Add constants and primitive type readonly attributes to Python IDL compiler

Source/bindings/templates/constants.cpp

+{# FIXME: remove all the conditional_string blocks once test removed #}
+{# FIXME: should use reflected_name instead of name #}
+{% macro class_constants() %}

[haraken, 2013/08/26 09:33:40]

I think you can remove class_constants() and move the contents to
install_constants(). Just like runtime enabled constants, you can define normal
constants just before installing the constants.

[Nils Barth (inactive), 2013/08/27 02:59:27]

Got it; it's just a variable used in the installConstants call.
It's a bit messy to rearrange the Perl, so I'll do this in a followup.

+static const V8DOMConfiguration::ConstantConfiguration {{v8_class_name}}Constants[] = {
+{% for constant in constants %}
+{% if not constant.enabled_at_runtime %}
+{% if constant.conditional_string %}
+#if {{constant.conditional_string}}
+{% endif %}
+    {"{{constant.name}}", {{constant.value}}},
+{% if constant.conditional_string %}
+#endif // {{constant.conditional_string}}
+{% endif %}
+{% endif %}{# not constant.enabled_at_runtime #}
+{% endfor %}
+};
+{% if not do_not_check_constants %}
+
+{% for constant in constants %}
+{% if constant.conditional_string %}
+#if {{constant.conditional_string}}
+{% endif %}
+{# FIXME
+{{cpp_class_name}}Enum{{constant.name_reflect}}IsWrongUseDoNotCheckConstants
+=>
+TheValueOf{{cpp_class_name}}::{{constant.name_reflect}}Doesn'tMatchWithImplementation
+#}
+COMPILE_ASSERT({{constant.value}} == {{cpp_class_name}}::{{constant.reflected_name}}, {{cpp_class_name}}Enum{{constant.reflected_name}}IsWrongUseDoNotCheckConstants);
+{% if constant.conditional_string %}
+#endif // {{constant.conditional_string}}
+{% endif %}
+{% endfor %}
+{% endif %}{# not do_not_check_constants #}
+{% endmacro %}
+
+
+{##############################################################################}
+{% macro constant_configuration(constant) %}

[haraken, 2013/08/26 09:33:40]

constant_configuration => install_runtime_enabled_constants (for consistency
with install_constants below)

Also, you can pass 'constants' (instead of 'constant') and write the for loop in
the macro.

[Nils Barth (inactive), 2013/08/27 02:59:27]

Actually merged into install_constants!
In this case this works, because we can wrap the call site in {% if constants
%};
I rearranged Perl slightly.

In general it's tricky though:
As a subtle Jinja issue, we can't just have a possibly-blank macro on a line by
itself,
as then in *always* generates a newline:
{{foo}}
{{bar}}
{{zork}}
...has 3 newlines, and if the macro is blank, you just get blank lines (this
causes lots of noise).
There's auto-newline stripping around blocks though, so:
{% if foo %}{{bar(foo)}}{% endif %}
or:
{% if foo %}
{{bar(foo)}}
{% endif %}
work (no noise), which is why we have that everywhere.
Same issue with:
{% for constant in constants %}{{constant_configuration(constant)}}{% endfor %}

+{% if constant.enabled_at_runtime %}
+{% if constant.conditional_string %}
+#if {{constant.conditional_string}}
+{% endif %}
+    if ({{constant.enable_function}}()) {
+        static const V8DOMConfiguration::ConstantConfiguration constantConfiguration = {"{{constant.name}}", static_cast<signed int>({{constant.value}})};
+        V8DOMConfiguration::installConstants(desc, proto, &constantConfiguration, 1, isolate);
+    }
+{% if constant.conditional_string %}
+#endif // {{constant.conditional_string}}
+{%- endif %}
+{% endif %}
+{% endmacro %}
+
+
+{##############################################################################}
+{% macro install_constants() %}
+V8DOMConfiguration::installConstants(desc, proto, {{v8_class_name}}Constants, WTF_ARRAY_LENGTH({{v8_class_name}}Constants), isolate);
+{%- endmacro %}