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-rw-r--r--new-luxc/source/luxc/parser.lux93
1 files changed, 60 insertions, 33 deletions
diff --git a/new-luxc/source/luxc/parser.lux b/new-luxc/source/luxc/parser.lux
index 10f406bc7..1114ba76c 100644
--- a/new-luxc/source/luxc/parser.lux
+++ b/new-luxc/source/luxc/parser.lux
@@ -11,12 +11,6 @@
(coll [list "L/" Functor<List> Fold<List>]
["V" vector]))))
-(def: default-cursor
- Cursor
- {#;module ""
- #;line +0
- #;column +0})
-
(def: (space^ where)
(-> Cursor (Lexer [Text Cursor]))
(do Monad<Lexer>
@@ -128,7 +122,7 @@
(l;fail error)
(#;Right value)
- (wrap [[default-cursor (<tag> value)]
+ (wrap [[where (<tag> value)]
(|> where
(update@ #;column (n.+ (text;size chunk))))]))))]
@@ -160,7 +154,7 @@
(do Monad<Lexer>
[[chunk value] (l;enclosed ["#\"" "\""]
raw-char^)]
- (wrap [[default-cursor (#;CharS value)]
+ (wrap [[where (#;CharS value)]
(|> where
(update@ #;column (function [column]
($_ n.+
@@ -172,24 +166,57 @@
(-> Cursor (Lexer [AST Cursor]))
(do Monad<Lexer>
[_ (l;text "\"")
- [columns-read text-read] (loop [columns-read +1
- text-read ""]
- ($_ l;either
- (do @
- [normal (l;many' (l;none-of "\\\"\n"))]
- (recur (n.+ columns-read (text;size normal))
- (format text-read normal)))
- (do @
- [_ (l;text "\"")]
- (wrap [(n.inc columns-read)
- text-read]))
- (do @
- [[chunk char] escaped-char^]
- (wrap [(n.+ columns-read (text;size chunk))
- (format text-read (char;as-text char))]))))]
- (wrap [[default-cursor (#;TextS text-read)]
- (|> where
- (update@ #;column (n.+ columns-read)))])))
+ #let [offset-column (n.inc (get@ #;column where))]
+ [text-read where'] (: (Lexer [Text Cursor])
+ (loop [text-read ""
+ where (|> where
+ (update@ #;column n.inc))
+ next-line-start? false]
+ (let [next-line (do @
+ [_ (l;text "\n")]
+ (recur text-read
+ (|> where
+ (update@ #;line n.inc)
+ (set@ #;column +0))
+ true))]
+ (if next-line-start?
+ (l;either next-line
+ (do @
+ [offset (l;many' (l;char #" "))
+ #let [offset-size (text;size offset)]]
+ (if (n.>= offset-column offset-size)
+ (recur (|> offset
+ (text;split offset-column)
+ (default (undefined))
+ product;right
+ (format text-read))
+ (|> where
+ (update@ #;column (n.+ offset-size)))
+ false)
+ (l;fail (format "Each line of a multi-line text must have an appropriate offset!\n"
+ "Expected: " (%i (nat-to-int offset-column)) "\n"
+ " Actual: " (%i (nat-to-int offset-size)) "\n")))))
+ ($_ l;either
+ (do @
+ [normal (l;many' (l;none-of "\\\"\n"))]
+ (recur (format text-read normal)
+ (|> where
+ (update@ #;column (n.+ (text;size normal))))
+ false))
+ (do @
+ [[chunk char] escaped-char^]
+ (recur (format text-read (char;as-text char))
+ (|> where
+ (update@ #;column (n.+ (text;size chunk))))
+ false))
+ next-line
+ (do @
+ [_ (l;text "\"")]
+ (wrap [text-read
+ (|> where
+ (update@ #;column n.inc))])))))))]
+ (wrap [[where (#;TextS text-read)]
+ where'])))
(do-template [<name> <tag> <open> <close>]
[(def: (<name> where ast^)
@@ -212,7 +239,7 @@
(wrap [(V;to-list elems)
(|> where'
(update@ #;column n.inc))]))))]
- (wrap [[default-cursor (<tag> elems)]
+ (wrap [[where (<tag> elems)]
where'])))]
[form^ #;FormS "(" ")"]
@@ -240,7 +267,7 @@
(wrap [(V;to-list elems)
(|> where'
(update@ #;column n.inc))]))))]
- (wrap [[default-cursor (#;RecordS elems)]
+ (wrap [[where (#;RecordS elems)]
where'])))
(def: ident-part^
@@ -281,17 +308,17 @@
(wrap [["" first-part]
(text;size first-part)])))))
-(do-template [<name> <tag> <lexer>]
+(do-template [<name> <tag> <lexer> <extra>]
[(def: (<name> where)
(-> Cursor (Lexer [AST Cursor]))
(do Monad<Lexer>
[[value length] <lexer>]
- (wrap [[default-cursor (<tag> value)]
+ (wrap [[where (<tag> value)]
(|> where
- (update@ #;column (n.+ length)))])))]
+ (update@ #;column (function [column] ($_ n.+ column <extra> length))))])))]
- [symbol^ #;SymbolS ident^]
- [tag^ #;TagS (l;after (l;char #"#") ident^)]
+ [symbol^ #;SymbolS ident^ +0]
+ [tag^ #;TagS (l;after (l;char #"#") ident^) +1]
)
(def: #export (ast^ where)