Node("ForeachVariable").append($5)).
append($7);
}
| T_FOREACH '(' expr T_AS foreach_variable T_DOUBLE_ARROW foreach_variable ')' foreach_statement
{
$$ = Node("Foreach").
append(Node("expr").append($3)).
append(Node("ForeachKey").append($5)).
append(Node("ForeachVariable").append($7)).
append($9);
}
if_stmt_without_else:
T_IF '(' expr ')' statement
@ -394,6 +422,51 @@ for_statement:
| ':' inner_statement_list T_ENDFOR ';' { $$ = $2; }
;
foreach_variable:
variable { $$ = $1; }
| '&' variable { $$ = Node("Ref").append($2); }
| T_LIST '(' array_pair_list ')' { $$ = Node("List").append($3) }
| '[' array_pair_list ']' { $$ = Node("ShortList").append($2) }
;
array_pair_list:
non_empty_array_pair_list { /* TODO: allow single trailing comma */ $$ = $1 }
;
possible_array_pair:
/* empty */ { $$ = Node("Null"); }
| array_pair { $$ = $1; }
;
non_empty_array_pair_list:
non_empty_array_pair_list ',' possible_array_pair
{ $$ = $1.append($3) }
| possible_array_pair { $$ = Node("ArrayPairList").append($1) }
;
array_pair:
expr T_DOUBLE_ARROW expr { $$ = Node("ArrayElement").append($1).append($3) }
| expr { $$ = Node("ArrayElement").append($1) }
| expr T_DOUBLE_ARROW '&' variable { $$ = Node("ArrayElement").append($1).append(Node("Ref").append($4)) }
| '&' variable { $$ = Node("ArrayElement").append(Node("Ref").append($2)) }
| expr T_DOUBLE_ARROW T_LIST '(' array_pair_list ')'
{
$$ = Node("ArrayElement").
append($1).
append(Node("ArrayList").append($5))
}
| T_LIST '(' array_pair_list ')'
{
$$ = Node("ArrayElement").
append(Node("ArrayList").append($3))
}
;
foreach_statement:
statement { $$ = $1; }
| ':' inner_statement_list T_ENDFOREACH ';' { $$ = $2; }
;
global_var_list:
global_var_list ',' global_var { $$ = $1.append($3); }
| global_var { $$ = Node("GlobalVarList").append($1); }
@ -632,11 +705,12 @@ simple_variable:
%%
const src = `a<?
const src = `<?php
unset($a, $b, );
foreach ($a = $b as $k => list($a, $b => $c,)) :
echo $b;
endforeach;
?> test
`
func main() {