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Bison grammar: add qualified path expressions

This commit is contained in:
Brian Leibig 2015-02-10 16:10:05 -08:00
parent ad6bb17acf
commit 41d6513b8f
1 changed files with 31 additions and 0 deletions
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31
src/grammar/parser-lalr.y
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@ -1309,6 +1309,7 @@ nonblock_expr
| nonblock_expr AS ty { $$ = mk_node("ExprCast", 2, $1, $3); }
| BOX nonparen_expr { $$ = mk_node("ExprBox", 1, $2); }
| %prec BOXPLACE BOX '(' maybe_expr ')' nonblock_expr { $$ = mk_node("ExprBox", 2, $3, $5); }
| expr_qualified_path
| nonblock_prefix_expr
;
@ -1367,6 +1368,7 @@ expr
| expr AS ty { $$ = mk_node("ExprCast", 2, $1, $3); }
| BOX nonparen_expr { $$ = mk_node("ExprBox", 1, $2); }
| %prec BOXPLACE BOX '(' maybe_expr ')' expr { $$ = mk_node("ExprBox", 2, $3, $5); }
| expr_qualified_path
| block_expr
| block
| nonblock_prefix_expr
@ -1426,6 +1428,7 @@ nonparen_expr
| nonparen_expr AS ty { $$ = mk_node("ExprCast", 2, $1, $3); }
| BOX nonparen_expr { $$ = mk_node("ExprBox", 1, $2); }
| %prec BOXPLACE BOX '(' maybe_expr ')' expr { $$ = mk_node("ExprBox", 1, $3, $5); }
| expr_qualified_path
| block_expr
| block
| nonblock_prefix_expr
@ -1485,6 +1488,7 @@ expr_nostruct
| expr_nostruct AS ty { $$ = mk_node("ExprCast", 2, $1, $3); }
| BOX nonparen_expr { $$ = mk_node("ExprBox", 1, $2); }
| %prec BOXPLACE BOX '(' maybe_expr ')' expr_nostruct { $$ = mk_node("ExprBox", 1, $3, $5); }
| expr_qualified_path
| block_expr
| block
| nonblock_prefix_expr_nostruct
@ -1512,6 +1516,33 @@ nonblock_prefix_expr
| proc_expr
;
expr_qualified_path
: '<' ty_sum AS trait_ref '>' MOD_SEP ident
{
$$ = mk_node("ExprQualifiedPath", 3, $2, $4, $7);
}
| '<' ty_sum AS trait_ref '>' MOD_SEP ident generic_args
{
$$ = mk_node("ExprQualifiedPath", 4, $2, $4, $7, $8);
}
| SHL ty_sum AS trait_ref '>' MOD_SEP ident AS trait_ref '>' MOD_SEP ident
{
$$ = mk_node("ExprQualifiedPath", 3, mk_node("ExprQualifiedPath", 3, $2, $4, $7), $9, $12);
}
| SHL ty_sum AS trait_ref '>' MOD_SEP ident generic_args AS trait_ref '>' MOD_SEP ident
{
$$ = mk_node("ExprQualifiedPath", 3, mk_node("ExprQualifiedPath", 4, $2, $4, $7, $8), $10, $13);
}
| SHL ty_sum AS trait_ref '>' MOD_SEP ident AS trait_ref '>' MOD_SEP ident generic_args
{
$$ = mk_node("ExprQualifiedPath", 4, mk_node("ExprQualifiedPath", 3, $2, $4, $7), $9, $12, $13);
}
| SHL ty_sum AS trait_ref '>' MOD_SEP ident generic_args AS trait_ref '>' MOD_SEP ident generic_args
{
$$ = mk_node("ExprQualifiedPath", 4, mk_node("ExprQualifiedPath", 4, $2, $4, $7, $8), $10, $13, $14);
}
lambda_expr
: %prec LAMBDA
OROR ret_ty expr { $$ = mk_node("ExprFnBlock", 3, mk_none(), $2, $3); }