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authorMainShayne233 <shaynetremblay@hotmail.com>2019-04-07 00:24:24 -0400
committerLouis Pilfold <louis@lpil.uk>2019-04-07 08:54:53 +0000
commit8cf56dae7043c25b152e10aa02d0a7ead7454380 (patch)
tree150e46aab0d7741e0eec8c7e31d80d658939366f /src/str.gleam
parent673e9e907093bd448db3b108b3d654c13cdc66f7 (diff)
downloadgleam_stdlib-8cf56dae7043c25b152e10aa02d0a7ead7454380.tar.gz
gleam_stdlib-8cf56dae7043c25b152e10aa02d0a7ead7454380.zip
Implement parse_float
Diffstat (limited to 'src/str.gleam')
-rw-r--r--src/str.gleam28
1 files changed, 28 insertions, 0 deletions
diff --git a/src/str.gleam b/src/str.gleam
index 6ee8235..bd027a1 100644
--- a/src/str.gleam
+++ b/src/str.gleam
@@ -121,6 +121,34 @@ test parse_int {
|> expect:equal(_, Error(ParseError))
}
+pub external fn parse_float(String) -> Result(Float, ParseError) = "gleam__stdlib" "parse_float";
+
+test parse_float {
+ "1.23"
+ |> parse_float
+ |> expect:equal(_, Ok(1.23))
+
+ "5.0"
+ |> parse_float
+ |> expect:equal(_, Ok(5.0))
+
+ "0.123456789"
+ |> parse_float
+ |> expect:equal(_, Ok(0.123456789))
+
+ ""
+ |> parse_float
+ |> expect:equal(_, Error(ParseError))
+
+ "what"
+ |> parse_float
+ |> expect:equal(_, Error(ParseError))
+
+ "1"
+ |> parse_float
+ |> expect:equal(_, Error(ParseError))
+}
+
pub external fn base_from_int(Int, Int) -> String = "erlang" "integer_to_binary"
test base_from_int {