Add fine-grainded arrow ligation control (#2776)
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7 changed files with 262 additions and 127 deletions
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@ -1,72 +1,72 @@
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[simple.center-ops]
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samples = [":=", ":-", ":+", "<*", "<*>", "*>", "+:", "-:", "=:", "<***>", "<:", ":>", "*-", "-*", "*=", "=*", "*+", "+*"]
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desc = 'Vertically align some of the operators (like `*`) to the center position it is before or after a "center" operator (like `+`)'
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###################################################################################################
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# The following section defines the fine-grained ligation set for the ligature font.
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# The ligation builder code (font-otl/src/gsub-ligation.ptl) will be driven by these settings.
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[simple.center-op-trigger-plus-minus-l]
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samples = ["*+", "*-", ":+", ":-", ".+", ".-"]
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desc = 'Plus (`+`) and Minus (`-`) will trigger other operator characters at left to be centered'
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### Arrows
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[simple.center-op-trigger-plus-minus-r]
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samples = ["+*", "-*", "+:", "-:", "+.", "-."]
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desc = 'Plus (`+`) and Minus (`-`) will trigger other operator characters at right to be centered'
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[simple.arrow-l-hyphen]
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samples = ["<--", "<---", "<<-", "<-", "<-->", "<--->", "<---->", "<-<"]
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desc = 'Left-pointing arrows with hyphen-minus (`-`) being the rod'
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[simple.center-op-trigger-equal-l]
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samples = ["*=", ":=", ".="]
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desc = 'Equal (`=`) will trigger other operator characters at left to be centered'
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[simple.arrow-r-hyphen]
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samples = ["->", "->>", "-->", "--->", "<-->", "<--->", "<---->", ">->"]
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desc = 'Right-pointing arrows with hyphen-minus (`-`) being the rod'
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[simple.center-op-trigger-equal-r]
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samples = ["=*", "=:", "=."]
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desc = 'Equal (`=`) will trigger other operator characters at right to be centered'
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[simple.arrow-lr-hyphen]
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samples = ["<->"]
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desc = 'Dual-pointing arrows with hyphen-minus (`-`) being the rod'
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[simple.center-op-trigger-bar-l]
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samples = ["*|", ":|"]
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desc = 'Bars (`|`) will trigger other operator characters at left to be centered'
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[simple.counter-arrow-l-hyphen]
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samples = ["-<<", "-<", "-<-", "-<<", "-<", "-<-"]
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desc = 'Left-pointing counter-arrows with hyphen-minus (`-`) being the rod'
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[simple.center-op-trigger-bar-r]
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samples = ["|*", "|:"]
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desc = 'Bars (`|`) will trigger other operator characters at right to be centered'
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[simple.center-op-trigger-angle-inside]
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samples = ["<:", "<:>", ":>", "<*", "<*>", "*>", "<.", "<.>", ".>"]
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desc = 'Less (`<`) and Greater (`>`) will trigger other operator characters at inside to be centered'
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[simple.center-op-trigger-angle-outside]
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samples = [">*", "*<"]
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desc = 'Less (`<`) and Greater (`>`) will trigger other operator characters at outside to be centered'
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[simple.center-op-influence-dot]
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samples = ["<.", "<.>", ".>"]
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desc = 'Treat dot (`.`) as operator and perform chained centering'
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[simple.center-op-influence-colon]
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samples = ["<:", "<:>", ":>", ":=", "=:", ":-", "-:"]
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desc = 'Treat colon (`:`) as operator and perform chained centering'
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[simple.counter-arrow-r-hyphen]
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samples = ["->-", ">-", ">>-", "->-", ">-", ">>-"]
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desc = 'Right-pointing counter-arrows with hyphen-minus (`-`) being the rod'
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[simple.arrow-l-equal]
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samples = ["<==", "<===", "<<=", "<=", "<==>", "<===>", "<====>", "<=<"]
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desc = 'Left-pointing arrows with equal sign (`=`) being the rod'
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[simple.arrow-l]
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samples = ["<--", "<---", "<<-", "<-", "<-->", "<--->", "<---->", "<=", "<==", "<===", "<<=", "<==>", "<===>", "<====>", "<~~", "<~", "<=<", "<-<"]
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desc = 'Enable ligation set that forms left-pointing arrows'
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[simple.arrow-r-equal]
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samples = ["=>", "=>>", "==>", "===>", "<==>", "<===>", "<====>", ">=>"]
