Merge remote-tracking branch 'upstream/master'

1 files changed, 56 insertions, 0 deletions

diff --git a/jam-files/engine/scan.h b/jam-files/engine/scan.h
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+/*
+ * Copyright 1993, 1995 Christopher Seiwald.
+ *
+ * This file is part of Jam - see jam.c for Copyright information.
+ */
+
+/*
+ * scan.h - the jam yacc scanner
+ *
+ * External functions:
+ *
+ *  yyerror( char *s ) - print a parsing error message.
+ *  yyfparse( char *s ) - scan include file s.
+ *  yylex() - parse the next token, returning its type.
+ *  yymode() - adjust lexicon of scanner.
+ *  yyparse() - declaration for yacc parser.
+ *  yyanyerrors() - indicate if any parsing errors occured.
+ *
+ * The yymode() function is for the parser to adjust the lexicon of the scanner.
+ * Aside from normal keyword scanning, there is a mode to handle action strings
+ * (look only for the closing }) and a mode to ignore most keywords when looking
+ * for a punctuation keyword. This allows non-punctuation keywords to be used in
+ * lists without quoting.
+ */
+
+/*
+ * YYSTYPE - value of a lexical token
+ */
+
+#define YYSTYPE YYSYMBOL
+
+typedef struct _YYSTYPE
+{
+    int     type;
+    char  * string;
+    PARSE * parse;
+    LIST  * list;
+    int     number;
+    char  * file;
+    int     line;
+} YYSTYPE;
+
+extern YYSTYPE yylval;
+
+void yymode( int n );
+void yyerror( char * s );
+int yyanyerrors();
+void yyfparse( char * s );
+int yyline();
+int yylex();
+int yyparse();
+void yyinput_stream( char * * name, int * line );
+
+# define SCAN_NORMAL  0   /* normal parsing */
+# define SCAN_STRING  1   /* look only for matching } */
+# define SCAN_PUNCT   2   /* only punctuation keywords */