generate_value.py

#!/usr/bin/env python

from gotypes import types, imports, imports_stringer

res = "// Code generated by generate_value.py; DO NOT EDIT.\n"
res += "\n"
res += "package cli\n"
res += "\n"
res += "import (\n"
for pkg in sorted(imports + imports_stringer):
    res += "\t\"%s\"\n" % pkg
res += ")\n"

for (typ, name, stringer, emptier) in types:
    safe_typ = typ.replace(".", "")

    res += "\n"
    res += "// %s\n" % typ
    res += "\n"
    res += "var (\n"
    res += "\t_ Value   = (*%sValue)(nil)\n" % safe_typ
    res += "\t_ Getter  = (*%sValue)(nil)\n" % safe_typ
    res += "\t_ Emptier = (*%sValue)(nil)\n" % safe_typ
    res += "\t_ Typer   = (*%sValue)(nil)\n" % safe_typ
    res += ")\n"
    res += "\n"
    res += "type %sValue %s\n" % (safe_typ, typ)
    res += "\n"
    res += "func new%sValue(p *%s) *%sValue {\n" % (name, typ, safe_typ)
    res += "\treturn (*%sValue)(p)\n" % safe_typ
    res += "}\n"
    res += "\n"
    res += "func (v *%sValue) Get() interface{} { return %s(*v) }\n" % (safe_typ, typ)
    res += "\n"
    res += "func (v *%sValue) Empty() bool { return %s }\n" % (safe_typ, (emptier % "v"))
    res += "\n"
    res += "func (v *%sValue) String() string { return %s }\n" % (safe_typ, (stringer % "v"))
    res += "\n"
    res += "func (*%sValue) Type() string { return \"%s\" }\n" % (safe_typ, typ)

with open("./value_gen.go", "w") as f:
    f.write(res)