IDENTIFIER_REGEX

src/blocks/Block.ts

@@ -1,5 +1,5 @@
 import { Argument, Attribute } from '../arguments';
-import { TerraformArgs, TerraformElement, Util } from '../utils';
+import { IDENTIFIER_REGEX, TerraformArgs, TerraformElement, Util } from '../utils';
 
 /**
  * @category Block
@@ -140,7 +140,7 @@ export abstract class Block<Args extends TerraformArgs = TerraformArgs> extends
   }
 
   #validateIdentifier(identifier: string): void {
-    if (!identifier.match(/^[a-zA-Z_\-]{1}[0-9a-zA-Z_\-]*$/)) {
+    if (!identifier.match(IDENTIFIER_REGEX)) {
       throw new Error(`Invalid identifier: ${identifier}`);
     }
   }

src/utils/Util.ts

@@ -1,5 +1,5 @@
 import { Block } from '../blocks';
-import { TerraformArgs, TerraformElement } from '.';
+import { IDENTIFIER_REGEX, TerraformArgs, TerraformElement } from '.';
 
 export class Util {
 
@@ -37,7 +37,6 @@ export class Util {
       return true;
     }
     throw new Error(`Invalid value: ${value}`);
-
   }
 
   static argumentToString(key: string, value: any): string {
@@ -46,8 +45,7 @@ export class Util {
         return '';
       }
 
-      // Escape key if it contains special characters.
-      if (!key.match(/^[a-zA-Z0-9_]+$/)) {
+      if (!key.match(IDENTIFIER_REGEX)) {
         key = `"${key}"`;
       }
 

src/utils/constants.ts

@@ -0,0 +1 @@
+export const IDENTIFIER_REGEX = /^[a-zA-Z_\-]{1}[0-9a-zA-Z_\-]*$/;

src/utils/index.ts

@@ -1,3 +1,4 @@
+export * from './constants';
 export * from './types';
 export * from './TerraformElement';
 export * from './Util';