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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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12
data/lalr1.cc
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@@ -50,9 +50,9 @@ m4_copy([b4_symbol_value], [b4_symbol_value_template])
m4_append([b4_value_type_setup_union],
[m4_copy_force([b4_symbol_value_union], [b4_symbol_value_template])])
# b4_lhs_value(SYMBOL-NUM, SYMBOL-NUM, [TYPE])
# --------------------------------------------
# Expansion of $$ or $<TYPE>$, for symbol SYMBOL-NUM.
# b4_lhs_value(SYMBOL-NUM, [TYPE])
# --------------------------------
# See README.
m4_define([b4_lhs_value],
[b4_symbol_value([yylhs.value], [$1], [$2])])
@@ -66,8 +66,7 @@ m4_define([b4_lhs_location],
# b4_rhs_data(RULE-LENGTH, POS)
# -----------------------------
# Return the data corresponding to the symbol #POS, where the current
# rule has RULE-LENGTH symbols on RHS.
# See README.
m4_define([b4_rhs_data],
[yystack_@{b4_subtract($@)@}])
@@ -82,8 +81,7 @@ m4_define([b4_rhs_state],
# b4_rhs_value(RULE-LENGTH, POS, SYMBOL-NUM, [TYPE])
# --------------------------------------------------
# Expansion of $<TYPE>POS, where the current rule has RULE-LENGTH
# symbols on RHS.
# See README.
m4_define([_b4_rhs_value],
[b4_symbol_value([b4_rhs_data([$1], [$2]).value], [$3], [$4])])