add experimental tree-sitter grammar

.gitignore

@@ -1,2 +1,5 @@
 **/target/
 **/Cargo.lock
+tree-sitter-mers/log.html
+tree-sitter-mers/package-lock.json
+tree-sitter-mers/node_modules

tree-sitter-mers/Cargo.toml

@@ -0,0 +1,26 @@
+[package]
+name = "tree-sitter-mers"
+description = "mers grammar for the tree-sitter parsing library"
+version = "0.0.1"
+keywords = ["incremental", "parsing", "mers"]
+categories = ["parsing", "text-editors"]
+repository = "https://github.com/tree-sitter/tree-sitter-mers"
+edition = "2018"
+license = "MIT"
+
+build = "bindings/rust/build.rs"
+include = [
+  "bindings/rust/*",
+  "grammar.js",
+  "queries/*",
+  "src/*",
+]
+
+[lib]
+path = "bindings/rust/lib.rs"
+
+[dependencies]
+tree-sitter = "~0.20.10"
+
+[build-dependencies]
+cc = "1.0"

tree-sitter-mers/binding.gyp

@@ -0,0 +1,19 @@
+{
+  "targets": [
+    {
+      "target_name": "tree_sitter_mers_binding",
+      "include_dirs": [
+        "<!(node -e \"require('nan')\")",
+        "src"
+      ],
+      "sources": [
+        "bindings/node/binding.cc",
+        "src/parser.c",
+        # If your language uses an external scanner, add it here.
+      ],
+      "cflags_c": [
+        "-std=c99",
+      ]
+    }
+  ]
+}

tree-sitter-mers/bindings/node/binding.cc

@@ -0,0 +1,28 @@
+#include "tree_sitter/parser.h"
+#include <node.h>
+#include "nan.h"
+
+using namespace v8;
+
+extern "C" TSLanguage * tree_sitter_mers();
+
+namespace {
+
+NAN_METHOD(New) {}
+
+void Init(Local<Object> exports, Local<Object> module) {
+  Local<FunctionTemplate> tpl = Nan::New<FunctionTemplate>(New);
+  tpl->SetClassName(Nan::New("Language").ToLocalChecked());
+  tpl->InstanceTemplate()->SetInternalFieldCount(1);
+
+  Local<Function> constructor = Nan::GetFunction(tpl).ToLocalChecked();
+  Local<Object> instance = constructor->NewInstance(Nan::GetCurrentContext()).ToLocalChecked();
+  Nan::SetInternalFieldPointer(instance, 0, tree_sitter_mers());
+
+  Nan::Set(instance, Nan::New("name").ToLocalChecked(), Nan::New("mers").ToLocalChecked());
+  Nan::Set(module, Nan::New("exports").ToLocalChecked(), instance);
+}
+
+NODE_MODULE(tree_sitter_mers_binding, Init)
+
+}  // namespace

tree-sitter-mers/bindings/node/index.js

@@ -0,0 +1,19 @@
+try {
+  module.exports = require("../../build/Release/tree_sitter_mers_binding");
+} catch (error1) {
+  if (error1.code !== 'MODULE_NOT_FOUND') {
+    throw error1;
+  }
+  try {
+    module.exports = require("../../build/Debug/tree_sitter_mers_binding");
+  } catch (error2) {
+    if (error2.code !== 'MODULE_NOT_FOUND') {
+      throw error2;
+    }
+    throw error1
+  }
+}
+
+try {
+  module.exports.nodeTypeInfo = require("../../src/node-types.json");
+} catch (_) {}

