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authorEduardo Julian2017-11-15 20:57:47 -0400
committerEduardo Julian2017-11-15 20:57:47 -0400
commitb5c854fb5ac1ead274f4ae0c657da66df957f14e (patch)
treeb89035466363121a58e37c62f340c75a8c7dbeb7 /new-luxc/source
parent094c0904470f85ff0d63c788e07ce1ecf355577e (diff)
- Moved "luxc/lang/syntax" to "lux/lang/syntax".
- Minor refactoring.
Diffstat (limited to 'new-luxc/source')
-rw-r--r--new-luxc/source/luxc/lang.lux2
-rw-r--r--new-luxc/source/luxc/lang/analysis/common.lux2
-rw-r--r--new-luxc/source/luxc/lang/analysis/function.lux2
-rw-r--r--new-luxc/source/luxc/lang/analysis/inference.lux2
-rw-r--r--new-luxc/source/luxc/lang/analysis/procedure/common.lux8
-rw-r--r--new-luxc/source/luxc/lang/analysis/procedure/host.jvm.lux14
-rw-r--r--new-luxc/source/luxc/lang/analysis/structure.lux28
-rw-r--r--new-luxc/source/luxc/lang/analysis/type.lux4
-rw-r--r--new-luxc/source/luxc/lang/eval.lux2
-rw-r--r--new-luxc/source/luxc/lang/syntax.lux623
-rw-r--r--new-luxc/source/luxc/lang/translation.lux12
11 files changed, 38 insertions, 661 deletions
diff --git a/new-luxc/source/luxc/lang.lux b/new-luxc/source/luxc/lang.lux
index 373c6b12b..844cc6755 100644
--- a/new-luxc/source/luxc/lang.lux
+++ b/new-luxc/source/luxc/lang.lux
@@ -40,7 +40,7 @@
(:: meta;Monad<Meta> (~' wrap) [])
(;;throw (~ exception) (~ message)))))))
-(def: #export (with-expected-type expected action)
+(def: #export (with-type expected action)
(All [a] (-> Type (Meta a) (Meta a)))
(function [compiler]
(case (action (set@ #;expected (#;Some expected) compiler))
diff --git a/new-luxc/source/luxc/lang/analysis/common.lux b/new-luxc/source/luxc/lang/analysis/common.lux
index 2f3e3a37d..95355d62f 100644
--- a/new-luxc/source/luxc/lang/analysis/common.lux
+++ b/new-luxc/source/luxc/lang/analysis/common.lux
@@ -14,7 +14,7 @@
(All [a] (-> (Meta a) (Meta [Type a])))
(do meta;Monad<Meta>
[[_ varT] (&;with-type-env tc;var)
- analysis (&;with-expected-type varT
+ analysis (&;with-type varT
action)
knownT (&;with-type-env (tc;clean varT))]
(wrap [knownT analysis])))
diff --git a/new-luxc/source/luxc/lang/analysis/function.lux b/new-luxc/source/luxc/lang/analysis/function.lux
index 5403026cb..611e5c8a4 100644
--- a/new-luxc/source/luxc/lang/analysis/function.lux
+++ b/new-luxc/source/luxc/lang/analysis/function.lux
@@ -77,7 +77,7 @@
## also to themselves, through a local variable.
(&scope;with-local [func-name expectedT])
(&scope;with-local [arg-name inputT])
- (&;with-expected-type outputT)
+ (&;with-type outputT)
(analyse body))
_
diff --git a/new-luxc/source/luxc/lang/analysis/inference.lux b/new-luxc/source/luxc/lang/analysis/inference.lux
index 080a6c620..cccaa774a 100644
--- a/new-luxc/source/luxc/lang/analysis/inference.lux
+++ b/new-luxc/source/luxc/lang/analysis/inference.lux
@@ -113,7 +113,7 @@
(function [_] (Cannot-Infer-Argument
(format "Inferred Type: " (%type inputT) "\n"
" Argument: " (%code argC))))
- (&;with-expected-type inputT
+ (&;with-type inputT
(analyse argC)))]
(wrap [outputT' (list& argA args'A)]))
diff --git a/new-luxc/source/luxc/lang/analysis/procedure/common.lux b/new-luxc/source/luxc/lang/analysis/procedure/common.lux
index be77e643c..a643cb76a 100644
--- a/new-luxc/source/luxc/lang/analysis/procedure/common.lux
+++ b/new-luxc/source/luxc/lang/analysis/procedure/common.lux
@@ -56,7 +56,7 @@
[_ (&;infer outputT)
argsA (monad;map @
(function [[argT argC]]
- (&;with-expected-type argT
+ (&;with-type argT
(analyse argC)))
(list;zip2 inputsT+ args))]
(wrap (la;procedure proc argsA)))
@@ -98,7 +98,7 @@
(do meta;Monad<Meta>
[[var-id varT] (&;with-type-env tc;var)
_ (&;infer (type (Either Text varT)))
- opA (&;with-expected-type (type (io;IO varT))
+ opA (&;with-type (type (io;IO varT))
(analyse opC))]
(wrap (la;procedure proc (list opA))))
