runtime(sml): Update syntax, improve special constant matching
Commit:
https://github.com/vim/vim/commit/85fc83f8490b957e3dbb3b7f51fbd7264a7208b6
Author: Doug Kearns <[email protected]>
Date: Wed Dec 3 20:21:49 2025 +0000
runtime(sml): Update syntax, improve special constant matching
- Match \dE\d real literal form
- Match all string escape sequences
- Add related tests
closes: #18723
Signed-off-by: Doug Kearns <[email protected]>
Signed-off-by: Christian Brabandt <[email protected]>
diff --git a/runtime/syntax/sml.vim b/runtime/syntax/sml.vim
index 288b2f8c7..5d80ebe47 100644
--- a/runtime/syntax/sml.vim
+++ b/runtime/syntax/sml.vim
@@ -3,7 +3,8 @@
" Filenames: *.sml *.sig
" Maintainer: Markus Mottl <[email protected]>
" Previous Maintainer: Fabrizio Zeno Cornelli <[email protected]>
(invalid)
-" Last Change: 2025 Nov 07 - Update Number Regex
+" Last Change: 2025 Nov 11 - Improve special constant matching (Doug Kearns)
+" 2025 Nov 07 - Update Number Regex
" 2022 Apr 01
" 2015 Aug 31 - Fixed opening of modules (Ramana Kumar)
" 2006 Oct 23 - Fixed character highlighting bug (MM)
@@ -137,9 +138,25 @@ syn match smlConstructor "\u\(\w\|'\)*\>"
" Module prefix
syn match smlModPath "\u\(\w\|'\)*\."he=e-1
-syn match smlCharacter +#"\""\|#"."\|#"\\d\d\d"+
-syn match smlCharErr +#"\\d\d"\|#"\\d"+
-syn region smlString start=+"+ skip=+\\\|\"+ end=+"+ contains=@Spell
+" Strings and Characters
+syn match smlEscapeErr "\." contained
+syn match smlEscape "\[abtnvfr"\]" contained
+syn match smlEscapeErr "\^." contained
+syn match smlEscape "\^[@A-Z[\\]^_]" contained
+syn match smlEscapeErr "\\d\{1,2}" contained
+syn match smlEscape "\\d\{3}" contained
+syn match smlEscapeErr "\u\x\{0,3}" contained
+syn match smlEscape "\u\x\{4}" contained
+syn match smlEscape "\\_[[:space:]]\+\" contained
+syn cluster smlEscape contains=smlEscape,smlEscapeErr
+
+syn region smlString start=+"+ end=+"+ contains=@smlEscape,@Spell
+
+syn match smlCharacter +#"[^\"]"+
+syn match smlCharacter +#"\."+ contains=@smlEscape
+syn match smlCharacter +#"\^."+ contains=@smlEscape
+syn match smlCharacter +#"\\d\{3}"+ contains=@smlEscape
+syn match smlCharacter +#"\u\x\{4}"+ contains=@smlEscape
syn match smlFunDef "=>"
syn match smlRefAssign ":="
@@ -156,7 +173,8 @@ syn match smlNumber "\~\=\<\d\+\>"
syn match smlNumber "\~\=\<0x\x\+\>"
syn match smlWord "\<0w\d\+\>"
syn match smlWord "\<0wx\x\+\>"
-syn match smlReal "\~\=\<\d\+\.\d\+\%([eE]\~\=\d\+\)\=\>"
+syn match smlReal "\~\=\<\d\+\.\d\+\>"
+syn match smlReal "\~\=\<\d\+\%(\.\d\+\)\=[eE]\~\=\d\+\>"
" Synchronization
syn sync minlines=20
@@ -181,7 +199,7 @@ hi def link smlCommentErr Error
hi def link smlEndErr Error
hi def link smlThenErr Error
-hi def link smlCharErr Error
+hi def link smlEscapeErr Error
hi def link smlComment Comment
@@ -213,6 +231,7 @@ hi def link smlNumber Number
hi def link smlWord Number
hi def link smlReal Float
hi def link smlString String
+hi def link smlEscape Special
hi def link smlType Type
hi def link smlTodo Todo
hi def link smlEncl Keyword
diff --git a/runtime/syntax/testdir/dumps/sml_00.dump
b/runtime/syntax/testdir/dumps/sml_00.dump
new file mode 100644
index 000000000..0cd2ed21f
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/sml_00.dump
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diff --git a/runtime/syntax/testdir/dumps/sml_01.dump
b/runtime/syntax/testdir/dumps/sml_01.dump
new file mode 100644
index 000000000..ad993264a
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+++ b/runtime/syntax/testdir/dumps/sml_01.dump