tree-sitter-mers/bindings/rust/build.rs

@@ -0,0 +1,40 @@
+fn main() {
+    let src_dir = std::path::Path::new("src");
+
+    let mut c_config = cc::Build::new();
+    c_config.include(&src_dir);
+    c_config
+        .flag_if_supported("-Wno-unused-parameter")
+        .flag_if_supported("-Wno-unused-but-set-variable")
+        .flag_if_supported("-Wno-trigraphs");
+    let parser_path = src_dir.join("parser.c");
+    c_config.file(&parser_path);
+
+    // If your language uses an external scanner written in C,
+    // then include this block of code:
+
+    /*
+    let scanner_path = src_dir.join("scanner.c");
+    c_config.file(&scanner_path);
+    println!("cargo:rerun-if-changed={}", scanner_path.to_str().unwrap());
+    */
+
+    c_config.compile("parser");
+    println!("cargo:rerun-if-changed={}", parser_path.to_str().unwrap());
+
+    // If your language uses an external scanner written in C++,
+    // then include this block of code:
+
+    /*
+    let mut cpp_config = cc::Build::new();
+    cpp_config.cpp(true);
+    cpp_config.include(&src_dir);
+    cpp_config
+        .flag_if_supported("-Wno-unused-parameter")
+        .flag_if_supported("-Wno-unused-but-set-variable");
+    let scanner_path = src_dir.join("scanner.cc");
+    cpp_config.file(&scanner_path);
+    cpp_config.compile("scanner");
+    println!("cargo:rerun-if-changed={}", scanner_path.to_str().unwrap());
+    */
+}

tree-sitter-mers/bindings/rust/lib.rs

@@ -0,0 +1,52 @@
+//! This crate provides mers language support for the [tree-sitter][] parsing library.
+//!
+//! Typically, you will use the [language][language func] function to add this language to a
+//! tree-sitter [Parser][], and then use the parser to parse some code:
+//!
+//! ```
+//! let code = "";
+//! let mut parser = tree_sitter::Parser::new();
+//! parser.set_language(tree_sitter_mers::language()).expect("Error loading mers grammar");
+//! let tree = parser.parse(code, None).unwrap();
+//! ```
+//!
+//! [Language]: https://docs.rs/tree-sitter/*/tree_sitter/struct.Language.html
+//! [language func]: fn.language.html
+//! [Parser]: https://docs.rs/tree-sitter/*/tree_sitter/struct.Parser.html
+//! [tree-sitter]: https://tree-sitter.github.io/
+
+use tree_sitter::Language;
+
+extern "C" {
+    fn tree_sitter_mers() -> Language;
+}
+
+/// Get the tree-sitter [Language][] for this grammar.
+///
+/// [Language]: https://docs.rs/tree-sitter/*/tree_sitter/struct.Language.html
+pub fn language() -> Language {
+    unsafe { tree_sitter_mers() }
+}
+
+/// The content of the [`node-types.json`][] file for this grammar.
+///
+/// [`node-types.json`]: https://tree-sitter.github.io/tree-sitter/using-parsers#static-node-types
+pub const NODE_TYPES: &'static str = include_str!("../../src/node-types.json");
+
+// Uncomment these to include any queries that this grammar contains
+
+// pub const HIGHLIGHTS_QUERY: &'static str = include_str!("../../queries/highlights.scm");
+// pub const INJECTIONS_QUERY: &'static str = include_str!("../../queries/injections.scm");
+// pub const LOCALS_QUERY: &'static str = include_str!("../../queries/locals.scm");
+// pub const TAGS_QUERY: &'static str = include_str!("../../queries/tags.scm");
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn test_can_load_grammar() {
+        let mut parser = tree_sitter::Parser::new();
+        parser
+            .set_language(super::language())
+            .expect("Error loading mers language");
+    }
+}

