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Remove d_initial from the parser as it is unused (GH-12212)

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d_initial, the first state of a particular DFA in the parser has always been initialized to 0 in the old pgen as well as the new pgen. As this value is not used and the first state of each DFA is assumed to be the first element in the array representing it, remove d_initial from the parser to reduce complexity.
This commit is contained in:
tyomitch 2019-03-09 17:35:50 +02:00 committed by Pablo Galindo
parent d70a359adf
commit 1b304f992d
4 changed files with 94 additions and 95 deletions
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1
Include/grammar.h
View file

@ -50,7 +50,6 @@ typedef struct {
typedef struct {
int d_type; /* Non-terminal this represents */
char *d_name; /* For printing */
int d_initial; /* Initial state */
int d_nstates;
state *d_state; /* Array of states */
bitset d_first;

2
Modules/parsermodule.c
View file

@ -662,7 +662,7 @@ validate_node(node *tree)
REQ(tree, nt_dfa->d_type);
/* Run the DFA for this nonterminal. */
dfa_state = &nt_dfa->d_state[nt_dfa->d_initial];
dfa_state = nt_dfa->d_state;
for (pos = 0; pos < nch; ++pos) {
node *ch = CHILD(tree, pos);
int ch_type = TYPE(ch);

2
Parser/pgen/grammar.py
View file

@ -97,7 +97,7 @@ def print_dfas(self, writer):
' {{{dfa_symbol}, "{symbol_name}", '.format(
dfa_symbol=symbol, symbol_name=self.number2symbol[symbol]
)
+ "0, {n_states}, states_{dfa_index},\n".format(
+ "{n_states}, states_{dfa_index},\n".format(
n_states=len(dfa), dfa_index=dfaindex
)
+ ' "'