@@ -148,7 +148,7 @@
(^ (list valueC))
(do meta;Monad<Meta>
[_ (&;infer (type Type))
- valueA (&;with-expected-type Type
+ valueA (&;with-type Type
(analyse valueC))]
(wrap valueA))
@@ -342,7 +342,7 @@
(do meta;Monad<Meta>
[[var-id varT] (&;with-type-env tc;var)
_ (&;infer (type (Atom varT)))
- initA (&;with-expected-type varT
+ initA (&;with-type varT
(analyse initC))]
(wrap (la;procedure proc (list initA))))
diff --git a/new-luxc/source/luxc/lang/analysis/procedure/host.jvm.lux b/new-luxc/source/luxc/lang/analysis/procedure/host.jvm.lux
index c6a456441..8f5382d2b 100644
--- a/new-luxc/source/luxc/lang/analysis/procedure/host.jvm.lux
+++ b/new-luxc/source/luxc/lang/analysis/procedure/host.jvm.lux
@@ -197,7 +197,7 @@
(do meta;Monad<Meta>
[_ (&;infer Nat)
[var-id varT] (&;with-type-env tc;var)
- arrayA (&;with-expected-type (type (Array varT))
+ arrayA (&;with-type (type (Array varT))
(analyse arrayC))]
(wrap (la;procedure proc (list arrayA))))
@@ -210,7 +210,7 @@
(case args
(^ (list lengthC))
(do meta;Monad<Meta>
- [lengthA (&;with-expected-type Nat
+ [lengthA (&;with-type Nat
(analyse lengthC))
expectedT meta;expected-type
[level elem-class] (: (Meta [Nat Text])
@@ -303,12 +303,12 @@
(do meta;Monad<Meta>
[[var-id varT] (&;with-type-env tc;var)
_ (&;infer varT)
- arrayA (&;with-expected-type (type (Array varT))
+ arrayA (&;with-type (type (Array varT))
(analyse arrayC))
?elemT (&;with-type-env
(tc;read var-id))
[elemT elem-class] (box-array-element-type (maybe;default varT ?elemT))
- idxA (&;with-expected-type Nat
+ idxA (&;with-type Nat
(analyse idxC))]
(wrap (la;procedure proc (list (code;text elem-class) idxA arrayA))))
@@ -323,14 +323,14 @@
(do meta;Monad<Meta>
[[var-id varT] (&;with-type-env tc;var)
_ (&;infer (type (Array varT)))
- arrayA (&;with-expected-type (type (Array varT))
+ arrayA (&;with-type (type (Array varT))
(analyse arrayC))
?elemT (&;with-type-env
(tc;read var-id))
[valueT elem-class] (box-array-element-type (maybe;default varT ?elemT))
- idxA (&;with-expected-type Nat
+ idxA (&;with-type Nat
(analyse idxC))
- valueA (&;with-expected-type valueT
+ valueA (&;with-type valueT
(analyse valueC))]
(wrap (la;procedure proc (list (code;text elem-class) idxA valueA arrayA))))
diff --git a/new-luxc/source/luxc/lang/analysis/structure.lux b/new-luxc/source/luxc/lang/analysis/structure.lux
index 3048d4a4e..76b5a3a42 100644
--- a/new-luxc/source/luxc/lang/analysis/structure.lux
+++ b/new-luxc/source/luxc/lang/analysis/structure.lux
@@ -45,7 +45,7 @@
(case (list;nth tag flat)
(#;Some variant-type)
(do @
- [valueA (&;with-expected-type variant-type
+ [valueA (&;with-type variant-type
(analyse valueC))
temp &scope;next-local]
(wrap (la;sum tag type-size temp valueA)))
@@ -54,7 +54,7 @@
(&common;variant-out-of-bounds-error expectedT type-size tag)))
(#;Named name unnamedT)
- (&;with-expected-type unnamedT
+ (&;with-type unnamedT
(analyse-sum analyse tag valueC))
(#;Var id)
@@ -63,7 +63,7 @@
(tc;read id))]
(case ?expectedT'
(#;Some expectedT')
- (&;with-expected-type expectedT'
+ (&;with-type expectedT'
(analyse-sum analyse tag valueC))
_
@@ -79,7 +79,7 @@
(<tag> _)
(do @
[[instance-id instanceT] (&;with-type-env <instancer>)]
- (&;with-expected-type (maybe;assume (type;apply (list instanceT) expectedT))
+ (&;with-type (maybe;assume (type;apply (list instanceT) expectedT))
(analyse-sum analyse tag valueC))))
([#;UnivQ tc;existential]
[#;ExQ tc;var])
@@ -91,7 +91,7 @@
[?funT' (&;with-type-env (tc;read funT-id))]
(case ?funT'
(#;Some funT')
- (&;with-expected-type (#;Apply inputT funT')
+ (&;with-type (#;Apply inputT funT')
(analyse-sum analyse tag valueC))
_
@@ -105,7 +105,7 @@
(&;throw Not-Quantified-Type (%type funT))
(#;Some outputT)
- (&;with-expected-type outputT
+ (&;with-type outputT
(analyse-sum analyse tag valueC))))
