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Store final parse result and give access with .result parser property

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This commit is contained in:
Josh Holtrop 2022-10-12 21:33:09 -04:00
parent 31970522de
commit 74beaf7ed8
1 changed files with 12 additions and 0 deletions
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12
assets/parser.d.erb
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@ -375,6 +375,8 @@ class <%= @classname %>
private Lexer m_lexer; private Lexer m_lexer;
private <%= @grammar.result_type %> parse_result;
this(const(ubyte) * input, size_t input_length) this(const(ubyte) * input, size_t input_length)
{ {
m_lexer = new Lexer(input, input_length); m_lexer = new Lexer(input, input_length);
@ -386,6 +388,7 @@ class <%= @classname %>
uint token = _TOKEN_COUNT; uint token = _TOKEN_COUNT;
StateResult[] states = new StateResult[](1); StateResult[] states = new StateResult[](1);
uint reduced_rule_set = 0xFFFFFFFFu; uint reduced_rule_set = 0xFFFFFFFFu;
<%= @grammar.result_type %> reduced_parse_result;
for (;;) for (;;)
{ {
if (token == _TOKEN_COUNT) if (token == _TOKEN_COUNT)
@ -407,6 +410,7 @@ class <%= @classname %>
if (token == TOKEN_0EOF) if (token == TOKEN_0EOF)
{ {
/* Successful parse. */ /* Successful parse. */
parse_result = states[$-1].result;
return true; return true;
} }
states ~= StateResult(shift_state); states ~= StateResult(shift_state);
@ -416,6 +420,9 @@ class <%= @classname %>
} }
else else
{ {
states[$-1].result = reduced_parse_result;
<%= @grammar.result_type %> new_parse_result;
reduced_parse_result = new_parse_result;
reduced_rule_set = 0xFFFFFFFFu; reduced_rule_set = 0xFFFFFFFFu;
} }
continue; continue;
@ -443,6 +450,11 @@ class <%= @classname %>
} }
} }
@property <%= @grammar.result_type %> result()
{
return parse_result;
}
private uint check_shift(uint state, uint symbol) private uint check_shift(uint state, uint symbol)
{ {
uint start = states[state].shift_table_index; uint start = states[state].shift_table_index;