Improving terraform hcl

src/hcl/hcl.contribution.ts

@@ -7,8 +7,8 @@
 import { registerLanguage } from '../_.contribution';
 
 registerLanguage({
-	id: 'hcl',
-	extensions: ['.tf', '.tfvars', '.hcl'],
-	aliases: ['Terraform', 'tf', 'HCL', 'hcl'],
-	loader: () => import('./hcl')
+    id: 'hcl',
+    extensions: ['.tf', '.tfvars', '.hcl'],
+    aliases: ['Terraform', 'tf', 'HCL', 'hcl'],
+    loader: () => import('./hcl')
 });

src/hcl/hcl.test.ts

@@ -0,0 +1,1201 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+"use strict";
+
+import { testTokenization } from "../test/testRunner";
+
+testTokenization("hcl", [
+    /*
+    // Foo
+    /* Bar */
+    /*
+    /*
+    Baz
+    *\/
+    # Another
+
+    # Multiple
+    # Lines
+    foo = "bar"
+    */
+    [
+        {
+            line: "// Foo",
+            tokens: [{ startIndex: 0, type: "comment.hcl" }],
+        },
+        {
+            line: "/* Bar */",
+            tokens: [{ startIndex: 0, type: "comment.hcl" }],
+        },
+        {
+            line: "/*",
+            tokens: [{ startIndex: 0, type: "comment.hcl" }],
+        },
+        {
+            line: "/*",
+            tokens: [{ startIndex: 0, type: "comment.hcl" }],
+        },
+        {
+            line: "Baz",
+            tokens: [{ startIndex: 0, type: "comment.hcl" }],
+        },
+        {
+            line: "*/",
+            tokens: [{ startIndex: 0, type: "comment.hcl" }],
+        },
+        {
+            line: "# Another",
+            tokens: [{ startIndex: 0, type: "comment.hcl" }],
+        },
+        {
+            line: "",
+            tokens: [],
+        },
+        {
+            line: "# Multiple",
+            tokens: [{ startIndex: 0, type: "comment.hcl" }],
+        },
+        {
+            line: "# Lines",
+            tokens: [{ startIndex: 0, type: "comment.hcl" }],
+        },
+        {
+            line: 'foo = "bar"',
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 3, type: "" },
+                { startIndex: 4, type: "operator.hcl" },
+                { startIndex: 5, type: "" },
+                { startIndex: 6, type: "string.hcl" },
+            ],
+        },
+    ],
+
+    [
+        {
+            line: "",
+            tokens: [],
+        },
+    ],
+
+    /*
+    foo = [
+        "1",
+        "2", # comment
+    ]
+    */
+    [
+        {
+            line: "foo = [",
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 3, type: "" },
+                { startIndex: 4, type: "operator.hcl" },
+                { startIndex: 5, type: "" },
+                { startIndex: 6, type: "delimiter.square.hcl" },
+            ],
+        },
+        {
+            line: '"1",',
+            tokens: [
+                { startIndex: 0, type: "string.hcl" },
+                { startIndex: 3, type: "delimiter.hcl" },
+            ],
+        },
+        {
+            line: '"2", # comment',
+            tokens: [
+                { startIndex: 0, type: "string.hcl" },
+                { startIndex: 3, type: "delimiter.hcl" },
+                { startIndex: 4, type: "" },
+                { startIndex: 5, type: "comment.hcl" },
+            ],
+        },
+        {
+            line: "]",
+            tokens: [{ startIndex: 0, type: "delimiter.square.hcl" }],
+        },
+    ],
+
+    /*
+    resource = [{
+    "foo": {
+        "bar": {},
+        "baz": [1, 2, "foo"],
+        }
+    }]
+    */
+    [
+        {
+            line: "resource = [{",
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 8, type: "" },
+                { startIndex: 9, type: "operator.hcl" },
+                { startIndex: 10, type: "" },
+                { startIndex: 11, type: "delimiter.square.hcl" },
+                { startIndex: 12, type: "delimiter.curly.hcl" },
+            ],
+        },
+        {
+            line: '"foo": {',
+            tokens: [
+                { startIndex: 0, type: "string.hcl" },
+                { startIndex: 5, type: "operator.hcl" },
+                { startIndex: 6, type: "" },
+                { startIndex: 7, type: "delimiter.curly.hcl" },
+            ],
+        },
+        {
+            line: '"bar": {},',
+            tokens: [
+                { startIndex: 0, type: "string.hcl" },
+                { startIndex: 5, type: "operator.hcl" },
+                { startIndex: 6, type: "" },
+                { startIndex: 7, type: "delimiter.curly.hcl" },
+                { startIndex: 9, type: "delimiter.hcl" },
+            ],
+        },
+        {
+            line: '"baz": [1, 2, "foo"],',
+            tokens: [
+                { startIndex: 0, type: "string.hcl" },
+                { startIndex: 5, type: "operator.hcl" },
+                { startIndex: 6, type: "" },
+                { startIndex: 7, type: "delimiter.square.hcl" },
+                { startIndex: 8, type: "number.hcl" },
+                { startIndex: 9, type: "delimiter.hcl" },
+                { startIndex: 10, type: "" },
+                { startIndex: 11, type: "number.hcl" },
+                { startIndex: 12, type: "delimiter.hcl" },
+                { startIndex: 13, type: "" },
+                { startIndex: 14, type: "string.hcl" },
+                { startIndex: 19, type: "delimiter.square.hcl" },
+                { startIndex: 20, type: "delimiter.hcl" },
+            ],
+        },
+        {
+            line: "}",
+            tokens: [{ startIndex: 0, type: "delimiter.curly.hcl" }],
+        },
+        {
+            line: "}]",
+            tokens: [
+                { startIndex: 0, type: "delimiter.curly.hcl" },
+                { startIndex: 1, type: "delimiter.square.hcl" },
+            ],
+        },
+    ],
+
+    /*
+    variable "foo" {
+        default = "bar"
+        description = "bar"
+    }
+    */
+    [
+        {
+            line: 'variable "foo" {',
+            tokens: [
+                { startIndex: 0, type: "type.hcl" },
+                { startIndex: 8, type: "" },
+                { startIndex: 9, type: "string.hcl" },
+                { startIndex: 14, type: "" },
+                { startIndex: 15, type: "delimiter.curly.hcl" },
+            ],
+        },
+        {
+            line: '  default = "bar"',
+            tokens: [
+                { startIndex: 0, type: "" },