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diff --git a/runtime/syntax/testdir/dumps/sml_02.dump
b/runtime/syntax/testdir/dumps/sml_02.dump
new file mode 100644
index 000000000..d0e873e17
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diff --git a/runtime/syntax/testdir/dumps/sml_03.dump
b/runtime/syntax/testdir/dumps/sml_03.dump
new file mode 100644
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+|v+0#af5f00255&|a|l| +0#0000000&|_+0#af5f00255&| +0#0000000&|=+0#af5f00255&|
+0#0000000&|"+0#e000002&|.@2|\+0#e000e06&|^|@|.+0#e000002&@2|\+0#e000e06&|^|A|.+0#e000002&@2|\+0#e000e06&|^|K|.+0#e000002&@2|\+0#e000e06&|^|Z|.+0#e000002&@2|\+0#e000e06&|^|[|.+0#e000002&@2|\+0#e000e06&|^|\|.+0#e000002&@2|\+0#e000e06&|^|]|.+0#e000002&@2|\+0#e000e06&|^@1|.+0#e000002&@2|\+0#e000e06&|^|_|.+0#e000002&@2|"|;+0#af5f00255&|
+0#0000000&@6
+|v+0#af5f00255&|a|l| +0#0000000&|_+0#af5f00255&| +0#0000000&|=+0#af5f00255&|
+0#0000000&|"+0#e000002&|\+0#e000e06&|0@2|.+0#e000002&@2|\+0#e000e06&|9@2|.+0#e000002&@2|\+0#e000e06&|u|0@3|.+0#e000002&@2|\+0#e000e06&|u|F@3|.+0#e000002&@2|"|;+0#af5f00255&|
+0#0000000&@31
+@57|5@1|,|1| @9|9|4|%|
diff --git a/runtime/syntax/testdir/dumps/sml_04.dump
b/runtime/syntax/testdir/dumps/sml_04.dump
new file mode 100644
index 000000000..53e86ef42
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/sml_04.dump
@@ -0,0 +1,20 @@
+|v+0#af5f00255#ffffff0|a|l| +0#0000000&|_+0#af5f00255&|
+0#0000000&|=+0#af5f00255&|
+0#0000000&|"+0#e000002&|\+0#e000e06&|0@2|.+0#e000002&@2|\+0#e000e06&|9@2|.+0#e000002&@2|\+0#e000e06&|u|0@3|.+0#e000002&@2|\+0#e000e06&|u|F@3|.+0#e000002&@2|"|;+0#af5f00255&|
+0#0000000&@31
+|v+0#af5f00255&|a|l| +0#0000000&|_+0#af5f00255&| +0#0000000&|=+0#af5f00255&|
+0#0000000&|"+0#e000002&|.@2|\+0#e000e06&| +0#0000000&@61
+| +0#e000e06&@11|\|.+0#e000002&@2|"|;+0#af5f00255&| +0#0000000&@56
+> @74
+|~+0#4040ff13&| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+| +0#0000000&@56|7|1|,|0|-|1| @7|B|o|t|
diff --git a/runtime/syntax/testdir/input/sml.sml
b/runtime/syntax/testdir/input/sml.sml
new file mode 100644
index 000000000..dab0b82b9
--- /dev/null
+++ b/runtime/syntax/testdir/input/sml.sml
@@ -0,0 +1,71 @@
+(* Integer constants *)
+
+val _ = 0;
+val _ = 42;
+val _ = 0x2A;
+val _ = ~42; (* single token *)
+val _ = ~0x2A; (* single token *)
+
+
+(* Word constants *)
+
+val _ = 0w0;
+val _ = 0w42;
+val _ = 0wx2A;
+val _ = ~0w42; (* nonfix ~ *)
+val _ = ~0wx2A; (* nonfix ~ *)
+
+
+(* Real constants *)
+
+val _ = 0.0;
+val _ = 42.42;
+val _ = 42E42;
+val _ = 42E~42;
+val _ = 42.42E42;
+val _ = 42.42E~42;
+val _ = ~42.42; (* single token *)
+val _ = ~42.42; (* single token *)
+val _ = ~42E42; (* single token *)
+val _ = ~42E~42; (* single token *)
+val _ = ~42.42E42; (* single token *)
+val _ = ~42.42E~42; (* single token *)
+
+
+(* Character constants *)
+
+val _ = #"a";
+val _ = #" ";
+val _ = #" ";
+val _ = #" ";
+val _ = #"
";
+val _ = #" ";
+val _ = #" ";
+val _ = #"
";
+val _ = #"\"";
+val _ = #"\";
+val _ = #"\^@";
+val _ = #"\^A";
+val _ = #"\^K";
+val _ = #"\^Z";
+val _ = #"\^[";
+val _ = #"\^\";
+val _ = #"\^]";
+val _ = #"\^^";
+val _ = #"\^_";
+val _ = #"
+val _ = #"\999";
+val _ = #"\u0000";
+val _ = #"\uFFFF";
+
+
+(* String constants *)
+
+val _ = "";
+val _ = "abc";
+val _ = "... ... ... ...
... ... ...
...\"...\...";
+val _ = "...\^@...\^A...\^K...\^Z...\^[...\^\...\^]...\^^...\^_...";
+val _ = "
+val _ = "...\
+ \...";
+
--
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