Merge pull request #5 from ajnavarro/fix/small-fixes

Fix: small README fixes and throw an error if expression not supported.

2 files changed, 4 insertions, 1 deletions

diff --git a/parser/README.md b/parser/README.md
index 118d9aa..b233248 100644
--- a/parser/README.md
+++ b/parser/README.md
@@ -13,7 +13,7 @@ The input of parser is a list of tokens produced by the scanner.
 Multiple tokens are processed at once. The minimal set to get
 meaningful results (not an error or nil) is a complete statement.
 
-The output of parser is also a list of tokens, to be consummed by
+The output of parser is also a list of tokens, to be consumed by
 the compiler to produce bytecode. The output tokens set is identical
 to the bytecode instructions set except that:
 
diff --git a/parser/expr.go b/parser/expr.go
index 91c093f..e4cef1a 100644
--- a/parser/expr.go
+++ b/parser/expr.go
@@ -1,6 +1,7 @@
 package parser
 
 import (
+	"fmt"
 	"log"
 	"strconv"
 
@@ -86,6 +87,8 @@ func (p *Parser) ParseExpr(in Tokens) (out Tokens, err error) {
 			out = append(out, t)
 			vl++
 			ops = append(ops, scanner.Token{Str: "index", Id: lang.Index, Pos: t.Pos})
+		default:
+			return nil, fmt.Errorf("expression not supported yet: %q", t.Str)
 		}
 		if len(selectors) > 0 {
 			out = append(out, selectors...)