+                { startIndex: 2, type: "variable.hcl" },
+                { startIndex: 9, type: "" },
+                { startIndex: 10, type: "operator.hcl" },
+                { startIndex: 11, type: "" },
+                { startIndex: 12, type: "string.hcl" },
+            ],
+        },
+        {
+            line: '  description = "bar"',
+            tokens: [
+                { startIndex: 0, type: "" },
+                { startIndex: 2, type: "variable.hcl" },
+                { startIndex: 13, type: "" },
+                { startIndex: 14, type: "operator.hcl" },
+                { startIndex: 15, type: "" },
+                { startIndex: 16, type: "string.hcl" },
+            ],
+        },
+        {
+            line: "}",
+            tokens: [{ startIndex: 0, type: "delimiter.curly.hcl" }],
+        },
+    ],
+    [
+        {
+            line: 'provider "aws" {',
+            tokens: [
+                { startIndex: 0, type: "type.hcl" },
+                { startIndex: 8, type: "" },
+                { startIndex: 9, type: "string.hcl" },
+                { startIndex: 14, type: "" },
+                { startIndex: 15, type: "delimiter.curly.hcl" },
+            ],
+        },
+    ],
+    /*
+    provider "do" {
+        api_key = "${var.foo}"
+    }
+    */
+    [
+        {
+            line: 'provider "do" {',
+            tokens: [
+                { startIndex: 0, type: "type.hcl" },
+                { startIndex: 8, type: "" },
+                { startIndex: 9, type: "string.hcl" },
+                { startIndex: 13, type: "" },
+                { startIndex: 14, type: "delimiter.curly.hcl" },
+            ],
+        },
+        {
+            line: '  api_key = "${var.foo}"',
+            tokens: [
+                { startIndex: 0, type: "" },
+                { startIndex: 2, type: "variable.hcl" },
+                { startIndex: 9, type: "" },
+                { startIndex: 10, type: "operator.hcl" },
+                { startIndex: 11, type: "" },
+                { startIndex: 12, type: "string.hcl" },
+                { startIndex: 13, type: "delimiter.hcl" },
+                { startIndex: 15, type: "keyword.var.hcl" },
+                { startIndex: 18, type: "delimiter.hcl" },
+                { startIndex: 19, type: "variable.hcl" },
+                { startIndex: 22, type: "delimiter.hcl" },
+                { startIndex: 23, type: "string.hcl" },
+            ],
+        },
+        {
+            line: "}",
+            tokens: [{ startIndex: 0, type: "delimiter.curly.hcl" }],
+        },
+    ],
+    /*
+    resource "aws_security_group" "firewall" {
+        count = 5
+    }
+    */
+    [
+        {
+            line: 'resource "aws_security_group" "firewall" {',
+            tokens: [
+                { startIndex: 0, type: "type.hcl" },
+                { startIndex: 8, type: "" },
+                { startIndex: 9, type: "string.hcl" },
+                { startIndex: 29, type: "" },
+                { startIndex: 30, type: "string.hcl" },
+                { startIndex: 40, type: "" },
+                { startIndex: 41, type: "delimiter.curly.hcl" },
+            ],
+        },
+        {
+            line: "  count = 5",
+            tokens: [
+                { startIndex: 0, type: "" },
+                { startIndex: 2, type: "variable.hcl" },
+                { startIndex: 7, type: "" },
+                { startIndex: 8, type: "operator.hcl" },
+                { startIndex: 9, type: "" },
+                { startIndex: 10, type: "number.hcl" },
+            ],
+        },
+        {
+            line: "}",
+            tokens: [{ startIndex: 0, type: "delimiter.curly.hcl" }],
+        },
+    ],
+    [
+        {
+            line: "resource aws_security_group firewall {",
+            tokens: [
+                { startIndex: 0, type: "type.hcl" },
+                { startIndex: 8, type: "" },
+                { startIndex: 9, type: "string.hcl" },
+                { startIndex: 27, type: "" },
+                { startIndex: 28, type: "string.hcl" },
+                { startIndex: 36, type: "" },
+                { startIndex: 37, type: "delimiter.curly.hcl" },
+            ],
+        },
+    ],
+    [
+        {
+            line: 'resource "aws_security_group" firewall {',
+            tokens: [
+                { startIndex: 0, type: "type.hcl" },
+                { startIndex: 8, type: "" },
+                { startIndex: 9, type: "string.hcl" },
+                { startIndex: 29, type: "" },
+                { startIndex: 30, type: "string.hcl" },
+                { startIndex: 38, type: "" },
+                { startIndex: 39, type: "delimiter.curly.hcl" },
+            ],
+        },
+    ],
+    [
+        {
+            line: 'resource aws_security_group "firewall" {',
+            tokens: [
+                { startIndex: 0, type: "type.hcl" },
+                { startIndex: 8, type: "" },
+                { startIndex: 9, type: "string.hcl" },
+                { startIndex: 27, type: "" },
+                { startIndex: 28, type: "string.hcl" },
+                { startIndex: 38, type: "" },
+                { startIndex: 39, type: "delimiter.curly.hcl" },
+            ],
+        },
+    ],
+    /*
+    resource aws_instance "web" {
+        ami = "${var.foo}"
+        security_groups = [
+            "foo",
+            "${aws_security_group.firewall.foo}"
+        ]
+        network_interface {
+            device_index = 0
+            description = "Main network interface"
+        }
+    }
+    */
+    [
+        {
+            line: 'resource aws_instance "web" {',
+            tokens: [
+                { startIndex: 0, type: "type.hcl" },
+                { startIndex: 8, type: "" },
+                { startIndex: 9, type: "string.hcl" },
+                { startIndex: 21, type: "" },
+                { startIndex: 22, type: "string.hcl" },
+                { startIndex: 27, type: "" },
+                { startIndex: 28, type: "delimiter.curly.hcl" },
+            ],
+        },
+        {
+            line: '  ami = "${var.foo}"',
+            tokens: [
+                { startIndex: 0, type: "" },
+                { startIndex: 2, type: "variable.hcl" },
+                { startIndex: 5, type: "" },