184
Python/graminit.c
View file

@ -2110,189 +2110,189 @@ static state states_91[11] = {
{2, arcs_91_10},
};
static dfa dfas[92] = {
{256, "single_input", 0, 3, states_0,
{256, "single_input", 3, states_0,
"\344\377\377\377\377\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{257, "file_input", 0, 2, states_1,
{257, "file_input", 2, states_1,
"\344\377\377\377\377\027\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{258, "eval_input", 0, 3, states_2,
{258, "eval_input", 3, states_2,
"\240\173\000\024\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{259, "decorator", 0, 7, states_3,
{259, "decorator", 7, states_3,
"\000\004\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{260, "decorators", 0, 2, states_4,
{260, "decorators", 2, states_4,
"\000\004\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{261, "decorated", 0, 3, states_5,
{261, "decorated", 3, states_5,
"\000\004\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{262, "async_funcdef", 0, 3, states_6,
{262, "async_funcdef", 3, states_6,
"\000\000\000\000\100\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{263, "funcdef", 0, 9, states_7,
{263, "funcdef", 9, states_7,
"\000\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{264, "parameters", 0, 4, states_8,
{264, "parameters", 4, states_8,
"\040\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{265, "typedargslist", 0, 22, states_9,
{265, "typedargslist", 22, states_9,
"\100\000\000\000\000\001\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{266, "tfpdef", 0, 4, states_10,
{266, "tfpdef", 4, states_10,
"\000\000\000\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{267, "varargslist", 0, 18, states_11,
{267, "varargslist", 18, states_11,
"\100\000\000\000\000\001\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{268, "vfpdef", 0, 2, states_12,
{268, "vfpdef", 2, states_12,
"\000\000\000\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{269, "stmt", 0, 2, states_13,
{269, "stmt", 2, states_13,
"\340\377\377\377\377\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{270, "simple_stmt", 0, 4, states_14,
{270, "simple_stmt", 4, states_14,
"\340\373\325\376\270\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{271, "small_stmt", 0, 2, states_15,
{271, "small_stmt", 2, states_15,
"\340\373\325\376\270\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{272, "expr_stmt", 0, 6, states_16,
{272, "expr_stmt", 6, states_16,
"\340\173\000\024\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{273, "annassign", 0, 5, states_17,
{273, "annassign", 5, states_17,
"\000\000\000\000\000\000\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{274, "testlist_star_expr", 0, 3, states_18,
{274, "testlist_star_expr", 3, states_18,
"\340\173\000\024\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{275, "augassign", 0, 2, states_19,
{275, "augassign", 2, states_19,
"\000\000\000\000\000\000\000\000\000\000\340\377\003\000\000\000\000\000\000\000\000\000\000"},
{276, "del_stmt", 0, 3, states_20,
{276, "del_stmt", 3, states_20,
"\000\000\020\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{277, "pass_stmt", 0, 2, states_21,
{277, "pass_stmt", 2, states_21,
"\000\000\000\040\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{278, "flow_stmt", 0, 2, states_22,
{278, "flow_stmt", 2, states_22,
"\000\000\005\300\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{279, "break_stmt", 0, 2, states_23,
{279, "break_stmt", 2, states_23,
"\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{280, "continue_stmt", 0, 2, states_24,
{280, "continue_stmt", 2, states_24,
"\000\000\004\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{281, "return_stmt", 0, 3, states_25,
{281, "return_stmt", 3, states_25,
"\000\000\000\200\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{282, "yield_stmt", 0, 2, states_26,
{282, "yield_stmt", 2, states_26,
"\000\000\000\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{283, "raise_stmt", 0, 5, states_27,
{283, "raise_stmt", 5, states_27,
"\000\000\000\100\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{284, "import_stmt", 0, 2, states_28,
{284, "import_stmt", 2, states_28,
"\000\000\100\002\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{285, "import_name", 0, 3, states_29,
{285, "import_name", 3, states_29,
"\000\000\000\002\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{286, "import_from", 0, 8, states_30,
{286, "import_from", 8, states_30,
"\000\000\100\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{287, "import_as_name", 0, 4, states_31,
{287, "import_as_name", 4, states_31,
"\000\000\000\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{288, "dotted_as_name", 0, 4, states_32,
{288, "dotted_as_name", 4, states_32,
"\000\000\000\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{289, "import_as_names", 0, 3, states_33,
{289, "import_as_names", 3, states_33,
"\000\000\000\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{290, "dotted_as_names", 0, 2, states_34,
{290, "dotted_as_names", 2, states_34,
"\000\000\000\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{291, "dotted_name", 0, 2, states_35,
{291, "dotted_name", 2, states_35,
"\000\000\000\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{292, "global_stmt", 0, 3, states_36,
{292, "global_stmt", 3, states_36,
"\000\000\200\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{293, "nonlocal_stmt", 0, 3, states_37,
{293, "nonlocal_stmt", 3, states_37,
"\000\000\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{294, "assert_stmt", 0, 5, states_38,
{294, "assert_stmt", 5, states_38,
"\000\200\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{295, "compound_stmt", 0, 2, states_39,
{295, "compound_stmt", 2, states_39,
"\000\004\052\001\107\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{296, "async_stmt", 0, 3, states_40,
{296, "async_stmt", 3, states_40,
"\000\000\000\000\100\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{297, "if_stmt", 0, 8, states_41,
{297, "if_stmt", 8, states_41,
"\000\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{298, "while_stmt", 0, 8, states_42,
{298, "while_stmt", 8, states_42,
"\000\000\000\000\002\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{299, "for_stmt", 0, 11, states_43,
{299, "for_stmt", 11, states_43,
"\000\000\040\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{300, "try_stmt", 0, 13, states_44,
{300, "try_stmt", 13, states_44,
"\000\000\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{301, "with_stmt", 0, 6, states_45,
{301, "with_stmt", 6, states_45,
"\000\000\000\000\004\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{302, "with_item", 0, 4, states_46,
