initial commit

src/bindx/MetaUtils.hx

@@ -0,0 +1,69 @@
+package bindx;
+
+import haxe.macro.Type;
+import haxe.macro.Expr;
+import haxe.macro.Context;
+
+using haxe.macro.Tools;
+using Lambda;
+
+class MetaUtils {
+
+	static public inline var BINDABLE_META = ":bindable";
+
+	static public function findParam(meta:MetadataEntry, name:String):Expr {
+        if (meta.params == null) {
+            return null;
+        }
+        for (p in meta.params) {
+            switch (p.expr) {
+                case EBinop(OpAssign, e1, e2):
+                    if (e1.toString() == name) return {expr:e2.expr, pos:p.pos};
+                case _:
+                    Context.warning('Bindable arguments syntax error. Supported syntax: (flag1=true, flag2=false)', p.pos);
+            }
+        }
+        return null;
+    }
+
+    static public inline function bindableMeta(meta:Metadata):MetadataEntry
+        return meta.find(function (it) return it.name == BINDABLE_META);
+}
+
+class FieldMetaUtils {
+	static public inline function bindableMeta(field:Field):MetadataEntry
+        return MetaUtils.bindableMeta(field.meta);
+
+    static public inline function hasBindableMeta(field:Field):Bool
+    	return bindableMeta(field) != null;
+}
+
+class ClassFieldMetaUtils {
+	static public inline function bindableMeta(field:ClassField):MetadataEntry
+        return MetaUtils.bindableMeta(field.meta.get());
+
+    static public inline function hasBindableMeta(field:ClassField):Bool
+    	return bindableMeta(field) != null;
+}
+
+class ClassTypeMetaUtils {
+	static public inline function bindableMeta(classType:ClassType):MetadataEntry
+        return MetaUtils.bindableMeta(classType.meta.get());
+
+    static public inline function hasBindableMeta(classType:ClassType):Bool
+    	return bindableMeta(classType) != null;
+}
+
+class ExprMetaUtils {
+	static public inline function isTrue(expr:Expr):Bool
+		return expr.expr.match(EConst(CIdent("true")));
+
+	static public inline function isFalse(expr:Expr):Bool
+		return expr.expr.match(EConst(CIdent("false")));
+
+	static public inline function isNotNullAndTrue(expr:Expr):Bool
+		return expr != null && isTrue(expr);
+
+	static public inline function isNullOrTrue(expr:Expr):Bool
+		return expr == null || isTrue(expr);
+}