+                { startIndex: 6, type: "operator.hcl" },
+                { startIndex: 7, type: "" },
+                { startIndex: 8, type: "string.hcl" },
+                { startIndex: 9, type: "delimiter.hcl" },
+                { startIndex: 11, type: "keyword.var.hcl" },
+                { startIndex: 14, type: "delimiter.hcl" },
+                { startIndex: 15, type: "variable.hcl" },
+                { startIndex: 18, type: "delimiter.hcl" },
+                { startIndex: 19, type: "string.hcl" },
+            ],
+        },
+        {
+            line: "  security_groups = [",
+            tokens: [
+                { startIndex: 0, type: "" },
+                { startIndex: 2, type: "variable.hcl" },
+                { startIndex: 17, type: "" },
+                { startIndex: 18, type: "operator.hcl" },
+                { startIndex: 19, type: "" },
+                { startIndex: 20, type: "delimiter.square.hcl" },
+            ],
+        },
+        {
+            line: '    "foo",',
+            tokens: [
+                { startIndex: 0, type: "" },
+                { startIndex: 4, type: "string.hcl" },
+                { startIndex: 9, type: "delimiter.hcl" },
+            ],
+        },
+        {
+            line: '    "${aws_security_group.firewall.foo}"',
+            tokens: [
+                { startIndex: 0, type: "" },
+                { startIndex: 4, type: "string.hcl" },
+                { startIndex: 5, type: "delimiter.hcl" },
+                { startIndex: 7, type: "variable.hcl" },
+                { startIndex: 25, type: "delimiter.hcl" },
+                { startIndex: 26, type: "variable.hcl" },
+                { startIndex: 34, type: "delimiter.hcl" },
+                { startIndex: 35, type: "variable.hcl" },
+                { startIndex: 38, type: "delimiter.hcl" },
+                { startIndex: 39, type: "string.hcl" },
+            ],
+        },
+        {
+            line: "  ]",
+            tokens: [
+                { startIndex: 0, type: "" },
+                { startIndex: 2, type: "delimiter.square.hcl" },
+            ],
+        },
+        {
+            line: "  network_interface {",
+            tokens: [
+                { startIndex: 0, type: "" },
+                { startIndex: 2, type: "identifier.hcl" },
+                { startIndex: 20, type: "delimiter.curly.hcl" },
+            ],
+        },
+        {
+            line: "    device_index = 0",
+            tokens: [
+                { startIndex: 0, type: "" },
+                { startIndex: 4, type: "variable.hcl" },
+                { startIndex: 16, type: "" },
+                { startIndex: 17, type: "operator.hcl" },
+                { startIndex: 18, type: "" },
+                { startIndex: 19, type: "number.hcl" },
+            ],
+        },
+        {
+            line: '    description = "Main network interface"',
+            tokens: [
+                { startIndex: 0, type: "" },
+                { startIndex: 4, type: "variable.hcl" },
+                { startIndex: 15, type: "" },
+                { startIndex: 16, type: "operator.hcl" },
+                { startIndex: 17, type: "" },
+                { startIndex: 18, type: "string.hcl" },
+            ],
+        },
+        {
+            line: "  }",
+            tokens: [
+                { startIndex: 0, type: "" },
+                { startIndex: 2, type: "delimiter.curly.hcl" },
+            ],
+        },
+        {
+            line: "}",
+            tokens: [{ startIndex: 0, type: "delimiter.curly.hcl" }],
+        },
+    ],
+    /*
+    resource "aws_instance" "db" {
+        security_groups = "${aws_security_group.firewall.*.id}"
+        VPC = "foo"
+        depends_on = ["aws_instance.web"]
+    }
+    */
+    [
+        {
+            line: 'resource "aws_instance" "db" {',
+            tokens: [
+                { startIndex: 0, type: "type.hcl" },
+                { startIndex: 8, type: "" },
+                { startIndex: 9, type: "string.hcl" },
+                { startIndex: 23, type: "" },
+                { startIndex: 24, type: "string.hcl" },
+                { startIndex: 28, type: "" },
+                { startIndex: 29, type: "delimiter.curly.hcl" },
+            ],
+        },
+        {
+            line: '  security_groups = "${aws_security_group.firewall.*.id}"',
+            tokens: [
+                { startIndex: 0, type: "" },
+                { startIndex: 2, type: "variable.hcl" },
+                { startIndex: 17, type: "" },
+                { startIndex: 18, type: "operator.hcl" },
+                { startIndex: 19, type: "" },
+                { startIndex: 20, type: "string.hcl" },
+                { startIndex: 21, type: "delimiter.hcl" },
+                { startIndex: 23, type: "variable.hcl" },
+                { startIndex: 41, type: "delimiter.hcl" },
+                { startIndex: 42, type: "variable.hcl" },
+                { startIndex: 50, type: "delimiter.hcl" },
+                { startIndex: 51, type: "operator.hcl" },
+                { startIndex: 52, type: "delimiter.hcl" },
+                { startIndex: 53, type: "variable.hcl" },
+                { startIndex: 55, type: "delimiter.hcl" },
+                { startIndex: 56, type: "string.hcl" },
+            ],
+        },
+        {
+            line: '  VPC = "foo"',
+            tokens: [
+                { startIndex: 0, type: "" },
+                { startIndex: 2, type: "variable.hcl" },
+                { startIndex: 5, type: "" },
+                { startIndex: 6, type: "operator.hcl" },
+                { startIndex: 7, type: "" },
+                { startIndex: 8, type: "string.hcl" },
+            ],
+        },
+        {
+            line: '  depends_on = ["aws_instance.web"]',
+            tokens: [
+                { startIndex: 0, type: "" },
+                { startIndex: 2, type: "variable.hcl" },
+                { startIndex: 12, type: "" },
+                { startIndex: 13, type: "operator.hcl" },
+                { startIndex: 14, type: "" },
+                { startIndex: 15, type: "delimiter.square.hcl" },
+                { startIndex: 16, type: "string.hcl" },
+                { startIndex: 34, type: "delimiter.square.hcl" },