_
@@ -123,14 +123,14 @@
## If the tuple runs out, whatever expression is the last gets
## matched to the remaining type.
[tailT (#;Cons tailC #;Nil)]
- (&;with-expected-type tailT
+ (&;with-type tailT
(analyse tailC))
## If the type and the code are still ongoing, match each
## sub-expression to its corresponding type.
[(#;Product leftT rightT) (#;Cons leftC rightC)]
(do @
- [leftA (&;with-expected-type leftT
+ [leftA (&;with-type leftT
(analyse leftC))
rightA (recur rightT rightC)]
(wrap (` [(~ leftA) (~ rightA)])))
@@ -155,7 +155,7 @@
[tailT tailC]
(do @
[g!tail (meta;gensym "tail")]
- (&;with-expected-type tailT
+ (&;with-type tailT
(analyse (` ("lux case" [(~@ tailC)]
(~ g!tail)
(~ g!tail))))))
@@ -173,7 +173,7 @@
(analyse-typed-product analyse membersC)
(#;Named name unnamedT)
- (&;with-expected-type unnamedT
+ (&;with-type unnamedT
(analyse-product analyse membersC))
(#;Var id)
@@ -182,7 +182,7 @@
(tc;read id))]
(case ?expectedT'
(#;Some expectedT')
- (&;with-expected-type expectedT'
+ (&;with-type expectedT'
(analyse-product analyse membersC))
_
@@ -199,7 +199,7 @@
(<tag> _)
(do @
[[instance-id instanceT] (&;with-type-env <instancer>)]
- (&;with-expected-type (maybe;assume (type;apply (list instanceT) expectedT))
+ (&;with-type (maybe;assume (type;apply (list instanceT) expectedT))
(analyse-product analyse membersC))))
([#;UnivQ tc;existential]
[#;ExQ tc;var])
@@ -211,7 +211,7 @@
[?funT' (&;with-type-env (tc;read funT-id))]
(case ?funT'
(#;Some funT')
- (&;with-expected-type (#;Apply inputT funT')
+ (&;with-type (#;Apply inputT funT')
(analyse-product analyse membersC))
_
@@ -224,7 +224,7 @@
(&;throw Not-Quantified-Type (%type funT))
(#;Some outputT)
- (&;with-expected-type outputT
+ (&;with-type outputT
(analyse-product analyse membersC))))
_
diff --git a/new-luxc/source/luxc/lang/analysis/type.lux b/new-luxc/source/luxc/lang/analysis/type.lux
index 4184dd0c0..eb3de08de 100644
--- a/new-luxc/source/luxc/lang/analysis/type.lux
+++ b/new-luxc/source/luxc/lang/analysis/type.lux
@@ -15,7 +15,7 @@
[actualT (eval Type type)
#let [actualT (:! Type actualT)]
_ (&;infer actualT)]
- (&;with-expected-type actualT
+ (&;with-type actualT
(analyse value))))
(def: #export (analyse-coerce analyse eval type value)
@@ -23,5 +23,5 @@
(do meta;Monad<Meta>
[actualT (eval Type type)
_ (&;infer (:! Type actualT))]
- (&;with-expected-type Top
+ (&;with-type Top
(analyse value))))
diff --git a/new-luxc/source/luxc/lang/eval.lux b/new-luxc/source/luxc/lang/eval.lux
index 20c3acaeb..265320dbe 100644
--- a/new-luxc/source/luxc/lang/eval.lux
+++ b/new-luxc/source/luxc/lang/eval.lux
@@ -11,7 +11,7 @@
(def: #export (eval type exprC)
&;Eval
(do meta;Monad<Meta>
- [exprA (&;with-expected-type type
+ [exprA (&;with-type type
(expressionA;analyser eval exprC))
#let [exprS (expressionS;synthesize exprA)]
exprI (expressionT;translate exprS)]
diff --git a/new-luxc/source/luxc/lang/syntax.lux b/new-luxc/source/luxc/lang/syntax.lux
deleted file mode 100644
index 9fe4939a2..000000000
--- a/new-luxc/source/luxc/lang/syntax.lux
+++ /dev/null
@@ -1,623 +0,0 @@
-## This is the LuxC's parser.
-## It takes the source code of a Lux file in raw text form and
-## extracts the syntactic structure of the code from it.
-## It only produces Lux Code nodes, and thus removes any white-space
-## and comments while processing its inputs.