{302, "with_item", 4, states_46,
"\240\173\000\024\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{303, "except_clause", 0, 5, states_47,
{303, "except_clause", 5, states_47,
"\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\200\000\000\000\000\000\000\000"},
{304, "suite", 0, 5, states_48,
{304, "suite", 5, states_48,
"\344\373\325\376\270\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{305, "namedexpr_test", 0, 4, states_49,
{305, "namedexpr_test", 4, states_49,
"\240\173\000\024\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{306, "test", 0, 6, states_50,
{306, "test", 6, states_50,
"\240\173\000\024\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{307, "test_nocond", 0, 2, states_51,
{307, "test_nocond", 2, states_51,
"\240\173\000\024\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{308, "lambdef", 0, 5, states_52,
{308, "lambdef", 5, states_52,
"\000\000\000\004\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{309, "lambdef_nocond", 0, 5, states_53,
{309, "lambdef_nocond", 5, states_53,
"\000\000\000\004\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{310, "or_test", 0, 2, states_54,
{310, "or_test", 2, states_54,
"\240\173\000\020\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{311, "and_test", 0, 2, states_55,
{311, "and_test", 2, states_55,
"\240\173\000\020\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{312, "not_test", 0, 3, states_56,
{312, "not_test", 3, states_56,
"\240\173\000\020\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{313, "comparison", 0, 2, states_57,
{313, "comparison", 2, states_57,
"\240\173\000\000\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{314, "comp_op", 0, 4, states_58,
{314, "comp_op", 4, states_58,
"\000\000\000\020\000\000\000\000\000\000\000\000\000\000\000\004\000\340\017\000\000\000\000"},
{315, "star_expr", 0, 3, states_59,
{315, "star_expr", 3, states_59,
"\100\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{316, "expr", 0, 2, states_60,
{316, "expr", 2, states_60,
"\240\173\000\000\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{317, "xor_expr", 0, 2, states_61,
{317, "xor_expr", 2, states_61,
"\240\173\000\000\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{318, "and_expr", 0, 2, states_62,
{318, "and_expr", 2, states_62,
"\240\173\000\000\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{319, "shift_expr", 0, 2, states_63,
{319, "shift_expr", 2, states_63,
"\240\173\000\000\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{320, "arith_expr", 0, 2, states_64,
{320, "arith_expr", 2, states_64,
"\240\173\000\000\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{321, "term", 0, 2, states_65,
{321, "term", 2, states_65,
"\240\173\000\000\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{322, "factor", 0, 3, states_66,
{322, "factor", 3, states_66,
"\240\173\000\000\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{323, "power", 0, 4, states_67,
{323, "power", 4, states_67,
"\040\172\000\000\220\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{324, "atom_expr", 0, 3, states_68,
{324, "atom_expr", 3, states_68,
"\040\172\000\000\220\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{325, "atom", 0, 9, states_69,
{325, "atom", 9, states_69,
"\040\172\000\000\020\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{326, "testlist_comp", 0, 5, states_70,
{326, "testlist_comp", 5, states_70,
"\340\173\000\024\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{327, "trailer", 0, 7, states_71,
{327, "trailer", 7, states_71,
"\040\100\000\000\000\000\000\000\000\000\000\000\000\010\000\000\000\000\000\000\000\000\000"},
{328, "subscriptlist", 0, 3, states_72,
{328, "subscriptlist", 3, states_72,
"\240\173\000\024\260\007\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{329, "subscript", 0, 5, states_73,
{329, "subscript", 5, states_73,
"\240\173\000\024\260\007\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{330, "sliceop", 0, 3, states_74,
{330, "sliceop", 3, states_74,
"\000\000\000\000\000\000\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{331, "exprlist", 0, 3, states_75,
{331, "exprlist", 3, states_75,
"\340\173\000\000\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{332, "testlist", 0, 3, states_76,
{332, "testlist", 3, states_76,
"\240\173\000\024\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{333, "dictorsetmaker", 0, 14, states_77,
{333, "dictorsetmaker", 14, states_77,
"\340\173\000\024\260\007\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{334, "classdef", 0, 8, states_78,
{334, "classdef", 8, states_78,
"\000\000\002\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{335, "arglist", 0, 3, states_79,
{335, "arglist", 3, states_79,
"\340\173\000\024\260\007\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{336, "argument", 0, 4, states_80,
{336, "argument", 4, states_80,
"\340\173\000\024\260\007\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{337, "comp_iter", 0, 2, states_81,
{337, "comp_iter", 2, states_81,
"\000\000\040\001\100\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{338, "sync_comp_for", 0, 6, states_82,
{338, "sync_comp_for", 6, states_82,
"\000\000\040\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{339, "comp_for", 0, 3, states_83,
{339, "comp_for", 3, states_83,
"\000\000\040\000\100\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{340, "comp_if", 0, 4, states_84,
{340, "comp_if", 4, states_84,
"\000\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{341, "encoding_decl", 0, 2, states_85,
{341, "encoding_decl", 2, states_85,
"\000\000\000\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{342, "yield_expr", 0, 3, states_86,
{342, "yield_expr", 3, states_86,
"\000\000\000\000\010\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{343, "yield_arg", 0, 3, states_87,
{343, "yield_arg", 3, states_87,
"\340\173\100\024\260\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{344, "func_body_suite", 0, 7, states_88,
{344, "func_body_suite", 7, states_88,
"\344\373\325\376\270\007\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{345, "func_type_input", 0, 3, states_89,
{345, "func_type_input", 3, states_89,
"\040\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{346, "func_type", 0, 6, states_90,
{346, "func_type", 6, states_90,
"\040\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
{347, "typelist", 0, 11, states_91,
{347, "typelist", 11, states_91,
"\340\173\000\024\260\007\000\000\001\000\000\000\000\000\000\000\000\000\000\000\000\000\000"},
};
static label labels[183] = {