+            ],
+        },
+        {
+            line: "}",
+            tokens: [{ startIndex: 0, type: "delimiter.curly.hcl" }],
+        },
+    ],
+    /*
+    output "web_ip" {
+        value = "${aws_instance.web.private_ip}"
+    }
+    */
+    [
+        {
+            line: 'output "web_ip" {',
+            tokens: [
+                { startIndex: 0, type: "type.hcl" },
+                { startIndex: 6, type: "" },
+                { startIndex: 7, type: "string.hcl" },
+                { startIndex: 15, type: "" },
+                { startIndex: 16, type: "delimiter.curly.hcl" },
+            ],
+        },
+        {
+            line: 'value = "${aws_instance.web.private_ip}"',
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 5, type: "" },
+                { startIndex: 6, type: "operator.hcl" },
+                { startIndex: 7, type: "" },
+                { startIndex: 8, type: "string.hcl" },
+                { startIndex: 9, type: "delimiter.hcl" },
+                { startIndex: 11, type: "variable.hcl" },
+                { startIndex: 23, type: "delimiter.hcl" },
+                { startIndex: 24, type: "variable.hcl" },
+                { startIndex: 27, type: "delimiter.hcl" },
+                { startIndex: 28, type: "variable.hcl" },
+                { startIndex: 38, type: "delimiter.hcl" },
+                { startIndex: 39, type: "string.hcl" },
+            ],
+        },
+        {
+            line: "}",
+            tokens: [{ startIndex: 0, type: "delimiter.curly.hcl" }],
+        },
+    ],
+
+    [
+        {
+            line: 'foo = [1, 2, "foo"]',
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 3, type: "" },
+                { startIndex: 4, type: "operator.hcl" },
+                { startIndex: 5, type: "" },
+                { startIndex: 6, type: "delimiter.square.hcl" },
+                { startIndex: 7, type: "number.hcl" },
+                { startIndex: 8, type: "delimiter.hcl" },
+                { startIndex: 9, type: "" },
+                { startIndex: 10, type: "number.hcl" },
+                { startIndex: 11, type: "delimiter.hcl" },
+                { startIndex: 12, type: "" },
+                { startIndex: 13, type: "string.hcl" },
+                { startIndex: 18, type: "delimiter.square.hcl" },
+            ],
+        },
+    ],
+    [
+        {
+            line: 'foo = [1, 2, "foo",]',
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 3, type: "" },
+                { startIndex: 4, type: "operator.hcl" },
+                { startIndex: 5, type: "" },
+                { startIndex: 6, type: "delimiter.square.hcl" },
+                { startIndex: 7, type: "number.hcl" },
+                { startIndex: 8, type: "delimiter.hcl" },
+                { startIndex: 9, type: "" },
+                { startIndex: 10, type: "number.hcl" },
+                { startIndex: 11, type: "delimiter.hcl" },
+                { startIndex: 12, type: "" },
+                { startIndex: 13, type: "string.hcl" },
+                { startIndex: 18, type: "delimiter.hcl" },
+                { startIndex: 19, type: "delimiter.square.hcl" },
+            ],
+        },
+    ],
+    /*
+    default = {
+        "eu-west-1": "ami-b1cf19c6",
+    }
+    */
+    [
+        {
+            line: "default = {",
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 7, type: "" },
+                { startIndex: 8, type: "operator.hcl" },
+                { startIndex: 9, type: "" },
+                { startIndex: 10, type: "delimiter.curly.hcl" },
+            ],
+        },
+        {
+            line: '  "eu-west-1": "ami-b1cf19c6",',
+            tokens: [
+                { startIndex: 0, type: "" },
+                { startIndex: 2, type: "string.hcl" },
+                { startIndex: 13, type: "operator.hcl" },
+                { startIndex: 14, type: "" },
+                { startIndex: 15, type: "string.hcl" },
+                { startIndex: 29, type: "delimiter.hcl" },
+            ],
+        },
+        {
+            line: "}",
+            tokens: [{ startIndex: 0, type: "delimiter.curly.hcl" }],
+        },
+    ],
+    [
+        {
+            line: 'resource "foo" "bar" {}',
+            tokens: [
+                { startIndex: 0, type: "type.hcl" },
+                { startIndex: 8, type: "" },
+                { startIndex: 9, type: "string.hcl" },
+                { startIndex: 14, type: "" },
+                { startIndex: 15, type: "string.hcl" },
+                { startIndex: 20, type: "" },
+                { startIndex: 21, type: "delimiter.curly.hcl" },
+            ],
+        },
+    ],
+    [
+        {
+            line: 'foo = "bar"',
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 3, type: "" },
+                { startIndex: 4, type: "operator.hcl" },
+                { startIndex: 5, type: "" },
+                { startIndex: 6, type: "string.hcl" },
+            ],
+        },
+    ],
+    [
+        {
+            line: "bar = 7",
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 3, type: "" },
+                { startIndex: 4, type: "operator.hcl" },
+                { startIndex: 5, type: "" },
+                { startIndex: 6, type: "number.hcl" },
+            ],
+        },
+    ],
+    [
+        {
+            line: "baz = [1,2,3]",
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 3, type: "" },
+                { startIndex: 4, type: "operator.hcl" },
+                { startIndex: 5, type: "" },
+                { startIndex: 6, type: "delimiter.square.hcl" },
+                { startIndex: 7, type: "number.hcl" },
+                { startIndex: 8, type: "delimiter.hcl" },
+                { startIndex: 9, type: "number.hcl" },
+                { startIndex: 10, type: "delimiter.hcl" },
+                { startIndex: 11, type: "number.hcl" },
+                { startIndex: 12, type: "delimiter.square.hcl" },
+            ],
+        },
+    ],
+    [
+        {
+            line: "foo = -12",
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 3, type: "" },
+                { startIndex: 4, type: "operator.hcl" },
+                { startIndex: 5, type: "" },
+                { startIndex: 6, type: "operator.hcl" },
+                { startIndex: 7, type: "number.hcl" },
