])dnl
m4_if(m4_sysval, [0], [], [m4_fatal([$0: cannot write to stdout])])])
-# b4_error(KIND, FORMAT, [ARG1], [ARG2], ...)
-# -------------------------------------------
-# Write @KIND(FORMAT@,ARG1@,ARG2@,...@) to stdout.
+# b4_error(KIND, START, END, FORMAT, [ARG1], [ARG2], ...)
+# -------------------------------------------------------
+# Write @KIND(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout.
#
# For example:
#
-# b4_error([[warn]], [[invalid value for '%s': %s]], [[foo]], [[3]])
+# b4_error([[complain]], [[input.y:2.3]], [[input.y:5.4]],
+# [[invalid %s]], [[foo]])
m4_define([b4_error],
-[b4_cat([[@]$1[(]$2[]]dnl
-[m4_if([$#], [2], [],
- [m4_foreach([b4_arg],
- m4_dquote(m4_shift(m4_shift($@))),
- [[@,]b4_arg])])[@)]])])
-
-# b4_error_at(KIND, START, END, FORMAT, [ARG1], [ARG2], ...)
-# ----------------------------------------------------------
-# Write @KIND_at(START@,END@,FORMAT@,ARG1@,ARG2@,...@) to stdout.
-#
-# For example:
-#
-# b4_error_at([[complain]], [[input.y:2.3]], [[input.y:5.4]],
-# [[invalid %s]], [[foo]])
-m4_define([b4_error_at],
-[b4_cat([[@]$1[_at(]$2[@,]$3[@,]$4[]]dnl
+[b4_cat([[@complain][(]$1[@,]$2[@,]$3[@,]$4[]]dnl
[m4_if([$#], [4], [],
[m4_foreach([b4_arg],
m4_dquote(m4_shift(m4_shift(m4_shift(m4_shift($@))))),
# m4_define([asdf], [ASDF])
# m4_define([fsa], [FSA])
# m4_define([fdsa], [FDSA])
-# b4_warn([[[asdf), asdf]]], [[[fsa), fsa]]], [[[fdsa), fdsa]]])
-# b4_warn([[asdf), asdf]], [[fsa), fsa]], [[fdsa), fdsa]])
-# b4_warn()
-# b4_warn(1)
-# b4_warn(1, 2)
+# b4_warn_at([[[asdf), asdf]]], [[[fsa), fsa]]], [[[fdsa), fdsa]]])
+# b4_warn_at([[asdf), asdf]], [[fsa), fsa]], [[fdsa), fdsa]])
+# b4_warn_at()
+# b4_warn_at(1)
+# b4_warn_at(1, 2)
#
# Should produce this without newlines:
#
-# @warn([asdf), asdf]@,[fsa), fsa]@,[fdsa), fdsa]@)
-# @warn(asdf), asdf@,fsa), fsa@,fdsa), fdsa@)
+# @warn_at([asdf), asdf]@,@,@,[fsa), fsa]@,[fdsa), fdsa]@)
+# @warn(asdf), asdf@,@,@,fsa), fsa@,fdsa), fdsa@)
# @warn(@)
# @warn(1@)
# @warn(1@,2@)
m4_define([b4_warn],
-[b4_error([[warn]], $@)])
+[b4_error([[warn]], [], [], $@)])
# b4_warn_at(START, END, FORMAT, [ARG1], [ARG2], ...)
# ---------------------------------------------------
#
# b4_warn_at([[input.y:2.3]], [[input.y:5.4]], [[invalid %s]], [[foo]])
m4_define([b4_warn_at],
-[b4_error_at([[warn]], $@)])
+[b4_error([[warn]], $@)])
# b4_complain(FORMAT, [ARG1], [ARG2], ...)
# ----------------------------------------
-# Write @complain(FORMAT@,ARG1@,ARG2@,...@) to stdout.
+# Bounce to b4_complain_at.
#
# See b4_warn example.
m4_define([b4_complain],
-[b4_error([[complain]], $@)])
+[b4_error([[complain]], [], [], $@)])
# b4_complain_at(START, END, FORMAT, [ARG1], [ARG2], ...)
# -------------------------------------------------------
#
# See b4_warn_at example.
m4_define([b4_complain_at],
-[b4_error_at([[complain]], $@)])
+[b4_error([[complain]], $@)])
# b4_fatal(FORMAT, [ARG1], [ARG2], ...)
# -------------------------------------
-# Write @fatal(FORMAT@,ARG1@,ARG2@,...@) to stdout and exit.
