fix: noconfirm auto-selects first AUR match
This commit is contained in:
@@ -0,0 +1,856 @@
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/* Bison Action Scanner -*- C -*-
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Copyright (C) 2006-2015, 2018-2021 Free Software Foundation, Inc.
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This file is part of Bison, the GNU Compiler Compiler.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
|
||||
the Free Software Foundation, either version 3 of the License, or
|
||||
(at your option) any later version.
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||||
|
||||
This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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||||
along with this program. If not, see <https://www.gnu.org/licenses/>. */
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%option debug nodefault noinput nounput noyywrap never-interactive
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%option prefix="code_" outfile="lex.yy.c"
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%{
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#include <c-ctype.h>
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#include <get-errno.h>
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#include <quote.h>
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#include "src/complain.h"
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#include "src/getargs.h"
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#include "src/muscle-tab.h"
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#include "src/reader.h"
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#include "src/scan-code.h"
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#include "src/symlist.h"
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#define FLEX_PREFIX(Id) code_ ## Id
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#include "src/flex-scanner.h"
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/* Work around a bug in flex 2.5.31. See Debian bug 333231
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<https://bugs.debian.org/333231>. */
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#undef code_wrap
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#define code_wrap() 1
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struct obstack *obstack_for_actions = &obstack_for_string;
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/* The current calling start condition: SC_RULE_ACTION or
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SC_SYMBOL_ACTION. */
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# define YY_DECL static char *code_lex (code_props *self, int sc_context)
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YY_DECL;
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#define YY_USER_ACTION location_compute (loc, &loc->end, yytext, yyleng);
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static char *fetch_type_name (char *cp, char const **type_name,
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const location *dollar_loc);
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static void handle_action_dollar (symbol_list *rule, char *cp,
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const location *dollar_loc);
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static void handle_action_at (symbol_list *rule, char *cp,
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const location *at_loc);
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/* A string to be pushed to obstack after dollar/at has been handled. */
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static char *ref_tail_fields;
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static location current_loc;
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static location *loc = ¤t_loc;
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/* A string representing the most recent translation. */
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static char *last_string;
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/* True if an untyped $$ or $n was seen. */
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static bool untyped_var_seen;
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%}
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/* C and C++ comments in code. */
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%x SC_COMMENT SC_LINE_COMMENT
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/* Strings and characters in code. */
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%x SC_STRING SC_CHARACTER
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/* Whether in a rule or symbol action. Specifies the translation
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of $ and @. */
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%x SC_RULE_ACTION SC_SYMBOL_ACTION
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/* POSIX says that a tag must be both an id and a C union member, but
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historically almost any character is allowed in a tag. We disallow
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NUL and newline, as this simplifies our implementation. We allow
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"->" as a means to dereference a pointer. */
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tag ([^\0\n>]|->)*[^-]
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/* Zero or more instances of backslash-newline. Following GCC, allow
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white space between the backslash and the newline. */
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splice (\\[ \f\t\v]*\n)*
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/* C style identifier. Must start with letter. Will be used for
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named symbol references. Shall be kept synchronized with
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scan-gram.l "letter" and "id". */
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letter [.abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_]
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id {letter}({letter}|[-0-9])*
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ref -?[0-9]+|{id}|"["{id}"]"|"$"
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%%
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%{
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/* This scanner is special: it is invoked only once, henceforth
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is expected to return only once. This initialization is
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therefore done once per action to translate. */
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aver (sc_context == SC_SYMBOL_ACTION
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|| sc_context == SC_RULE_ACTION
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|| sc_context == INITIAL);
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BEGIN sc_context;
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%}
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/*------------------------------------------------------------.
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| Scanning a C comment. The initial '/ *' is already eaten. |
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`------------------------------------------------------------*/
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<SC_COMMENT>
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{
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"*"{splice}"/" STRING_GROW (); BEGIN sc_context;
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}
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/*--------------------------------------------------------------.
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| Scanning a line comment. The initial '//' is already eaten. |
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`--------------------------------------------------------------*/
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<SC_LINE_COMMENT>
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{
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"\n" STRING_GROW (); BEGIN sc_context;
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{splice} STRING_GROW ();
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}
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/*--------------------------------------------.
