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-rw-r--r--src/libexpr/lexer.l2
-rw-r--r--src/libexpr/parser.y1
-rw-r--r--tests/lang/eval-okay-dynamic-attrs-bare.exp1
-rw-r--r--tests/lang/eval-okay-dynamic-attrs-bare.nix17
4 files changed, 21 insertions, 0 deletions
diff --git a/src/libexpr/lexer.l b/src/libexpr/lexer.l
index 5d0360401..911850cc5 100644
--- a/src/libexpr/lexer.l
+++ b/src/libexpr/lexer.l
@@ -117,6 +117,8 @@ or { return OR_KW; }
return INT;
}
+\$\{ { return DOLLAR_CURLY; }
+
\" { BEGIN(STRING); return '"'; }
<STRING>([^\$\"\\]|\$[^\{\"]|\\.)+ {
/* !!! Not quite right: we want a follow restriction on
diff --git a/src/libexpr/parser.y b/src/libexpr/parser.y
index 28972cf72..230584388 100644
--- a/src/libexpr/parser.y
+++ b/src/libexpr/parser.y
@@ -509,6 +509,7 @@ attr
string_attr
: '"' string_parts '"' { $$ = $2; }
+ | DOLLAR_CURLY expr '}' { $$ = $2; }
;
expr_list
diff --git a/tests/lang/eval-okay-dynamic-attrs-bare.exp b/tests/lang/eval-okay-dynamic-attrs-bare.exp
new file mode 100644
index 000000000..df8750afc
--- /dev/null
+++ b/tests/lang/eval-okay-dynamic-attrs-bare.exp
@@ -0,0 +1 @@
+{ binds = true; hasAttrs = true; multiAttrs = true; recBinds = true; selectAttrs = true; selectOrAttrs = true; }
diff --git a/tests/lang/eval-okay-dynamic-attrs-bare.nix b/tests/lang/eval-okay-dynamic-attrs-bare.nix
new file mode 100644
index 000000000..0dbe15e63
--- /dev/null
+++ b/tests/lang/eval-okay-dynamic-attrs-bare.nix
@@ -0,0 +1,17 @@
+let
+ aString = "a";
+
+ bString = "b";
+in {
+ hasAttrs = { a.b = null; } ? ${aString}.b;
+
+ selectAttrs = { a.b = true; }.a.${bString};
+
+ selectOrAttrs = { }.${aString} or true;
+
+ binds = { ${aString}."${bString}c" = true; }.a.bc;
+
+ recBinds = rec { ${bString} = a; a = true; }.b;
+
+ multiAttrs = { ${aString} = true; ${bString} = false; }.a;
+}