+            ],
+        },
+    ],
+    [
+        {
+            line: "bar = 3.14159",
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 3, type: "" },
+                { startIndex: 4, type: "operator.hcl" },
+                { startIndex: 5, type: "" },
+                { startIndex: 6, type: "number.float.hcl" },
+            ],
+        },
+    ],
+    [
+        {
+            line: "foo = true",
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 3, type: "" },
+                { startIndex: 4, type: "operator.hcl" },
+                { startIndex: 5, type: "" },
+                { startIndex: 6, type: "keyword.true.hcl" },
+            ],
+        },
+    ],
+    [
+        {
+            line: "bar = false",
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 3, type: "" },
+                { startIndex: 4, type: "operator.hcl" },
+                { startIndex: 5, type: "" },
+                { startIndex: 6, type: "keyword.false.hcl" },
+            ],
+        },
+    ],
+    /*
+    resource = [{
+        foo = [{
+            bar = {}
+        }]
+    }]
+    */
+    [
+        {
+            line: "resource = [{",
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 8, type: "" },
+                { startIndex: 9, type: "operator.hcl" },
+                { startIndex: 10, type: "" },
+                { startIndex: 11, type: "delimiter.square.hcl" },
+                { startIndex: 12, type: "delimiter.curly.hcl" },
+            ],
+        },
+        {
+            line: "  foo = [{",
+            tokens: [
+                { startIndex: 0, type: "" },
+                { startIndex: 2, type: "variable.hcl" },
+                { startIndex: 5, type: "" },
+                { startIndex: 6, type: "operator.hcl" },
+                { startIndex: 7, type: "" },
+                { startIndex: 8, type: "delimiter.square.hcl" },
+                { startIndex: 9, type: "delimiter.curly.hcl" },
+            ],
+        },
+        {
+            line: "    bar = {}",
+            tokens: [
+                { startIndex: 0, type: "" },
+                { startIndex: 4, type: "variable.hcl" },
+                { startIndex: 7, type: "" },
+                { startIndex: 8, type: "operator.hcl" },
+                { startIndex: 9, type: "" },
+                { startIndex: 10, type: "delimiter.curly.hcl" },
+            ],
+        },
+        {
+            line: "  }]",
+            tokens: [
+                { startIndex: 0, type: "" },
+                { startIndex: 2, type: "delimiter.curly.hcl" },
+                { startIndex: 3, type: "delimiter.square.hcl" },
+            ],
+        },
+        {
+            line: "}]",
+            tokens: [
+                { startIndex: 0, type: "delimiter.curly.hcl" },
+                { startIndex: 1, type: "delimiter.square.hcl" },
+            ],
+        },
+    ],
+    [
+        {
+            line: 'bar = "${file("bing/bong.txt")}"',
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 3, type: "" },
+                { startIndex: 4, type: "operator.hcl" },
+                { startIndex: 5, type: "" },
+                { startIndex: 6, type: "string.hcl" },
+                { startIndex: 7, type: "delimiter.hcl" },
+                { startIndex: 9, type: "type.hcl" },
+                { startIndex: 13, type: "delimiter.parenthesis.hcl" },
+                { startIndex: 14, type: "string.hcl" },
+                { startIndex: 29, type: "delimiter.parenthesis.hcl" },
+                { startIndex: 30, type: "delimiter.hcl" },
+                { startIndex: 31, type: "string.hcl" },
+            ],
+        },
+    ],
+    [
+        {
+            line: 'foo-bar="baz"',
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 7, type: "operator.hcl" },
+                { startIndex: 8, type: "string.hcl" },
+            ],
+        },
+    ],
+    /*
+     key "foo/" {
+        policy = "write"
+    }
+    */
+    [
+        {
+            line: 'key "foo/" {',
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 3, type: "" },
+                { startIndex: 4, type: "string.hcl" },
+                { startIndex: 10, type: "" },
+                { startIndex: 11, type: "delimiter.curly.hcl" },
+            ],
+        },
+        {
+            line: '  policy = "write"',
+            tokens: [
+                { startIndex: 0, type: "" },
+                { startIndex: 2, type: "variable.hcl" },
+                { startIndex: 8, type: "" },
+                { startIndex: 9, type: "operator.hcl" },
+                { startIndex: 10, type: "" },
+                { startIndex: 11, type: "string.hcl" },
+            ],
+        },
+        {
+            line: "}",
+            tokens: [{ startIndex: 0, type: "delimiter.curly.hcl" }],
+        },
+    ],
+    [
+        {
+            line: 'foo = "bar\\"baz\\\\n"',
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 3, type: "" },
+                { startIndex: 4, type: "operator.hcl" },
+                { startIndex: 5, type: "" },
+                { startIndex: 6, type: "string.hcl" },
+                { startIndex: 10, type: "string.escape.hcl" },
+                { startIndex: 12, type: "string.hcl" },
+                { startIndex: 15, type: "string.escape.hcl" },
+                { startIndex: 17, type: "string.hcl" },
+            ],
+        },
+    ],
+    [
+        {
+            line: 'bar = "new\\nline"',
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 3, type: "" },
+                { startIndex: 4, type: "operator.hcl" },
+                { startIndex: 5, type: "" },
+                { startIndex: 6, type: "string.hcl" },
+                { startIndex: 10, type: "string.escape.hcl" },
+                { startIndex: 12, type: "string.hcl" },
+            ],
+        },
+    ],
+    [
+        {
+            line: 'qux = "back\\\\slash"',
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 3, type: "" },
+                { startIndex: 4, type: "operator.hcl" },
+                { startIndex: 5, type: "" },
+                { startIndex: 6, type: "string.hcl" },
+                { startIndex: 11, type: "string.escape.hcl" },
+                { startIndex: 13, type: "string.hcl" },
+            ],
+        },
+    ],
+    [
