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* src/reader.c (copy_at, copy_dollarm parse_braces, parse_action)

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(parse_guard): Rename the formal argument `stack_offset' as
`rule_length', which is more readable.
Adjust callers.
(copy_at, copy_dollar): Instead of outputting the hard coded
values of $$, $n and so forth, output invocation to b4_lhs_value,
b4_lhs_location, b4_rhs_value, and b4_rhs_location.
* data/bison.simple, data/bison.c++ (b4_lhs_value)
(b4_lhs_location, b4_rhs_value, and b4_rhs_location: New.
This commit is contained in:
Akim Demaille
2002-05-02 14:33:48 +00:00
parent 6cbfbcc58c
commit 82b6cb3fb2
5 changed files with 121 additions and 62 deletions
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30
data/bison.c++
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@@ -20,6 +20,36 @@ m4_define([b4_uint_type],
[m4_fatal([no unsigned int type for $1])])])
# b4_lhs_value([TYPE])
# --------------------
# Expansion of $<TYPE>$.
m4_define([b4_lhs_value],
[yyval[]m4_ifval([$1], [.$1])])
# b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
# --------------------------------------
# Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
# symbols on RHS.
m4_define([b4_rhs_value],
[yyvsp@<:@m4_eval([$2 - $1])@:>@m4_ifval([$3], [.$3])])
# b4_lhs_location()
# -----------------
# Expansion of @$.
m4_define([b4_lhs_location],
[yyloc])
# b4_rhs_location(RULE-LENGTH, NUM)
# ---------------------------------
# Expansion of @NUM, where the current rule has RULE-LENGTH symbols
# on RHS.
m4_define([b4_rhs_location],
[yylsp@<:@m4_eval([$2 - $1])@:>@])
# b4_token_defines(TOKEN-NAME, TOKEN-NUMBER)
# ------------------------------------------
# Output the definition of this token as #define.

30
data/bison.simple
View File

@@ -20,6 +20,36 @@ m4_define([b4_uint_type],
[m4_fatal([no unsigned int type for $1])])])
# b4_lhs_value([TYPE])
# --------------------
# Expansion of $<TYPE>$.
m4_define([b4_lhs_value],
[yyval[]m4_ifval([$1], [.$1])])
# b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
# --------------------------------------
# Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
# symbols on RHS.
m4_define([b4_rhs_value],
[yyvsp@<:@m4_eval([$2 - $1])@:>@m4_ifval([$3], [.$3])])
# b4_lhs_location()
# -----------------
# Expansion of @$.
m4_define([b4_lhs_location],
[yyloc])
# b4_rhs_location(RULE-LENGTH, NUM)
# ---------------------------------
# Expansion of @NUM, where the current rule has RULE-LENGTH symbols
# on RHS.
m4_define([b4_rhs_location],
[yylsp@<:@m4_eval([$2 - $1])@:>@])
m4_define_default([b4_input_suffix], [.y])
m4_define_default([b4_output_parser_suffix],