lang: ast: add a BLOCK ast node to hold lists of expressions

lang/ast/block.c

@@ -0,0 +1,66 @@
+#include "ctx.h"
+#include "node.h"
+
+#include <blue/object/string.h>
+#include <ivy/lang/lex.h>
+#include <stdio.h>
+
+struct block_parser_state {
+	struct parser_state s_base;
+	bool s_single_expr;
+	unsigned int s_terminator;
+};
+
+static struct token_parse_result parse_end(
+	struct ivy_parser *ctx, struct ivy_token *tok)
+{
+	struct block_parser_state *state
+		= parser_get_state(ctx, struct class_parser_state);
+
+	struct ivy_ast_block_node *node
+		= (struct ivy_ast_block_node *)(state->s_base.s_node);
+
+	parser_pop_state(ctx, STATE_ADD_NODE_TO_PARENT);
+	return PARSE_RESULT(IVY_OK, 0);
+}
+
+static struct token_parse_result parse_expr_begin(
+	struct ivy_parser *ctx, struct ivy_token *tok)
+{
+	struct block_parser_state *state
+		= parser_get_state(ctx, struct class_parser_state);
+
+	struct ivy_ast_block_node *node
+		= (struct ivy_ast_block_node *)(state->s_base.s_node);
+
+	parser_push_state(ctx, IVY_AST_EXPR);
+	return PARSE_RESULT(IVY_OK, PARSE_REPEAT_TOKEN);
+}
+
+static enum ivy_status add_child(
+	struct ivy_ast_node *parent, struct ivy_ast_node *child)
+{
+	struct ivy_ast_block_node *block = (struct ivy_ast_block_node *)parent;
+
+	b_queue_push_back(&block->n_expr, &child->n_entry);
+
+	return IVY_OK;
+}
+
+static void init_state(struct ivy_parser *ctx, struct parser_state *sp)
+{
+	struct class_parser_state *state = (struct class_parser_state *)sp;
+}
+
+struct ast_node_type block_node_ops = {
+	.n_add_child = add_child,
+	.n_init_state = init_state,
+	.n_state_size = sizeof(struct block_parser_state),
+	.n_node_size = sizeof(struct ivy_ast_block_node),
+	.n_keyword_parsers = {
+		[IVY_KW_END] = parse_end,
+	},
+	.n_expr_parser = {
+		.expr_begin = parse_expr_begin,
+	},
+};

lang/ast/expr.c

@@ -118,6 +118,7 @@ static enum ivy_status finalise_expr(struct expr_parser_state *state)
 	}
 
 	printf("\n");
+	printf("%zu\n", sizeof(struct ast_node_type));
 	return IVY_OK;
 }
 

lang/ast/msgh.c

@@ -30,6 +30,24 @@ static struct token_parse_result parse_expr(
 	return PARSE_RESULT(IVY_OK, PARSE_REPEAT_TOKEN);
 }
 
+
+static struct token_parse_result parse_bang(
+	struct ivy_parser *ctx, struct ivy_token *tok)
+{
+	struct msgh_parser_state *state
+		= parser_get_state(ctx, struct msgh_parser_state);
+
+	struct ivy_ast_msgh_node *msgh
+		= (struct ivy_ast_msgh_node *)state->s_base.s_node;
+
+	if (!msgh->n_sel || state->s_oneline) {
+		return PARSE_RESULT(IVY_ERR_BAD_SYNTAX, 0);
+	}
+
+	parser_pop_state(ctx, STATE_ADD_NODE_TO_PARENT);
+	return PARSE_RESULT(IVY_OK, 0);
+}
+
 static enum ivy_status add_child(
 	struct ivy_ast_node *parent, struct ivy_ast_node *child)
 {
@@ -40,7 +58,11 @@ static enum ivy_status add_child(
 		return IVY_OK;
 	}
 
-	b_queue_push_back(&msgh->n_body, &child->n_entry);
+	if (child->n_type == IVY_AST_BLOCK && !msgh->n_body) {
+		msgh->n_body = child;
+		return IVY_OK;
+	}
+
 	return IVY_OK;
 }
 
@@ -61,5 +83,8 @@ struct ast_node_type msgh_node_ops = {
         .n_node_size = sizeof(struct ivy_ast_msgh_node),
 	.n_expr_parser = {
 		.expr_begin = parse_expr,
-	}
+	},
+	.n_symbol_parsers = {
+		[IVY_SYM_BANG] = parse_bang,
+	},
 };

lang/ast/node.c

@@ -243,7 +243,7 @@ const char *ivy_ast_node_type_to_string(enum ivy_ast_node_type v)
 		ENUM_STR(IVY_AST_COND_GROUP);
 		ENUM_STR(IVY_AST_COND);
 		ENUM_STR(IVY_AST_TUPLE);
-		ENUM_STR(IVY_AST_DO);
+		ENUM_STR(IVY_AST_BLOCK);
 		ENUM_STR(IVY_AST_TYPE_COUNT);
 	default:
 		return "";

lang/ast/node.h

@@ -12,6 +12,7 @@ struct parser_state;
 #define PARSE_RESULT(status, flags)                                            \
 	((struct token_parse_result) {.r_status = (status), .r_flags = (flags)})
 
+
 enum token_parse_flags {
 	PARSE_REPEAT_TOKEN = 0x01u,
 };

lang/include/ivy/lang/ast.h

@@ -16,6 +16,7 @@ enum ivy_ast_node_type {
 	IVY_AST_MSG,
 	IVY_AST_CLASS,
 	IVY_AST_MSGH,
+	IVY_AST_BLOCK,
 	IVY_AST_SELECTOR,
 	IVY_AST_PROPERTY,
 	IVY_AST_LAMBDA,
@@ -33,7 +34,6 @@ enum ivy_ast_node_type {
 	IVY_AST_COND_GROUP,
 	IVY_AST_COND,
 	IVY_AST_TUPLE,
-	IVY_AST_DO,
 	IVY_AST_TYPE_COUNT,
 };
 
@@ -104,8 +104,8 @@ struct ivy_ast_msgh_node {
 	struct ivy_ast_node n_base;
 	enum ivy_ast_msgh_recipient_type n_recipient;
 	struct ivy_ast_selector_node *n_sel;
-	/* queue of struct ivy_ast_node; expressions to evaluate when message handler is executed. */
-	b_queue n_body;
+	/* expressions to evaluate when lambda is executed. */
+	struct ivy_ast_block_node *n_body;
 };
 
 struct ivy_ast_property_node {
@@ -129,8 +129,8 @@ struct ivy_ast_lambda_node {
 	struct ivy_ast_node n_base;
 	/* queue of struct lex_token; contains the names of the lambda parameters. */
 	b_queue n_arg;
-	/* queue of struct ivy_ast_node; expressions to evaluate when lambda is executed. */
-	b_queue n_body;
+	/* expressions to evaluate when lambda is executed. */
+	struct ivy_ast_block_node *n_body;
 };
 
 struct ivy_ast_unit_package_node {
@@ -222,10 +222,10 @@ struct ivy_ast_tuple_node {
 	b_queue n_members;
 };
 
-struct ivy_ast_do_node {
+struct ivy_ast_block_node {
 	struct ivy_ast_node n_base;
 	/* queue of struct ivy_ast_node. expressions to evaluate when the do node itself is evaluated. */
-	b_queue n_members;
+	b_queue n_expr;
 };
 
 typedef enum ivy_status (*ivy_ast_node_iteration_callback)(