-
-## Another important aspect of the parser is that it keeps track of
-## its position within the input data.
-## That is, the parser takes into account the line and column
-## information in the input text (it doesn't really touch the
-## file-name aspect of the cursor, leaving it intact in whatever
-## base-line cursor it is given).
-
-## This particular piece of functionality is not located in one
-## function, but it is instead scattered throughout several parsers,
-## since the logic for how to update the cursor varies, depending on
-## what is being parsed, and the rules involved.
-
-## You will notice that several parsers have a "where" parameter, that
-## tells them the cursor position prior to the parser being run.
-## They are supposed to produce some parsed output, alongside an
-## updated cursor pointing to the end position, after the parser was run.
-
-## Lux Code nodes/tokens are annotated with cursor meta-data
-## (file-name, line, column) to keep track of their provenance and
-## location, which is helpful for documentation and debugging.
-(;module:
- lux
- (lux (control monad
- ["p" parser "p/" Monad<Parser>]
- ["ex" exception #+ exception:])
- (data [bool]
- [text]
- ["e" error]
- [number]
- [product]
- [maybe]
- (text ["l" lexer]
- format)
- (coll [sequence #+ Sequence]))))
-
-(def: white-space Text "\t\v \r\f")
-(def: new-line Text "\n")
-
-## This is the parser for white-space.
-## Whenever a new-line is encountered, the column gets reset to 0, and
-## the line gets incremented.
-## It operates recursively in order to produce the longest continuous
-## chunk of white-space.
-(def: (space^ where)
- (-> Cursor (l;Lexer [Cursor Text]))
- (p;either (do p;Monad<Parser>
- [content (l;many (l;one-of white-space))]
- (wrap [(update@ #;column (n.+ (text;size content)) where)
- content]))
- ## New-lines must be handled as a separate case to ensure line
- ## information is handled properly.
- (do p;Monad<Parser>
- [content (l;many (l;one-of new-line))]
- (wrap [(|> where
- (update@ #;line (n.+ (text;size content)))
- (set@ #;column +0))
- content]))
- ))
-
-## Single-line comments can start anywhere, but only go up to the
-## next new-line.
-(def: (single-line-comment^ where)
- (-> Cursor (l;Lexer [Cursor Text]))
- (do p;Monad<Parser>
- [_ (l;this "##")
- comment (l;some (l;none-of new-line))
- _ (l;this new-line)]
- (wrap [(|> where
- (update@ #;line n.inc)
- (set@ #;column +0))
- comment])))
-
-## This is just a helper parser to find text which doesn't run into
-## any special character sequences for multi-line comments.
-(def: comment-bound^
- (l;Lexer Unit)
- ($_ p;either
- (l;this new-line)
- (l;this ")#")
- (l;this "#(")))
-
-## Multi-line comments are bounded by #( these delimiters, #(and, they may
-## also be nested)# )#.
-## Multi-line comment syntax must be balanced.
-## That is, any nested comment must have matched delimiters.
-## Unbalanced comments ought to be rejected as invalid code.
-(def: (multi-line-comment^ where)
- (-> Cursor (l;Lexer [Cursor Text]))
- (do p;Monad<Parser>
- [_ (l;this "#(")]
- (loop [comment ""
- where (update@ #;column (n.+ +2) where)]
- ($_ p;either
- ## These are normal chunks of commented text.
- (do @
- [chunk (l;many (l;not comment-bound^))]
- (recur (format comment chunk)
- (|> where
- (update@ #;column (n.+ (text;size chunk))))))
- ## This is a special rule to handle new-lines within
- ## comments properly.
- (do @
- [_ (l;this new-line)]
- (recur (format comment new-line)
- (|> where
- (update@ #;line n.inc)
- (set@ #;column +0))))
- ## This is the rule for handling nested sub-comments.
- ## Ultimately, the whole comment is just treated as text
- ## (the comment must respect the syntax structure, but the
- ## output produced is just a block of text).
- ## That is why the sub-comment is covered in delimiters
- ## and then appended to the rest of the comment text.
- (do @
- [[sub-where sub-comment] (multi-line-comment^ where)]
- (recur (format comment "#(" sub-comment ")#")
- sub-where))
- ## Finally, this is the rule for closing the comment.
- (do @
- [_ (l;this ")#")]
- (wrap [(update@ #;column (n.+ +2) where)
- comment]))
- ))))
-
-## This is the only parser that should be used directly by other
-## parsers, since all comments must be treated as either being
-## single-line or multi-line.
-## That is, there is no syntactic rule prohibiting one type of comment
-## from being used in any situation (alternatively, forcing one type
-## of comment to be the only usable one).
-(def: (comment^ where)
- (-> Cursor (l;Lexer [Cursor Text]))
- (p;either (single-line-comment^ where)
- (multi-line-comment^ where)))
-
-## To simplify parsing, I remove any left-padding that an Code token
-## may have prior to parsing the token itself.
