63 lines
1.6 KiB
Go
63 lines
1.6 KiB
Go
package zclsyntax
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type Operation rune
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const (
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OpNil Operation = 0 // Zero value of Operation. Not a valid Operation.
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OpLogicalOr Operation = '∨'
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OpLogicalAnd Operation = '∧'
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OpLogicalNot Operation = '!'
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OpEqual Operation = '='
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OpNotEqual Operation = '≠'
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OpGreaterThan Operation = '>'
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OpGreaterThanOrEqual Operation = '≥'
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OpLessThan Operation = '<'
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OpLessThanOrEqual Operation = '≤'
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OpAdd Operation = '+'
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OpSubtract Operation = '-'
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OpMultiply Operation = '*'
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OpDivide Operation = '/'
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OpModulo Operation = '%'
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OpNegate Operation = '∓'
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)
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var binaryOps []map[TokenType]Operation
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func init() {
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// This operation table maps from the operator's token type
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// to the AST operation type. All expressions produced from
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// binary operators are BinaryOp nodes.
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//
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// Binary operator groups are listed in order of precedence, with
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// the *lowest* precedence first. Operators within the same group
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// have left-to-right associativity.
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binaryOps = []map[TokenType]Operation{
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{
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TokenOr: OpLogicalOr,
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},
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{
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TokenAnd: OpLogicalAnd,
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},
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{
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TokenEqual: OpEqual,
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TokenNotEqual: OpNotEqual,
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},
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{
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TokenGreaterThan: OpGreaterThan,
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TokenGreaterThanEq: OpGreaterThanOrEqual,
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TokenLessThan: OpLessThan,
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TokenLessThanEq: OpLessThanOrEqual,
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},
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{
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TokenPlus: OpAdd,
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TokenMinus: OpSubtract,
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},
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{
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TokenStar: OpMultiply,
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TokenSlash: OpDivide,
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TokenPercent: OpModulo,
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},
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}
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}
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