Lexer now accepts files with no blank line at the end

README.md

@@ -56,8 +56,7 @@ Using a C compiler will link the C standard library to your program, which may
 be useful for building normal user applications.
 
 ## Bugs
-There are a lot of them. But something to be wary of, especially on Windows:
-currently, the compiler only excepts files with a blank line at the end.
+This compiler has *many* bugs. If you come accross any please create an issue.
 
 ## Roadmap
 

lexer/lexer.go

@@ -89,7 +89,7 @@ func (this *fsplLexer) nextInternal () (token lexer.Token, err error) {
 	
 	token.Pos = this.pos()
 
-	if this.eof == true {
+	if this.eof {
 		token.Type = EOF
 		err = nil
 		return
@@ -105,6 +105,7 @@ func (this *fsplLexer) nextInternal () (token lexer.Token, err error) {
 		token.Type = Int
 		for isDigit(this.rune) {
 			appendRune()
+			if this.eof { err = nil; return }
 			if err != nil { return }
 		}
 		if this.rune == '.' {
@@ -131,6 +132,7 @@ func (this *fsplLexer) nextInternal () (token lexer.Token, err error) {
 		token.Type = Ident
 		for unicode.IsLetter(this.rune) || isDigit(this.rune) {
 			appendRune()
+			if this.eof { err = nil; return }
 			if err != nil { return }
 		}
 	// TypeIdent
@@ -138,6 +140,7 @@ func (this *fsplLexer) nextInternal () (token lexer.Token, err error) {
 		token.Type = TypeIdent
 		for unicode.IsLetter(this.rune) || isDigit(this.rune) {
 			appendRune()
+			if this.eof { err = nil; return }
 			if err != nil { return }
 		}
 	// Int, Float
@@ -157,10 +160,12 @@ func (this *fsplLexer) nextInternal () (token lexer.Token, err error) {
 				token.Value += string(result)
 			} else {
 				appendRune()
+				if this.eof { err = nil; return }
 				if err != nil { return }
 			}
 		}
 		err = this.nextRune()
+		if this.eof { err = nil; return }
 		if err != nil { return }
 	// Symbol, Int, Float
 	case this.rune == '-':
@@ -169,12 +174,15 @@ func (this *fsplLexer) nextInternal () (token lexer.Token, err error) {
 		if err != nil { return }
 		if isDigit(this.rune) {
 			doNumber()
+			if this.eof { err = nil; return }
 		} else if isSymbol(this.rune) {
 			doSymbol()
+			if this.eof { err = nil; return }
 		}
 	// Symbol
 	case isSymbol(this.rune):
 		doSymbol()
+		if this.eof { err = nil; return }
 	case this.rune == '(':
 		token.Type = LParen
 		appendRune()

lexer/lexer_test.go

@@ -97,3 +97,31 @@ tok(RParen, ")"),
 
 tok(EOF, ""),
 )}
+
+func TestLexerNoTrailingEOLInt (test *testing.T) {
+testString(test,
+`12345`,
+tok(Int, "12345"),
+tok(EOF, ""),
+)}
+
+func TestLexerNoTrailingEOLString (test *testing.T) {
+testString(test,
+`'12345'`,
+tok(String, "12345"),
+tok(EOF, ""),
+)}
+
+func TestLexerNoTrailingEOLIdent (test *testing.T) {
+testString(test,
+`hello`,
+tok(Ident, "hello"),
+tok(EOF, ""),
+)}
+
+func TestLexerNoTrailingEOLSymbol (test *testing.T) {
+testString(test,
+`@#$`,
+tok(Symbol, "@#$"),
+tok(EOF, ""),
+)}