+# Bounce to b4_fatal_at.
#
# See b4_warn example.
m4_define([b4_fatal],
-[b4_error([[fatal]], $@)dnl
+[b4_error([[fatal]], [], [], $@)dnl
m4_exit(1)])
# b4_fatal_at(START, END, FORMAT, [ARG1], [ARG2], ...)
#
# See b4_warn_at example.
m4_define([b4_fatal_at],
-[b4_error_at([[fatal]], $@)dnl
+[b4_error([[fatal]], $@)dnl
m4_exit(1)])
-## ---------------- ##
-## Default values. ##
-## ---------------- ##
-
-# m4_define_default([b4_lex_param], []) dnl breaks other skeletons
-m4_define_default([b4_pre_prologue], [])
-m4_define_default([b4_post_prologue], [])
-m4_define_default([b4_epilogue], [])
-m4_define_default([b4_parse_param], [])
-
-# The initial column and line.
-m4_define_default([b4_location_initial_column], [1])
-m4_define_default([b4_location_initial_line], [1])
-
-
## ------------ ##
## Data Types. ##
## ------------ ##
[m4_eval([$1 - $2])],
[($1) - ($2)])])
-# b4_args(ARG1, ...)
-# _b4_args(ARG1, ...)
+# b4_join(ARG1, ...)
+# _b4_join(ARG1, ...)
# -------------------
# Join with comma, skipping empty arguments.
-# b4_args calls itself recursively until it sees the first non-empty
-# argument, then calls _b4_args which prepends each non-empty argument
+# b4_join calls itself recursively until it sees the first non-empty
+# argument, then calls _b4_join which prepends each non-empty argument
# with a comma.
-m4_define([b4_args],
+m4_define([b4_join],
[m4_if([$#$1],
[1], [],
[m4_ifval([$1],
[$1[]_$0(m4_shift($@))],
[$0(m4_shift($@))])])])
-# _b4_args(ARGS1, ...)
+# _b4_join(ARGS1, ...)
# --------------------
-m4_define([_b4_args],
+m4_define([_b4_join],
[m4_if([$#$1],
[1], [],
[m4_ifval([$1], [, $1])[]$0(m4_shift($@))])])
# _b4_define_flag_if($1, $2, FLAG)
# --------------------------------
-# This macro works around the impossibility to define macros
-# inside macros, because issuing `[$1]' is not possible in M4 :(.
-# This sucks hard, GNU M4 should really provide M5 like $$1.
+# Work around the impossibility to define macros inside macros,
+# because issuing `[$1]' is not possible in M4. GNU M4 should provide
+# $$1 a la M5/TeX.
m4_define([_b4_define_flag_if],
[m4_if([$1$2], $[1]$[2], [],
[m4_fatal([$0: Invalid arguments: $@])])dnl
b4_define_flag_if([defines]) # Whether headers are requested.
b4_define_flag_if([glr]) # Whether a GLR parser is requested.
b4_define_flag_if([nondeterministic]) # Whether conflicts should be handled.
+b4_define_flag_if([token_table]) # Whether yytoken_table is demanded.
b4_define_flag_if([yacc]) # Whether POSIX Yacc is emulated.
## Symbols. ##
## --------- ##
+# In order to unify the handling of the various aspects of symbols
+# (tag, type_name, whether terminal, etc.), bison.exe defines one
+# macro per (token, field), where field can has_id, id, etc.: see
+# src/output.c:prepare_symbols_definitions().
+#
+# The following macros provide access to these values.
