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df338396cd
This is a backport cherry-pick of commits 165156beeb2926472bbceca3c103aacc3f81a8cc cce974e8ea992d0e6d2f649eca7880b436d91d71 from the v3.0 branch as we need symbol hashes directly inside their scopes for more general usage than before. The redefinable keywords must be specified in any .Y file as follows: toksym: THE_KEYWORD ;
68 lines
1.8 KiB
Plaintext
68 lines
1.8 KiB
Plaintext
m4_divert(-1)m4_dnl
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#
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# BIRD -- Generator of Configuration Grammar
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#
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# (c) 1998--1999 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
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#
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# Can be freely distributed and used under the terms of the GNU GPL.
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#
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# Diversions used:
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# 1 includes
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# 2 types etc.
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# 3 rules
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# 4 C code
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# Common aliases
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m4_define(DNL, `m4_dnl')
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# Define macros for defining sections
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m4_define(CF_ZONE, `m4_divert($1)/* $2 from m4___file__ */')
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m4_define(CF_HDR, `CF_ZONE(1, Headers)')
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m4_define(CF_DEFINES, `CF_ZONE(1, Defines)')
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m4_define(CF_DECLS, `CF_ZONE(2, Declarations)')
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m4_define(CF_GRAMMAR, `CF_ZONE(3, Grammar)')
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m4_define(CF_CODE, `CF_ZONE(4, C Code)')
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m4_define(CF_END, `m4_divert(-1)')
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# Simple iterator
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m4_define(CF_itera, `m4_ifelse($#, 1, [[CF_iter($1)]], [[CF_iter($1)[[]]CF_itera(m4_shift($@))]])')
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m4_define(CF_iterate, `m4_define([[CF_iter]], m4_defn([[$1]]))CF_itera($2)')
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# Keywords act as %token<s>
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m4_define(CF_keywd, `m4_ifdef([[CF_tok_$1]],,[[m4_define([[CF_tok_$1]],1)m4_define([[CF_toks]],CF_toks $1)]])')
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m4_define(CF_KEYWORDS, `m4_define([[CF_toks]],[[]])CF_iterate([[CF_keywd]], [[$@]])m4_ifelse(CF_toks,,,%token<s>[[]]CF_toks
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)DNL')
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# CLI commands
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m4_define(CF_CLI, `m4_define([[CF_cmd]], cmd_[[]]m4_translit($1, [[ ]], _))DNL
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m4_divert(2)CF_KEYWORDS(m4_translit($1, [[ ]], [[,]]))
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m4_divert(3)cli_cmd: CF_cmd
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CF_cmd: $1 $2 END')
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m4_define(CF_CLI_CMD, `')
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m4_define(CF_CLI_HELP, `')
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# ENUM declarations are ignored
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m4_define(CF_ENUM, `')
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m4_define(CF_ENUM_PX, `')
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# After all configuration templates end, we finally generate the grammar file.
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m4_m4wrap(`
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m4_divert(0)DNL
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%{
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m4_undivert(1)DNL
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%}
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m4_undivert(2)DNL
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%%
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m4_undivert(3)DNL
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%%
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m4_undivert(4)DNL
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')
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# As we are processing C source, we must access all M4 primitives via
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# m4_* and also set different quoting convention: `[[' and ']]'
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m4_changequote([[,]])
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