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| Scanning user-code characters and strings. |
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`--------------------------------------------*/
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<SC_CHARACTER,SC_STRING>
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{
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{splice}|\\{splice}. STRING_GROW ();
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}
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<SC_CHARACTER>
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{
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"'" STRING_GROW (); BEGIN sc_context;
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}
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<SC_STRING>
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{
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"\"" STRING_GROW (); BEGIN sc_context;
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}
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<SC_RULE_ACTION,SC_SYMBOL_ACTION>
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{
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"'" STRING_GROW (); BEGIN SC_CHARACTER;
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"\"" STRING_GROW (); BEGIN SC_STRING;
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"/"{splice}"*" STRING_GROW (); BEGIN SC_COMMENT;
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"/"{splice}"/" STRING_GROW (); BEGIN SC_LINE_COMMENT;
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[$@] {
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complain (loc, Wother, _("stray '%s'"), yytext);
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obstack_escape (&obstack_for_string, yytext);
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}
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}
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<SC_RULE_ACTION>
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{
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"$"("<"{tag}">")?{ref} {
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ref_tail_fields = NULL;
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handle_action_dollar (self->rule, yytext, loc);
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if (ref_tail_fields)
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obstack_sgrow (&obstack_for_string, ref_tail_fields);
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}
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"@"{ref} {
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ref_tail_fields = NULL;
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handle_action_at (self->rule, yytext, loc);
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if (ref_tail_fields)
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obstack_sgrow (&obstack_for_string, ref_tail_fields);
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}
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}
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<SC_SYMBOL_ACTION>
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{
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"$"("<"{tag}">")?"$" {
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const char *type_name = NULL;
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fetch_type_name (yytext + 1, &type_name, loc)[-1] = 0;
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obstack_sgrow (&obstack_for_string, "]b4_dollar_dollar(");
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obstack_quote (&obstack_for_string, type_name);
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obstack_sgrow (&obstack_for_string, ")[");
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self->is_value_used = true;
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}
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"@$" {
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obstack_sgrow (&obstack_for_string, "]b4_at_dollar[");
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muscle_percent_define_ensure("locations", *loc, true);
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}
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}
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<*>
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{
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/* Escape M4 quoting characters in C code. */
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[$@\[\]] obstack_escape (&obstack_for_string, yytext);
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/* By default, grow the string obstack with the input. */
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.|\n STRING_GROW ();
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/* End of processing. */
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<<EOF>> STRING_FINISH (); return last_string;
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}
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%%
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static inline bool
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is_dot_or_dash (char ch)
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{
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return ch == '.' || ch == '-';
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}
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static inline bool
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contains_dot_or_dash (const char* p)
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{
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return !!strpbrk (p, ".-");
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}
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/* Defines a variant of a symbolic name resolution. */
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typedef struct
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{
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/* Index in symbol list. */
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int symbol_index;
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/* Matched symbol id and loc. */
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uniqstr id;
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location loc;
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/* Hiding named reference. */
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named_ref* hidden_by;
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/* Error flags. May contain zero (no errors) or
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a combination of VARIANT_* values. */
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unsigned err;