-## Left-padding is assumed to be either white-space or a comment.
-## The cursor gets updated, but the padding gets ignored.
-(def: (left-padding^ where)
- (-> Cursor (l;Lexer Cursor))
- ($_ p;either
- (do p;Monad<Parser>
- [[where comment] (comment^ where)]
- (left-padding^ where))
- (do p;Monad<Parser>
- [[where white-space] (space^ where)]
- (left-padding^ where))
- (:: p;Monad<Parser> wrap where)))
-
-## Escaped character sequences follow the usual syntax of
-## back-slash followed by a letter (e.g. \n).
-## Unicode escapes are possible, with hexadecimal sequences between 1
-## and 4 characters long (e.g. \u12aB).
-## Escaped characters may show up in Char and Text literals.
-(def: escaped-char^
- (l;Lexer [Nat Text])
- (p;after (l;this "\\")
- (do p;Monad<Parser>
- [code l;any]
- (case code
- ## Handle special cases.
- "t" (wrap [+2 "\t"])
- "v" (wrap [+2 "\v"])
- "b" (wrap [+2 "\b"])
- "n" (wrap [+2 "\n"])
- "r" (wrap [+2 "\r"])
- "f" (wrap [+2 "\f"])
- "\"" (wrap [+2 "\""])
- "\\" (wrap [+2 "\\"])
-
- ## Handle unicode escapes.
- "u"
- (do p;Monad<Parser>
- [code (l;between +1 +4 l;hexadecimal)]
- (wrap (case (|> code (format "+") (:: number;Hex@Codec<Text,Nat> decode))
- (#;Right value)
- [(n.+ +2 (text;size code)) (text;from-code value)]
-
- _
- (undefined))))
-
- _
- (p;fail (format "Invalid escaping syntax: " (%t code)))))))
-
-## These are very simple parsers that just cut chunks of text in
-## specific shapes and then use decoders already present in the
-## standard library to actually produce the values from the literals.
-(def: rich-digit
- (l;Lexer Text)
- (p;either l;decimal
- (p;after (l;this "_") (p/wrap ""))))
-
-(def: rich-digits^
- (l;Lexer Text)
- (l;seq l;decimal
- (l;some rich-digit)))
-
-(def: (marker^ token)
- (-> Text (l;Lexer Text))
- (p;after (l;this token) (p/wrap token)))
-
-(do-template [<name> <tag> <lexer> <codec>]
- [(def: #export (<name> where)
- (-> Cursor (l;Lexer [Cursor Code]))
- (do p;Monad<Parser>
- [chunk <lexer>]
- (case (:: <codec> decode chunk)
- (#;Left error)
- (p;fail error)
-
- (#;Right value)
- (wrap [(update@ #;column (n.+ (text;size chunk)) where)
- [where (<tag> value)]]))))]
-
- [bool #;Bool
- (p;either (marker^ "true") (marker^ "false"))
- bool;Codec<Text,Bool>]
-
- [int #;Int
- (l;seq (p;default "" (l;one-of "-"))
- rich-digits^)
- number;Codec<Text,Int>]
-
- [deg #;Deg
- (l;seq (l;one-of ".")
- rich-digits^)
- number;Codec<Text,Deg>]
- )
-
-(def: (nat-char where)
- (-> Cursor (l;Lexer [Cursor Code]))
- (do p;Monad<Parser>
- [_ (l;this "#\"")
- [where' char] (: (l;Lexer [Cursor Text])
- ($_ p;either
- ## Normal text characters.
- (do @
- [normal (l;none-of "\\\"\n")]
- (wrap [(|> where
- (update@ #;column n.inc))
- normal]))
- ## Must handle escaped
- ## chars separately.
- (do @
- [[chars-consumed char] escaped-char^]
- (wrap [(|> where
- (update@ #;column (n.+ chars-consumed)))
- char]))))
- _ (l;this "\"")
- #let [char (maybe;assume (text;nth +0 char))]]
- (wrap [(|> where'
- (update@ #;column n.inc))
- [where (#;Nat char)]])))
-
-(def: (normal-nat where)
- (-> Cursor (l;Lexer [Cursor Code]))
- (do p;Monad<Parser>
- [chunk (l;seq (l;one-of "+")
- rich-digits^)]
- (case (:: number;Codec<Text,Nat> decode chunk)
- (#;Left error)
- (p;fail error)
-
- (#;Right value)
- (wrap [(update@ #;column (n.+ (text;size chunk)) where)
- [where (#;Nat value)]]))))
-
-(def: #export (nat where)
- (-> Cursor (l;Lexer [Cursor Code]))
- (p;either (normal-nat where)
- (nat-char where)))
-
-(def: (normal-frac where)
- (-> Cursor (l;Lexer [Cursor Code]))
- (do p;Monad<Parser>
- [chunk ($_ l;seq
- (p;default "" (l;one-of "-"))
- rich-digits^
- (l;one-of ".")