+        {
+            line: 'qax = "slash\\\\:colon"',
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 3, type: "" },
+                { startIndex: 4, type: "operator.hcl" },
+                { startIndex: 5, type: "" },
+                { startIndex: 6, type: "string.hcl" },
+                { startIndex: 12, type: "string.escape.hcl" },
+                { startIndex: 14, type: "string.hcl" },
+            ],
+        },
+    ],
+    [
+        {
+            line: 'nested = "${HH\\\\:mm\\\\:ss}"',
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 6, type: "" },
+                { startIndex: 7, type: "operator.hcl" },
+                { startIndex: 8, type: "" },
+                { startIndex: 9, type: "string.hcl" },
+                { startIndex: 10, type: "delimiter.hcl" },
+                { startIndex: 12, type: "variable.hcl" },
+                { startIndex: 14, type: "" },
+                { startIndex: 16, type: "operator.hcl" },
+                { startIndex: 17, type: "variable.hcl" },
+                { startIndex: 19, type: "" },
+                { startIndex: 21, type: "operator.hcl" },
+                { startIndex: 22, type: "variable.hcl" },
+                { startIndex: 24, type: "delimiter.hcl" },
+                { startIndex: 25, type: "string.hcl" },
+            ],
+        },
+    ],
+    [
+        {
+            line: 'nestedquotes = "${"\\"stringwrappedinquotes\\""}"',
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 12, type: "" },
+                { startIndex: 13, type: "operator.hcl" },
+                { startIndex: 14, type: "" },
+                { startIndex: 15, type: "string.hcl" },
+                { startIndex: 16, type: "delimiter.hcl" },
+                { startIndex: 18, type: "string.hcl" },
+                { startIndex: 19, type: "string.escape.hcl" },
+                { startIndex: 21, type: "string.hcl" },
+                { startIndex: 42, type: "string.escape.hcl" },
+                { startIndex: 44, type: "string.hcl" },
+                { startIndex: 45, type: "delimiter.hcl" },
+                { startIndex: 46, type: "string.hcl" },
+            ],
+        },
+    ],
+    /*
+    foo = <<EOF
+    bar
+    EOF
+    */
+    [
+        {
+            line: "foo = <<EOF",
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 3, type: "" },
+                { startIndex: 4, type: "operator.hcl" },
+                { startIndex: 5, type: "" },
+                { startIndex: 6, type: "string.heredoc.delimiter.hcl" },
+            ],
+        },
+        {
+            line: "bar",
+            tokens: [{ startIndex: 0, type: "string.heredoc.hcl" }],
+        },
+        {
+            line: "EOF",
+            tokens: [{ startIndex: 0, type: "string.heredoc.delimiter.hcl" }],
+        },
+    ],
+    [
+        {
+            line: "foo = <EOF",
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 3, type: "" },
+                { startIndex: 4, type: "operator.hcl" },
+                { startIndex: 5, type: "" },
+                { startIndex: 6, type: "delimiter.angle.hcl" },
+                { startIndex: 7, type: "variable.hcl" },
+            ],
+        },
+    ],
+    [
+        {
+            line: "foo = <<-EOF",
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 3, type: "" },
+                { startIndex: 4, type: "operator.hcl" },
+                { startIndex: 5, type: "" },
+                { startIndex: 6, type: "string.heredoc.delimiter.hcl" },
+            ],
+        },
+    ],
+    /*
+    multiline_literal = "hello
+    world"
+    foo = "bar"
+    */
+    [
+        {
+            line: 'multiline_literal = "hello',
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 17, type: "" },
+                { startIndex: 18, type: "operator.hcl" },
+                { startIndex: 19, type: "" },
+                { startIndex: 20, type: "string.hcl" },
+            ],
+        },
+        {
+            line: '  world"',
+            tokens: [{ startIndex: 0, type: "string.hcl" }],
+        },
+        {
+            line: 'foo = "bar"',
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 3, type: "" },
+                { startIndex: 4, type: "operator.hcl" },
+                { startIndex: 5, type: "" },
+                { startIndex: 6, type: "string.hcl" },
+            ],
+        },
+    ],
+    /*
+    multiline_literal_with_hil = "${hello
+    world}"
+    */
+    [
+        {
+            line: 'multiline_literal_with_hil = "${hello',
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 26, type: "" },
+                { startIndex: 27, type: "operator.hcl" },
+                { startIndex: 28, type: "" },
+                { startIndex: 29, type: "string.hcl" },
+                { startIndex: 30, type: "delimiter.hcl" },
+                { startIndex: 32, type: "variable.hcl" },
+            ],
+        },
+        {
+            line: ' world}"',
+            tokens: [
+                { startIndex: 0, type: "" },
+                { startIndex: 1, type: "variable.hcl" },
+                { startIndex: 6, type: "delimiter.hcl" },
+                { startIndex: 7, type: "string.hcl" },
+            ],
+        },
+        {
+            line: 'foo = "bar"',
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 3, type: "" },
+                { startIndex: 4, type: "operator.hcl" },
+                { startIndex: 5, type: "" },
+                { startIndex: 6, type: "string.hcl" },
+            ],
+        },
+    ],
+    // scientific numbers
+    [
+        {
+            line: "a = 1e-10",
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 1, type: "" },
+                { startIndex: 2, type: "operator.hcl" },
+                { startIndex: 3, type: "" },
+                { startIndex: 4, type: "number.float.hcl" },
+            ],
+        },
+    ],
+    [
+        {
+            line: "b = 1e+10",
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 1, type: "" },
+                { startIndex: 2, type: "operator.hcl" },
+                { startIndex: 3, type: "" },
+                { startIndex: 4, type: "number.float.hcl" },
+            ],
+        },
+    ],
+    [
+        {
+            line: "c = 1e10",
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 1, type: "" },
