func composeString(expr *ast.Expr) (funcs.String, error) {
uniq, err := prep(expr, types.SINGLE_STRING)
if err != nil {
return nil, err
}
if expr.Terminal != nil {
if expr.GetTerminal().Variable != nil {
return funcs.NewStringVariable(), nil
} else {
return funcs.NewConstString(expr.GetTerminal().GetStringValue()), nil
}
}
values, err := newValues(expr.GetFunction().GetParams())
if err != nil {
return nil, err
}
return funcs.NewStringFunc(uniq, values...)
}
func composeVariable(v *ast.Variable) funcs.Variable {
switch v.Type {
case types.SINGLE_DOUBLE:
return funcs.NewFloat64Variable()
case types.SINGLE_FLOAT:
return funcs.NewFloat32Variable()
case types.SINGLE_INT64:
return funcs.NewInt64Variable()
case types.SINGLE_UINT64:
return funcs.NewUint64Variable()
case types.SINGLE_INT32:
return funcs.NewInt32Variable()
case types.SINGLE_BOOL:
return funcs.NewBoolVariable()
case types.SINGLE_STRING:
return funcs.NewStringVariable()
case types.SINGLE_BYTES:
return funcs.NewBytesVariable()
case types.SINGLE_UINT32:
return funcs.NewUint32Variable()
}
panic("unreachable")
}