8 files changed, 81 insertions, 15 deletions
diff --git a/cpp/.traces/jump_backward b/cpp/.traces/jump_backward
index 6d9e433f..48164312 100644
--- a/cpp/.traces/jump_backward
+++ b/cpp/.traces/jump_backward
@@ -1,20 +1,9 @@
 parse/0: instruction: 10
 parse/0:   ingredient: {name: "1", type: 0}
-parse/0:   ingredient: {name: "//", type: }
-parse/0:   ingredient: {name: "0", type: }
-parse/0:   ingredient: {name: "-+", type: }
 parse/0: instruction: 10
 parse/0:   ingredient: {name: "1", type: 0}
-parse/0:   ingredient: {name: "//", type: }
-parse/0:   ingredient: {name: "|", type: }
-parse/0:   ingredient: {name: "1", type: }
-parse/0:   ingredient: {name: "+-+", type: }
 parse/0: instruction: 10
 parse/0:   ingredient: {name: "-2", type: 0}
-parse/0:   ingredient: {name: "//", type: }
-parse/0:   ingredient: {name: "2", type: }
-parse/0:   ingredient: {name: "+-->+", type: }
-parse/0:   ingredient: {name: "|", type: }
 run/0: instruction main/0
 run/0: ingredient 0 is 1
 run/0: instruction main/2
diff --git a/cpp/.traces/parse_comment_after_instruction b/cpp/.traces/parse_comment_after_instruction
new file mode 100644
index 00000000..d20319d2
--- /dev/null
+++ b/cpp/.traces/parse_comment_after_instruction
@@ -0,0 +1,3 @@
+parse/0: instruction: 1
+parse/0:   ingredient: {name: "23", type: 0}
+parse/0:   product: {name: "1", type: 1}
diff --git a/cpp/.traces/parse_comment_amongst_instruction b/cpp/.traces/parse_comment_amongst_instruction
new file mode 100644
index 00000000..d20319d2
--- /dev/null
+++ b/cpp/.traces/parse_comment_amongst_instruction
@@ -0,0 +1,3 @@
+parse/0: instruction: 1
+parse/0:   ingredient: {name: "23", type: 0}
+parse/0:   product: {name: "1", type: 1}
diff --git a/cpp/.traces/parse_comment_amongst_instruction2 b/cpp/.traces/parse_comment_amongst_instruction2
new file mode 100644
index 00000000..d20319d2
--- /dev/null
+++ b/cpp/.traces/parse_comment_amongst_instruction2
@@ -0,0 +1,3 @@
+parse/0: instruction: 1
+parse/0:   ingredient: {name: "23", type: 0}
+parse/0:   product: {name: "1", type: 1}
diff --git a/cpp/.traces/parse_comment_amongst_instruction3 b/cpp/.traces/parse_comment_amongst_instruction3
new file mode 100644
index 00000000..7b755615
--- /dev/null
+++ b/cpp/.traces/parse_comment_amongst_instruction3
@@ -0,0 +1,6 @@
+parse/0: instruction: 1
+parse/0:   ingredient: {name: "23", type: 0}
+parse/0:   product: {name: "1", type: 1}
+parse/0: instruction: 1
+parse/0:   ingredient: {name: "23", type: 0}
+parse/0:   product: {name: "2", type: 1}
diff --git a/cpp/.traces/parse_comment_outside_recipe b/cpp/.traces/parse_comment_outside_recipe
new file mode 100644
index 00000000..d20319d2
--- /dev/null
+++ b/cpp/.traces/parse_comment_outside_recipe
@@ -0,0 +1,3 @@
+parse/0: instruction: 1
+parse/0:   ingredient: {name: "23", type: 0}
+parse/0:   product: {name: "1", type: 1}
diff --git a/cpp/011load b/cpp/011load
index 9806bfd0..d01c72d2 100644
--- a/cpp/011load
+++ b/cpp/011load
@@ -109,6 +109,8 @@ string next_word(istream& in) {
   ostringstream out;
   skip_whitespace(in);
   slurp_word(in, out);
+  skip_whitespace(in);
+  skip_comment(in);
   return out.str();
 }
 
@@ -144,12 +146,68 @@ void skip_comments_and_newlines(istream& in) {
   }
 }
 
+void skip_comment(istream& in) {
+  if (in.peek() == '#') {
+    in.get();
+    while (in.peek() != '\n') in.get();
+  }
+}
+
 void skip_comma(istream& in) {
   skip_whitespace(in);
   if (in.peek() == ',') in.get();
   skip_whitespace(in);
 }
 
+:(scenario parse_comment_outside_recipe)
+# comment
+recipe main [
+  1:integer <- copy 23:literal
+]
++parse: instruction: 1
++parse:   ingredient: {name: "23", type: 0}
++parse:   product: {name: "1", type: 1}
+
+:(scenario parse_comment_amongst_instruction)
+recipe main [
+  # comment
+  1:integer <- copy 23:literal
+]
++parse: instruction: 1
++parse:   ingredient: {name: "23", type: 0}
++parse:   product: {name: "1", type: 1}
+
+:(scenario parse_comment_amongst_instruction2)
+recipe main [
+  # comment
+  1:integer <- copy 23:literal
+  # comment
+]
++parse: instruction: 1
++parse:   ingredient: {name: "23", type: 0}
++parse:   product: {name: "1", type: 1}
+
+:(scenario parse_comment_amongst_instruction3)
+recipe main [
+  1:integer <- copy 23:literal
+  # comment
+  2:integer <- copy 23:literal
+]
++parse: instruction: 1
++parse:   ingredient: {name: "23", type: 0}
++parse:   product: {name: "1", type: 1}
++parse: instruction: 1
++parse:   ingredient: {name: "23", type: 0}
++parse:   product: {name: "2", type: 1}
+
+:(scenario parse_comment_after_instruction)
+recipe main [
+  1:integer <- copy 23:literal # comment
+]
++parse: instruction: 1
++parse:   ingredient: {name: "23", type: 0}
++parse:   product: {name: "1", type: 1}
+
 :(scenario parse_label)
 recipe main [
   +foo
diff --git a/cpp/015jump b/cpp/015jump
index 5b4a9624..2ce18859 100644
--- a/cpp/015jump
+++ b/cpp/015jump
@@ -24,10 +24,11 @@ recipe main [
 
 :(scenario "jump_backward")
 recipe main [
-  jump 1:offset  // 0 -+
-  jump 1:offset  //    | 1 +-+
-  jump -2:offset //  2 +-->+ |
-]                //       3 \/
+  jump 1:offset  # 0 -+
+  jump 1:offset  #    |   +-+ 1
+                 #   \/  /\ |
+  jump -2:offset #  2 +-->+ |
+]                #         \/ 3
 +run: instruction main/0
 +run: instruction main/2
 +run: instruction main/1