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nikomatsakis 2022-08-21 10:24:24 +00:00
parent f01db459c5
commit 661232845e
9 changed files with 342 additions and 92 deletions
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77
tutorial/debug.html
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@ -169,7 +169,7 @@ This is tedious but not difficult. Here is an example of implementing the trait
</span><span class="boring">fn main() {
</span>impl DebugWithDb&lt;dyn crate::Db + '_&gt; for Expression {
fn fmt(&amp;self, f: &amp;mut std::fmt::Formatter&lt;'_&gt;, db: &amp;dyn crate::Db) -&gt; std::fmt::Result {
match self.data(db) {
match &amp;self.data {
ExpressionData::Op(a, b, c) =&gt; f
.debug_tuple(&quot;ExpressionData::Op&quot;)
.field(&amp;a.debug(db)) // use `a.debug(db)` for interned things
@ -219,16 +219,29 @@ impl DebugWithDb&lt;dyn crate::Db + '_&gt; for Diagnostic {
pub struct Function {
#[id]
name: FunctionId,
name_span: Span,
#[return_ref]
args: Vec&lt;VariableId&gt;,
#[return_ref]
body: Expression,
}
#[salsa::tracked]
pub struct Span {
pub start: usize,
pub end: usize,
}
#[salsa::accumulator]
pub struct Diagnostics(Diagnostic);
#[derive(Clone, Debug)]
#[derive(new, Clone, Debug)]
pub struct Diagnostic {
pub position: usize,
pub start: usize,
pub end: usize,
pub message: String,
}
<span class="boring">}
@ -271,21 +284,53 @@ fn parse_print() {
let actual = parse_string(&quot;print 1 + 2&quot;);
let expected = expect_test::expect![[r#&quot;
(
[
ExpressionData::Op(
Number(
OrderedFloat(
1.0,
Program {
statements: [
Statement {
span: Span(
Id {
value: 5,
},
),
),
Add,
Number(
OrderedFloat(
2.0,
data: Print(
Expression {
span: Span(
Id {
value: 4,
},
),
data: Op(
Expression {
span: Span(
Id {
value: 1,
},
),
data: Number(
OrderedFloat(
1.0,
),
),
},
Add,
Expression {
span: Span(
Id {
value: 3,
},
),
data: Number(
OrderedFloat(
2.0,
),
),
},
),
},
),
),
),
],
},
],
},
[],
)&quot;#]];
expected.assert_eq(&amp;actual);