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} variant;
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/* Set when the variant refers to a symbol hidden
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by an explicit symbol reference. */
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#define VARIANT_HIDDEN (1 << 0)
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/* Set when the variant refers to a symbol containing
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dots or dashes. Will require explicit bracketing. */
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#define VARIANT_BAD_BRACKETING (1 << 1)
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/* Set when the variant refers to a symbol which is
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not visible from current midrule. */
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#define VARIANT_NOT_VISIBLE_FROM_MIDRULE (1 << 2)
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static variant *variant_table = NULL;
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static int variant_table_size = 0;
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static int variant_count = 0;
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static variant *
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variant_table_grow (void)
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{
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++variant_count;
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if (variant_count > variant_table_size)
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{
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while (variant_count > variant_table_size)
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variant_table_size = 2 * variant_table_size + 3;
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variant_table = xnrealloc (variant_table, variant_table_size,
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sizeof *variant_table);
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}
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return &variant_table[variant_count - 1];
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}
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static void
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variant_table_free (void)
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{
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free (variant_table);
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variant_table = NULL;
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variant_table_size = variant_count = 0;
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}
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static char const *
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find_prefix_end (char const *prefix, char const *cp, char const *end)
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{
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for (; *prefix && cp != end; ++prefix, ++cp)
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if (*prefix != *cp)
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return NULL;
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return *prefix ? NULL : cp;
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}
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static variant *
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variant_add (uniqstr id, location id_loc, int symbol_index,
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char const *cp, char const *cp_end, bool explicit_bracketing)
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{
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char const *prefix_end = find_prefix_end (id, cp, cp_end);
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if (prefix_end &&
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(prefix_end == cp_end ||
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(!explicit_bracketing && is_dot_or_dash (*prefix_end))))
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{
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variant *r = variant_table_grow ();
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r->symbol_index = symbol_index;
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r->id = id;
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r->loc = id_loc;
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r->hidden_by = NULL;
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r->err = 0;
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return r;
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}
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else
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return NULL;
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}
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static const char *
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get_at_spec(int symbol_index)
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{
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static char at_buf[20];
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if (symbol_index == 0)
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strcpy (at_buf, "$$");
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else
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snprintf (at_buf, sizeof at_buf, "$%u", symbol_index);
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return at_buf;
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}
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static void
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show_sub_message (warnings warning,
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const char* cp, bool explicit_bracketing,
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int midrule_rhs_index, char dollar_or_at,
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const variant *var)
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{
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const char *at_spec = get_at_spec (var->symbol_index);
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if (var->err == 0)
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subcomplain (&var->loc, warning,
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_("refers to: %c%s at %s"), dollar_or_at,
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var->id, at_spec);
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else
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{
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const char *id;
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location id_loc;
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if (var->hidden_by)
