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if exists("b:current_syntax")
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finish
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endif
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let b:current_syntax = "uiua"
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syn iskeyword a-z
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syn keyword uiuaIdentifier e os family arch ExeExt DllExt sep
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syn match uiuaIdentifier '[a-zA-Z]\+'
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" {{{ functions and modifiers
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" constants
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syn keyword uiuaNoadic eta pi tau inf[inity] rand[om] tag now
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syn match uiuaNoadic '[ηπ∞τ⚂]'
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" monadic and dyadic pervasive functions
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syn keyword uiuaPervasive not sig[n] abs[olute] sqr[t] sin[e] flo[or] cei[ling] rou[nd] add subtract multiply divide mod[ulus] pow[er] log[arithm] min[imum] max[imum] ata[ngent]
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syn match uiuaPervasive '[¬±`¯⌵√○⌊⌈⁅]\|!=\|<=\|>=\|[=≠<≤>≥+\-×*÷%◿ⁿₙ↧↥∠]'
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" monadic array functions
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syn keyword uiuaMonadic len[gth] sha[pe] rang[e] fir[st] rev[erse] des[hape] bit[s] tra[nspose] ris[e] fal[e] whe[re] cla[ssify] ded[uplicate] box unb[ox] bre[ak] rec[ur] wait call parse gen type sig
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syn match uiuaMonadic '[⧻△⇡⊢⇌♭⋯⍉⍏⍖⊚⊛⊝□⊔!⎋↬]'
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" dyadic array functions
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syn keyword uiuaDyadic joi[n] cou[ple] mat[ch] pic[k] sel[ect] resh[ape] tak[e] dro[p] rot[ate] win[dows] kee[p] fin[d] mem[ber] ind[exof] ass[ert] deal
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syn match uiuaDyadic '[⊂⊟≅⊡⊏↯↙↘↻◫▽⌕∊⊗⍤]'
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" monadic modifiers
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syn keyword uiuaMonadicMod di[p] ga[p] eac[h] row[s] dis[tribute] tab[le] cro[ss] rep[eat] reduce fol[d] scan gro[up] par[tition] inv[ert] bot[h] spawn
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syn match uiuaMonadicMod '[⊙⋅∵≡∺⊞⊠⍥/∧⊕⊜\\⍘∩]'
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" dyadic and triadic modifiers
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syn keyword uiuaOtherMod lev[el] und[er] fil[l] bind bra[cket] for[k] try if
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syn match uiuaOtherMod /[⍚⍜⬚'⊓⊃⍣?]/
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" }}}
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" {{{ system functions
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" defined in inverse order so precedence for e.g.
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" &i and &ime, &s and &sc, etc. is correct
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" modules
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syn keyword uiuaModuleSF use
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syn match uiuaModuleSF '&i'
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syn match uiuaDyadicSF '\v\&(rs|rb|ru|w|fwa|ime|ae|tcpsrt|tcpswt|httpsw)'
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syn match uiuaMonadicSF '\v\&(sl|s|pf|p|var|runi|runc|cd|cl|fo|fc|fe|fld|fif|fras|frab|fwa|imd|ims|gife|ad|ap|ast|tcpl|tcpa|tcpc|tcpsnb|tcpaddr)'
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syn match uiuaNoadicSF '\v\&(sc|ts|args|asr)'
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" }}}
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" {{{ literals
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" numeric literal
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syn match uiuaNum '[¯`]\?\d\+\(\.\d\+\)\?\(e[¯`]\?\d\+\)\?'
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" escape sequence and format placeholder
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syn match uiuaEsc contained /\\[\\'"_0nrt]/
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syn match uiuaFmt contained '_'
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" character literal
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syn match uiuaChar '@.' contains=uiuaEsc
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" string literal (plain, format, and multiline)
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syn region uiuaStr start='"' end='"' skip='\\"' contains=uiuaEsc
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syn region uiuaStr start='\$"' end='"' skip='\\"' contains=uiuaEsc,uiuaFmt
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syn region uiuaStr start='\$ ' end='$' contains=uiuaEsc,uiuaFmt
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" }}}
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" {{{ misc
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" function signatures
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syn match uiuaSignature '|\d\+\(\.\d\+\)\?'
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" scopes, <- assignments, and stranded arrays
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syn match uiuaFaded '^---$\|[←_]'
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" debug functions
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syn keyword uiuaDebug dump
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syn match uiuaDebug '[~]'
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" comments
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syn match uiuaComment '#.*$'
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" }}}
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" {{{ highlight groups
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hi def link uiuaNoadic Keyword
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hi def link uiuaNoadicSF Keyword
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hi def link uiuaPervasive Operator
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hi def link uiuaMonadic Function
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hi def link uiuaMonadicSF Function
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hi def link uiuaDyadic Identifier
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hi def link uiuaDyadicSF Identifier
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hi def link uiuaMonadicMod Type
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hi def link uiuaOtherMod Number
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hi def link uiuaModuleSF Keyword
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hi def link uiuaNum Number
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hi def link uiuaEsc SpecialChar
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hi def link uiuaChar String
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hi def link uiuaFmt Operator
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hi def link uiuaStr String
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hi def link uiuaSignature Type
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hi def link uiuaDebug Operator
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hi def link uiuaFaded Comment
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hi def link uiuaComment Comment
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" }}}
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