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parse Switch stmt

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z7zmey 2017-11-28 22:36:21 +02:00
parent f4f82a371f
commit 3e5af9828a
2 changed files with 921 additions and 817 deletions
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1700
parser.go
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38
parser.y
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@ -206,6 +206,8 @@ func (n node) attribute(key string, value string) node {
%type <node> for_exprs
%type <node> non_empty_for_exprs
%type <node> for_statement
%type <node> switch_case_list
%type <node> case_list
%%
@ -277,8 +279,8 @@ 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").
@ -287,6 +289,7 @@ statement:
append(Node("expr3").append($7)).
append(Node("stmt").append($9))
}
| T_SWITCH '(' expr ')' switch_case_list { $$ = Node("Switch").append(Node("expr").append($3)).append($5); }
| expr ';' { $$ = $1; }
if_stmt_without_else:
@ -341,6 +344,30 @@ non_empty_for_exprs:
| expr { $$ = Node("ExpressionList").append($1) }
;
switch_case_list:
'{' case_list '}' { $$ = $2; }
| '{' ';' case_list '}' { $$ = $3; }
| ':' case_list T_ENDSWITCH ';' { $$ = $2; }
| ':' ';' case_list T_ENDSWITCH ';' { $$ = $3; }
;
case_list:
/* empty */ { $$ = Node("CaseList") }
| case_list T_CASE expr case_separator inner_statement_list
{
$$ = $1.append(Node("Case").append(Node("expr").append($3)).append(Node("stmt").append($5)))
}
| case_list T_DEFAULT case_separator inner_statement_list
{
$$ = $1.append(Node("Default").append(Node("stmt").append($4)))
}
;
case_separator:
':'
| ';'
;
for_statement:
statement { $$ = $1; }
| ':' inner_statement_list T_ENDFOR ';' { $$ = $2; }
@ -539,9 +566,10 @@ simple_variable:
const src = `<?
for ($a = $b;;) :
endfor;
switch($a) :;
case $b; $b = $a;
default; $a;
endswitch;
`