tree-sitter-mers/grammar.js

@@ -0,0 +1,113 @@
+module.exports = grammar({
+  name: 'mers',
+  rules: {
+    source_file: $ => repeat($.definition),
+    definition: $ => choice(
+      $.init,
+      $.assign,
+      $.if,
+      $.func,
+      $.block,
+      $.tuple,
+      $.chain,
+      $.string,
+      $.number,
+      $.variable,
+    ),
+    definition_in_chain: $ => choice(
+      $.block,
+      $.tuple,
+      $.string,
+      $.number,
+      $.variable,
+    ),
+    definition_initable: $ => choice(
+      $.variable,
+      $.tuple,
+    ),
+    definition_assignable: $ => choice(
+      $.variable,
+      $.tuple,
+      $.block,
+      $.string,
+      $.number,
+    ),
+
+    block: $ => seq(
+      $.block_start,
+      repeat($.definition),
+      $.block_end
+    ),
+    block_start: $ => '{',
+    block_end: $ => '}',
+
+    if: $ => prec.left(seq(
+      $.if_if,
+      $.definition,
+      $.definition,
+      optional(seq(
+        $.if_else,
+        $.definition
+      ))
+    )),
+    if_if: $ => 'if',
+    if_else: $ => 'else',
+
+    func: $ => seq(
+      $.func_arg,
+      $.func_arrow,
+      $.func_body
+    ),
+    func_arg: $ => $.definition_assignable,
+    func_arrow: $ => '->',
+    func_body: $ => $.definition,
+
+    init: $ => seq(
+      $.init_to,
+      $.init_colonequals,
+      $.init_source,
+    ),
+    init_to: $ => $.definition_initable,
+    init_colonequals: $ => ':=',
+    init_source: $ => $.definition,
+
+    assign: $ => seq(
+      $.assign_to,
+      $.assign_equals,
+      $.assign_source,
+    ),
+    assign_to: $ => $.definition_assignable,
+    assign_equals: $ => '=',
+    assign_source: $ => $.definition,
+
+    tuple: $ => seq(
+      $.tuple_start,
+      repeat(seq(
+        $.definition,
+        $.tuple_separator
+      )),
+      $.tuple_end
+    ),
+    tuple_start: $ => '(',
+    tuple_end: $ => ')',
+    tuple_separator: $ => /(,\s*)|\s+/,
+
+    chain: $ => seq(
+      $.chain_dot,
+      $.definition_in_chain,
+    ),
+    chain_dot: $ => '.',
+
+    number: $ => /[\+-]?(\d+)|(\d+\.\d+)/,
+
+    variable: $ => /&?[^\s:=\.\{\}\[\]\(\)\d"]+/,
+
+    string: $ => seq(
+      '"',
+      $.string_content,
+      '"'
+    ),
+    string_content: $ => /([^\\"]|[\\.])+/,
+
+  }
+})

tree-sitter-mers/package.json

@@ -0,0 +1,18 @@
+{
+  "name": "tree-sitter-mers",
+  "version": "1.0.0",
+  "description": "tree-sitter syntax highlighting for mers",
+  "main": "bindings/node",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "nan": "^2.18.0"
+  },
+  "tree-sitter": [{
+    "scope": "source.mers",
+    "file-types": ["mers"]
+  }]
+}

tree-sitter-mers/queries/highlights.scm

@@ -0,0 +1,14 @@
+(string) @string
+(variable) @variable
+(number) @number
+(chain_dot) @punctuation.delimeter
+
+(if_if) @keyword.control.conditional
+(if_else) @keyword.control.conditional
+
+(func_arrow) @function
+
+(block_start) @punctuation.bracket
+(block_end) @punctuation.bracket
+(tuple_start) @punctuation.bracket
+(tuple_end) @punctuation.bracket