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desc = 'Right-pointing arrows with equal sign (`=`) being the rod'
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[simple.arrow-r]
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samples = ["->", "->>", "-->", "--->", "<-->", "<--->", "<---->", "=>", "=>>", "==>", "===>", "<==>", "<===>", "<====>", "~>", "~~>", "-------->", ">=>", ">->"]
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desc = 'Enable ligation set that forms right-pointing arrows'
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[simple.arrow-lr-equal]
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samples = ["<=>"]
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desc = 'Dual-pointing arrows with equal sign (`=`) being the rod'
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[simple.arrow-lr]
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samples = ["<->", "<=>", "<~>"]
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desc = 'Enable ligation set that forms dual-pointing arrows'
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[simple.counter-arrow-l-equal]
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samples = ["=<<", "=<", "=<=", "=<<", "=<", "=<="]
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desc = 'Left-pointing counter-arrows with equal sign (`=`) being the rod'
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[simple.counter-arrow-l]
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samples = ["-<<", "-<", "-<-", "=<<", "=<", "=<=", "<=<", "-<<", "-<", "-<-", "=<<", "=<", "=<="]
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desc = 'Enable ligation that produces left-pointing counter-arrows'
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[simple.counter-arrow-r-equal]
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samples = ["=>=", ">=", ">>=", "=>=", ">=", ">>="]
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desc = 'Right-pointing counter-arrows with equal sign (`=`) being the rod'
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[simple.counter-arrow-r]
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samples = ["->-", ">-", ">>-", "=>=", ">=>", "->-", ">-", ">>-", ">>=", "=>="]
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desc = 'Enable ligation that produces right-pointing counter-arrows'
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[simple.trig]
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samples = ["<|", "<|>", "|>"]
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desc = 'Enable ligation for `<|`, `|>` , `<||`, and other bar-and-angle-bracket symbols'
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[simple.arrow-l-wave]
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samples = ["<~~", "<~~~", "<<~", "<~", "<~~>", "<~~~>", "<~~~~>", "<~<"]
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desc = 'Left-pointing arrows with tilde (`~`) being the rod'
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[simple.arrow-r-wave]
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samples = ["~>", "~>>", "~~>", "~~~>", "<~~>", "<~~~>", "<~~~~>", ">~>"]
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desc = 'Right-pointing arrows with tilde (`~`) being the rod'
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[simple.arrow-lr-wave]
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samples = ["<~>"]
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desc = 'Dual-pointing arrows with tilde (`~`) being the rod'
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[simple.counter-arrow-l-wave]
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samples = ["~<<", "~<", "~<~", "~<<", "~<", "~<~"]
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desc = 'Left-pointing counter-arrows with tilde (`~`) being the rod'
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[simple.counter-arrow-r-wave]
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samples = ["~>~", ">~", ">>~", "~>~", ">~", ">>~"]
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desc = 'Right-pointing counter-arrows with tilde (`~`) being the rod'
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### Equality and Inequality
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[simple.eqeqeq]
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samples = ["==="]
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@ -142,6 +142,12 @@ desc = 'Enable special triple-line ligation for `=/=` as inequality'
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samples = ["/=", "=/="]
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desc = 'Enable ligation for `/=` and `=/=` as inequality'
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### Triangles and Diamonds
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[simple.trig]
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samples = ["<|", "<|>", "|>"]
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desc = 'Enable ligation for `<|`, `|>` , `<||`, and other bar-and-angle-bracket symbols'
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[simple.ltgt-ne]
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samples = ["<>"]
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sampleRank = 2
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@ -161,6 +167,8 @@ samples = ["</", "/>", "</>"]
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sampleRank = 2
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desc = 'Enable ligation for `</`, `/>` and `</>`'
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### Comment symbols
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[simple.brst]
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samples = ["(*", "*)", "(* comm *)"]
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desc = 'Center asterisk in `(*` and `*)`'
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@ -169,6 +177,8 @@ desc = 'Center asterisk in `(*` and `*)`'
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samples = ["/*", "*/", "/* comm */"]
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desc = 'Shift asterisk in `/*` and `*/`'
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### Distance arrangement
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[simple.kern-dotty]
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samples = ["::", ":::"]
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desc = 'Move connecting dotty punctuations closer, like for `::`, `:::` and `...`'
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@ -177,37 +187,54 @@ desc = 'Move connecting dotty punctuations closer, like for `::`, `:::` and `...
