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skeletons: start some technical documentation

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* data/README: Convert to Markdown.
Start documenting some of the macros used in all our skeletons.
Simplify and fix the documentation of the macros in the skeletons.
This commit is contained in:
Akim Demaille
2018-12-04 06:53:36 +01:00
parent f539a56620
commit 999277ddd8
9 changed files with 125 additions and 106 deletions
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9
data/yacc.c
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@@ -130,15 +130,14 @@ m4_define([b4_int_type],
# b4_lhs_value(SYMBOL-NUM, [TYPE])
# --------------------------------
# Expansion of $$ or $<TYPE>$, for symbol SYMBOL-NUM.
# See README.
m4_define([b4_lhs_value],
[b4_symbol_value(yyval, [$1], [$2])])
# b4_rhs_value(RULE-LENGTH, POS, SYMBOL-NUM, [TYPE])
# --------------------------------------------------
# Expansion of $<TYPE>POS, where the current rule has RULE-LENGTH
# symbols on RHS.
# b4_rhs_value(RULE-LENGTH, POS, [SYMBOL-NUM], [TYPE])
# ----------------------------------------------------
# See README.
m4_define([b4_rhs_value],
[b4_symbol_value([yyvsp@{b4_subtract([$2], [$1])@}], [$3], [$4])])