# Executing Actions.                               -*- Autotest -*-

# Copyright (C) 2002, 2004-2005, 2007, 2009-2015, 2018-2022 Free
# Software Foundation, Inc.

# This program is free software: you can redistribute it and/or modify
# 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.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

AT_BANNER([[Sync Lines.]])


# _AT_SYNCLINES_COMPILE(FILE)
# ---------------------------
# Compile FILE expecting an error, and save in the file stdout the
# normalized output.  Ignore the exit status, since some compilers
# (e.g. c89 on IRIX 6.5) trigger warnings on '#error', instead of
# errors.
#
# Transform the file 'stderr' into something like this:
#
#   input.y:4: #error "4"
#
# In case GCC displays column information, strip it down.
#
#   input.y:4:2: #error "4"    or
#   input.y:4.2: #error "4"    or
#   input.y:4:2: error: #error "4"
# =>
#   input.y:4: #error "4"
#
# It may also issue more context information:
#
#   input.y: In function 'yyparse':
#   input.y:8: #error "8"
# =>
#   input.y:4: #error "8"
#
# The message may include a caret-error (indented by GCC 4.8,
# not by clang 3.2):
#
#   input.y:1:2: error: #error "1"
#    #error "1"
#     ^
#
# Possibly distcc adds its bits.
#
#   distcc[33187] ERROR: compile (null) on localhost failed
#   syncline.c:1:2: error: #error "1"
#   distcc[33185] ERROR: compile syncline.c on localhost failed
#
# or even
#
#   distcc[35882] (dcc_connect_by_name) ERROR: failed to look up host "chrisimac": Unknown host
#   distcc[35882] Warning: failed to distribute input.c to chrisimac/4, running locally instead
#
# The compiler might end by the number of messages issued (Clang 3.2):
#
#    syncline.c:1:2: error: "1"
#    #error "1"
#     ^
#    1 error generated.
#
# When c++ is used to compiler C, we might have more messages (Clang 3.2):
#
#    clang: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated
#
#
# xlc reports things like:
#
#    "input.yy", line 80.21: 1540-0218 (S) The call does not match any parameter list for "operator<<".
#    "/usr/vacpp/include/iosfwd", line 32.6: 1506-205 (S) #error This file to be used only with IBM VisualAge C++ v4 and later compilers
#
# Newer GCCs go further and if the function is declared static, complain
# that it's not used.
#
# GCC 7 also underlines the error.
#
#    syncline.c:4:2: error: #error "4"
#     #error "4"
#      ^~~~~
#
# GCC 9 displays a left-hand margin with the line number:
#
#    syncline.c: In function 'foo':
#    syncline.c:4:2: error: #error "4"
#        4 | #error "4"
#          |  ^~~~~
m4_define([_AT_SYNCLINES_COMPILE],
[AT_CHECK([$CC $CFLAGS $CPPFLAGS -c $1], [ignore], [], [stderr])
AT_CHECK([["$PERL" -p -0777 - stderr <<\EOF || exit 77
  # Remove left-hand margin.
  s/^[\d ]{6}\| //gm;

  # 1. Remove useless lines.

  # distcc clutter.
  s/^distcc\[\d+\] .*\n//gm;
  # c vs. c++.
  s/^clang: warning: treating 'c' input as 'c\+\+'.*\n//gm;
  # Function context.
  s/^[^:]*: In function '[^']+':\n//gm;
  # Caret error (with possible '~' to underline).
  s/^ *#error.*\n *\^~*\n//gm;
  # Number of errors.
  s/^1 error generated\.\n//gm;

  # 2. Normalize the lines we kept.

  # xlc messages.  Remove also error identifier (e.g., "1540-0218 (S)").
  s/^"(.*?)", line ([\w.]*): \d+-\d+ \(.\) /$][1:$][2: /gm;
  # Remove column.
  s/^([^:]+:\d+)[.:][^:]+:(.+)$/$][1:$][2/gm;
  # Map all combinations of "error: " and "#error: " to "#error ".
  s/^([^:]+:\d+):( |#error|error|:)+/$][1: #error /gm;
EOF
]],
  0, [stdout])
])



