kosame_dsl 0.3.0

Macro-based Rust ORM focused on developer ergonomics
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67

use crate::{
    inferred_type::InferredType,
    pretty::{PrettyPrint, Printer},
    scopes::ScopeId,
};

use super::Visit;
use proc_macro2::{Span, TokenStream};
use quote::{ToTokens, quote};
use syn::{
    Ident, Token,
    parse::{Parse, ParseStream},
};

pub struct BindParam {
    pub colon_token: Token![:],
    pub name: Ident,
}

impl BindParam {
    #[must_use]
    pub fn infer_name(&self) -> Option<&Ident> {
        Some(&self.name)
    }

    #[must_use]
    pub fn infer_type(&self, _scope_id: ScopeId) -> Option<InferredType<'_>> {
        None
    }

    pub fn peek(input: ParseStream) -> bool {
        input.peek(Token![:])
    }

    #[must_use]
    pub fn span(&self) -> Span {
        self.colon_token
            .span
            .join(self.name.span())
            .unwrap_or(self.name.span())
    }
}

pub fn visit_bind_param<'a>(_visit: &mut (impl Visit<'a> + ?Sized), _bind_param: &'a BindParam) {}

impl Parse for BindParam {
    fn parse(input: ParseStream) -> syn::Result<Self> {
        Ok(Self {
            colon_token: input.parse()?,
            name: input.parse()?,
        })
    }
}

impl ToTokens for BindParam {
    fn to_tokens(&self, tokens: &mut TokenStream) {
        let name = &self.name;
        quote! { params::#name::BIND_PARAM }.to_tokens(tokens);
    }
}

impl PrettyPrint for BindParam {
    fn pretty_print(&self, printer: &mut Printer) {
        self.colon_token.pretty_print(printer);
        self.name.pretty_print(printer);
    }
}