tree-sitter-mers/src/grammar.json

@@ -0,0 +1,384 @@
+{
+  "name": "mers",
+  "rules": {
+    "source_file": {
+      "type": "REPEAT",
+      "content": {
+        "type": "SYMBOL",
+        "name": "definition"
+      }
+    },
+    "definition": {
+      "type": "CHOICE",
+      "members": [
+        {
+          "type": "SYMBOL",
+          "name": "init"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "assign"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "if"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "func"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "block"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "tuple"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "chain"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "string"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "number"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "variable"
+        }
+      ]
+    },
+    "definition_in_chain": {
+      "type": "CHOICE",
+      "members": [
+        {
+          "type": "SYMBOL",
+          "name": "block"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "tuple"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "string"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "number"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "variable"
+        }
+      ]
+    },
+    "definition_initable": {
+      "type": "CHOICE",
+      "members": [
+        {
+          "type": "SYMBOL",
+          "name": "variable"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "tuple"
+        }
+      ]
+    },
+    "definition_assignable": {
+      "type": "CHOICE",
+      "members": [
+        {
+          "type": "SYMBOL",
+          "name": "variable"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "tuple"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "block"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "string"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "number"
+        }
+      ]
+    },
+    "block": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "SYMBOL",
+          "name": "block_start"
+        },
+        {
+          "type": "REPEAT",
+          "content": {
+            "type": "SYMBOL",
+            "name": "definition"
+          }
+        },
+        {
+          "type": "SYMBOL",
+          "name": "block_end"
+        }
+      ]
+    },
+    "block_start": {
+      "type": "STRING",
+      "value": "{"
+    },
+    "block_end": {
+      "type": "STRING",
+      "value": "}"
+    },
+    "if": {
+      "type": "PREC_LEFT",
+      "value": 0,
+      "content": {
+        "type": "SEQ",
+        "members": [
+          {
+            "type": "SYMBOL",
+            "name": "if_if"
+          },
+          {
+            "type": "SYMBOL",
+            "name": "definition"
+          },
+          {
+            "type": "SYMBOL",
+            "name": "definition"
+          },
+          {
+            "type": "CHOICE",
+            "members": [
+              {
+                "type": "SEQ",
+                "members": [
+                  {
+                    "type": "SYMBOL",
+                    "name": "if_else"
+                  },
+                  {
+                    "type": "SYMBOL",
+                    "name": "definition"
+                  }
+                ]
+              },
+              {
+                "type": "BLANK"
+              }
+            ]
+          }
+        ]
+      }
+    },
+    "if_if": {
+      "type": "STRING",
+      "value": "if"
+    },
+    "if_else": {
+      "type": "STRING",
+      "value": "else"
+    },
+    "func": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "SYMBOL",
+          "name": "func_arg"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "func_arrow"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "func_body"
+        }
+      ]
+    },
+    "func_arg": {
+      "type": "SYMBOL",
+      "name": "definition_assignable"
+    },
+    "func_arrow": {
+      "type": "STRING",
+      "value": "->"
+    },
+    "func_body": {
+      "type": "SYMBOL",
+      "name": "definition"
+    },
+    "init": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "SYMBOL",
+          "name": "init_to"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "init_colonequals"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "init_source"
+        }
+      ]
+    },
+    "init_to": {
+      "type": "SYMBOL",
+      "name": "definition_initable"
+    },
+    "init_colonequals": {
+      "type": "STRING",
+      "value": ":="
+    },
+    "init_source": {
+      "type": "SYMBOL",
+      "name": "definition"
+    },
+    "assign": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "SYMBOL",
+          "name": "assign_to"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "assign_equals"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "assign_source"
+        }
+      ]
+    },
+    "assign_to": {
+      "type": "SYMBOL",
+      "name": "definition_assignable"
+    },
+    "assign_equals": {
+      "type": "STRING",
+      "value": "="
+    },
+    "assign_source": {
+      "type": "SYMBOL",
+      "name": "definition"
+    },
+    "tuple": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "SYMBOL",
+          "name": "tuple_start"
+        },
+        {
+          "type": "REPEAT",
+          "content": {
+            "type": "SEQ",
+            "members": [
+              {
+                "type": "SYMBOL",
+                "name": "definition"
+              },
+              {
+                "type": "SYMBOL",
+                "name": "tuple_separator"
+              }
+            ]
+          }
+        },
+        {
+          "type": "SYMBOL",
+          "name": "tuple_end"
+        }
+      ]
+    },
+    "tuple_start": {
+      "type": "STRING",
+      "value": "("
+    },
+    "tuple_end": {
+      "type": "STRING",
+      "value": ")"
+    },
+    "tuple_separator": {
+      "type": "PATTERN",
+      "value": "(,\\s*)|\\s+"
+    },
+    "chain": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "SYMBOL",
+          "name": "chain_dot"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "definition_in_chain"
+        }
+      ]
+    },
+    "chain_dot": {
+      "type": "STRING",
+      "value": "."
+    },
+    "number": {
+      "type": "PATTERN",
+      "value": "[\\+-]?(\\d+)|(\\d+\\.\\d+)"
+    },
+    "variable": {
+      "type": "PATTERN",
+      "value": "&?[^\\s:=\\.\\{\\}\\[\\]\\(\\)\\d\"]+"
+    },
+    "string": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "STRING",
+          "value": "\""
+        },
+        {
+          "type": "SYMBOL",
+          "name": "string_content"
+        },
+        {
+          "type": "STRING",
+          "value": "\""
+        }
+      ]
+    },
+    "string_content": {
+      "type": "PATTERN",
+      "value": "([^\\\\\"]|[\\\\.])+"
+    }
+  },
+  "extras": [
+    {
+      "type": "PATTERN",
+      "value": "\\s"
+    }
+  ],
+  "conflicts": [],
+  "precedences": [],
+  "externals": [],
+  "inline": [],
+  "supertypes": []
+}
+

