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extended pattern matching

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This commit is contained in:
llogiq 2015-09-02 01:36:37 +02:00
parent 08fb953e1a
commit 1ab733cfa1
1 changed files with 8 additions and 9 deletions
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17
src/shadow.rs
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@ -60,7 +60,7 @@ fn check_decl(cx: &Context, decl: &Decl, bindings: &mut Vec<Name>) {
if let DeclLocal(ref local) = decl.node {
let Local{ ref pat, ref ty, ref init, id: _, span } = **local;
if let &Some(ref t) = ty { check_ty(cx, t, bindings) }
if let &Some(ref o) = init {
if let &Some(ref o) = init {
check_expr(cx, o, bindings);
check_pat(cx, pat, &Some(o), span, bindings);
} else {
@ -92,10 +92,9 @@ fn check_pat(cx: &Context, pat: &Pat, init: &Option<&Expr>, span: Span,
if let Some(ref p) = *inner { check_pat(cx, p, init, span, bindings); }
},
//PatEnum(Path, Option<Vec<P<Pat>>>),
PatStruct(_, ref pfields, _) =>
if let Some(ref init_struct) = *init { // TODO follow
if let ExprStruct(_, ref efields, ref _base) = init_struct.node {
// TODO: follow base
PatStruct(_, ref pfields, _) =>
if let Some(ref init_struct) = *init {
if let ExprStruct(_, ref efields, _) = init_struct.node {
for field in pfields {
let ident = field.node.ident;
let efield = efields.iter()
@ -105,7 +104,7 @@ fn check_pat(cx: &Context, pat: &Pat, init: &Option<&Expr>, span: Span,
}
} else {
for field in pfields {
check_pat(cx, &field.node.pat, &None, span, bindings);
check_pat(cx, &field.node.pat, init, span, bindings);
}
}
} else {
@ -114,14 +113,14 @@ fn check_pat(cx: &Context, pat: &Pat, init: &Option<&Expr>, span: Span,
}
},
PatTup(ref inner) =>
if let Some(ref init_tup) = *init { //TODO: follow
if let Some(ref init_tup) = *init {
if let ExprTup(ref tup) = init_tup.node {
for (i, p) in inner.iter().enumerate() {
for (i, p) in inner.iter().enumerate() {
check_pat(cx, p, &Some(&tup[i]), p.span, bindings);
}
} else {
for p in inner {
check_pat(cx, p, &None, span, bindings);
check_pat(cx, p, init, span, bindings);
}
}
} else {