add vscode syntax plugin

resources/editor_plugins/vscode/.vscodeignore

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+.vscode/**
+.vscode-test/**
+.gitignore
+vsc-extension-quickstart.md

resources/editor_plugins/vscode/example.c3

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+module stack <Type>;
+// Above: the parameterized type is applied to the entire module.
+import std::mem;
+
+struct Stack
+{
+    usize capacity;
+    usize size;
+    Type* elems;
+}
+
+// The type methods offers dot syntax calls,
+// so this function can either be called 
+// Stack.push(&my_stack, ...) or
+// my_stack.push(...)
+fn void Stack.push(Stack* this, Type element)
+{
+    if (this.capacity == this.size)
+    {
+        this.capacity *= 2;
+        this.elems = mem::realloc(this.elems, $sizeof(Type) * this.capacity);
+    }
+    this.elems[this.size++] = element;
+}
+
+fn Type Stack.pop(Stack* this)
+{
+    assert(this.size > 0);
+    return this.elems[--this.size];
+}
+
+fn bool Stack.empty(Stack* this)
+{
+    return !this.size;
+}

resources/editor_plugins/vscode/language-configuration.json

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+{
+    "comments": {
+        // symbol used for single line comment. Remove this entry if your language does not support line comments
+        "lineComment": "//",
+        // symbols used for start and end a block comment. Remove this entry if your language does not support block comments
+        "blockComment": [ "/*", "*/" ]
+    },
+    // symbols used as brackets
+    "brackets": [
+        ["{", "}"],
+        ["[", "]"],
+        ["(", ")"]
+    ],
+    // symbols that are auto closed when typing
+    "autoClosingPairs": [
+        ["{", "}"],
+        ["[", "]"],
+        ["(", ")"],
+        ["\"", "\""],
+        ["'", "'"]
+    ],
+    // symbols that can be used to surround a selection
+    "surroundingPairs": [
+        ["{", "}"],
+        ["[", "]"],
+        ["(", ")"],
+        ["\"", "\""],
+        ["'", "'"]
+    ]
+}

resources/editor_plugins/vscode/package.json

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+{
+    "name": "c3-vscode",
+    "displayName": "c3-vscode",
+    "description": "C3 Language Support for VSCode",
+    "version": "0.0.1",
+    "engines": {
+        "vscode": "^1.63.0"
+    },
+    "categories": [
+        "Programming Languages"
+    ],
+    "contributes": {
+        "languages": [{
+            "id": "c3",
+            "aliases": ["C3", "c3"],
+            "extensions": ["c3"],
+            "configuration": "./language-configuration.json"
+        }],
+        "grammars": [{
+            "language": "c3",
+            "scopeName": "source.c3",
+            "path": "./syntaxes/c3.tmLanguage.json"
+        }]
+    }
+}

resources/editor_plugins/vscode/syntaxes/c3.tmLanguage.json

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+{
+	"$schema": "https://raw.githubusercontent.com/martinring/tmlanguage/master/tmlanguage.json",
+	"name": "C3",
+	"patterns": [
+		{ "include": "#keywords"  },
+		{ "include": "#comments"  },
+		{ "include": "#strings"   },
+		{ "include": "#numbers"   },
+		{ "include": "#types"     },
+		{ "include": "#support"   },
+		{ "include": "#operators" }
+	],
+	"repository": {
+		"keywords": {
+			"patterns": [
+				{
+					"name": "keyword",
+					"match": "\\b(extern|break|case|const|continue|default)\\b"
+				},
+				{
+					"name": "keyword",
+					"match": "\\b(do|else|for|goto|if|return|null)\\b"
+				},
+				{
+					"name": "keyword",
+					"match": "\\b(define|local|errtype|module|as|import)\\b"
+				},
+				{
+					"name": "keyword",
+					"match": "\\b(generic|switch|typedef|volatile)\\b"
+				},
+				{
+					"name": "keyword",
+					"match": "\\b(while|fn|nil|next|in|$for|$case)\\b"
+				},
+				{
+					"name": "keyword",
+					"match": "\\b(%switch|$default|$if|$elif|$else)\\b"
+				},
+				{
+					"name": "keyword",
+					"match": "\\b(true|false)\\b"
+				}
+			]
+		},
+		"comments": {
+			"patterns": [
+				{
+					"name": "comment.line",
+					"begin": "//",
+					"end": "$"
+				},
+				{
+					"name": "comment.block",
+					"begin": "/\\*",
+					"end": "\\*/"
+				}
+			]
+		},
+		"strings": {
+			"patterns": [
+				{
+					"name": "string.quoted.double",
+					"patterns": [ {"include": "#stringcontent"} ],
+					"begin": "\"",
+					"end": "\""
+				},
+				{
+					"name": "string.quoted.double",
+					"patterns": [ {"include": "#stringcontent"} ],
+					"begin": "b64\"",
+					"end": "\""
+				},
+				{
+					"name": "string.quoted.double",
+					"patterns": [ {"include": "#stringcontent"} ],
+					"begin": "x\"",
+					"end": "\""
+				},
+				{
+					"name": "string.quoted.single",
+					"patterns": [ {"include": "#stringcontent"} ],
+					"begin": "'",
+					"end": "'"
+				},
+				{
+					"name": "string.quoted.single",
+					"patterns": [ {"include": "#stringcontent"} ],
+					"begin": "b64'",
+					"end": "'"
+				},
+				{
+					"name": "string.quoted.single",
+					"patterns": [ {"include": "#stringcontent"} ],
+					"begin": "x'",
+					"end": "'"
+				}
+			]
+		},
+		"stringcontent": {
+			"patterns": [
+			  {
+				"name": "constant.character.escape",
+				"match": "\\\\([nrt'\"\\\\]|(x[0-9a-fA-F]{2})|(u\\{[0-9a-fA-F]+\\}))"
+			  },
+			  {
+				"name": "invalid.illegal.unrecognized-string-escape",
+				"match": "\\\\."
+			  }
+			]
+		  },
+		"numbers": {
+			"patterns": [
+				{
+					"name": "constant.numeric",
+					"match": "\\b[0-9]\\.[0-9]+\\b"
+				},
+				{
+					"name": "constant.numeric",
+					"match": "\\b[0-9]+\\b"
+				},
+				{
+					"name": "constant.numeric",
+					"match": "\\b0x[a-fA-F0-9_]+\\b"
+				},
+				{
+					"name": "constant.numeric",
+					"match": "\\b0o[0-7_]+\\b"
+				},
+				{
+					"name": "constant.numeric",
+					"match": "\\b0b[01_]+\\b"
+				}
+			]
+		},
+		"types": {
+			"name": "storage.type",
+			"match": "\\b(double|usize|type|Type|bool|char|enum|float|int|uint|long|ulong|short|ushort|struct|void)\\b"
+		},
+		"support": {
+			"name": "support.function.builtin",
+			"match": "\\$[_a-zA-Z][_a-zA-Z0-9]*"
+		},
+		"operators": {
+			"name": "keyword.operator",
+			"match": "(\\+|-|\\.|%|&|\\||=|<|>|!|\\^|\\*|/|::)=?"
+		}
+	},
+	"scopeName": "source.c3"
+}