From 9f30b56e1370acb046bb7f0e02945b66bc5eea4e Mon Sep 17 00:00:00 2001
From: Christoffer Lerno <christoffer@aegik.com>
Date: Wed, 28 May 2025 13:01:49 +0200
Subject: [PATCH] Deprecate `f32`, `f64` and `f128` suffixes.

---
 releasenotes.md           | 1 +
 src/compiler/parse_expr.c | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/releasenotes.md b/releasenotes.md
index fd013c502..08ae9861b 100644
--- a/releasenotes.md
+++ b/releasenotes.md
@@ -20,6 +20,7 @@
 - `@jump` now included in `--list-attributes` #2155.
 - Add `$$matrix_mul` and `$$matrix_transpose` builtins.
 - Add `d` as floating point suffix for `double` types.
+- Deprecate `f32`, `f64` and `f128` suffixes.
 
 ### Fixes
 - Assert triggered when casting from `int[2]` to `uint[2]` #2115
diff --git a/src/compiler/parse_expr.c b/src/compiler/parse_expr.c
index 2a48c75da..852d599cd 100644
--- a/src/compiler/parse_expr.c
+++ b/src/compiler/parse_expr.c
@@ -1822,6 +1822,14 @@ static Expr *parse_double(ParseContext *c, Expr *left)
 	bool is_hex = original[0] == '0' && original[1] == 'x';
 	// This is set to try to print in a similar manner as the input.
 	number->const_expr.is_hex = is_hex;
+	if (c->data.lex_len > 3)
+	{
+		const char *last = c->data.lex_start + c->data.lex_len - 3;
+		if (last[0] == 'f' && ((last[1] == '3' && last[2] == '2') || (last[1] == '6' && last[2] == '4')))
+		{
+			SEMA_DEPRECATED(number, "Float number suffixes are deprecated, use 'f' and 'd' instead.'");
+		}
+	}
 	Float f = is_hex ? float_from_hex(original, &err) : float_from_string(original, &err);
 	if (f.type == TYPE_POISONED)
 	{