feat: renderSync, parseAndRenderSync and renderFileSync, see #48

src/render/value.ts

@@ -5,11 +5,15 @@ import { parseLiteral } from '../parser/literal'
 export class Value {
   private str: string
 
-  public constructor (str: string = '') {
+  public constructor (str: string) {
     this.str = str
   }
 
-  public evaluate (ctx: Context) {
+  public async evaluate (ctx: Context) {
+    return this.evaluateSync(ctx)
+  }
+
+  public evaluateSync (ctx: Context) {
     const literalValue = parseLiteral(this.str)
     if (literalValue !== undefined) {
       return literalValue
@@ -17,7 +21,11 @@ export class Value {
     return ctx.get(this.str)
   }
 
-  public value (ctx: Context) {
-    return toValue(this.evaluate(ctx))
+  public async value (ctx: Context) {
+    return toValue(await this.evaluate(ctx))
+  }
+
+  public valueSync (ctx: Context) {
+    return toValue(this.evaluateSync(ctx))
   }
 }