+                { startIndex: 2, type: "operator.hcl" },
+                { startIndex: 3, type: "" },
+                { startIndex: 4, type: "number.float.hcl" },
+            ],
+        },
+    ],
+    [
+        {
+            line: "d = 1.2e-10",
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 1, type: "" },
+                { startIndex: 2, type: "operator.hcl" },
+                { startIndex: 3, type: "" },
+                { startIndex: 4, type: "number.float.hcl" },
+            ],
+        },
+    ],
+    [
+        {
+            line: "e = 1.2e+10",
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 1, type: "" },
+                { startIndex: 2, type: "operator.hcl" },
+                { startIndex: 3, type: "" },
+                { startIndex: 4, type: "number.float.hcl" },
+            ],
+        },
+    ],
+    [
+        {
+            line: "f = 1.2e10",
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 1, type: "" },
+                { startIndex: 2, type: "operator.hcl" },
+                { startIndex: 3, type: "" },
+                { startIndex: 4, type: "number.float.hcl" },
+            ],
+        },
+    ],
+    [
+        {
+            line: 'map.key1 = "Value"',
+            tokens: [
+                { startIndex: 0, type: "variable.hcl" },
+                { startIndex: 3, type: "delimiter.hcl" },
+                { startIndex: 4, type: "variable.hcl" },
+                { startIndex: 8, type: "" },
+                { startIndex: 9, type: "operator.hcl" },
+                { startIndex: 10, type: "" },
+                { startIndex: 11, type: "string.hcl" },
+            ],
+        },
+    ],
+]);

src/hcl/hcl.ts

@@ -9,245 +9,205 @@ import IRichLanguageConfiguration = monaco.languages.LanguageConfiguration;
 import ILanguage = monaco.languages.IMonarchLanguage;
 
 export const conf: IRichLanguageConfiguration = {
-	comments: {
-		lineComment: '//',
-		blockComment: ['/*', '*/']
-	},
-	brackets: [
-		['{', '}'],
-		['[', ']'],
-		['(', ')']
-	],
-	autoClosingPairs: [
-		{ open: '{', close: '}' },
-		{ open: '[', close: ']' },
-		{ open: '(', close: ')' },
-		{ open: '"', close: '"', notIn: ['string'] },
-		{ open: "'", close: "'", notIn: ['string', 'comment'] }
-	],
-	surroundingPairs: [
-		{ open: '{', close: '}' },
-		{ open: '[', close: ']' },
-		{ open: '(', close: ')' },
-		{ open: '"', close: '"' },
-		{ open: "'", close: "'" }
-	]
+    comments: {
+        lineComment: '//',
+        blockComment: ['/*', '*/'],
+    },
+    brackets: [
+        ['{', '}'],
+        ['[', ']'],
+        ['(', ')']
+    ],
+    autoClosingPairs: [
+        { open: '{', close: '}' },
+        { open: '[', close: ']' },
+        { open: '(', close: ')' },
+        { open: '"', close: '"', notIn: ['string'] },
+    ],
+    surroundingPairs: [
+        { open: '{', close: '}' },
+        { open: '[', close: ']' },
+        { open: '(', close: ')' },
+        { open: '"', close: '"' },
+    ]
 };
 
 export const language = <ILanguage>{
-	defaultToken: '',
-	tokenPostfix: '.tf',
-
-	keywords: [
-		'var',
-		'local',
-		'module',
-		'data',
-		'path',
-		'terraform',
-		'resource',
-		'provider',
-		'variable',
-		'output',
-		'locals',
-		'any',
-		'string',
-		'number',
-		'bool',
-		'abs',
-		'ceil',
-		'floor',
-		'log',
-		'max',
-		'min',
-		'pow',
-		'signum',
-		'chomp',
-		'format',
-		'formatlist',
-		'indent',
-		'join',
-		'lower',
-		'regex',
-		'regexall',
-		'replace',
-		'split',
-		'strrev',
-		'substr',
-		'title',
-		'trimspace',
-		'upper',
-		'chunklist',
-		'coalesce',
-		'coalescelist',
-		'compact',
-		'concat',
-		'contains',
-		'distinct',
-		'element',
-		'flatten',
-		'index',
-		'keys',
-		'length',
-		'list',
-		'lookup',
-		'map',
-		'matchkeys',
-		'merge',
-		'range',
-		'reverse',
-		'setintersection',
-		'setproduct',
-		'setunion',
-		'slice',
-		'sort',
-		'transpose',
-		'values',
-		'zipmap',
-		'base64decode',
-		'base64encode',
-		'base64gzip',
-		'csvdecode',
-		'jsondecode',
-		'jsonencode',
-		'urlencode',
-		'yamldecode',
-		'yamlencode',
-		'abspath',
-		'dirname',
-		'pathexpand',
-		'basename',
-		'file',
-		'fileexists',
-		'fileset',
-		'filebase64',
-		'templatefile',
-		'formatdate',
-		'timeadd',
-		'timestamp',
-		'base64sha256',
-		'base64sha512',
-		'bcrypt',
-		'filebase64sha256',
-		'filebase64sha512',
-		'filemd5',
-		'filemd1',
-		'filesha256',
-		'filesha512',
-		'md5',
-		'rsadecrypt',
-		'sha1',
-		'sha256',
-		'sha512',
-		'uuid',
-		'uuidv5',
-		'cidrhost',
-		'cidrnetmask',
-		'cidrsubnet',
-		'tobool',
-		'tolist',
-		'tomap',
-		'tonumber',
-		'toset',
-		'tostring',
-		'true',
-		'false',
-		'null',
-		'if ',
-		'else ',
-		'endif ',
-		'for ',
-		'in',
-		'endfor'
-	],
-
-	operators: [
-		'>=',
-		'<=',
-		'==',
-		'!=',
-		'+',
-		'-',
-		'*',
-		'/',
-		'%',
-		'&&',
-		'||',
-		'!',
-		'<',
-		'>',
-		'?',
-		'...',
-		':'
-	],
-
-	// we include these common regular expressions
-	symbols: /[=><!~?:&|+\-*\/\^%]+/,
-	escapes: /\\(?:[abfnrtv\\"']|x[0-9A-Fa-f]{1,4}|u[0-9A-Fa-f]{4}|U[0-9A-Fa-f]{8})/,
-	variable: /\${?[\w]+}?/,
-
-	// The main tokenizer for our languages
-	tokenizer: {
-		root: [
-			// identifiers and keywords
-			[
-				/[a-zA-Z_]\w*/,
-				{
-					cases: {
-						'@keywords': { token: 'keyword.$0' },
-						'@default': 'identifier'
-					}
-				}
-			],
-
-			// whitespace
-			{ include: '@whitespace' },
-
-			// delimiters and operators
-			[/[{}()\[\]]/, '@brackets'],
-			[/[<>](?!@symbols)/, '@brackets'],
-			[
-				/@symbols/,
-				{
-					cases: {
-						'@operators': 'delimiter',
-						'@default': ''
-					}
-				}
-			],
-
-			// numbers
-			[/\d*\d+[eE]([\-+]?\d+)?/, 'number.float'],
-			[/\d*\.\d+([eE][\-+]?\d+)?/, 'number.float'],
-			[/\d[\d']*/, 'number'],
-			[/\d/, 'number'],
-
-			// delimiter: after number because of .\d floats
-			[/[;,.]/, 'delimiter'],
-
-			// strings
-			[/"([^"\\]|\\.)*$/, 'string.invalid'], // non-teminated string
-			[/"/, 'string', '@string']
-		],
-
-		whitespace: [
-			[/[ \t\r\n]+/, ''],
-			[/\/\*/, 'comment', '@comment'],
-			[/\/\/.*$/, 'comment'],
-			[/#.*$/, 'comment']
-		],
-
-		comment: [
-			[/[^\/*]+/, 'comment'],
-			[/\*\//, 'comment', '@pop'],
-			[/[\/*]/, 'comment']
-		],
-
