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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| use proc_macro2::{Ident, TokenStream, TokenTree}; | ||
| use quote::{quote, ToTokens}; | ||
| use std::iter::FromIterator; | ||
| use syn::parse::{Parse, ParseBuffer, ParseStream}; | ||
| use syn::punctuated::Punctuated; | ||
| use syn::Token; | ||
| use syn::{braced, Expr}; | ||
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|
||
| #[derive(Debug)] | ||
| pub struct PyDictLiteral { | ||
| pub py: Ident, | ||
| pub items: Vec<KeyValue>, | ||
| } | ||
|
|
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| #[derive(Debug)] | ||
| pub struct KeyValue { | ||
| key: syn::Expr, | ||
| sep: Token![:], | ||
| value: syn::Expr, | ||
| } | ||
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|
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| #[derive(Debug)] | ||
| struct Key(syn::Expr); | ||
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| impl Parse for Key { | ||
| fn parse(input: ParseStream) -> syn::Result<Self> { | ||
| let mut tokens = vec![]; | ||
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|
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| while !input.peek(Token![:]) || input.peek(Token![::]) { | ||
| let tt = input.parse::<TokenTree>()?; | ||
| tokens.push(tt); | ||
| } | ||
| let stream = TokenStream::from_iter(tokens.into_iter()); | ||
|
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| let expr = syn::parse2::<Expr>(stream)?; | ||
| Ok(Self(expr)) | ||
| } | ||
| } | ||
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| impl Parse for KeyValue { | ||
| fn parse(input: ParseStream) -> syn::Result<Self> { | ||
| let key: Key = input.parse()?; | ||
| let sep: Token![:] = input.parse()?; | ||
| let value: syn::Expr = input.parse()?; | ||
|
|
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| Ok(Self { | ||
| key: key.0, | ||
| sep, | ||
| value, | ||
| }) | ||
| } | ||
| } | ||
|
|
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| impl Parse for PyDictLiteral { | ||
| fn parse(input: ParseStream) -> syn::Result<Self> { | ||
| let py: Ident = input.parse()?; | ||
| let _arrow: Token![=>] = input.parse()?; | ||
|
|
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| let body: ParseBuffer; | ||
| braced!(body in input); | ||
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| let items: Punctuated<KeyValue, Token![,]> = Punctuated::parse_terminated(&body)?; | ||
|
|
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| Ok(Self { | ||
| py, | ||
| items: items.into_iter().collect(), | ||
| }) | ||
| } | ||
| } | ||
|
|
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| impl ToTokens for KeyValue { | ||
| fn to_tokens(&self, tokens: &mut TokenStream) { | ||
| let key = &self.key; | ||
| let value = &self.value; | ||
| let ts = quote! {(#key, #value)}; | ||
| tokens.extend(ts); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| use pyo3::prelude::*; | ||
| use pyo3::{py_dict, py_run, py_tuple}; | ||
|
|
||
| #[test] | ||
| fn test_dict_literal() { | ||
| let gil = Python::acquire_gil(); | ||
| let py = gil.python(); | ||
|
|
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| let dict = py_dict!(py => {"key": "value"}).expect("failed to create dict"); | ||
| assert_eq!( | ||
| "value", | ||
| dict.get_item("key").unwrap().extract::<String>().unwrap() | ||
| ); | ||
|
|
||
| let value = "value"; | ||
| let multi_elem_dict = | ||
| py_dict!(py => {"key1": value, 143: "abcde"}).expect("failed to create dict"); | ||
| assert_eq!( | ||
| "value", | ||
| multi_elem_dict | ||
| .get_item("key1") | ||
| .unwrap() | ||
| .extract::<&str>() | ||
| .unwrap() | ||
| ); | ||
| assert_eq!( | ||
| "abcde", | ||
| multi_elem_dict | ||
| .get_item(143) | ||
| .unwrap() | ||
| .extract::<&str>() | ||
| .unwrap() | ||
| ); | ||
|
|
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| let keys = &["key1", "key2"]; | ||
|
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| let expr_dict = | ||
| py_dict!(py => { keys[0]: "value1", keys[1]: "value2", 3-7: py_tuple!(py, ("elem1", "elem2", 3)) }) | ||
| .expect("failed to create dict"); | ||
|
|
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| py_run!( | ||
| py, | ||
| expr_dict, | ||
| "assert expr_dict == {'key1': 'value1', 'key2': 'value2', -4: ('elem1', 'elem2', 3)}" | ||
| ); | ||
| } |