1 files changed, 114 insertions, 0 deletions
diff --git a/sdecls_cgen.c b/sdecls_cgen.c
new file mode 100644
index 0000000..1b333d6
--- /dev/null
+++ b/sdecls_cgen.c
@@ -0,0 +1,114 @@
+/*
+  Copyright (C) 2019, 2020 Leo Tenenbaum.
+  This file is part of toc. toc is distributed under version 3 of the GNU General Public License, without any warranty whatsoever.
+  You should have received a copy of the GNU General Public License along with toc. If not, see <https://www.gnu.org/licenses/>.
+*/
+static bool cgen_sdecls_stmt(CGenerator *g, Statement *s);
+static bool cgen_sdecls_decl(CGenerator *g, Declaration *d);
+static bool cgen_sdecls_expr(CGenerator *g, Expression *e);
+
+/* i is the name for this type, NULL if not available */
+/* ALWAYS RETURNS TRUE. it just returns a bool for cgen_recurse_into_type to work */
+static bool cgen_sdecls_type(CGenerator *g, Type *type) {
+	if (!(type->flags & TYPE_IS_RESOLVED)) /* non-instance constant fn parameter type */
+		return true;
+	if (type->kind == TYPE_STRUCT) {
+		StructDef *sdef = type->struc;
+		/* we'll actually define the struct later; here we can just declare it */
+	
+		if (sdef->flags & STRUCT_DEF_CGEN_DECLARED) {
+			/* we've already done this */
+		} else {
+			cgen_write(g, "struct ");
+			if (sdef->name) {
+				cgen_ident(g, sdef->name);
+			} else {
+				IdentID id = ++g->ident_counter;
+				cgen_ident_id(g, id);
+				sdef->c.id = id;
+			}
+			cgen_write(g, ";");
+			cgen_nl(g);
+			sdef->flags |= STRUCT_DEF_CGEN_DECLARED;
+		}
+	}
+	cgen_recurse_subtypes(cgen_sdecls_type, g, type);
+	return true;
+}
+
+static bool cgen_sdecls_block(CGenerator *g, Block *b) {
+	Block *prev = g->block;
+	if (!cgen_block_enter(g, b))
+		return false;
+	arr_foreach(b->stmts, Statement, s)
+		if (!cgen_sdecls_stmt(g, s))
+			return false;
+	if (b->ret_expr && !cgen_sdecls_expr(g, b->ret_expr))
+		return false;
+	cgen_block_exit(g, prev);
+	return true;
+}
+
+static bool cgen_sdecls_expr(CGenerator *g, Expression *e) {
+	cgen_recurse_subexprs(g, e, cgen_sdecls_expr, cgen_sdecls_block, cgen_sdecls_decl);
+	if (e->kind == EXPR_CAST) {
+		cgen_sdecls_type(g, &e->cast.type);
+	}
+	if (e->kind == EXPR_FN) {
+		/* needs to go before decls_cgen.c... */
+		e->fn->c.id = ++g->ident_counter;
+	}
+	if (e->kind == EXPR_TYPE) {
+		if (!cgen_sdecls_type(g, &e->typeval))
+			return false;
+	}
+	return true;
+
+}
+
+static bool cgen_sdecls_decl(CGenerator *g, Declaration *d) {
+	cgen_sdecls_type(g, &d->type);
+	if (cgen_fn_is_direct(g, d)) {
+		d->expr.fn->c.name = d->idents[0];
+	}
+	for (int idx = 0; idx < (int)arr_len(d->idents); ++idx) {
+		Type *type = decl_type_at_index(d, idx);
+		Value *val = decl_val_at_index(d, idx);
+		if (type_is_builtin(type, BUILTIN_TYPE)) {
+			if (!cgen_sdecls_type(g, val->type))
+				return false;
+		}
+	}
+	if (d->flags & DECL_HAS_EXPR) {
+		if (!cgen_sdecls_expr(g, &d->expr))
+			return false;
+	}
+	return true;
+}
+
+static bool cgen_sdecls_stmt(CGenerator *g, Statement *s) {
+	switch (s->kind) {
+	case STMT_DECL:
+		if (!cgen_sdecls_decl(g, &s->decl))
+			return false;
+		break;
+	case STMT_EXPR:
+		if (!cgen_sdecls_expr(g, &s->expr))
+			return false;
+		break;
+	case STMT_RET:
+		if (s->ret.flags & RET_HAS_EXPR)
+			if (!cgen_sdecls_expr(g, &s->ret.expr))
+				return false;
+		break;
+	}
+	return true;
+}
+
+static bool cgen_sdecls_file(CGenerator *g, ParsedFile *f) {
+	arr_foreach(f->stmts, Statement, s) {
+		if (!cgen_sdecls_stmt(g, s))
+			return false;
+	}
+	return true;
+}