tree-sitter-mers/src/node-types.json

@@ -0,0 +1,475 @@
+[
+  {
+    "type": "assign",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": true,
+      "required": true,
+      "types": [
+        {
+          "type": "assign_equals",
+          "named": true
+        },
+        {
+          "type": "assign_source",
+          "named": true
+        },
+        {
+          "type": "assign_to",
+          "named": true
+        }
+      ]
+    }
+  },
+  {
+    "type": "assign_source",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": false,
+      "required": true,
+      "types": [
+        {
+          "type": "definition",
+          "named": true
+        }
+      ]
+    }
+  },
+  {
+    "type": "assign_to",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": false,
+      "required": true,
+      "types": [
+        {
+          "type": "definition_assignable",
+          "named": true
+        }
+      ]
+    }
+  },
+  {
+    "type": "block",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": true,
+      "required": true,
+      "types": [
+        {
+          "type": "block_end",
+          "named": true
+        },
+        {
+          "type": "block_start",
+          "named": true
+        },
+        {
+          "type": "definition",
+          "named": true
+        }
+      ]
+    }
+  },
+  {
+    "type": "chain",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": true,
+      "required": true,
+      "types": [
+        {
+          "type": "chain_dot",
+          "named": true
+        },
+        {
+          "type": "definition_in_chain",
+          "named": true
+        }
+      ]
+    }
+  },
+  {
+    "type": "definition",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": false,
+      "required": true,
+      "types": [
+        {
+          "type": "assign",
+          "named": true
+        },
+        {
+          "type": "block",
+          "named": true
+        },
+        {
+          "type": "chain",
+          "named": true
+        },
+        {
+          "type": "func",
+          "named": true
+        },
+        {
+          "type": "if",
+          "named": true
+        },
+        {
+          "type": "init",
+          "named": true
+        },
+        {
+          "type": "number",
+          "named": true
+        },
+        {
+          "type": "string",
+          "named": true
+        },
+        {
+          "type": "tuple",
+          "named": true
+        },
+        {
+          "type": "variable",
+          "named": true
+        }
+      ]
+    }
+  },
+  {
+    "type": "definition_assignable",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": false,
+      "required": true,
+      "types": [
+        {
+          "type": "block",
+          "named": true
+        },
+        {
+          "type": "number",
+          "named": true
+        },
+        {
+          "type": "string",
+          "named": true
+        },
+        {
+          "type": "tuple",
+          "named": true
+        },
+        {
+          "type": "variable",
+          "named": true
+        }
+      ]
+    }
+  },
+  {
+    "type": "definition_in_chain",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": false,
+      "required": true,
+      "types": [
+        {
+          "type": "block",
+          "named": true
+        },
+        {
+          "type": "number",
+          "named": true
+        },
+        {
+          "type": "string",
+          "named": true
+        },
+        {
+          "type": "tuple",
+          "named": true
+        },
+        {
+          "type": "variable",
+          "named": true
+        }
+      ]
+    }
+  },
+  {
+    "type": "definition_initable",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": false,
+      "required": true,
+      "types": [
+        {
+          "type": "tuple",
+          "named": true
+        },
+        {
+          "type": "variable",
+          "named": true
