Consolidated repetition ops (instead of '+', '*', '?', etc. now it's all

number based: '1+', '0+', '0-1') and reverted to UPTO_AND behavior
instead of UPTO

1 files changed, 66 insertions, 0 deletions

diff --git a/grammars/bpeg.bpeg b/grammars/bpeg.bpeg
new file mode 100644
index 0000000..dd3a3b4
--- /dev/null
+++ b/grammars/bpeg.bpeg
@@ -0,0 +1,66 @@
+# This is a file defining the BPEG grammar using BPEG syntax
+
+Grammar = __ 0+Def%(__`;__) 0-1(`;__);
+Def = @[name]Ref __ `= __ @[definition]extended-pat;
+
+# This is used for command line arguments:
+String-pattern = 0+(`\ pat 0-1`; / .);
+
+pat = suffixed-pat / simple-pat;
+simple-pat = Empty / Upto-and / Dot / String / Char-range / Char / Escape-range / Escape / No
+    / Nodent / Repeat / After / Before / Capture / Replace / Ref / parens;
+suffixed-pat = Eq-pat;
+
+Eq-pat = @[first]simple-pat "==" @[second]pat;
+
+Empty = `/ >(__ (`)/`}));
+Dot = `. !`.;
+String = (
+        `" @[s]0+(Escape / !`"$.) `"
+      / `' @[s]0+(Escape / !`'$.) `'
+    );
+Char-range = `` @[low]. `- @[high].;
+Char = `` @[s].;
+Escape-range = `\ @[low]escape-sequence `- @[high]escape-sequence;
+Escape = `\ @[s]escape-sequence;
+escape-sequence = (
+        1-3 `0-7
+      / `x 2 (`0-9/`a-f/`A-F)
+      /`a/`b/`e/`n/`r/`t/`v / . / \n
+    );
+No = `! _ @pat;
+Nodent = `|;
+Upto-and = 2-3`. 0-1(_@pat);
+Repeat = (
+        @[min]int _ `- _ @[max]int
+      / @[min]int _ `+   @[max](/)
+      / @[min]@[max]int
+    ) _ @[repeat-pat]pat 0-1( __ `% __ @[sep]pat);
+After = `< _ pat;
+Before = `> _ pat;
+Capture = `@ 0-1(_ `[ @[capture-name]Ref `]) _ @[capture]pat;
+Replace = `{ __ (
+      0-1(@[replace-pat]extended-pat __) "=>" 0-1(__ @[replacement]String)
+    ) __ `};
+Ref = @[name](
+        "^^" / "^" / "__" / "_" / "$$" / "$" /
+        (`a-z/`A-Z) 0+(`a-z/`A-Z/`0-9/`-));
+
+parens = `( __ extended-pat __ `);
+
+Chain = 2+@pat % (__);
+Otherwise = 2+@(Chain/pat) % (__`/__);
+extended-pat = Otherwise / Chain / pat;
+
+# Special-symbol rules:
+_  = 0+(`  / \t);
+__ = 0+(`  / \t / \r / \n / comment);
+$$ = !$.;
+$  = !.;
+^^ = !<$.;
+^  = !<.;
+
+hash-comment = `# .. $;
+
+# Note: comments are undefined by default in regular BPEG
+comment = hash-comment;