fix add def.peg, accidentally dropped in git commit 7e56c94

1 files changed, 56 insertions, 0 deletions

diff --git a/syntax/def.peg b/syntax/def.peg
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index 0000000..e40610f
--- /dev/null
+++ b/syntax/def.peg
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+# Subsets of Markdown syntax structure
+# expressed in parsing expression grammar (PEG) notation.
+#
+# Copyright 2025, Jonas Smedegaard <dr@jones.dk>
+# SPDX-License-Identifier: GPL-3+
+
+# Document
+Markdown       <- ('---' NEWLINE MetaBlock* '---' NEWLINE)? Block*
+
+# Block elements
+Block          <- Header
+                / List
+                / LinkDefinition
+                / Paragraph
+Header         <- '#'+ SPACE* !NEWLINE Words? SPACE* NEWLINE
+List           <- ([-*]+ / [[:digit:]]+ [).]) (_ (List / Words))? NEWLINE
+LinkDefinition <- LinkLabel ':' _? Uri (_ LinkTitle)? NEWLINE
+Paragraph      <- Words (HardBreak Words)* NEWLINE+
+
+# Inline elements
+Words          <- StyledWords
+                / LinkedWords
+                / AnnotatedWords
+                / PlainWords
+StyledWords    <- '**' Words '**'
+                / '*' Words '*'
+                / '_' Words '_'
+LinkedWords    <- '[' Words ']' '(' ((Uri _)? LinkTitle / Uri) ')'
+                / '[' Words ']' LinkLabel
+                / LinkLabel
+AnnotatedWords <- '[' Words ']' '{' ![{}] PlainWords '}'
+LinkLabel      <- '[' _? ![\[\]] PlainWords _? ']'
+LinkTitle      <- '"' _? !'"' _? PlainWords _? '"'
+                / "'" _? !"'" PlainWords _? "'"
+                / "(" _? ![()] PlainWords _? ")"
+PlainWords     <- PRINTABLES (_ PRINTABLES)*
+Uri            <- '<' ![<>] PRINTABLES? '>'
+                / ![<>] PRINTABLES
+HardBreak      <- SPACE SPACE+ NEWLINE
+_              <- SPACE+
+                / SPACE? NEWLINE SPACE? SPACE? SPACE?
+
+# Terminals
+PRINTABLES     <- [[:graph:]]+
+SPACE          <- ' '
+NEWLINE        <- '\r\n'
+                / '\n'
+                / '\r'
+
+# Semantic Markdown
+AnnotatedWordsX <- '[' Words ']'
+                   ('{' (SemWords / ![{}] PlainWords) '}')
+SemWords        <- SEMPREFIX '<' ![<>] PRINTABLES '>'
+                 / SEMPREFIX Curie
+Curie           <- NAME? ':' NAME?
+SEMPREFIX       <- [.#]