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samples = ["||", "|||"]
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desc = 'Move consecutive bars closer, like for `||`, `|||` and `//`'
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[simple.logic]
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samples = ["/\\", "\\/", "|-", "-|"]
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desc = 'Enable ligation for `/\` and `\/`'
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### Operator Centering
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[simple.llgg]
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samples = ["<<", ">>", "<<<", ">>>"]
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desc = 'Enable ligation for `<<`, `>>` and other angle-bracket chaining'
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[simple.center-ops]
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samples = [":=", ":-", ":+", "<*", "<*>", "*>", "+:", "-:", "=:", "<***>", "<:", ":>", "*-", "-*", "*=", "=*", "*+", "+*"]
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desc = 'Vertically align some of the operators (like `*`) to the center position it is before or after a "center" operator (like `+`)'
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[simple.llggeq]
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samples = ["<<=", ">>="]
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sampleRank = 2
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desc = 'Enable ligation for `<<=`, `>>=` as shift operator'
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[simple.center-op-trigger-plus-minus-l]
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samples = ["*+", "*-", ":+", ":-", ".+", ".-"]
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desc = 'Plus (`+`) and Minus (`-`) will trigger other operator characters at left to be centered'
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[simple.html-comment]
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samples = ["<!--", "<!---"]
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desc = 'Enable ligation for `<!--` and `<!---`'
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[simple.center-op-trigger-plus-minus-r]
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samples = ["+*", "-*", "+:", "-:", "+.", "-."]
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desc = 'Plus (`+`) and Minus (`-`) will trigger other operator characters at right to be centered'
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[simple.colon-greater-as-colon-arrow]
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samples = [":>"]
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sampleRank = 2
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desc = 'Transform `:>` into `:` and a narrow arrow'
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[simple.center-op-trigger-equal-l]
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samples = ["*=", ":=", ".="]
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desc = 'Equal (`=`) will trigger other operator characters at left to be centered'
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[simple.brace-bar]
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samples = ["{|", "|}"]
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desc = 'Enable ligation for `{|` and `|}`'
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[simple.center-op-trigger-equal-r]
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samples = ["=*", "=:", "=."]
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desc = 'Equal (`=`) will trigger other operator characters at right to be centered'
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[simple.brack-bar]
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samples = ["[|", "|]"]
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desc = 'Enable ligation for `[|` and `|]`'
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[simple.center-op-trigger-bar-l]
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samples = ["*|", ":|"]
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desc = 'Bars (`|`) will trigger other operator characters at left to be centered'
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[simple.center-op-trigger-bar-r]
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samples = ["|*", "|:"]
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desc = 'Bars (`|`) will trigger other operator characters at right to be centered'
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[simple.center-op-trigger-angle-inside]
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samples = ["<:", "<:>", ":>", "<*", "<*>", "*>", "<.", "<.>", ".>"]
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desc = 'Less (`<`) and Greater (`>`) will trigger other operator characters at inside to be centered'
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[simple.center-op-trigger-angle-outside]
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samples = [">*", "*<"]
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desc = 'Less (`<`) and Greater (`>`) will trigger other operator characters at outside to be centered'
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[simple.center-op-influence-dot]
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samples = ["<.", "<.>", ".>"]
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desc = 'Treat dot (`.`) as operator and perform chained centering'
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[simple.center-op-influence-colon]
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samples = ["<:", "<:>", ":>", ":=", "=:", ":-", "-:"]
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desc = 'Treat colon (`:`) as operator and perform chained centering'
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### Connection
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# Connection
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[simple.tilde-tilde]
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samples = ["~~"]
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implies = ["tilde-tilde-tilde"]
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@ -253,7 +280,42 @@ desc = 'Make 2 or more contiguous hash signs (number signs) (like `##`, `###` an
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samples = ["###", "####"]
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desc = 'Make 3 or more contiguous hash signs (number signs) (like `##` and `###`) connected'
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### Miscellaneous
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[simple.logic]
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samples = ["/\\", "\\/", "|-", "-|"]
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desc = 'Enable ligation for `/\` and `\/`'
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[simple.llgg]
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samples = ["<<", ">>", "<<<", ">>>"]
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desc = 'Enable ligation for `<<`, `>>` and other angle-bracket chaining'
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[simple.llggeq]
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samples = ["<<=", ">>="]
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sampleRank = 2
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desc = 'Enable ligation for `<<=`, `>>=` as shift operator'
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[simple.html-comment]
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samples = ["<!--", "<!---"]
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desc = 'Enable ligation for `<!--` and `<!---`'
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[simple.colon-greater-as-colon-arrow]
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samples = [":>"]
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sampleRank = 2
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desc = 'Transform `:>` into `:` and a narrow arrow'
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[simple.brace-bar]
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samples = ["{|", "|}"]
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desc = 'Enable ligation for `{|` and `|}`'
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[simple.brack-bar]
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samples = ["[|", "|]"]
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desc = 'Enable ligation for `[|` and `|]`'
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###################################################################################################
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# The following section defines composites of ligation sets.