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{
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id = var->hidden_by->id;
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id_loc = var->hidden_by->loc;
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}
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else
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{
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id = var->id;
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id_loc = var->loc;
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}
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const char *tail = explicit_bracketing ? "" : cp + strlen (var->id);
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/* Create the explanation message. */
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static struct obstack msg_buf;
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obstack_init (&msg_buf);
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obstack_printf (&msg_buf, _("possibly meant: %c"), dollar_or_at);
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if (contains_dot_or_dash (id))
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obstack_printf (&msg_buf, "[%s]", id);
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else
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obstack_sgrow (&msg_buf, id);
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obstack_sgrow (&msg_buf, tail);
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if (var->err & VARIANT_HIDDEN)
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{
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obstack_printf (&msg_buf, _(", hiding %c"), dollar_or_at);
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if (contains_dot_or_dash (var->id))
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obstack_printf (&msg_buf, "[%s]", var->id);
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else
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obstack_sgrow (&msg_buf, var->id);
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obstack_sgrow (&msg_buf, tail);
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}
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obstack_printf (&msg_buf, _(" at %s"), at_spec);
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if (var->err & VARIANT_NOT_VISIBLE_FROM_MIDRULE)
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obstack_printf (&msg_buf,
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_(", cannot be accessed from midrule action at $%d"),
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midrule_rhs_index);
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subcomplain (&id_loc, warning, "%s",
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obstack_finish0 (&msg_buf));
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obstack_free (&msg_buf, 0);
|
||||
}
|
||||
}
|
||||
|
||||
static void
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show_sub_messages (warnings warning,
|
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const char* cp, bool explicit_bracketing,
|
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int midrule_rhs_index, char dollar_or_at)
|
||||
{
|
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for (int i = 0; i < variant_count; ++i)
|
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show_sub_message (warning | silent,
|
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cp, explicit_bracketing,
|
||||
midrule_rhs_index, dollar_or_at,
|
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&variant_table[i]);
|
||||
}
|
||||
|
||||
/* Returned from "parse_ref" when the reference
|
||||
is inappropriate. */
|
||||
#define INVALID_REF (INT_MIN)
|
||||
|
||||
/* Returned from "parse_ref" when the reference
|
||||
points to LHS ($$) of the current rule or midrule. */
|
||||
#define LHS_REF (INT_MIN + 1)
|
||||
|
||||
/* Parse a positional reference in RULE. */
|
||||
static long
|
||||
parse_positional_ref (char *cp, int rule_length,
|
||||
char *text, const location *text_loc)
|
||||
{
|
||||
long num = strtol (cp, &cp, 10);
|
||||
if (1 - INT_MAX + rule_length <= num && num <= rule_length)
|
||||
return num;
|
||||
else
|
||||
{
|
||||
complain (text_loc, complaint, _("integer out of range: %s"),
|
||||
quote (text));
|
||||
return INVALID_REF;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/* Parse named or positional reference. In case of positional
|
||||
references, can return negative values for $-n "deep" stack
|
||||
accesses. */
|
||||
static long
|
||||
parse_ref (char *cp, symbol_list *rule, int rule_length,
|
||||
int midrule_rhs_index, char *text, const location *text_loc,
|
||||
char dollar_or_at)
|
||||
{
|
||||
if ('$' == *cp)
|
||||
return LHS_REF;
|
||||
|
||||
if (c_isdigit (*cp) || (*cp == '-' && c_isdigit (cp[1])))
|
||||
return parse_positional_ref (cp, rule_length, text, text_loc);
|
||||
|
||||
bool const explicit_bracketing = *cp == '[';
|
||||
|
||||
if (explicit_bracketing)
|
||||
++cp;
|
||||
else
|
||||
ref_tail_fields = strpbrk (cp, ".-");
|
||||
|
||||
char const *cp_end = strchr (cp, explicit_bracketing ? ']' : '\0');
|
||||
|
||||
/* Add all relevant variants. */
|
||||
{
|
||||
int symbol_index;
|
||||
symbol_list *l;
|
||||
variant_count = 0;
|
||||
for (symbol_index = 0, l = rule; !symbol_list_null (l);
|
||||
++symbol_index, l = l->next)
|
||||
{
|
||||
if (l->content_type != SYMLIST_SYMBOL)
|
||||
continue;
|
||||
|
||||
variant *var
|
||||
= variant_add (l->content.sym->tag, l->sym_loc,
|
||||
symbol_index, cp, cp_end, explicit_bracketing);
|
||||
if (var && l->named_ref)
|
||||
var->hidden_by = l->named_ref;
|
||||
|
||||
if (l->named_ref)
|
||||
variant_add (l->named_ref->id, l->named_ref->loc,
|
||||
symbol_index, cp, cp_end, explicit_bracketing);
|
||||
}
|
||||
}
|
||||
|
||||
/* Check errors. */
|
||||
int valid_variants = 0;
|
||||
int valid_variant_index = 0;
|
||||
for (int i = 0; i < variant_count; ++i)
|
||||
{
|
||||
variant *var = &variant_table[i];
|
||||
int symbol_index = var->symbol_index;
|
||||
|
||||
/* Check visibility from midrule actions. */
|
||||
if (midrule_rhs_index != 0
|
||||
&& (symbol_index == 0 || midrule_rhs_index < symbol_index))
|
||||
var->err |= VARIANT_NOT_VISIBLE_FROM_MIDRULE;
|
||||
|
||||
/* Check correct bracketing. */
|
||||
if (!explicit_bracketing && contains_dot_or_dash (var->id))
|
||||
var->err |= VARIANT_BAD_BRACKETING;
|
||||
|
||||
/* Check using of hidden symbols. */
|
||||
if (var->hidden_by)
|
||||
var->err |= VARIANT_HIDDEN;
|
||||
|
||||
if (!var->err)
|
||||
{
|
||||
valid_variant_index = i;
|
||||
++valid_variants;
|
||||
}
|
||||
}
|
||||
|
||||
switch (valid_variants)
|
||||
{
|
||||
case 0:
|
||||
{
|
||||
int len = (explicit_bracketing || !ref_tail_fields) ?
