doc/check-docs: Add a program to check that the right things are documented.

How do you think I managed to find all of the problems I just fixed? ;-)

diff --git a/doc/check-docs b/doc/check-docs
new file mode 100755 (executable)
index 0000000..06bb539
--- /dev/null
+++ b/doc/check-docs
@@ -0,0 +1,119 @@
+#! /usr/bin/perl
+
+use autodie;
+
+my %LABEL;
+
+sub scansyms (\%$) {
+  my ($labels, $f) = @_;
+  my $st = LIMBO;
+  my $func = undef;
+  my $file = undef;
+  open my $fh, "<", $f;
+  while (<$fh>) {
+    chomp;
+    if (/^---/) { $st = NEWPKG; }
+    elsif ($st eq NEWPKG && /^Package `[-\w]+'/) { $st = LIST; }
+    elsif ($st eq LIST && /^Classes:/) { $st = LIMBO; }
+    elsif ($st eq LIMBO && /^Methods:/) { $st = METHODS; }
+    elsif (/^\s*$/) { }
+    elsif ($st eq LIMBO) { }
+    elsif (/^([-\w]+\.lisp)$/) { $file = $1; }
+    elsif ($st eq LIST) {
+      my @F = split;
+      (my $sym = shift @F) =~ s/^(.+)://;
+      $labels->{"sym:$sym"} = 1 unless @F;
+      for my $t (@F) {
+       if ($t eq 'constant') { $labels->{"const:$sym"} = $file; }
+       elsif ($t eq 'variable') { $labels->{"var:$sym"} = $file; }
+       elsif ($t eq 'macro') { $labels->{"mac:$sym"} = $file; }
+       elsif ($t eq 'function') { $labels->{"fun:$sym"} = $file; }
+       elsif ($t eq 'setf-function') { $labels->{"fun:setf/$sym"} = $file; }
+       elsif ($t eq 'generic') { $labels->{"gf:$sym"} = $file; }
+       elsif ($t eq 'setf-generic') { $labels->{"gf:setf/$sym"} = $file; }
+       elsif ($t eq 'class') { $labels->{"cls:$sym"} = $file; }
+       elsif ($t eq 'c-type-spec') { $labels->{"cty:$sym"} = $file; }
+       elsif ($t eq 'c-type-form') { $labels->{"cty:$sym"} = $file; }
+       elsif ($t eq 'parser-spec') { $labels->{"parse:$sym"} = $file; }
+       elsif ($t eq 'parser-form') { $labels->{"parseform:$sym"} = $file; }
+       elsif ($t eq 'opthandler') { $labels->{"opt:$sym"} = $file; }
+       elsif ($t eq 'optmacro') { $labels->{"optmac:$sym"} = $file; }
+       else { die "unknown symbol category `$t'"; }
+      }
+    }
+  }
+  close $fh;
+}
+
+my %DEF = map { $_ => 1 }
+  "cls:array", "cls:class", "cls:error", "cls:float", "cls:function",
+  "cls:list", "cls:string",
+  "const:nil",
+  "fun:*", "fun:char", "fun:setf/char", "fun:error", "fun:float",
+  "fun:function", "fun:list", "fun:not", "fun:read",
+  "fun:schar", "fun:setf/schar", "fun:string", "fun:set", "fun:union",
+  "mac:and", "mac:or",
+  "var:*";
+my %CAT = map { $_ => 1 }
+  'sym', 'const', 'var', 'mac', 'fun', 'gf', 'cls', 'modvar', 'const',
+  'meth', 'ar-meth', 'be-meth', 'af-meth',
+  'msg', 'feat',
+  'rst', 'ty', 'lmac', 'parse', 'parseform', 'opt', 'optmac', 'plug';
+
+my $AUXDIR = "build/doc/";
+
+sub scanaux (\%$) {
+  my ($def, $f) = @_;
+  (my $s = $f) =~ s/\.aux$/.tex/;
+  open my $fh, "<", "$AUXDIR$f";
+  while (<$fh>) {
+    chomp;
+    if (/^\\\@input\{([^}]*\.aux)\}$/) { scanaux($def, $1); }
+    elsif (/^\\newlabel\{([^:]+):([^}]+)\}/ && $CAT{$1})
+      { $def->{"$1:$2"} = $s; }
+  }
+  close $fh;
+}
+
+scansyms %LABEL, "doc/SYMBOLS";
+scanaux %DEF, "sod.aux";
+
+SYM: for my $sym (sort keys %LABEL) {
+  if ($DEF{$sym}) { next SYM; }
+  my ($tag, $name) = $sym =~ /^([^:]+):(.*)$/;
+  if ($tag eq "cls" && $DEF{"ty:$name"}) { }
+  elsif ($tag eq "gf" && $DEF{"fun:$name"}) { }
+  elsif ($tag eq "var" && $DEF{"const:$name"}) { }
+  elsif ($tag eq "sym" && $DEF{"plug:$name"}) { }
+  elsif ($tag eq "sym" && $DEF{"lmac:$name"}) { }
+  elsif ($sym eq "sym:alignas" && $DEF{"cls:alignas-storage-specifier"}) { }
+  elsif ($sym eq "fun:main" && $DEF{"fun:sod-frontend:main"}) { }
+  elsif ($sym eq "fun:augment-options" &&
+        $DEF{"fun:sod-frontend:augment-options"}) { }
+  elsif ($sym eq "gf:setf/generic-function-methods") { }
+  elsif ($tag eq "cty") { }
+  else { print ";; missing $tag:$name (defined in $LABEL{$sym})\n"; }
+}
+
+SYM: for my $sym (sort keys %DEF) {
+  if ($LABEL{$sym}) { next SYM; }
+  my ($tag, $name) = $sym =~ /^([^:]+):(.*)$/;
+  if ($tag eq "ty" && $LABEL{"cls:$name"}) { }
+  elsif ($tag eq "const" && $LABEL{"var:$name"}) { }
+  elsif ($tag eq "fun" && $LABEL{"gf:$name"}) { }
+  elsif ($DEF{$sym} eq "runtime.tex") { }
+  elsif ($DEF{$sym} eq "structures.tex") { }
+  elsif ($sym eq "lmac:parse") { }
+  elsif ($sym eq "rst:noted") { }
+  elsif ($tag eq "meth" || $tag eq "ar-meth" ||
+        $tag eq "be-meth" || $tag eq "af-meth") { }
+  elsif ($sym eq "parse::any" || $sym eq "parse::eof" ||
+        $sym eq "parse::whitespace" || $sym eq "parse:atom" ||
+        $sym eq "parse:char" || $sym eq "parse:string" ||
+        $sym eq "parse:t" || $sym eq "parseform:t" ||
+        $sym eq "parseform:when") { }
+  elsif ($sym eq "plug:class-item" || $sym eq "plug:module") { }
+  elsif ($sym eq "sym:int") { }
+  elsif ($name =~ /^sod-frontend:(.*)$/ && $LABEL{"$tag:$1"}) { }
+  else { print ";; unexpected $tag:$name (described in $DEF{$sym})\n"; }
+}