From 830f4f0e48618baae1989425c6ec7b286a7410ed Mon Sep 17 00:00:00 2001
From: Roman Bataev <roman@bataev.me>
Date: Thu, 24 May 2018 22:30:57 -0700
Subject: [PATCH] Allow ClojureScript interop symbols

---
 core/parse.go                        | 6 ++++++
 tests/linter/cljs-interop/input.cljs | 4 ++++
 tests/linter/cljs-interop/output.txt | 1 +
 3 files changed, 11 insertions(+)
 create mode 100644 tests/linter/cljs-interop/input.cljs
 create mode 100644 tests/linter/cljs-interop/output.txt

diff --git a/core/parse.go b/core/parse.go
index 47c65decf..5d3b81d65 100644
--- a/core/parse.go
+++ b/core/parse.go
@@ -1514,6 +1514,7 @@ func parseSymbol(obj Object, ctx *ParseContext) Expr {
 			panic(&ParseError{obj: obj, msg: "Unable to resolve symbol: " + sym.ToString(false)})
 		}
 		if DIALECT == CLJS && sym.ns == nil {
+			// Check if this is a "callable namespace"
 			ns := ctx.GlobalEnv.FindNamespace(sym)
 			if ns == nil {
 				ns = ctx.GlobalEnv.CurrentNamespace().aliases[sym.name]
@@ -1522,6 +1523,11 @@ func parseSymbol(obj Object, ctx *ParseContext) Expr {
 				ns.isUsed = true
 				return NewSurrogateExpr(obj)
 			}
+			// See if this is a JS interop (i.e. Math.PI)
+			parts := strings.Split(sym.Name(), ".")
+			if len(parts) > 1 {
+				return parseSymbol(DeriveReadObject(obj, MakeSymbol(parts[0])), ctx)
+			}
 		}
 		symNs := ctx.GlobalEnv.NamespaceFor(ctx.GlobalEnv.CurrentNamespace(), sym)
 		if symNs == nil || symNs == ctx.GlobalEnv.CurrentNamespace() {
diff --git a/tests/linter/cljs-interop/input.cljs b/tests/linter/cljs-interop/input.cljs
new file mode 100644
index 000000000..dfa3624dd
--- /dev/null
+++ b/tests/linter/cljs-interop/input.cljs
@@ -0,0 +1,4 @@
+js/Math.PI
+(def m js/Math)
+m.PI
+g.PI
diff --git a/tests/linter/cljs-interop/output.txt b/tests/linter/cljs-interop/output.txt
new file mode 100644
index 000000000..7463af43c
--- /dev/null
+++ b/tests/linter/cljs-interop/output.txt
@@ -0,0 +1 @@
+tests/linter/cljs-interop/input.cljs:4:1: Parse error: Unable to resolve symbol: g