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