# AT_SYNCLINES_COMPILE(FILE)
# --------------------------
# Compile FILE expecting an error, and save in the file 'stdout' the
# normalized output.  If we can't get a trustable location
# from the compiler, just skip the test.
#
# It seems impossible to find a generic scheme to check the location
# of an error.  Even requiring GCC is not sufficient, since for instance
# the version modified by Apple:
#
# | Reading specs from /usr/libexec/gcc/darwin/ppc/2.95.2/specs
# | Apple Computer, Inc. version gcc-934.3, based on gcc version 2.95.2
# | 19991024 (release) configure:2124: $? = 0
#
# instead of:
#
# | input.y:2: #error "2"
#
# it reports:
#
# | input.y:2: "2"
# | cpp-precomp: warning: errors during smart preprocessing, retrying in basic mode
m4_define([AT_SYNCLINES_COMPILE],
[# Check if we can trust location translation.
AT_DATA([syncline.c],
[[void foo (void);
void foo (void)
{
#error "4"
}
]])

_AT_SYNCLINES_COMPILE([syncline.c])
AT_REQUIRE([[test "`cat stdout`" = 'syncline.c:4: @%:@error "4"']])

# Then work for real.
_AT_SYNCLINES_COMPILE([$1])
])


# AT_TEST(TITLE, INPUT, ERROR-MSG)
# --------------------------------
# Check that compiling the parser produced from INPUT cause GCC
# to issue ERROR-MSG.
m4_pushdef([AT_TEST],
[AT_SETUP([$1])
AT_BISON_OPTION_PUSHDEFS

AT_DATA([[input.y]], [$2])
AT_BISON_CHECK([-o input.c input.y])
AT_SYNCLINES_COMPILE([input.c])
AT_CHECK([cat stdout], 0, [$3])
AT_BISON_OPTION_POPDEFS
AT_CLEANUP
])


## ------------------- ##
## Prologue syncline.  ##
## ------------------- ##


AT_TEST([Prologue syncline],
[[%{
#error "2"
%}
%code {
  ]AT_YYERROR_DECLARE_EXTERN[
  ]AT_YYLEX_DECLARE_EXTERN[
}
%%
exp: '0';
%%
]],
[input.y:2: #error "2"
])


## ----------------- ##
## %union syncline.  ##
## ----------------- ##

AT_TEST([%union syncline],
[[%union {
#error "2"
  char dummy;
}
%code {
  ]AT_YYERROR_DECLARE_EXTERN[
  ]AT_YYLEX_DECLARE_EXTERN[
}
%%
exp: '0';
%%
]],
[input.y:2: #error "2"
])


## ---------------------- ##
## %union name syncline.  ##
## ---------------------- ##

# Check that invalid union names are properly reported in the
# source file.
AT_SETUP([%union name syncline])
AT_BISON_OPTION_PUSHDEFS
AT_DATA([[input.y]],
[[%union break
{
  char dummy;
}
%code {
  ]AT_YYERROR_DECLARE_EXTERN[
  ]AT_YYLEX_DECLARE_EXTERN[
%}
%%
exp: '0';
%%
]])

AT_BISON_CHECK([-o input.c input.y])
AT_SYNCLINES_COMPILE([input.c])
AT_CHECK([[grep '^input.y:1' stdout]], 0, [ignore])
AT_BISON_OPTION_POPDEFS
AT_CLEANUP


## ----------------------- ##
## Postprologue syncline.  ##
## ----------------------- ##

AT_TEST([Postprologue syncline],
[[%code {
  ]AT_YYERROR_DECLARE_EXTERN[
  ]AT_YYLEX_DECLARE_EXTERN[
}
%{
  /* Preprologue.  */
%}
%union
{
  int ival;
}
%{
#error "13"
%}
%%
exp: '0';
%%
]],
[input.y:13: #error "13"
])