+        }
+      ]
+    }
+  },
+  {
+    "type": "func",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": true,
+      "required": true,
+      "types": [
+        {
+          "type": "func_arg",
+          "named": true
+        },
+        {
+          "type": "func_arrow",
+          "named": true
+        },
+        {
+          "type": "func_body",
+          "named": true
+        }
+      ]
+    }
+  },
+  {
+    "type": "func_arg",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": false,
+      "required": true,
+      "types": [
+        {
+          "type": "definition_assignable",
+          "named": true
+        }
+      ]
+    }
+  },
+  {
+    "type": "func_body",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": false,
+      "required": true,
+      "types": [
+        {
+          "type": "definition",
+          "named": true
+        }
+      ]
+    }
+  },
+  {
+    "type": "if",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": true,
+      "required": true,
+      "types": [
+        {
+          "type": "definition",
+          "named": true
+        },
+        {
+          "type": "if_else",
+          "named": true
+        },
+        {
+          "type": "if_if",
+          "named": true
+        }
+      ]
+    }
+  },
+  {
+    "type": "init",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": true,
+      "required": true,
+      "types": [
+        {
+          "type": "init_colonequals",
+          "named": true
+        },
+        {
+          "type": "init_source",
+          "named": true
+        },
+        {
+          "type": "init_to",
+          "named": true
+        }
+      ]
+    }
+  },
+  {
+    "type": "init_source",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": false,
+      "required": true,
+      "types": [
+        {
+          "type": "definition",
+          "named": true
+        }
+      ]
+    }
+  },
+  {
+    "type": "init_to",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": false,
+      "required": true,
+      "types": [
+        {
+          "type": "definition_initable",
+          "named": true
+        }
+      ]
+    }
+  },
+  {
+    "type": "source_file",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": true,
+      "required": false,
+      "types": [
+        {
+          "type": "definition",
+          "named": true
+        }
+      ]
+    }
+  },
+  {
+    "type": "string",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": false,
+      "required": true,
+      "types": [
+        {
+          "type": "string_content",
+          "named": true
+        }
+      ]
+    }
+  },
+  {
+    "type": "tuple",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": true,
+      "required": true,
+      "types": [
+        {
+          "type": "definition",
+          "named": true
+        },
+        {
+          "type": "tuple_end",
+          "named": true
+        },
+        {
+          "type": "tuple_separator",
+          "named": true
+        },
+        {
+          "type": "tuple_start",
+          "named": true
+        }
+      ]
+    }
+  },
+  {
+    "type": "\"",
+    "named": false
+  },
+  {
+    "type": "assign_equals",
+    "named": true
+  },
+  {
+    "type": "block_end",
+    "named": true
+  },
+  {
+    "type": "block_start",
+    "named": true
+  },
+  {
+    "type": "chain_dot",
+    "named": true
+  },
+  {
+    "type": "func_arrow",
+    "named": true
+  },
+  {
+    "type": "if_else",
+    "named": true
+  },
+  {
+    "type": "if_if",
+    "named": true
+  },
+  {
+    "type": "init_colonequals",
+    "named": true
+  },
+  {
+    "type": "number",
+    "named": true
+  },
+  {
+    "type": "string_content",
+    "named": true
+  },
+  {
+    "type": "tuple_end",
+    "named": true
+  },
+  {
+    "type": "tuple_separator",
+    "named": true
+  },
+  {
+    "type": "tuple_start",
+    "named": true
+  },
+  {
+    "type": "variable",
+    "named": true
+  }
+]

