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all: show the rules in comments before the user actions

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For instance, in the case of Bison's own parser:

    -  case 40:
    +  case 40:  /* grammar_declaration: "%code" "identifier" "{...}"  */
         {
           muscle_percent_code_grow ((yyvsp[-1].ID), (yylsp[-1]),
                                     translate_code_braceless ((yyvsp[0].BRACED_CODE), (yylsp[0])),
                                     (yylsp[0]));
           code_scanner_last_string_free ();
         }
         break;

* data/skeletons/c.m4: Modified.
* data/skeletons/d.m4: Modified.
* data/skeletons/java.m4: Modified.
* src/output.c (output_escaped): New.
(quoted_output): Use it, and rename as...
(output_quoted): this.
Adjust dependencies.
(rule_output): New.
(user_actions_output): Use it.
* data/skeletons/c.m4, data/skeletons/d.m4, data/skeletons/java.m4
(b4_case): Add support for $3, an optional comment.
This commit is contained in:
Akim Demaille
2020-06-05 16:51:59 +02:00
parent 2101b0e210
commit 39be113b1f
6 changed files with 140 additions and 119 deletions
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6
data/skeletons/c.m4
View File

@@ -666,10 +666,10 @@ m4_define([b4_sync_start], [[#]line $1 $2])
## User actions. ##
## -------------- ##
# b4_case(LABEL, STATEMENTS)
# --------------------------
# b4_case(LABEL, STATEMENTS, [COMMENTS])
# --------------------------------------
m4_define([b4_case],
[ case $1:
[ case $1:m4_ifval([$3], [ b4_comment([$3])])
$2
b4_syncline([@oline@], [@ofile@])dnl
break;])

6
data/skeletons/d.m4
View File

@@ -213,9 +213,9 @@ m4_define([b4_declare_symbol_enum],
# b4-case(ID, CODE)
# -----------------
m4_define([b4_case], [ case $1:
# b4-case(ID, CODE, [COMMENTS])
# -----------------------------
m4_define([b4_case], [ case $1:m4_ifval([$3], [ b4_comment([$3])])
$2
break;])

6
data/skeletons/java.m4
View File

@@ -262,11 +262,11 @@ m4_define([b4_declare_symbol_enum],
# b4_case(ID, CODE)
# -----------------
# b4_case(ID, CODE, [COMMENTS])
# -----------------------------
# We need to fool Java's stupid unreachable code detection.
m4_define([b4_case],
[ case $1:
[ case $1:m4_ifval([$3], [ b4_comment([$3])])
if (yyn == $1)
$2;
break;