115 lines
3.9 KiB
Go
115 lines
3.9 KiB
Go
// Copyright (c) 2024 Celestino Amoroso (celestino.amoroso@gmail.com).
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// All rights reserved.
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// Symbol.go
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package expr
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type Symbol int16
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const (
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SymUnknown Symbol = iota - 1 // -1: Unknown symbol
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SymNone // 0: Null value for variable of type symbol
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SymError // 1: Error reading from stream
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SymEos // 2: End of stream
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SymMinus // 3: '-'
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SymMinusEqual // 4: '-='
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SymDoubleMinus // 5: '--'
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SymPlus // 6: '+'
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SymPlusEqual // 7: '+='
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SymDoublePlus // 8: '++'
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SymStar // 9: '*'
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SymDoubleStar // 10: '**'
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SymSlash // 11: '/'
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SymBackSlash // 12: '\'
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SymVertBar // 13: '|'
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SymDoubleVertBar // 14: '||'
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SymComma // 15: ','
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SymColon // 16: ':'
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SymSemiColon // 17: ';'
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SymDot // 18: '.'
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SymDotSlash // 19: './'
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SymQuote // 20: '\''
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SymDoubleQuote // 21: '"'
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SymBackTick // 22: '`'
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SymExclamation // 23: '!'
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SymQuestion // 24: '?'
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SymAmpersand // 25: '&&'
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SymDoubleAmpersand // 26: '&&'
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SymPercent // 27: '%'
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SymAt // 28: '@'
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SymUndescore // 29: '_'
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SymEqual // 30: '='
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SymDoubleEqual // 31: '=='
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SymLess // 32: '<'
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SymLessOrEqual // 33: '<='
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SymGreater // 34: '>'
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SymGreaterOrEqual // 35: '>='
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SymLessGreater // 36: '<>'
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SymNotEqual // 37: '!='
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SymDollar // 38: '$'
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SymHash // 39: '#'
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SymOpenRound // 40: '('
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SymClosedRound // 41: ')'
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SymOpenSquare // 42: '['
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SymClosedSquare // 43: ']'
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SymOpenBrace // 44: '{'
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SymClosedBrace // 45: '}'
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SymTilde // 46: '~'
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SymDoubleQuestion // 47: '??'
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SymQuestionEqual // 48: '?='
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SymDoubleAt // 49: '@@'
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SymDoubleColon // 50: '::'
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SymInsert // 51: '>>'
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SymAppend // 52: '<<'
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SymCaret // 53: '^'
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SymDollarRound // 54: '$('
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SymOpenClosedRound // 55: '()'
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SymChangeSign
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SymUnchangeSign
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SymIdentifier
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SymBool
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SymInteger
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SymFloat
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SymString
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SymIterator
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SymOr
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SymAnd
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SymNot
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SymComment
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SymFuncCall
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SymFuncDef
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SymList
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SymDict
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SymExpression
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SymSelector // <selector> ::= <expr> "?" <selector-case> {":" <selector-case>} ["::" <default-selector-case>]
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SymSelectorCase // <selector-case> ::= [<list>] "{" <multi-expr> "}"
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// SymOpenComment // 0: '/*'
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// SymClosedComment // 0: '*/'
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// SymOneLineComment // 0: '//'
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keywordBase
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)
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const (
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SymKwAnd = keywordBase + iota
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SymKwNot
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SymKwOr
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SymKwBut
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SymKwFunc
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SymKwBuiltin
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SymKwNil
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)
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var keywords map[string]Symbol
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func init() {
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//keywords = make(map[string]Symbol)
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keywords = map[string]Symbol{
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"AND": SymKwAnd,
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"BUILTIN": SymKwBuiltin,
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"BUT": SymKwBut,
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"FUNC": SymKwFunc,
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"NOT": SymKwNot,
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"OR": SymKwOr,
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"NIL": SymKwNil,
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}
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}
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