Correct floating-point literal allowed ranges

The exponent range for floating-point values is [-1022, 1023].

Fixes #399.

2 files changed, 20 insertions, 0 deletions

diff --git a/test/cases/math.zig b/test/cases/math.zig
index 33708bd0d6..2bdeb3f3b8 100644
--- a/test/cases/math.zig
+++ b/test/cases/math.zig
@@ -251,3 +251,9 @@ test "allow signed integer division/remainder when values are comptime known and
 test "float literal parsing" {
     comptime assert(0x1.0 == 1.0);
 }
+
+test "hex float literal within range" {
+    const a = 0x1.0p1023;
+    const b = 0x0.1p1027;
+    const c = 0x1.0p-1022;
+}
diff --git a/test/compile_errors.zig b/test/compile_errors.zig
index e4b42b12a4..c78d17a916 100644
--- a/test/compile_errors.zig
+++ b/test/compile_errors.zig
@@ -1931,4 +1931,18 @@ pub fn addCases(cases: &tests.CompileErrorContext) {
         \\}
     ,
         ".tmp_source.zig:1:13: error: struct 'Foo' contains itself");
+
+    cases.add("float literal too large error",
+        \\comptime {
+        \\    const a = 0x1.0p1024;
+        \\}
+    ,
+        ".tmp_source.zig:2:15: error: float literal out of range of any type");
+
+    cases.add("float literal too small error (denormal)",
+        \\comptime {
+        \\    const a = 0x1.0p-1023;
+        \\}
+    ,
+        ".tmp_source.zig:2:15: error: float literal out of range of any type");
 }