- rich-digits^
- (p;default ""
- ($_ l;seq
- (l;one-of "eE")
- (p;default "" (l;one-of "+-"))
- rich-digits^)))]
- (case (:: number;Codec<Text,Frac> decode chunk)
- (#;Left error)
- (p;fail error)
-
- (#;Right value)
- (wrap [(update@ #;column (n.+ (text;size chunk)) where)
- [where (#;Frac value)]]))))
-
-(def: frac-ratio-fragment
- (l;Lexer Frac)
- (<| (p;codec number;Codec<Text,Frac>)
- (:: p;Monad<Parser> map (function [digits]
- (format digits ".0")))
- rich-digits^))
-
-(def: (ratio-frac where)
- (-> Cursor (l;Lexer [Cursor Code]))
- (do p;Monad<Parser>
- [chunk ($_ l;seq
- (p;default "" (l;one-of "-"))
- rich-digits^
- (l;one-of "/")
- rich-digits^)
- value (l;local chunk
- (do @
- [signed? (l;this? "-")
- numerator frac-ratio-fragment
- _ (l;this? "/")
- denominator frac-ratio-fragment
- _ (p;assert "Denominator cannot be 0."
- (not (f.= 0.0 denominator)))]
- (wrap (|> numerator
- (f.* (if signed? -1.0 1.0))
- (f./ denominator)))))]
- (wrap [(update@ #;column (n.+ (text;size chunk)) where)
- [where (#;Frac value)]])))
-
-(def: #export (frac where)
- (-> Cursor (l;Lexer [Cursor Code]))
- (p;either (normal-frac where)
- (ratio-frac where)))
-
-## This parser looks so complex because text in Lux can be multi-line
-## and there are rules regarding how this is handled.
-(def: #export (text where)
- (-> Cursor (l;Lexer [Cursor Code]))
- (do p;Monad<Parser>
- [## Lux text "is delimited by double-quotes", as usual in most
- ## programming languages.
- _ (l;this "\"")
- ## I must know what column the text body starts at (which is
- ## always 1 column after the left-delimiting quote).
- ## This is important because, when procesing subsequent lines,
- ## they must all start at the same column, being left-padded with
- ## as many spaces as necessary to be column-aligned.
- ## This helps ensure that the formatting on the text in the
- ## source-code matches the formatting of the Text value.
- #let [offset-column (n.inc (get@ #;column where))]
- [where' text-read] (: (l;Lexer [Cursor Text])
- ## I must keep track of how much of the
- ## text body has been read, how far the
- ## cursor has progressed, and whether I'm
- ## processing a subsequent line, or just
- ## processing normal text body.
- (loop [text-read ""
- where (|> where
- (update@ #;column n.inc))
- must-have-offset? false]
- (p;either (if must-have-offset?
- ## If I'm at the start of a
- ## new line, I must ensure the
- ## space-offset is at least
- ## as great as the column of
- ## the text's body's column,
- ## to ensure they are aligned.
- (do @
- [offset (l;many (l;one-of " "))
- #let [offset-size (text;size offset)]]
- (if (n.>= offset-column offset-size)
- ## Any extra offset
- ## becomes part of the
- ## text's body.
- (recur (|> offset
- (text;split offset-column)
- (maybe;default (undefined))
- product;right
- (format text-read))
- (|> where
- (update@ #;column (n.+ offset-size)))
- false)
- (p;fail (format "Each line of a multi-line text must have an appropriate offset!\n"
- "Expected: " (%i (nat-to-int offset-column)) " columns.\n"
- " Actual: " (%i (nat-to-int offset-size)) " columns.\n"))))
- ($_ p;either
- ## Normal text characters.
- (do @
- [normal (l;many (l;none-of "\\\"\n"))]
- (recur (format text-read normal)
- (|> where
- (update@ #;column (n.+ (text;size normal))))
- false))
- ## Must handle escaped
- ## chars separately.
- (do @
- [[chars-consumed char] escaped-char^]
- (recur (format text-read char)
- (|> where
- (update@ #;column (n.+ chars-consumed)))
- false))
- ## The text ends when it
- ## reaches the right-delimiter.
- (do @
- [_ (l;this "\"")]
- (wrap [(update@ #;column n.inc where)
- text-read]))))
- ## If a new-line is
- ## encountered, it gets
- ## appended to the value and
- ## the loop is alerted that the
- ## next line must have an offset.
- (do @
- [_ (l;this new-line)]
- (recur (format text-read new-line)
- (|> where
- (update@ #;line n.inc)
- (set@ #;column +0))
- true)))))]
- (wrap [where'
- [where (#;Text text-read)]])))
-
-## Form and tuple syntax is mostly the same, differing only in the
-## delimiters involved.