|
||||
cp_end - cp : ref_tail_fields - cp;
|
||||
|
||||
complain (text_loc, complaint,
|
||||
_("invalid reference: %s"), quote (text));
|
||||
if (len == 0)
|
||||
{
|
||||
location sym_loc = *text_loc;
|
||||
sym_loc.start.column += 1;
|
||||
sym_loc.end = sym_loc.start;
|
||||
subcomplain (&sym_loc, complaint,
|
||||
_("syntax error after '%c', expecting integer, "
|
||||
"letter, '_', '[', or '$'"),
|
||||
dollar_or_at);
|
||||
}
|
||||
else if (midrule_rhs_index)
|
||||
subcomplain (&rule->rhs_loc, complaint,
|
||||
_("symbol not found in production before $%d: "
|
||||
"%.*s"),
|
||||
midrule_rhs_index, len, cp);
|
||||
else
|
||||
subcomplain (&rule->rhs_loc, complaint,
|
||||
_("symbol not found in production: %.*s"),
|
||||
len, cp);
|
||||
|
||||
if (variant_count > 0)
|
||||
show_sub_messages (complaint,
|
||||
cp, explicit_bracketing, midrule_rhs_index,
|
||||
dollar_or_at);
|
||||
return INVALID_REF;
|
||||
}
|
||||
case 1:
|
||||
{
|
||||
if (variant_count > 1)
|
||||
{
|
||||
complain (text_loc, Wother,
|
||||
_("misleading reference: %s"), quote (text));
|
||||
show_sub_messages (Wother,
|
||||
cp, explicit_bracketing, midrule_rhs_index,
|
||||
dollar_or_at);
|
||||
}
|
||||
{
|
||||
int symbol_index =
|
||||
variant_table[valid_variant_index].symbol_index;
|
||||
return (symbol_index == midrule_rhs_index) ? LHS_REF : symbol_index;
|
||||
}
|
||||
}
|
||||
case 2:
|
||||
default:
|
||||
{
|
||||
complain (text_loc, complaint,
|
||||
_("ambiguous reference: %s"), quote (text));
|
||||
show_sub_messages (complaint,
|
||||
cp, explicit_bracketing, midrule_rhs_index,
|
||||
dollar_or_at);
|
||||
return INVALID_REF;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* Keeps track of the maximum number of semantic values to the left of
|
||||
a handle (those referenced by $0, $-1, etc.) are required by the
|
||||
semantic actions of this grammar. */
|
||||
int max_left_semantic_context = 0;
|
||||
|
||||
|
||||
/* If CP points to a typename (i.e., <.*?>), set TYPE_NAME to its
|
||||
beginning (i.e., after the opening "<", and return the pointer
|
||||
immediately after it. */
|
||||
|
||||
static
|
||||
char *
|
||||
fetch_type_name (char *cp, char const **type_name,
|
||||
const location *dollar_loc)
|
||||
{
|
||||
if (*cp == '<')
|
||||
{
|
||||
*type_name = ++cp;
|
||||
/* Series of non-'>' or "->". */
|
||||
while (*cp != '>' || cp[-1] == '-')
|
||||
++cp;
|
||||
|
||||
/* The '>' symbol will be later replaced by '\0'. Original
|
||||
'text' is needed for error messages. */
|
||||
++cp;
|
||||
if (untyped_var_seen)
|
||||
complain (dollar_loc, complaint,
|
||||
_("explicit type given in untyped grammar"));
|
||||
tag_seen = true;
|
||||
}
|
||||
return cp;
|
||||
}
|
||||
|
||||
/*------------------------------------------------------------------.
|
||||
| TEXT is pointing to a wannabee semantic value (i.e., a '$'). |
|
||||
| |
|
||||
| Possible inputs: $[<TYPENAME>]($|INTEGER) |
|
||||
| |
|
||||
| Output to OBSTACK_FOR_STRING a reference to this semantic value. |
|
||||
`------------------------------------------------------------------*/
|
||||
|
||||
static void
|
||||
handle_action_dollar (symbol_list *rule, char *text, const location *dollar_loc)
|
||||
{
|
||||
symbol_list *effective_rule;
|
||||
int effective_rule_length;
|
||||
|
||||
if (rule->midrule_parent_rule)
|
||||
{
|
||||
effective_rule = rule->midrule_parent_rule;
|
||||
effective_rule_length = rule->midrule_parent_rhs_index - 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
effective_rule = rule;
|
||||
effective_rule_length = symbol_list_length (rule->next);
|
||||
}
|
||||
|
||||
/* The type name if explicit, otherwise left null. */
|
||||
char const *type_name = NULL;
|
||||
char *cp = fetch_type_name (text + 1, &type_name, dollar_loc);
|
||||
int n = parse_ref (cp, effective_rule, effective_rule_length,
|
||||
rule->midrule_parent_rhs_index, text, dollar_loc, '$');