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# The buildup property defines its formation, and we allow composites to be recursive.
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# When the tag property is not defined, the composite will be exposed in the final font file.
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# Non-tagged composites, used for inheritance
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[composite.--default-center-ops--]
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@ -316,6 +378,52 @@ buildup = [ 'plus-plus', 'minus-minus', 'underscore-underscore', 'hash-hash', 't
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[composite.--c-like-chaining--]
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buildup = [ 'plus-plus', 'minus-minus-minus', 'underscore-underscore', 'hash-hash-hash', 'tilde-tilde-tilde' ]
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[composite.arrow-l]
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showAsCherryPicking = true
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desc = "Left-pointing arrows"
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buildup = ['arrow-l-hyphen', 'arrow-l-equal', 'arrow-l-wave']
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[composite.arrow-r]
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showAsCherryPicking = true
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desc = "Right-pointing arrows"
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buildup = ['arrow-r-hyphen', 'arrow-r-equal', 'arrow-r-wave']
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[composite.arrow-lr]
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showAsCherryPicking = true
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desc = "Dual-pointing arrows"
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buildup = ['arrow-lr-hyphen', 'arrow-lr-equal', 'arrow-lr-wave']
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[composite.counter-arrow-l]
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showAsCherryPicking = true
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desc = "Left-pointing counter-arrows"
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buildup = ['counter-arrow-l-hyphen', 'counter-arrow-l-equal', 'counter-arrow-l-wave']
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[composite.counter-arrow-r]
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showAsCherryPicking = true
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desc = "Right-pointing counter-arrows"
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buildup = ['counter-arrow-r-hyphen', 'counter-arrow-r-equal', 'counter-arrow-r-wave']
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[composite.arrow-hyphen]
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showAsCherryPicking = true
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desc = "Arrows using hyphen-minus (`-`) as the rod"
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buildup = ['arrow-l-hyphen', 'arrow-r-hyphen', 'arrow-lr-hyphen']
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[composite.arrow-equal]
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showAsCherryPicking = true
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desc = "Arrows using equal sign (`=`) as the rod"
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buildup = ['arrow-l-equal', 'arrow-r-equal', 'arrow-lr-equal']
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[composite.arrow-wave]
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showAsCherryPicking = true
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desc = "Arrows using tilde (`~`) as the rod"
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buildup = ['arrow-l-wave', 'arrow-r-wave', 'arrow-lr-wave']
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[composite.counter-arrow-hyphen]
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showAsCherryPicking = true
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desc = "Counter-arrows using hyphen-minus (`-`) as the rod"
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buildup = ['counter-arrow-l-hyphen', 'counter-arrow-r-hyphen']
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[composite.counter-arrow-equal]
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showAsCherryPicking = true
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desc = "Counter-arrows using equal sign (`=`) as the rod"
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buildup = ['counter-arrow-l-equal', 'counter-arrow-r-equal']
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[composite.counter-arrow-wave]
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showAsCherryPicking = true
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desc = "Counter-arrows using tilde (`~`) as the rod"
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buildup = ['counter-arrow-l-wave', 'counter-arrow-r-wave']
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# This feature is on by default by many software
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[composite.default-calt]
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tag = 'calt'
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