tree-sitter-mers/src/tree_sitter/parser.h

@@ -0,0 +1,224 @@
+#ifndef TREE_SITTER_PARSER_H_
+#define TREE_SITTER_PARSER_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#define ts_builtin_sym_error ((TSSymbol)-1)
+#define ts_builtin_sym_end 0
+#define TREE_SITTER_SERIALIZATION_BUFFER_SIZE 1024
+
+typedef uint16_t TSStateId;
+
+#ifndef TREE_SITTER_API_H_
+typedef uint16_t TSSymbol;
+typedef uint16_t TSFieldId;
+typedef struct TSLanguage TSLanguage;
+#endif
+
+typedef struct {
+  TSFieldId field_id;
+  uint8_t child_index;
+  bool inherited;
+} TSFieldMapEntry;
+
+typedef struct {
+  uint16_t index;
+  uint16_t length;
+} TSFieldMapSlice;
+
+typedef struct {
+  bool visible;
+  bool named;
+  bool supertype;
+} TSSymbolMetadata;
+
+typedef struct TSLexer TSLexer;
+
+struct TSLexer {
+  int32_t lookahead;
+  TSSymbol result_symbol;
+  void (*advance)(TSLexer *, bool);
+  void (*mark_end)(TSLexer *);
+  uint32_t (*get_column)(TSLexer *);
+  bool (*is_at_included_range_start)(const TSLexer *);
+  bool (*eof)(const TSLexer *);
+};
+
+typedef enum {
+  TSParseActionTypeShift,
+  TSParseActionTypeReduce,
+  TSParseActionTypeAccept,
+  TSParseActionTypeRecover,
+} TSParseActionType;
+
+typedef union {
+  struct {
+    uint8_t type;
+    TSStateId state;
+    bool extra;
+    bool repetition;
+  } shift;
+  struct {
+    uint8_t type;
+    uint8_t child_count;
+    TSSymbol symbol;
+    int16_t dynamic_precedence;
+    uint16_t production_id;
+  } reduce;
+  uint8_t type;
+} TSParseAction;
+
+typedef struct {
+  uint16_t lex_state;
+  uint16_t external_lex_state;
+} TSLexMode;
+
+typedef union {
+  TSParseAction action;
+  struct {
+    uint8_t count;
+    bool reusable;
+  } entry;
+} TSParseActionEntry;
+
+struct TSLanguage {
+  uint32_t version;
+  uint32_t symbol_count;
+  uint32_t alias_count;
+  uint32_t token_count;
+  uint32_t external_token_count;
+  uint32_t state_count;
+  uint32_t large_state_count;
+  uint32_t production_id_count;
+  uint32_t field_count;
+  uint16_t max_alias_sequence_length;
+  const uint16_t *parse_table;
+  const uint16_t *small_parse_table;
+  const uint32_t *small_parse_table_map;
+  const TSParseActionEntry *parse_actions;
+  const char * const *symbol_names;
+  const char * const *field_names;
+  const TSFieldMapSlice *field_map_slices;
+  const TSFieldMapEntry *field_map_entries;
+  const TSSymbolMetadata *symbol_metadata;
+  const TSSymbol *public_symbol_map;
+  const uint16_t *alias_map;
+  const TSSymbol *alias_sequences;
+  const TSLexMode *lex_modes;
+  bool (*lex_fn)(TSLexer *, TSStateId);
+  bool (*keyword_lex_fn)(TSLexer *, TSStateId);
+  TSSymbol keyword_capture_token;
+  struct {
+    const bool *states;
+    const TSSymbol *symbol_map;
+    void *(*create)(void);
+    void (*destroy)(void *);
+    bool (*scan)(void *, TSLexer *, const bool *symbol_whitelist);
+    unsigned (*serialize)(void *, char *);
+    void (*deserialize)(void *, const char *, unsigned);
+  } external_scanner;
+  const TSStateId *primary_state_ids;
+};
+
+/*
+ *  Lexer Macros
+ */
+
+#define START_LEXER()           \
+  bool result = false;          \
+  bool skip = false;            \
+  bool eof = false;             \
+  int32_t lookahead;            \
+  goto start;                   \
+  next_state:                   \
+  lexer->advance(lexer, skip);  \
+  start:                        \
+  skip = false;                 \
+  lookahead = lexer->lookahead;
+
+#define ADVANCE(state_value) \
+  {                          \
+    state = state_value;     \
+    goto next_state;         \
+  }
+
+#define SKIP(state_value) \
+  {                       \
+    skip = true;          \
+    state = state_value;  \
+    goto next_state;      \
+  }
+
+#define ACCEPT_TOKEN(symbol_value)     \
+  result = true;                       \
+  lexer->result_symbol = symbol_value; \
+  lexer->mark_end(lexer);
+
+#define END_STATE() return result;
+
+/*
+ *  Parse Table Macros
+ */
+
+#define SMALL_STATE(id) id - LARGE_STATE_COUNT
+
+#define STATE(id) id
+
+#define ACTIONS(id) id
+
+#define SHIFT(state_value)            \
+  {{                                  \
+    .shift = {                        \
+      .type = TSParseActionTypeShift, \
+      .state = state_value            \
+    }                                 \
+  }}
+
+#define SHIFT_REPEAT(state_value)     \
+  {{                                  \
+    .shift = {                        \
+      .type = TSParseActionTypeShift, \
+      .state = state_value,           \
+      .repetition = true              \
+    }                                 \
+  }}
+
+#define SHIFT_EXTRA()                 \
+  {{                                  \
+    .shift = {                        \
+      .type = TSParseActionTypeShift, \
+      .extra = true                   \
+    }                                 \
+  }}
+
+#define REDUCE(symbol_val, child_count_val, ...) \
+  {{                                             \
+    .reduce = {                                  \
+      .type = TSParseActionTypeReduce,           \
+      .symbol = symbol_val,                      \
+      .child_count = child_count_val,            \
+      __VA_ARGS__                                \
+    },                                           \
+  }}
+
+#define RECOVER()                    \
+  {{                                 \
+    .type = TSParseActionTypeRecover \
+  }}
+
+#define ACCEPT_INPUT()              \
+  {{                                \
+    .type = TSParseActionTypeAccept \
+  }}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  // TREE_SITTER_PARSER_H_

tree-sitter-mers/test.mers

@@ -0,0 +1,8 @@
+(my_arg, some_flag) -> {
+	x := "test"
+	if some_flag {
+		my_arg.println
+	} else {
+		x.println
+	}
+}