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diff --git a/src/language/expressions/operations.h.pl b/src/language/expressions/operations.h.pl
new file mode 100644
index 00000000..d43a5021
--- /dev/null
+++ b/src/language/expressions/operations.h.pl
@@ -0,0 +1,54 @@
+do 'generate.pl';
+
+sub generate_output {
+    print "#include <stdlib.h>\n";
+    print "#include <stdbool.h>\n\n";
+
+    print "typedef enum";
+    print "  {\n";
+    my (@atoms);
+    foreach my $type (@types) {
+	next if $type->{ROLE} eq 'fixed';
+	push (@atoms, "OP_$type->{NAME}");
+    }
+    print_operations ('atom', 1, \@atoms);
+    print_operations ('function', "OP_atom_last + 1", \@funcs);
+    print_operations ('operator', "OP_function_last + 1", \@opers);
+    print_range ("OP_composite", "OP_function_first", "OP_operator_last");
+    print ",\n\n";
+    print_range ("OP", "OP_atom_first", "OP_composite_last");
+    print "\n  }\n";
+    print "operation_type, atom_type;\n";
+
+    print_predicate ('is_operation', 'OP');
+    print_predicate ("is_$_", "OP_$_")
+	foreach qw (atom composite function operator);
+}
+
+sub print_operations {
+    my ($type, $first, $names) = @_;
+    print "    /* \u$type types. */\n";
+    print "    $names->[0] = $first,\n";
+    print "    $_,\n" foreach @$names[1...$#{$names}];
+    print_range ("OP_$type", $names->[0], $names->[$#{$names}]);
+    print ",\n\n";
+}
+
+sub print_range {
+    my ($prefix, $first, $last) = @_;
+    print "    ${prefix}_first = $first,\n";
+    print "    ${prefix}_last = $last,\n";
+    print "    ${prefix}_cnt = ${prefix}_last - ${prefix}_first + 1";
+}
+
+sub print_predicate {
+    my ($function, $category) = @_;
+    my ($assertion) = "";
+
+    print "\nstatic inline bool\n";
+    print "$function (operation_type op)\n";
+    print "{\n";
+    print "  assert (is_operation (op));\n" if $function ne 'is_operation';
+    print "  return op >= ${category}_first && op <= ${category}_last;\n";
+    print "}\n";
+}