Changes to ROUNDMODE now invalidate cached string values.

1 files changed, 35 insertions, 0 deletions

diff --git a/test/mpfrrndeval.awk b/test/mpfrrndeval.awk
new file mode 100644
index 00000000..12010052
--- /dev/null
+++ b/test/mpfrrndeval.awk
@@ -0,0 +1,35 @@
+# Tests side effects (like caching) on the evaluation (formatting and
+# rounding) of MPFR variables vs literals.
+BEGIN {
+	pi = 3.1416
+	e = 2.7183
+	golden = 1.6180
+
+	# Evaluated as number with (default) OFMT.
+	print pi
+	print e
+	print golden
+	printf "\n"
+
+	# Evaluated as number with (custom) OFMT.
+	OFMT = "%.f"
+	ROUNDMODE = "U";  print "Variable pi U:", pi
+	ROUNDMODE = "D";  print "Variable pi D:", pi
+	ROUNDMODE = "U";  print "Literal  pi U:", 3.1416
+	ROUNDMODE = "D";  print "Literal  pi D:", 3.1416
+	printf "\n"
+
+	# Evaluated as string with (custom) CONVFMT. Absent comma.
+	CONVFMT = "%.f"
+	ROUNDMODE = "D";  print "Variable e D: " e
+	ROUNDMODE = "U";  print "Variable e U: " e
+	ROUNDMODE = "D";  print "Literal  e D: " 2.7183
+	ROUNDMODE = "U";  print "Literal  e U: " 2.7183
+	printf "\n"
+
+	# Evaluated as number with (hardcoded) printf conversion.
+	ROUNDMODE = "N";  printf "Variable golden N: %.f\n", golden
+	ROUNDMODE = "Z";  printf "Variable golden Z: %.f\n", golden
+	ROUNDMODE = "N";  printf "Literal  golden N: %.f\n", 1.6180
+	ROUNDMODE = "Z";  printf "Literal  golden Z: %.f\n", 1.6180
+}