added line-break escaping

lib/err.c

@@ -161,6 +161,7 @@ static char* synerrstr[] =
 	"unbalanced key/value pair",
 	"unbalanced parenthesis/brace/bracket",
 	"unexpected semicolon",
+	"stray backslash",
 	"block expression expected",
 	"block expression disallowed",
 	"invalid lvalue"

lib/hcl-prv.h

@@ -635,6 +635,7 @@ struct hcl_flx_st_t
 enum hcl_flx_state_t
 {
 	HCL_FLX_START,
+	HCL_FLX_BACKSLASHED,
 	HCL_FLX_COMMENT,
 	HCL_FLX_DELIM_TOKEN,
 	HCL_FLX_HMARKED_TOKEN,  /* hash-marked token */

lib/hcl.h

@@ -165,6 +165,7 @@ enum hcl_synerrnum_t
 	HCL_SYNERR_UNBALKV,       /* unbalanced key/value pair */
 	HCL_SYNERR_UNBALPBB,      /* unbalanced parenthesis/brace/bracket */
 	HCL_SYNERR_SEMICOLON,     /* unexpected semicolon */
+	HCL_SYNERR_BACKSLASH,     /* stray backslash */
 	HCL_SYNERR_BLOCK,         /* block expression expected */
 	HCL_SYNERR_BLOCKBANNED,   /* block expression disallowed */
 	HCL_SYNERR_LVALUE         /* invalid lvalue */

lib/read.c

@@ -1833,6 +1833,14 @@ static int flx_start (hcl_t* hcl, hcl_ooci_t c)
 			FEED_WRAP_UP_WITH_CHARS (hcl, vocas[VOCA_EOF].str, vocas[VOCA_EOF].len, HCL_TOK_EOF);
 			goto consumed;
 
+		case '\\':
+			FEED_CONTINUE_WITH_CHAR (hcl, c, HCL_FLX_BACKSLASHED);
+			goto consumed;
+
+		case '\n': /* specify all linebreak chars */
+			FEED_WRAP_UP_WITH_CHAR (hcl, c, HCL_TOK_SEMICOLON);
+			goto consumed;
+
 		/* this part is never hit because the semicolon sign is part of delim_tok_tab{}
 		   TODO: remove this part once the language spec is finalized to not require this
 		case ';':
@@ -1880,6 +1888,18 @@ not_consumed:
 	return 0;
 }
 
+static int flx_backslashed (hcl_t* hcl, hcl_ooci_t c)
+{
+	if (is_linebreak(c))
+	{
+		FEED_CONTINUE (hcl, HCL_FLX_START);
+		return 1; /* consumed */
+	}
+
+	hcl_setsynerrbfmt (hcl, HCL_SYNERR_BACKSLASH, TOKEN_LOC(hcl), TOKEN_NAME(hcl), "stray backslash");
+	return -1;
+}
+
 static int flx_comment (hcl_t* hcl, hcl_ooci_t c)
 {
 	if (is_linebreak(c)) FEED_CONTINUE (hcl, HCL_FLX_START);
@@ -2574,6 +2594,7 @@ static int feed_char (hcl_t* hcl, hcl_ooci_t c)
 	switch (FLX_STATE(hcl))
 	{
 		case HCL_FLX_START:            return flx_start(hcl, c);
+		case HCL_FLX_BACKSLASHED:      return flx_backslashed(hcl, c);
 		case HCL_FLX_COMMENT:          return flx_comment(hcl, c);
 		case HCL_FLX_DELIM_TOKEN:      return flx_delim_token(hcl, c);
 		case HCL_FLX_HMARKED_TOKEN:    return flx_hmarked_token(hcl, c);