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lang: codegen: implement returning the last value evaluated in a block

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max 🍓
2025-09-08 16:21:05 +01:00
parent 168310033d
commit 312e737f9f
1 changed files with 63 additions and 11 deletions
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72
lang/codegen/block.c
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@@ -8,6 +8,9 @@ struct block_codegen_state {
struct code_generator_state s_base;
struct code_generator_scope *s_scope;
struct codegen_var_map s_vars;
/* the value of the final expression in the block */
struct mie_value *s_result;
};
static struct code_generator_result gen_expr(
@@ -23,21 +26,21 @@ static struct code_generator_result gen_expr(
return CODEGEN_RESULT_OK(CODEGEN_R_REPEAT_NODE);
}
static struct code_generator_result gen_var_declaration(
static struct code_generator_result gen_for_loop(
struct ivy_codegen *gen, struct code_generator_state *state,
struct ivy_ast_node *node, size_t depth)
{
struct block_codegen_state *block = (struct block_codegen_state *)state;
struct mie_builder *builder = gen->c_builder;
struct mie_func *current = mie_builder_get_current_func(builder);
enum ivy_status status = IVY_OK;
if (status != IVY_OK) {
return CODEGEN_RESULT_ERR(status);
codegen_push_generator(
gen, CODE_GENERATOR_FOR_LOOP, CODEGEN_F_IGNORE_RESULT, NULL);
return CODEGEN_RESULT_OK(CODEGEN_R_REPEAT_NODE);
}
codegen_push_generator(gen, CODE_GENERATOR_VAR, 0, NULL);
static struct code_generator_result gen_while_loop(
struct ivy_codegen *gen, struct code_generator_state *state,
struct ivy_ast_node *node, size_t depth)
{
codegen_push_generator(
gen, CODE_GENERATOR_WHILE_LOOP, CODEGEN_F_IGNORE_RESULT, NULL);
return CODEGEN_RESULT_OK(CODEGEN_R_REPEAT_NODE);
}
@@ -59,6 +62,38 @@ static struct code_generator_result gen_return(
return CODEGEN_RESULT_OK(CODEGEN_R_REPEAT_NODE);
}
static struct code_generator_result gen_loop_break(
struct ivy_codegen *gen, struct code_generator_state *state,
struct ivy_ast_node *node, size_t depth)
{
struct block_codegen_state *block = (struct block_codegen_state *)state;
if (!state->s_loop_break_target) {
return CODEGEN_RESULT_ERR(IVY_ERR_BAD_SYNTAX);
}
mie_builder_br(gen->c_builder, state->s_loop_break_target);
block->s_result = mie_ctx_get_null(gen->c_ctx);
return CODEGEN_RESULT_OK(0);
}
static struct code_generator_result gen_loop_repeat(
struct ivy_codegen *gen, struct code_generator_state *state,
struct ivy_ast_node *node, size_t depth)
{
struct block_codegen_state *block = (struct block_codegen_state *)state;
if (!state->s_loop_repeat_target) {
return CODEGEN_RESULT_ERR(IVY_ERR_BAD_SYNTAX);
}
mie_builder_br(gen->c_builder, state->s_loop_repeat_target);
block->s_result = mie_ctx_get_null(gen->c_ctx);
return CODEGEN_RESULT_OK(0);
}
static enum ivy_status state_init(
struct ivy_codegen *gen, struct code_generator_state *state,
uintptr_t argv, void *argp)
@@ -73,9 +108,21 @@ static enum ivy_status state_fini(
struct ivy_codegen *gen, struct code_generator_state *state,
struct code_generator_value *result)
{
struct block_codegen_state *block = (struct block_codegen_state *)state;
code_generator_value_set_mie_value(result, block->s_result);
codegen_var_map_fini(&block->s_vars);
return IVY_OK;
}
static struct code_generator_result value_received(
struct ivy_codegen *gen, struct code_generator_state *state,
struct code_generator_value *value)
{
struct block_codegen_state *block = (struct block_codegen_state *)state;
block->s_result = code_generator_value_get_mie_value(value);
return CODEGEN_RESULT_OK(0);
}
static enum ivy_status define_var(
struct ivy_codegen *gen, struct code_generator_state *state,
const char *ident, const struct codegen_var *var)
@@ -106,8 +153,13 @@ struct code_generator block_generator = {
.g_state_size = sizeof(struct block_codegen_state),
.g_state_init = state_init,
.g_state_fini = state_fini,
.g_value_received = value_received,
.g_node_generators = {
NODE_CODEGEN(FOR_LOOP, gen_for_loop),
NODE_CODEGEN(WHILE_LOOP, gen_while_loop),
NODE_CODEGEN(RETURN, gen_return),
NODE_CODEGEN(LOOP_BREAK, gen_loop_break),
NODE_CODEGEN(LOOP_REPEAT, gen_loop_repeat),
},
.g_expr_generator = gen_expr,
.g_define_var = define_var,