diff options
Diffstat (limited to 'src/libexpr/parser.y')
| -rw-r--r-- | src/libexpr/parser.y | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/src/libexpr/parser.y b/src/libexpr/parser.y index 7713021a909e..c48aa34aaf48 100644 --- a/src/libexpr/parser.y +++ b/src/libexpr/parser.y @@ -211,7 +211,8 @@ static void freeAndUnprotect(void * p) } %type <t> start expr expr_function expr_if expr_op -%type <t> expr_app expr_select expr_simple bind inheritsrc formal pattern +%type <t> expr_app expr_select expr_simple bind inheritsrc formal +%type <t> pattern pattern2 %type <ts> binds ids expr_list formals string_parts ind_string_parts %token <t> ID INT STR IND_STR PATH URI %token IF THEN ELSE ASSERT WITH LET IN REC INHERIT EQ NEQ AND OR IMPL @@ -319,6 +320,11 @@ ind_string_parts ; pattern + : pattern2 '@' pattern { $$ = makeAtPat($1, $3); } + | pattern2 + ; + +pattern2 : ID { $$ = makeVarPat($1); } | '{' formals '}' { $$ = makeAttrsPat($2); } ; @@ -394,6 +400,7 @@ static void checkPatternVars(ATerm pos, ATermMap & map, Pattern pat) { ATerm name; ATermList formals; + Pattern pat1, pat2; if (matchVarPat(pat, name)) { if (map.get(name)) throw EvalError(format("duplicate formal function argument `%1%' at %2%") @@ -410,6 +417,10 @@ static void checkPatternVars(ATerm pos, ATermMap & map, Pattern pat) map.set(name, name); } } + else if (matchAtPat(pat, pat1, pat2)) { + checkPatternVars(pos, map, pat1); + checkPatternVars(pos, map, pat2); + } else abort(); } |