-		string: [
-			[/[^\\"]+/, 'string'],
-			[/@escapes/, 'string.escape'],
-			[/\\./, 'string.escape.invalid'],
-			[/"/, 'string', '@pop']
-		]
-	}
+    defaultToken: "",
+    tokenPostfix: ".hcl",
+
+    keywords: [
+        "var",
+        "local",
+        "path",
+        "for_each",
+        "any",
+        "string",
+        "number",
+        "bool",
+        "true",
+        "false",
+        "null",
+        "if ",
+        "else ",
+        "endif ",
+        "for ",
+        "in",
+        "endfor",
+    ],
+
+    operators: [
+        "=",
+        ">=",
+        "<=",
+        "==",
+        "!=",
+        "+",
+        "-",
+        "*",
+        "/",
+        "%",
+        "&&",
+        "||",
+        "!",
+        "<",
+        ">",
+        "?",
+        "...",
+        ":",
+    ],
+
+    symbols: /[=><!~?:&|+\-*\/\^%]+/,
+    escapes: /\\(?:[abfnrtv\\"']|x[0-9A-Fa-f]{1,4}|u[0-9A-Fa-f]{4}|U[0-9A-Fa-f]{8})/,
+    terraformFunctions: /(abs|ceil|floor|log|max|min|pow|signum|chomp|format|formatlist|indent|join|lower|regex|regexall|replace|split|strrev|substr|title|trimspace|upper|chunklist|coalesce|coalescelist|compact|concat|contains|distinct|element|flatten|index|keys|length|list|lookup|map|matchkeys|merge|range|reverse|setintersection|setproduct|setunion|slice|sort|transpose|values|zipmap|base64decode|base64encode|base64gzip|csvdecode|jsondecode|jsonencode|urlencode|yamldecode|yamlencode|abspath|dirname|pathexpand|basename|file|fileexists|fileset|filebase64|templatefile|formatdate|timeadd|timestamp|base64sha256|base64sha512|bcrypt|filebase64sha256|filebase64sha512|filemd5|filemd1|filesha256|filesha512|md5|rsadecrypt|sha1|sha256|sha512|uuid|uuidv5|cidrhost|cidrnetmask|cidrsubnet|tobool|tolist|tomap|tonumber|toset|tostring)/,
+    terraformMainBlocks: /(module|data|terraform|resource|provider|variable|output|locals)/,
+    tokenizer: {
+        root: [
+            // highlight main blocks
+            [
+                /^@terraformMainBlocks([ \t]*)([\w-]+|"[\w-]+"|)([ \t]*)([\w-]+|"[\w-]+"|)([ \t]*)(\{)/,
+                [
+                    "type",
+                    "",
+                    "string",
+                    "",
+                    "string",
+                    "",
+                    "@brackets",
+                ],
+            ],
+            // highlight all the remaining blocks
+            [
+                /(\w+[ \t]+)([ \t]*)([\w-]+|"[\w-]+"|)([ \t]*)([\w-]+|"[\w-]+"|)([ \t]*)(\{)/,
+                [
+                    "identifier",
+                    "",
+                    "string",
+                    "",
+                    "string",
+                    "",
+                    "@brackets",
+                ],
+            ],
+            // highlight block
+            [
+                /(\w+[ \t]+)([ \t]*)([\w-]+|"[\w-]+"|)([ \t]*)([\w-]+|"[\w-]+"|)(=)(\{)/,
+                [
+                    "identifier",
+                    "",
+                    "string",
+                    "",
+                    "operator",
+                    "",
+                    "@brackets",
+                ],
+            ],
+            // terraform general highlight - shared with expressions
+            { include: "@terraform" },
+        ],
+        terraform : [
+            // highlight terraform functions
+            [/@terraformFunctions(\()/, ['type', '@brackets']],
+            // all other words are variables or keywords
+            [
+                /[a-zA-Z_]\w*-*/, // must work with variables such as foo-bar and also with negative numbers
+                {
+                    cases: {
+                        "@keywords": { token: "keyword.$0" },
+                        "@default": "variable",
+                    },
+                },
+            ],
+            { include: "@whitespace" },
+            { include: '@heredoc' },
+            // delimiters and operators
+            [/[{}()\[\]]/, "@brackets"],
+            [/[<>](?!@symbols)/, "@brackets"],
+            [
+                /@symbols/,
+                {
+                    cases: {
+                        "@operators": "operator",
+                        "@default": "",
+                    },
+                },
+            ],
+            // numbers
+            [/\d*\d+[eE]([\-+]?\d+)?/, "number.float"],
+            [/\d*\.\d+([eE][\-+]?\d+)?/, "number.float"],
+            [/\d[\d']*/, "number"],
+            [/\d/, "number"],
+            [/[;,.]/, "delimiter"], // delimiter: after number because of .\d floats
+            // strings
+            [/"/, "string", "@string"], // this will include expressions
+            [/'/, "invalid"],
+        ],
+        heredoc: [
+            [
+                /<<[-]*\s*["]?([\w\-]+)["]?/,
+                { token: 'string.heredoc.delimiter', next: '@heredocBody.$1' },
+            ],
+        ],
+        heredocBody: [
+            [
+                /^([\w\-]+)$/,
+                {
+                    cases: {
+                        '$1==$S2': [{ token: 'string.heredoc.delimiter', next: '@popall' }],
+                        '@default': 'string.heredoc',
+                    },
+                },
+            ],
+            [/./, 'string.heredoc'],
+        ],
+        whitespace: [
+            [/[ \t\r\n]+/, ""],
+            [/\/\*/, "comment", "@comment"],
+            [/\/\/.*$/, "comment"],
+            [/#.*$/, "comment"],
+        ],
+        comment: [
+            [/[^\/*]+/, "comment"],
+            [/\*\//, "comment", "@pop"],
+            [/[\/*]/, "comment"],
+        ],
+        string: [
+            [/\$\{/, { token: "delimiter", next: "@stringExpression" }],
+            [/[^\\"\$]+/, "string"],
+            [/@escapes/, "string.escape"],
+            [/\\./, "string.escape.invalid"],
+            [/"/, "string", "@popall"],
+        ],
+        stringInsideExpression: [
+            [/[^\\"]+/, "string"],
+            [/@escapes/, "string.escape"],
+            [/\\./, "string.escape.invalid"],
+            [/"/, "string", "@pop"],
+        ],
+        stringExpression: [
+            [/\}/, { token: "delimiter", next: "@pop" }],
+              [/"/, "string", "@stringInsideExpression"],
+            { include: "@terraform" },
+        ],
+    },
 };