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sqlm-postgres-macros 0.1.0

macros for `sqlm-postgres`
Documentation 
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#![cfg_attr(nightly_column_names, feature(adt_const_params))]
#![cfg_attr(nightly_column_names, allow(incomplete_features))]

mod enum_derive;
mod from_row_derive;
mod parser;
mod rename;
mod sql;

use proc_macro::TokenStream;
use syn::parse_macro_input;

#[proc_macro_derive(FromRow, attributes(sqlm))]
pub fn derive_fromsql(input: TokenStream) -> TokenStream {
    let input = parse_macro_input!(input);

    from_row_derive::expand_derive_from_row(input)
        .unwrap_or_else(|e| e.to_compile_error())
        .into()
}

#[proc_macro_derive(Enum)]
pub fn derive_enum(input: TokenStream) -> TokenStream {
    let input = parse_macro_input!(input);

    enum_derive::expand_derive_enum(input)
        .unwrap_or_else(|e| e.to_compile_error())
        .into()
}

#[proc_macro]
pub fn sql(item: TokenStream) -> TokenStream {
    sql::sql(item)
}

#[cfg(not(nightly_column_names))]
fn const_name(name: &str) -> usize {
    use std::collections::hash_map::DefaultHasher;
    use std::hash::{Hash, Hasher};
    let mut hasher = DefaultHasher::default();
    name.hash(&mut hasher);
    hasher.finish() as usize
}

#[cfg(nightly_column_names)]
fn const_name(name: &str) -> &str {
    name
}