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syntax: parse fully qualified UFCS expressions.

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This commit is contained in:
Eduard Burtescu 2015-01-13 06:03:12 +02:00
parent 2cdc86c180
commit b51026e09c
1 changed files with 37 additions and 7 deletions
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44
src/libsyntax/parse/parser.rs
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@ -25,7 +25,7 @@ use ast::{ExprAssign, ExprAssignOp, ExprBinary, ExprBlock, ExprBox};
use ast::{ExprBreak, ExprCall, ExprCast};
use ast::{ExprField, ExprTupField, ExprClosure, ExprIf, ExprIfLet, ExprIndex};
use ast::{ExprLit, ExprLoop, ExprMac, ExprRange};
use ast::{ExprMethodCall, ExprParen, ExprPath};
use ast::{ExprMethodCall, ExprParen, ExprPath, ExprQPath};
use ast::{ExprRepeat, ExprRet, ExprStruct, ExprTup, ExprUnary};
use ast::{ExprVec, ExprWhile, ExprWhileLet, ExprForLoop, Field, FnDecl};
use ast::{FnUnboxedClosureKind, FnMutUnboxedClosureKind};
@ -1573,7 +1573,10 @@ impl<'a> Parser<'a> {
TyQPath(P(QPath {
self_type: self_type,
trait_ref: P(trait_ref),
item_name: item_name,
item_path: ast::PathSegment {
identifier: item_name,
parameters: ast::PathParameters::none()
}
}))
} else if self.check(&token::ModSep) ||
self.token.is_ident() ||
@ -1894,11 +1897,7 @@ impl<'a> Parser<'a> {
if !self.eat(&token::ModSep) {
segments.push(ast::PathSegment {
identifier: identifier,
parameters: ast::AngleBracketedParameters(ast::AngleBracketedParameterData {
lifetimes: Vec::new(),
types: OwnedSlice::empty(),
bindings: OwnedSlice::empty(),
})
parameters: ast::PathParameters::none()
});
return segments;
}
@ -2253,6 +2252,37 @@ impl<'a> Parser<'a> {
hi = self.last_span.hi;
}
_ => {
if self.eat_lt() {
// QUALIFIED PATH `<TYPE as TRAIT_REF>::item::<'a, T>`
let self_type = self.parse_ty_sum();
self.expect_keyword(keywords::As);
let trait_ref = self.parse_trait_ref();
self.expect(&token::Gt);
self.expect(&token::ModSep);
let item_name = self.parse_ident();
let parameters = if self.eat(&token::ModSep) {
self.expect_lt();
// Consumed `item::<`, go look for types
let (lifetimes, types, bindings) =
self.parse_generic_values_after_lt();
ast::AngleBracketedParameters(ast::AngleBracketedParameterData {
lifetimes: lifetimes,
types: OwnedSlice::from_vec(types),
bindings: OwnedSlice::from_vec(bindings),
})
} else {
ast::PathParameters::none()
};
let hi = self.span.hi;
return self.mk_expr(lo, hi, ExprQPath(P(QPath {
self_type: self_type,
trait_ref: P(trait_ref),
item_path: ast::PathSegment {
identifier: item_name,
parameters: parameters
}
})));
}
if self.eat_keyword(keywords::Move) {
return self.parse_lambda_expr(CaptureByValue);
}