Parse params

[bendudson]

Adds the capability to put parameters in expressions, which are looked up when the value is generated. This allows values generated at run-time to be combined using expressions in the input file.

[dschwoerer]

I tried passing by const reference, as that makes more sense - even if real() as modifier is chosen, it is easy enough to take a non-const copy, and pass that on. However, that does not silence the warnings ...

This patch makes the output acceptable:

--- a/tests/unit/quiet.sh
+++ b/tests/unit/quiet.sh
@@ -4,13 +4,23 @@ set -o pipefail
 for cmd in $@
 do
     $cmd | awk '{
+    if (match($0,"WARNING: Accessing zero value")) {
+      samecount = samecount + 1
+    } else {
+      if (samecount) {
+         print running
+         print samecount, "WARNING: Accessing zero value"
+        samecount = 0
+      }
+
     if (match($0,"^$")) {
         empty=1
         #print "empty", $0
-        if (running)
+        if (running) {
             out=1
-        else
+        } else {
             out=0
+        }
         
     } else {
         if (match($0,"\\[ *RUN *\\]")) {
@@ -41,6 +51,7 @@ do
         }
         empty=0
     }
+    }
     if (out)
         print $0
 }' || exit

[ZedThree]

Idea for future PR: make this variant<signed char, enum{Number, Symbol, String, EOF}>?

[ZedThree]

With this change, Position feels like a bit of a misnomer. Maybe something like Context, or GeneratorContext would be more appropriate?