From bae9f6d2fd5eb5bc80929bd393932b23f14d7c93 Mon Sep 17 00:00:00 2001
From: Jake Champlin <jake.champlin.27@gmail.com>
Date: Tue, 6 Jun 2017 12:40:07 -0400
Subject: Initial transfer of provider code

---
 .../github.com/hashicorp/hil/check_identifier.go   | 88 ++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 vendor/github.com/hashicorp/hil/check_identifier.go

(limited to 'vendor/github.com/hashicorp/hil/check_identifier.go')

diff --git a/vendor/github.com/hashicorp/hil/check_identifier.go b/vendor/github.com/hashicorp/hil/check_identifier.go
new file mode 100644
index 0000000..474f505
--- /dev/null
+++ b/vendor/github.com/hashicorp/hil/check_identifier.go
@@ -0,0 +1,88 @@
+package hil
+
+import (
+	"fmt"
+	"sync"
+
+	"github.com/hashicorp/hil/ast"
+)
+
+// IdentifierCheck is a SemanticCheck that checks that all identifiers
+// resolve properly and that the right number of arguments are passed
+// to functions.
+type IdentifierCheck struct {
+	Scope ast.Scope
+
+	err  error
+	lock sync.Mutex
+}
+
+func (c *IdentifierCheck) Visit(root ast.Node) error {
+	c.lock.Lock()
+	defer c.lock.Unlock()
+	defer c.reset()
+	root.Accept(c.visit)
+	return c.err
+}
+
+func (c *IdentifierCheck) visit(raw ast.Node) ast.Node {
+	if c.err != nil {
+		return raw
+	}
+
+	switch n := raw.(type) {
+	case *ast.Call:
+		c.visitCall(n)
+	case *ast.VariableAccess:
+		c.visitVariableAccess(n)
+	case *ast.Output:
+		// Ignore
+	case *ast.LiteralNode:
+		// Ignore
+	default:
+		// Ignore
+	}
+
+	// We never do replacement with this visitor
+	return raw
+}
+
+func (c *IdentifierCheck) visitCall(n *ast.Call) {
+	// Look up the function in the map
+	function, ok := c.Scope.LookupFunc(n.Func)
+	if !ok {
+		c.createErr(n, fmt.Sprintf("unknown function called: %s", n.Func))
+		return
+	}
+
+	// Break up the args into what is variadic and what is required
+	args := n.Args
+	if function.Variadic && len(args) > len(function.ArgTypes) {
+		args = n.Args[:len(function.ArgTypes)]
+	}
+
+	// Verify the number of arguments
+	if len(args) != len(function.ArgTypes) {
+		c.createErr(n, fmt.Sprintf(
+			"%s: expected %d arguments, got %d",
+			n.Func, len(function.ArgTypes), len(n.Args)))
+		return
+	}
+}
+
+func (c *IdentifierCheck) visitVariableAccess(n *ast.VariableAccess) {
+	// Look up the variable in the map
+	if _, ok := c.Scope.LookupVar(n.Name); !ok {
+		c.createErr(n, fmt.Sprintf(
+			"unknown variable accessed: %s", n.Name))
+		return
+	}
+}
+
+func (c *IdentifierCheck) createErr(n ast.Node, str string) {
+	c.err = fmt.Errorf("%s: %s", n.Pos(), str)
+}
+
+func (c *IdentifierCheck) reset() {
+	c.err = nil
+}
-- 
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