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cleanup the api

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This commit is contained in:
Aleksey Kladov 2019-01-31 22:14:28 +03:00
parent a16f6bb27d
commit b4b522fb39
3 changed files with 70 additions and 56 deletions
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50
crates/ra_mbe/src/syntax_bridge.rs
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@ -1,8 +1,7 @@
use ra_syntax::{ast, AstNode, SyntaxNode, SyntaxKind::*};
pub fn macro_call_to_tt(call: &ast::MacroCall) -> Option<tt::Subtree> {
let tt = call.token_tree()?;
convert_tt(tt.syntax())
pub fn ast_to_token_tree(ast: &ast::TokenTree) -> Option<tt::Subtree> {
convert_tt(ast.syntax())
}
fn convert_tt(tt: &SyntaxNode) -> Option<tt::Subtree> {
@ -66,48 +65,3 @@ fn convert_tt(tt: &SyntaxNode) -> Option<tt::Subtree> {
};
Some(res)
}
#[test]
fn test_convert_tt() {
let macro_definition = r#"
macro_rules! impl_froms {
($e:ident: $($v:ident),*) => {
$(
impl From<$v> for $e {
fn from(it: $v) -> $e {
$e::$v(it)
}
}
)*
}
}
"#;
let macro_invocation = r#"
impl_froms!(TokenTree: Leaf, Subtree);
"#;
let source_file = ast::SourceFile::parse(macro_definition);
let macro_definition = source_file
.syntax()
.descendants()
.find_map(ast::MacroCall::cast)
.unwrap();
let source_file = ast::SourceFile::parse(macro_invocation);
let macro_invocation = source_file
.syntax()
.descendants()
.find_map(ast::MacroCall::cast)
.unwrap();
let definition_tt = macro_call_to_tt(macro_definition).unwrap();
let invocation_tt = macro_call_to_tt(macro_invocation).unwrap();
let mbe = crate::parse(&definition_tt).unwrap();
let expansion = crate::exapnd(&mbe, &invocation_tt).unwrap();
assert_eq!(
expansion.to_string(),
"impl From < Leaf > for TokenTree {fn from (it : Leaf) -> TokenTree {TokenTree :: Leaf (it)}} \
impl From < Subtree > for TokenTree {fn from (it : Subtree) -> TokenTree {TokenTree :: Subtree (it)}}"
)
}