## ----------------- ##
## Action syncline.  ##
## ----------------- ##

AT_TEST([Action syncline],
[[%code {
  ]AT_YYERROR_DECLARE_EXTERN[
  ]AT_YYLEX_DECLARE_EXTERN[
}
%%
exp:
{
#error "8"
};
]],
[input.y:8: #error "8"
])


## ------------------- ##
## Epilogue syncline.  ##
## ------------------- ##

AT_TEST([Epilogue syncline],
[[%code {
  ]AT_YYERROR_DECLARE_EXTERN[
  ]AT_YYLEX_DECLARE_EXTERN[
}
%%
exp: '0';
%%
#error "8"
]],
[input.y:8: #error "8"
])

## -------------------- ##
## %code top syncline.  ##
## -------------------- ##

AT_TEST([%code top syncline],
[[%code top {
#error "2"
}
%code {
  ]AT_YYERROR_DECLARE_EXTERN[
  ]AT_YYLEX_DECLARE_EXTERN[
}
%%
exp: '0';
%%
]],
[input.y:2: #error "2"
])

## ---------------------- ##
## %destructor syncline.  ##
## ---------------------- ##

AT_TEST([%destructor syncline],
[[%destructor {
#error "2"
} <ival>
%{
]AT_YYERROR_DECLARE_EXTERN[
]AT_YYLEX_DECLARE_EXTERN[
%}
%union {
  int ival;
}
%type <ival> exp
%%
exp: '0' { $$ = 0; };
%%
]],
[input.y:2: #error "2"
])


## ------------------- ##
## %printer syncline.  ##
## ------------------- ##

AT_TEST([%printer syncline],
[[%printer {
#error "2"
} <ival>
%debug
%code {
  ]AT_YYERROR_DECLARE_EXTERN[
  ]AT_YYLEX_DECLARE_EXTERN[
}
%union {
  int ival;
}
%type <ival> exp
%%
exp: '0' { $$ = 0; };
%%
]],
[input.y:2: #error "2"
])

m4_popdef([AT_TEST])



## ------------------ ##
## syncline escapes.  ##
## ------------------ ##

# AT_TEST([SKELETON])
# -------------------
m4_pushdef([AT_TEST],
[AT_SETUP([syncline escapes: $1])

AT_BISON_OPTION_PUSHDEFS([%skeleton "$1"])

# ICC is unable to handle these file names: it fails to pass them
# properly to the linker, and is unable to save a file named this way.
# Don't try with such compilers.
AT_DATA([\"\\\"\".AT_LANG_EXT],
[[int main (void) { return 0; }
]])

AT_REQUIRE([AT_CXX_IF([$CXX $CXXFLAGS], [$CC $CFLAGS]) $CPPFLAGS \"\\\"\".]AT_LANG_EXT[ -o \"\\\"\"],
                 [0], [ignore], [ignore])

AT_DATA_GRAMMAR([\"\\\"\".y],
[[%skeleton "$1"
%code {
  ]AT_YYERROR_DECLARE[
  ]AT_YYLEX_DECLARE[
}
%destructor {} <>
%printer {} <>
%%
exp: '0'
%%
]AT_YYERROR_DEFINE[
]AT_YYLEX_DEFINE[
]AT_MAIN_DEFINE[
]])

# Maybe we tried to create a file name that the file system does not
# support.
AT_SKIP_IF([[test ! -f \"\\\"\".y]])
AT_FULL_COMPILE([\"\\\"\"])
AT_BISON_OPTION_POPDEFS

AT_CLEANUP
])

m4_map_args([AT_TEST], [yacc.c], [glr.c], [lalr1.cc], [glr.cc], [glr2.cc])

m4_popdef([AT_TEST])



