implement string->float

1 files changed, 12 insertions, 0 deletions

diff --git a/neb/std/types.py b/neb/std/types.py
index cc40066..44906d8 100644
--- a/neb/std/types.py
+++ b/neb/std/types.py
@@ -108,6 +108,18 @@ stringtoint_multi = MultiFunction("string->int")
 stringtoint_multi.register(stringtoint_func)
 TYPES.register("string->int", stringtoint_multi)
 
+def interpretStringToFloat(symbol, args, env, ns):
+    try:
+        val = float(args[0].value)
+        return Float(val)
+    except:
+        raise InterpretPanic(symbol, "can't convert to a :float", args[0])
+
+stringtofloat_func = Builtin("string->float", interpretStringToFloat, [Arg("arg", TypeEnum.STRING)], return_type=Type(":float"))
+stringtofloat_multi = MultiFunction("string->float")
+stringtofloat_multi.register(stringtofloat_func)
+TYPES.register("string->float", stringtofloat_multi)
+
 def interpretToString(symbol, args, env, ns):
     item = args[0]
     if isinstance(item, String):