move to a direct byte code compiler (#8)

* chore: refactor to keep only the new parser and bytecode vm

* scanner: remove Token.value field

* scanner: remove scanner.kind field

* chore: move language specification in lang package

This avoid a cyclic dependency in scanner_test which can now use
the golang/GoSpec language specification for Go.

* clean code

* scanner: export scanner fields

Also parser now generate function calls, including externals.

* chore: fix lint issues

* parser: handle strings

* wip

* parser: implement support for 'if, else, else if' statements

Resolving labels in the compiler still in progress.

* parser: support if statements, improve compiler

* improve handling of functions

* improve support of local variables

* scanner: trim leading and trailing spaces

* fixes to make fibonacci work

* parser: improve README, fix function parameters parsing

1 files changed, 0 insertions, 27 deletions

diff --git a/vm0/README.md b/vm0/README.md
deleted file mode 100644
index fc89429..0000000
--- a/vm0/README.md
+++ /dev/null
@@ -1,27 +0,0 @@
-# vm0
-
-vm0 is a virtual machine executing directly the syntax tree.
-
-```mermaid
-graph LR
-s[ ] --> |source| a(scanner)
---> |tokens| b(parser)
---> |AST| c(vm)
-subgraph vm0
-    c
-end
-style s height:0px;
-```
-
-The execution is performed by walking the AST and evaluating each
-visited node.
-
-
-## Motivation
-
-- have a reference execution model for each defined language
-- usable for compilation time evaluation
-- to modelize similar VMs (i.e. gnovm)
-- to validate and compare with other VMs (once it is itself validated)
-- could serve as a basis for AST based symbolic execution (to be
-  investigated)