Add numbers parsingHEADmain

1 files changed, 30 insertions, 0 deletions

diff --git a/asl/strings/parse_number_float.cpp b/asl/strings/parse_number_float.cpp
new file mode 100644
index 0000000..4568278
--- /dev/null
+++ b/asl/strings/parse_number_float.cpp
@@ -0,0 +1,30 @@
+// Copyright 2025 Steven Le Rouzic
+//
+// SPDX-License-Identifier: BSD-3-Clause
+
+#include <fast_float.h>
+
+// We need to isolate fast_float.h completely from asl
+// because it conflicts with our redefinitions of things
+// from the STL. In this case it's operator new, but there
+// might be other conflicts.
+
+namespace asl
+{
+
+extern bool parse_float_impl(const char** begin, const char* end, float* value)
+{
+    auto res = fast_float::from_chars(*begin, end, *value);
+    *begin = res.ptr;
+    return res.ec == std::errc{};
+}
+
+extern bool parse_double_impl(const char** begin, const char* end, double* value)
+{
+    auto res = fast_float::from_chars(*begin, end, *value);
+    *begin = res.ptr;
+    return res.ec == std::errc{};
+}
+
+} // namespace asl
+