|
||||
/* End type_name. Don't do it earlier: parse_ref depends on TEXT. */
|
||||
if (type_name)
|
||||
cp[-1] = '\0';
|
||||
|
||||
switch (n)
|
||||
{
|
||||
case INVALID_REF:
|
||||
break;
|
||||
|
||||
case LHS_REF:
|
||||
{
|
||||
symbol_list *sym = symbol_list_n_get (rule, 0);
|
||||
if (!type_name
|
||||
&& !sym->content.sym->content->type_name)
|
||||
{
|
||||
if (union_seen || tag_seen)
|
||||
{
|
||||
if (rule->midrule_parent_rule)
|
||||
complain (dollar_loc, complaint,
|
||||
_("$$ for the midrule at $%d of %s"
|
||||
" has no declared type"),
|
||||
rule->midrule_parent_rhs_index,
|
||||
quote (effective_rule->content.sym->tag));
|
||||
else
|
||||
complain (dollar_loc, complaint,
|
||||
_("$$ of %s has no declared type"),
|
||||
quote (rule->content.sym->tag));
|
||||
}
|
||||
else
|
||||
untyped_var_seen = true;
|
||||
}
|
||||
|
||||
obstack_printf (&obstack_for_string, "]b4_lhs_value(orig %d, ",
|
||||
sym->content.sym->content->number);
|
||||
obstack_quote (&obstack_for_string, type_name);
|
||||
obstack_sgrow (&obstack_for_string, ")[");
|
||||
rule->action_props.is_value_used = true;
|
||||
}
|
||||
break;
|
||||
|
||||
/* Reference to a RHS symbol. */
|
||||
default:
|
||||
{
|
||||
if (max_left_semantic_context < 1 - n)
|
||||
max_left_semantic_context = 1 - n;
|
||||
symbol_list *sym = 0 < n ? symbol_list_n_get (effective_rule, n) : NULL;
|
||||
if (!type_name
|
||||
&& (!sym || !sym->content.sym->content->type_name))
|
||||
{
|
||||
if (union_seen || tag_seen)
|
||||
complain (dollar_loc, complaint,
|
||||
_("$%s of %s has no declared type"), cp,
|
||||
quote (effective_rule->content.sym->tag));
|
||||
else
|
||||
untyped_var_seen = true;
|
||||
}
|
||||
|
||||
obstack_printf (&obstack_for_string,
|
||||
"]b4_rhs_value(%d, %d, ",
|
||||
effective_rule_length, n);
|
||||
if (sym)
|
||||
obstack_printf (&obstack_for_string, "%s%d, ",
|
||||
sym->content.sym->content->class == nterm_sym ? "orig " : "",
|
||||
sym->content.sym->content->number);
|
||||
else
|
||||
obstack_sgrow (&obstack_for_string, "[], ");
|
||||
|
||||
obstack_quote (&obstack_for_string, type_name);
|
||||
obstack_sgrow (&obstack_for_string, ")[");
|
||||
if (0 < n)
|
||||
{
|
||||
if (muscle_percent_define_ifdef ("api.value.automove")
|
||||
&& sym->action_props.is_value_used)
|
||||
complain (dollar_loc, Wother,
|
||||
_("multiple occurrences of $%d with api.value.automove"),
|
||||
n);
|
||||
sym->action_props.is_value_used = true;
|
||||
}
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*------------------------------------------------------.
|
||||
| TEXT is a location token (i.e., a '@...'). Output to |
|
||||
| OBSTACK_FOR_STRING a reference to this location. |
|
||||
`------------------------------------------------------*/
|
||||
|
||||
static void
|
||||
handle_action_at (symbol_list *rule, char *text, const location *at_loc)
|
||||
{
|
||||
symbol_list *effective_rule;
|
||||
int effective_rule_length;
|
||||
|
||||
if (rule->midrule_parent_rule)
|
||||
{
|
||||
effective_rule = rule->midrule_parent_rule;
|
||||
effective_rule_length = rule->midrule_parent_rhs_index - 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
effective_rule = rule;
|
||||
effective_rule_length = symbol_list_length (rule->next);
|
||||
}
|
||||
|
||||
muscle_percent_define_ensure ("locations", *at_loc, true);
|
||||
|
||||
int n = parse_ref (text + 1, effective_rule, effective_rule_length,
|
||||
rule->midrule_parent_rhs_index, text, at_loc, '@');
|
||||
switch (n)
|
||||
{
|
||||
case INVALID_REF:
|
||||
break;
|
||||
|
||||
case LHS_REF:
|
||||
obstack_sgrow (&obstack_for_string, "]b4_lhs_location[");
|
||||
break;
|
||||
|
||||
default:
|
||||
obstack_printf (&obstack_for_string, "]b4_rhs_location(%d, %d)[",
|
||||
effective_rule_length, n);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*-------------------------.
