From 97f7782968c5e3dcf448dde4f3343b4b169ad33e Mon Sep 17 00:00:00 2001
From: Max Wash <mbswash@gmail.com>
Date: Mon, 8 Sep 2025 16:22:06 +0100
Subject: [PATCH] lang: codegen: expr: implement generating true/false/null
 constants

---
 lang/codegen/expr.c | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/lang/codegen/expr.c b/lang/codegen/expr.c
index 76d4ded..53a2ec9 100644
--- a/lang/codegen/expr.c
+++ b/lang/codegen/expr.c
@@ -105,6 +105,39 @@ static struct code_generator_result gen_int(
 	return CODEGEN_RESULT_OK(0);
 }
 
+static struct code_generator_result gen_keyword_const(
+	struct ivy_codegen *gen, struct code_generator_state *state,
+	struct ivy_ast_node *node, size_t depth)
+{
+	struct expr_codegen_state *expr = (struct expr_codegen_state *)state;
+
+	debug_printf("codegen: got keyword const\n");
+
+	struct mie_value *value = NULL;
+
+	switch (node->n_type) {
+	case IVY_AST_C_TRUE:
+		value = mie_ctx_get_int(gen->c_ctx, 1, 1);
+		break;
+	case IVY_AST_C_FALSE:
+		value = mie_ctx_get_int(gen->c_ctx, 0, 1);
+		break;
+	case IVY_AST_C_NULL:
+		value = mie_ctx_get_null(gen->c_ctx);
+		break;
+	default:
+		return CODEGEN_RESULT_ERR(IVY_ERR_BAD_SYNTAX);
+		break;
+	}
+
+	enum ivy_status status = push_operand(expr, node, value, NULL);
+	if (status != IVY_OK) {
+		return CODEGEN_RESULT_ERR(status);
+	}
+
+	return CODEGEN_RESULT_OK(0);
+}
+
 static struct code_generator_result gen_string(
 	struct ivy_codegen *gen, struct code_generator_state *state,
 	struct ivy_ast_node *node, size_t depth)
@@ -508,6 +541,9 @@ struct code_generator expr_generator = {
 	.g_state_fini = state_fini,
 	.g_value_received = value_received,
 	.g_node_generators = {
+		NODE_CODEGEN(C_TRUE, gen_keyword_const),
+		NODE_CODEGEN(C_FALSE, gen_keyword_const),
+		NODE_CODEGEN(C_NULL, gen_keyword_const),
 		NODE_CODEGEN(INT, gen_int),
 		NODE_CODEGEN(OP, gen_op),
 		NODE_CODEGEN(MSG, gen_msg),