## ----------- ##
## %no-lines.  ##
## ----------- ##

# AT_TEST([SKELETON])
# -------------------
m4_pushdef([AT_TEST],
[AT_SETUP([%no-lines: $1])

AT_BISON_OPTION_PUSHDEFS([%skeleton "$1" %header])
AT_DATA_GRAMMAR([input.y],
[[%skeleton "$1" %header
%{
]AT_YYERROR_DECLARE_EXTERN[
]AT_YYLEX_DECLARE_EXTERN[
%}
%union {
  int ival;
}
%%
exp: '0'
]])

# Generate without.* without the #line.  Don't use -o without.c which
# would change the content (e.g., CPP guard depend on the output file
# name).
AT_BISON_CHECK([--no-lines -o input.AT_LANG_EXT -d input.y])
AT_CHECK([mv input.]AT_LANG_EXT[ without.]AT_LANG_EXT[])
AT_CHECK([mv input.]AT_LANG_HDR[ without.]AT_LANG_HDR[])
# There is no #line at all.
AT_CHECK([grep '#line' *.]AT_LANG_EXT[ *.]AT_LANG_HDR[], 1)

# Generate with.* without the #line.
AT_BISON_CHECK([-o input.AT_LANG_EXT -d input.y])
AT_CHECK([mv input.]AT_LANG_EXT[ with.]AT_LANG_EXT[])
AT_CHECK([mv input.]AT_LANG_HDR[ with.]AT_LANG_HDR[])

# The implementation file with --no-line is exactly the
# original one with #lines removed.
AT_CHECK([grep -v '#line' with.]AT_LANG_EXT[ >expout])
AT_CHECK([cat without.AT_LANG_EXT], 0, [expout])

# Likewise for the header.
AT_CHECK([grep -v '#line' with.]AT_LANG_HDR[ >expout])
AT_CHECK([cat without.AT_LANG_HDR], 0, [expout])

AT_BISON_OPTION_POPDEFS

AT_CLEANUP
])

m4_map_args([AT_TEST], [yacc.c], [glr.c], [lalr1.cc], [glr.cc], [glr2.cc])

m4_popdef([AT_TEST])



## ---------------- ##
## Output columns.  ##
## ---------------- ##

AT_SETUP([Output columns])

# This test is fragile: its point is to check the compiler's error
# message, but it seems too hard to do portability (even between
# version of GCC).  So instead, let's just check the generated code
# itself.

AT_BISON_OPTION_PUSHDEFS
AT_DATA([input.y],
[[%{
]AT_YYERROR_DECLARE_EXTERN[
]AT_YYLEX_DECLARE_EXTERN[
%}
%define api.value.type union
%type <int> '0' exp
%destructor { /* --BEGIN */
              destructor
              /* --END   */ } <*>
%printer { /* --BEGIN */
           printer
           /* --END   */ } <*>



%left '+'
%%
exp: exp '+' exp {  /* --BEGIN */
                    $$ = $1 + $3;
                    @$ = @1 + @3;
                    /* --END */ }
   | '0'
]])

AT_BISON_CHECK([-o input.c input.y])
AT_CHECK([[sed -ne '/--BEGIN/,/--END/{' \
    -e '/input.c/s/ [0-9]* / LINE /;' \
    -e 'p;}' \
    input.c]], 0,
[[         { /* --BEGIN */
           printer
           /* --END   */ }
         { /* --BEGIN */
           printer
           /* --END   */ }
            { /* --BEGIN */
              destructor
              /* --END   */ }
            { /* --BEGIN */
              destructor
              /* --END   */ }
                 {  /* --BEGIN */
                    (yyval.exp) = (yyvsp[-2].exp) + (yyvsp[0].exp);
                    (yyloc) = (yylsp[-2]) + (yylsp[0]);
                    /* --END */ }
]])

AT_BISON_OPTION_POPDEFS
AT_CLEANUP