|
||||
| Initialize the scanner. |
|
||||
`-------------------------*/
|
||||
|
||||
/* Translate the '$...' and '@...' in \a self, in the context \a
|
||||
sc_context (SC_RULE_ACTION, SC_SYMBOL_ACTION, INITIAL). */
|
||||
|
||||
static char const *
|
||||
translate_action (code_props *self, int sc_context)
|
||||
{
|
||||
loc->start = loc->end = self->location.start;
|
||||
yy_switch_to_buffer (yy_scan_string (self->code));
|
||||
char *res = code_lex (self, sc_context);
|
||||
yy_delete_buffer (YY_CURRENT_BUFFER);
|
||||
return res;
|
||||
}
|
||||
|
||||
/*------------------------------------------------------------------------.
|
||||
| Implementation of the public interface as documented in "scan-code.h". |
|
||||
`------------------------------------------------------------------------*/
|
||||
|
||||
void
|
||||
code_props_none_init (code_props *self)
|
||||
{
|
||||
*self = code_props_none;
|
||||
}
|
||||
|
||||
code_props code_props_none = CODE_PROPS_NONE_INIT;
|
||||
|
||||
void
|
||||
code_props_plain_init (code_props *self, char const *code,
|
||||
location code_loc)
|
||||
{
|
||||
code_props_none_init (self);
|
||||
self->kind = CODE_PROPS_PLAIN;
|
||||
self->code = code;
|
||||
self->location = code_loc;
|
||||
}
|
||||
|
||||
void
|
||||
code_props_symbol_action_init (code_props *self, char const *code,
|
||||
location code_loc)
|
||||
{
|
||||
code_props_none_init (self);
|
||||
self->kind = CODE_PROPS_SYMBOL_ACTION;
|
||||
self->code = code;
|
||||
self->location = code_loc;
|
||||
}
|
||||
|
||||
void
|
||||
code_props_rule_action_init (code_props *self, char const *code,
|
||||
location code_loc, symbol_list *rule,
|
||||
named_ref *name, uniqstr type,
|
||||
bool is_predicate)
|
||||
{
|
||||
code_props_none_init (self);
|
||||
self->kind = CODE_PROPS_RULE_ACTION;
|
||||
self->code = code;
|
||||
self->location = code_loc;
|
||||
self->rule = rule;
|
||||
self->named_ref = name;
|
||||
self->type = type;
|
||||
self->is_predicate = is_predicate;
|
||||
}
|
||||
|
||||
void
|
||||
code_props_translate_code (code_props *self)
|
||||
{
|
||||
switch (self->kind)
|
||||
{
|
||||
case CODE_PROPS_NONE:
|
||||
break;
|
||||
case CODE_PROPS_PLAIN:
|
||||
self->code = translate_action (self, INITIAL);
|
||||
break;
|
||||
case CODE_PROPS_SYMBOL_ACTION:
|
||||
self->code = translate_action (self, SC_SYMBOL_ACTION);
|
||||
break;
|
||||
case CODE_PROPS_RULE_ACTION:
|
||||
self->code = translate_action (self, SC_RULE_ACTION);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
code_scanner_last_string_free (void)
|
||||
{
|
||||
STRING_FREE ();
|
||||
}
|
||||
|
||||
void
|
||||
code_scanner_init (void)
|
||||
{
|
||||
obstack_init (&obstack_for_string);
|
||||
yy_flex_debug = 0;
|
||||
}
|
||||
|
||||
void
|
||||
code_scanner_free (void)
|
||||
{
|
||||
obstack_free (&obstack_for_string, 0);
|
||||
variant_table_free ();
|
||||
|
||||
/* Reclaim Flex's buffers. */
|
||||
yylex_destroy ();
|
||||
}
|
||||
Reference in New Issue
Block a user