" Vim syntax file
" Language: WebAssembly
" Maintainer: rhysd
" Last Change: Jul 29, 2018
" For bugs, patches and license go to https://github.com/rhysd/vim-wasm
if exists("b:current_syntax")
finish
endif
let s:cpo_save = &cpo
set cpo&vim
syn cluster wastCluster contains=wastModule,wastInstWithType,wastInstGeneral,wastParamInst,wastControlInst,wastString,wastNamedVar,wastUnnamedVar,wastFloat,wastNumber,wastComment,wastList,wastType
" Instructions
" https://webassembly.github.io/spec/core/text/instructions.html
" Note: memarg (align=,offset=) can be added to memory instructions
syn match wastInstWithType "\%((\s*\)\@<=\<\%(i32\|i64\|f32\|f64\|memory\)\.[[:alnum:]_]\+\%(/\%(i32\|i64\|f32\|f64\)\)\=\>\%(\s\+\%(align\|offset\)=\)\=" contained display
syn match wastInstGeneral "\%((\s*\)\@<=\<[[:alnum:]_]\+\>" contained display
" https://webassembly.github.io/spec/core/text/instructions.html#control-instructions
syn match wastControlInst "\%((\s*\)\@<=\<\%(block\|end\|loop\|if\|else\|unreachable\|nop\|br\|br_if\|br_table\|return\|call\|call_indirect\)\>" contained display
" https://webassembly.github.io/spec/core/text/instructions.html#parametric-instructions
syn match wastParamInst "\%((\s*\)\@<=\<\%(drop\|select\)\>" contained display
" Identifiers
" https://webassembly.github.io/spec/core/text/values.html#text-id
syn match wastNamedVar "$\+[[:alnum:]!#$%&'∗./:=>@\\^_`~+-]*" contained display
syn match wastUnnamedVar "$\+\d\+[[:alnum:]!#$%&'∗./:=>@\\^_`~+-]\@!" contained display
" String literals
" https://webassembly.github.io/spec/core/text/values.html#strings
syn region wastString start=+"+ skip=+\\\\\|\\"+ end=+"+ contained contains=wastStringSpecial
syn match wastStringSpecial "\\\x\x\|\\[tnr'\\\"]\|\\u\x\+" contained containedin=wastString
" Float literals
" https://webassembly.github.io/spec/core/text/values.html#floating-point
syn match wastFloat "\<-\=\d\%(_\=\d\)*\%(\.\d\%(_\=\d\)*\)\=\%([eE][-+]\=\d\%(_\=\d\)*\)\=" display contained
syn match wastFloat "\<-\=0x\x\%(_\=\d\)*\%(\.\x\%(_\=\x\)*\)\=\%([pP][-+]\=\d\%(_\=\d\)*\)\=" display contained
syn keyword wastFloat inf nan contained
" Integer literals
" https://webassembly.github.io/spec/core/text/values.html#integers
syn match wastNumber "\<-\=\d\%(_\=\d\)*\>" display contained
syn match wastNumber "\<-\=0x\x\%(_\=\x\)*\>" display contained
" Comments
" https://webassembly.github.io/spec/core/text/lexical.html#comments
syn region wastComment start=";;" end="$" display
syn region wastComment start="(;;\@!" end=";)"
syn region wastList matchgroup=wastListDelimiter start="(;\@!" matchgroup=wastListDelimiter end=";\@