-## They may have an arbitrary number of arbitrary Code nodes as elements.
-(do-template [<name> <tag> <open> <close>]
- [(def: (<name> where ast)
- (-> Cursor
- (-> Cursor (l;Lexer [Cursor Code]))
- (l;Lexer [Cursor Code]))
- (do p;Monad<Parser>
- [_ (l;this <open>)
- [where' elems] (loop [elems (: (Sequence Code)
- sequence;empty)
- where where]
- (p;either (do @
- [## Must update the cursor as I
- ## go along, to keep things accurate.
- [where' elem] (ast where)]
- (recur (sequence;add elem elems)
- where'))
- (do @
- [## Must take into account any
- ## padding present before the
- ## end-delimiter.
- where' (left-padding^ where)
- _ (l;this <close>)]
- (wrap [(update@ #;column n.inc where')
- (sequence;to-list elems)]))))]
- (wrap [where'
- [where (<tag> elems)]])))]
-
- [form #;Form "(" ")"]
- [tuple #;Tuple "[" "]"]
- )
-
-## Records are almost (syntactically) the same as forms and tuples,
-## with the exception that their elements must come in pairs (as in
-## key-value pairs).
-## Semantically, though, records and tuples are just 2 different
-## representations for the same thing (a tuple).
-## In normal Lux syntax, the key position in the pair will be a tag
-## Code node, however, record Code nodes allow any Code node to occupy
-## this position, since it may be useful when processing Code syntax in
-## macros.
-(def: (record where ast)
- (-> Cursor
- (-> Cursor (l;Lexer [Cursor Code]))
- (l;Lexer [Cursor Code]))
- (do p;Monad<Parser>
- [_ (l;this "{")
- [where' elems] (loop [elems (: (Sequence [Code Code])
- sequence;empty)
- where where]
- (p;either (do @
- [[where' key] (ast where)
- [where' val] (ast where')]
- (recur (sequence;add [key val] elems)
- where'))
- (do @
- [where' (left-padding^ where)
- _ (l;this "}")]
- (wrap [(update@ #;column n.inc where')
- (sequence;to-list elems)]))))]
- (wrap [where'
- [where (#;Record elems)]])))
-
-## The parts of an identifier are separated by a single mark.
-## E.g. module;name.
-## Only one such mark may be used in an identifier, since there
-## can only be 2 parts to an identifier (the module [before the
-## mark], and the name [after the mark]).
-## There are also some extra rules regarding identifier syntax,
-## encoded on the parser.
-(def: identifier-separator Text ";")
-
-## A Lux identifier is a pair of chunks of text, where the first-part
-## refers to the module that gives context to the identifier, and the
-## second part corresponds to the name of the identifier itself.
-## The module part may be absent (by being the empty text ""), but the
-## name part must always be present.
-## The rules for which characters you may use are specified in terms
-## of which characters you must avoid (to keep things as open-ended as
-## possible).
-## In particular, no white-space can be used, and neither can other
-## characters which are already used by Lux as delimiters for other
-## Code nodes (thereby reducing ambiguity while parsing).
-## Additionally, the first character in an identifier's part cannot be
-## a digit, to avoid confusion with regards to numbers.
-(def: ident-part^
- (l;Lexer Text)
- (do p;Monad<Parser>
- [#let [digits "0123456789"
- delimiters (format "()[]{}#\"" identifier-separator)
- space (format white-space new-line)
- head-lexer (l;none-of (format digits delimiters space))
- tail-lexer (l;some (l;none-of (format delimiters space)))]
- head head-lexer
- tail tail-lexer]
- (wrap (format head tail))))
-
-(def: current-module-mark Text (format identifier-separator identifier-separator))
-
-(def: (ident^ current-module)
- (-> Text (l;Lexer [Ident Nat]))
- ($_ p;either
- ## When an identifier starts with 2 marks, its module is
- ## taken to be the current-module being compiled at the moment.
- ## This can be useful when mentioning identifiers and tags
- ## inside quoted/templated code in macros.
- (do p;Monad<Parser>
- [_ (l;this current-module-mark)
- def-name ident-part^]
- (wrap [[current-module def-name]
- (n.+ +2 (text;size def-name))]))
- ## If the identifier is prefixed by the mark, but no module
- ## part, the module is assumed to be "lux" (otherwise known as
- ## the 'prelude').
- ## This makes it easy to refer to definitions in that module,
- ## since it is the most fundamental module in the entire
- ## standard library.
- (do p;Monad<Parser>
- [_ (l;this identifier-separator)
- def-name ident-part^]
- (wrap [["lux" def-name]
- (n.inc (text;size def-name))]))
- ## Not all identifiers must be specified with a module part.
- ## If that part is not provided, the identifier will be created
- ## with the empty "" text as the module.
- ## During program analysis, such identifiers tend to be treated
- ## as if their context is the current-module, but this only
- ## applies to identifiers for tags and module definitions.
