/*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
/** Remove all embedded actions from a production by factoring them
* out into individual action production using new non terminals.
* if the original production was: <pre>
* A ::= B {action1} C {action2} D
* </pre>
* then it will be factored into: <pre>
* A ::= B NT$1 C NT$2 D
* NT$1 ::= {action1}
* NT$2 ::= {action2}
* </pre>
* where NT$1 and NT$2 are new system created non terminals.
*/
/* the declarations added to the parent production are also passed along,
* as they should be perfectly valid in this code string, since it
* was originally a code string in the parent, not on its own.
* frank 6/20/96 */
protected void remove_embedded_actions(
)
{
non_terminal new_nt;
production new_prod;
string declare_str;
/* walk over the production and process each action */
for (int act_loc = 0; act_loc < rhs_length(); act_loc++)
{
if (rhs(act_loc).is_action())
{
declare_str = declare_labels(
_rhs, act_loc, "");
/* create a new non terminal for the action production */
new_nt = non_terminal.create_new();
new_nt.is_embedded_action = true; /* 24-Mar-1998, CSA */
/* create a new production with just the action */
new_prod = new action_production(this, new_nt, null, 0,
declare_str + ((action_part)rhs(act_loc)).code_string());
/* replace the action with the generated non terminal */
_rhs[act_loc] = new symbol_part(new_nt);
}
}
}
/*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*/
/** Remove all embedded actions from a production by factoring them
* out into individual action production using new non terminals.
* if the original production was: <pre>
* A ::= B {action1} C {action2} D
* </pre>
* then it will be factored into: <pre>
* A ::= B NT$1 C NT$2 D
* NT$1 ::= {action1}
* NT$2 ::= {action2}
* </pre>
* where NT$1 and NT$2 are new system created non terminals.
*/
/* the declarations added to the parent production are also passed along,
as they should be perfectly valid in this code string, since it
was originally a code string in the parent, not on its own.
frank 6/20/96 */
protected void remove_embedded_actions(
)
{
non_terminal new_nt;
production new_prod;
string declare_str;
/* walk over the production and process each action */
for (int act_loc = 0; act_loc < rhs_length(); act_loc++)
if (rhs(act_loc).is_action())
{
declare_str = declare_labels(
_rhs, act_loc, "");
/* create a new non terminal for the action production */
new_nt = non_terminal.create_new();
new_nt.is_embedded_action = true; /* 24-Mar-1998, CSA */
/* create a new production with just the action */
new_prod = new action_production(this, new_nt, null, 0,
declare_str + ((action_part)rhs(act_loc)).code_string());
/* replace the action with the generated non terminal */
_rhs[act_loc] = new symbol_part(new_nt);
}
}
