bshell/bshell.runtime/parse/syntax/block.c

#include "../syntax.h"

bool parse_block(struct bshell_parse_ctx *ctx, struct bshell_ast_node **out)
{
	if (!parse_symbol(ctx, BSHELL_SYM_LEFT_BRACE)) {
		return false;
	}

	parse_linefeed(ctx);

	struct bshell_block_ast_node *block
		= (struct bshell_block_ast_node *)bshell_ast_node_create(
			BSHELL_AST_BLOCK);

	bool ok = true;
	while (1) {
		if (parse_symbol(ctx, BSHELL_SYM_RIGHT_BRACE)) {
			break;
		}

		parse_linefeed(ctx);

		struct bshell_ast_node *stmt = NULL;
		if (!parse_statement(ctx, &stmt)) {
			ok = false;
			break;
		}

		fx_queue_push_back(&block->n_statements, &stmt->n_entry);

		parse_linefeed(ctx);

		if (parse_symbol(ctx, BSHELL_SYM_RIGHT_BRACE)) {
			break;
		}

		if (!parse_linefeed(ctx)
		    && !parse_symbol(ctx, BSHELL_SYM_SEMICOLON)) {
			report_error(
				ctx,
				"expected `;`, `}`, or linefeed after "
				"statement");
			ok = false;
			break;
		}
	}

	if (!ok) {
		bshell_ast_node_destroy((struct bshell_ast_node *)block);
		block = NULL;
	}

	*out = (struct bshell_ast_node *)block;
	return true;
}