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62 lines
1.1 KiB
62 lines
1.1 KiB
package expr
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var op1ch = [...]bool {
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'+': true,
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'-': true,
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'*': true,
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'/': true,
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'%': true,
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'&': true,
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'|': true,
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'^': true,
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'~': true,
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'(': true,
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')': true,
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}
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var op2ch = [...]bool {
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'*': true,
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'<': true,
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'>': true,
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}
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func neg2(v *Expr, err error) (*Expr, error) {
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if err != nil {
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return nil, err
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} else {
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return v.Neg(), nil
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}
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}
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func not2(v *Expr, err error) (*Expr, error) {
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if err != nil {
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return nil, err
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} else {
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return v.Not(), nil
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}
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}
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func isop1ch(ch rune) bool {
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return ch >= 0 && int(ch) < len(op1ch) && op1ch[ch]
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}
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func isop2ch(ch rune) bool {
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return ch >= 0 && int(ch) < len(op2ch) && op2ch[ch]
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}
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func isdigit(ch rune) bool {
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return ch >= '0' && ch <= '9'
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}
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func isident(ch rune) bool {
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return isdigit(ch) || isident0(ch)
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}
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func isident0(ch rune) bool {
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return (ch == '_') || (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z')
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}
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func ishexdigit(ch rune) bool {
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return isdigit(ch) || (ch >= 'a' && ch <= 'f') || (ch >= 'A' && ch <= 'F')
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}
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