1 files changed, 0 insertions, 45 deletions
diff --git a/compiler/syntax_error.go b/compiler/syntax_error.go
deleted file mode 100644
index 3925259..0000000
--- a/compiler/syntax_error.go
+++ /dev/null
@@ -1,45 +0,0 @@
-package compiler
-
-import "fmt"
-
-type SyntaxError struct {
-	Message string
-}
-
-func newSyntaxError(msg string) *SyntaxError {
-	return &SyntaxError{
-		Message: msg,
-	}
-}
-
-func (e *SyntaxError) Error() string {
-	return fmt.Sprintf("syntax error: %s", e.Message)
-}
-
-var (
-	// lexical errors
-	synErrIncompletedEscSeq     = newSyntaxError("incompleted escape sequence; unexpected EOF following \\")
-	synErrInvalidEscSeq         = newSyntaxError("invalid escape sequence")
-	synErrInvalidCodePoint      = newSyntaxError("code points must consist of just 4 or 6 hex digits")
-	synErrCharPropInvalidSymbol = newSyntaxError("invalid character property symbol")
-	SynErrFragmentInvalidSymbol = newSyntaxError("invalid fragment symbol")
-
-	// syntax errors
-	synErrUnexpectedToken        = newSyntaxError("unexpected token")
-	synErrNullPattern            = newSyntaxError("a pattern must be a non-empty byte sequence")
-	synErrAltLackOfOperand       = newSyntaxError("an alternation expression must have operands")
-	synErrRepNoTarget            = newSyntaxError("a repeat expression must have an operand")
-	synErrGroupNoElem            = newSyntaxError("a grouping expression must include at least one character")
-	synErrGroupUnclosed          = newSyntaxError("unclosed grouping expression")
-	synErrGroupNoInitiator       = newSyntaxError(") needs preceding (")
-	synErrGroupInvalidForm       = newSyntaxError("invalid grouping expression")
-	synErrBExpNoElem             = newSyntaxError("a bracket expression must include at least one character")
-	synErrBExpUnclosed           = newSyntaxError("unclosed bracket expression")
-	synErrBExpInvalidForm        = newSyntaxError("invalid bracket expression")
-	synErrRangeInvalidOrder      = newSyntaxError("a range expression with invalid order")
-	synErrCPExpInvalidForm       = newSyntaxError("invalid code point expression")
-	synErrCPExpOutOfRange        = newSyntaxError("a code point must be between U+0000 to U+10FFFF")
-	synErrCharPropExpInvalidForm = newSyntaxError("invalid character property expression")
-	synErrCharPropUnsupported    = newSyntaxError("unsupported character property")
-	synErrFragmentExpInvalidForm = newSyntaxError("invalid fragment expression")
-)