+
# b4_symbol_(NUM, FIELD)
# ----------------------
# Recover a FIELD about symbol #NUM. Thanks to m4_indir, fails if
# Same as in C, but using references instead of pointers.
m4_define([b4_symbol_action],
[b4_symbol_if([$1], [has_$2],
-[m4_pushdef([b4_dollar_dollar],
- [b4_symbol_value([(*yyvaluep)],
- b4_symbol_if([$1], [has_type],
- [b4_symbol([$1], [type])]))])dnl
-m4_pushdef([b4_at_dollar], [(*yylocationp)])dnl
- b4_symbol_case_([$1])
+[b4_dollar_pushdef([(*yyvaluep)],
+ b4_symbol_if([$1], [has_type],
+ [m4_dquote(b4_symbol([$1], [type]))]),
+ [(*yylocationp)])dnl
+ b4_symbol_case_([$1])[]dnl
b4_syncline([b4_symbol([$1], [$2_line])], ["b4_symbol([$1], [$2_file])"])
b4_symbol([$1], [$2])
b4_syncline([@oline@], [@ofile@])
break;
-m4_popdef([b4_at_dollar])dnl
-m4_popdef([b4_dollar_dollar])dnl
+b4_dollar_popdef[]dnl
])])
m4_define([b4_symbol_foreach],
[m4_map([$1], m4_defn([b4_symbol_numbers]))])
+# b4_symbol_map(MACRO)
+# --------------------
+# Return a list (possibly empty elements) of MACRO invoked for each
+# SYMBOL-NUM.
+m4_define([b4_symbol_map],
+[m4_map_args_sep([$1(], [)], [,], b4_symbol_numbers)])
+
+
+# b4_token_visible_if(NUM, IF-TRUE, IF-FALSE)
+# -------------------------------------------
+# Whether NUM denotes a token that has an exported definition (i.e.,
+# shows in enum yytokentype).
+m4_define([b4_token_visible_if],
+[b4_symbol_if([$1], [is_token],
+ [b4_symbol_if([$1], [has_id], [$2], [$3])],
+ [$3])])
+
+# b4_token_has_definition(NUM)
+# ----------------------------
+# 1 if NUM is visible, nothing otherwise.
+m4_define([b4_token_has_definition],
+[b4_token_visible_if([$1], [1])])
+
+# b4_any_token_visible_if([IF-TRUE], [IF-FALSE])
+# ----------------------------------------------
+# Whether there is a token that needs to be defined.
+m4_define([b4_any_token_visible_if],
+[m4_ifval(b4_symbol_foreach([b4_token_has_definition]),
+ [$1], [$2])])
+
+
+# b4_token_format(FORMAT, NUM)
+# ----------------------------
+m4_define([b4_token_format],
+[b4_token_visible_if([$2],
+[m4_quote(m4_format([$1],
+ [b4_symbol([$2], [id])],
+ [b4_symbol([$2], [user_number])]))])])
+
## ------- ##
## Types. ##
[$1],
m4_dquote(m4_indir([b4_percent_define(]$1[)])))
m4_foreach([b4_value], m4_dquote(m4_shift($@)),
- [b4_complain_at(b4_percent_define_get_loc([$1]),
+ [b4_error([[note]], b4_percent_define_get_loc([$1]), []
[[accepted value: '%s']],
m4_dquote(b4_value))])])dnl
m4_popdef([b4_good_value])],
[verbose], [[1]])])
b4_define_flag_if([error_verbose])
+# yytoken_table is needed to support verbose errors.
+b4_error_verbose_if([m4_define([b4_token_table_flag], [1])])
+
## ----------------------------------------------------------- ##
## After processing the skeletons, check that all the user's ##
b4_check_user_names_wrap([[define]], [[variable]])
b4_check_user_names_wrap([[code]], [[qualifier]])
])
+
+
+## ---------------- ##
+## Default values. ##
+## ---------------- ##
+
+# m4_define_default([b4_lex_param], []) dnl breaks other skeletons
+m4_define_default([b4_pre_prologue], [])
+m4_define_default([b4_post_prologue], [])
+m4_define_default([b4_epilogue], [])
+m4_define_default([b4_parse_param], [])
+
+# The initial column and line.
+m4_define_default([b4_location_initial_column], [1])
+m4_define_default([b4_location_initial_line], [1])
+
+# Sanity checks.
+b4_percent_define_ifdef([api.prefix],
+[m4_ifdef([b4_prefix],
+[b4_complain_at(b4_percent_define_get_loc([api.prefix]),
+ [['%s' and '%s' cannot be used together]],
+ [%name-prefix],
+ [%define api.prefix])])])
projects / bison.git / blobdiff