config: parse multi-args in interpolations [GH-282]

CHANGELOG.md

@@ -13,6 +13,7 @@ BUG FIXES:
   * core: `-no-color` flag properly disables color. [GH-250]
   * core: "~" is expanded in `-var-file` flags. [GH-273]
   * core: Errors with tfvars are shown in console. [GH-269]
+  * core: Interpolation function calls with more than two args parse. [GH-282]
   * providers/aws: Refreshing EIP from pre-0.2 state file won't error. [GH-258]
   * providers/aws: Creating EIP without an instance/network won't fail.
   * providers/aws: Refreshing EIP manually deleted works.

config/expr.y

@@ -62,9 +62,9 @@ args:
 	{
 		$$ = nil
 	}
-|	expr COMMA expr
+|	args COMMA expr
 	{
-		$$ = append($$, $1, $3)
+		$$ = append($1, $3)
 	}
 |	expr
 	{

config/expr_parse_test.go

@@ -88,6 +88,19 @@ func TestExprParse(t *testing.T) {
 			},
 			false,
 		},
+
+		{
+			`concat("foo","-","0.0/16")`,
+			&FunctionInterpolation{
+				Func: nil, // Funcs["lookup"]
+				Args: []Interpolation{
+					&LiteralInterpolation{Literal: "foo"},
+					&LiteralInterpolation{Literal: "-"},
+					&LiteralInterpolation{Literal: "0.0/16"},
+				},
+			},
+			false,
+		},
 	}
 
 	for i, tc := range cases {