- ## Function arguments and local-variables may not be referred-to
- ## using identifiers with module parts, so being able to specify
- ## identifiers with empty modules helps with those use-cases.
- (do p;Monad<Parser>
- [first-part ident-part^]
- (p;either (do @
- [_ (l;this identifier-separator)
- second-part ident-part^]
- (wrap [[first-part second-part]
- ($_ n.+
- (text;size first-part)
- +1
- (text;size second-part))]))
- (wrap [["" first-part]
- (text;size first-part)])))))
-
-## The only (syntactic) difference between a symbol and a tag (both
-## being identifiers), is that tags must be prefixed with a hash-sign
-## (i.e. #).
-## Semantically, though, they are very different, with symbols being
-## used to refer to module definitions and local variables, while tags
-## provide the compiler with information related to data-structure
-## construction and de-structuring (during pattern-matching).
-(do-template [<name> <tag> <lexer> <extra>]
- [(def: #export (<name> current-module where)
- (-> Text Cursor (l;Lexer [Cursor Code]))
- (do p;Monad<Parser>
- [[value length] <lexer>]
- (wrap [(update@ #;column (|>. ($_ n.+ <extra> length)) where)
- [where (<tag> value)]])))]
-
- [symbol #;Symbol (ident^ current-module) +0]
- [tag #;Tag (p;after (l;this "#") (ident^ current-module)) +1]
- )
-
-(exception: #export End-Of-File)
-(exception: #export Unrecognized-Input)
-
-(def: (ast current-module)
- (-> Text Cursor (l;Lexer [Cursor Code]))
- (: (-> Cursor (l;Lexer [Cursor Code]))
- (function ast' [where]
- (do p;Monad<Parser>
- [where (left-padding^ where)]
- ($_ p;either
- (form where ast')
- (tuple where ast')
- (record where ast')
- (bool where)
- (nat where)
- (frac where)
- (int where)
- (deg where)
- (symbol current-module where)
- (tag current-module where)
- (text where)
- (do @
- [end? l;end?]
- (if end?
- (p;fail (End-Of-File current-module))
- (p;fail (Unrecognized-Input current-module))))
- )))))
-
-(def: #export (parse current-module [where offset source])
- (-> Text Source (e;Error [Source Code]))
- (case (p;run [offset source] (ast current-module where))
- (#e;Error error)
- (#e;Error error)
-
- (#e;Success [[offset' remaining] [where' output]])
- (#e;Success [[where' offset' remaining] output])))
diff --git a/new-luxc/source/luxc/lang/translation.lux b/new-luxc/source/luxc/lang/translation.lux
index e573aa3ae..88fc25d3a 100644
--- a/new-luxc/source/luxc/lang/translation.lux
+++ b/new-luxc/source/luxc/lang/translation.lux
@@ -9,6 +9,7 @@
(coll [dict]))
[meta]
(meta (type ["tc" check]))
+ (lang [syntax])
[host]
[io]
(world [file #+ File]))
@@ -18,7 +19,6 @@
[";L" host]
(host [";H" macro]
["$" jvm])
- ["&;" syntax]
(analysis [";A" expression]
[";A" common])
(synthesis [";S" expression])
@@ -41,7 +41,7 @@
(-> Code (Meta [$;Inst Code]))
(do meta;Monad<Meta>
[[_ annsA] (&;with-scope
- (&;with-expected-type Code
+ (&;with-type Code
(analyse annsC)))
annsI (expressionT;translate (expressionS;synthesize annsA))
annsV (evalT;eval annsI)]
@@ -58,7 +58,7 @@
[_ valueT valueA] (&;with-scope
(if (meta;type? (:! Code annsV))
(do @
- [valueA (&;with-expected-type Type
+ [valueA (&;with-type Type
(analyse valueC))]
(wrap [Type valueA]))
(commonA;with-unknown-type
@@ -73,7 +73,7 @@
(^code ("lux program" (~ [_ (#;Symbol ["" program-args])]) (~ programC)))
(do meta;Monad<Meta>
[[_ programA] (&;with-scope
- (&;with-expected-type (type (io;IO Unit))
+ (&;with-type (type (io;IO Unit))
(analyse programC)))
programI (expressionT;translate (expressionS;synthesize programA))]
(statementT;translate-program program-args programI))
@@ -111,7 +111,7 @@
((exhaust action) compiler')
(#e;Error error)
- (if (ex;match? &syntax;End-Of-File error)
+ (if (ex;match? syntax;End-Of-File error)
(#e;Success [compiler []])
(#e;Error error)))))
@@ -129,7 +129,7 @@
(def: (parse current-module)
(-> Text (Meta Code))
(function [compiler]
- (case (&syntax;parse current-module (get@ #;source compiler))
+ (case (syntax;parse current-module (get@ #;source compiler))
(#e;Error error)
(#e;Error error)