| // Copyright 2014 The Bazel Authors. All rights reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| package net.starlark.java.syntax; |
| |
| import java.math.BigInteger; |
| |
| /** Syntax node for an int literal. */ |
| public final class IntLiteral extends Expression { |
| private final String raw; |
| private final int tokenOffset; |
| private final Number value; // = Integer | Long | BigInteger |
| |
| IntLiteral(FileLocations locs, String raw, int tokenOffset, Number value) { |
| super(locs, Kind.INT_LITERAL); |
| this.raw = raw; |
| this.tokenOffset = tokenOffset; |
| this.value = value; |
| } |
| |
| /** |
| * Returns the value denoted by this literal as an Integer, Long, or BigInteger, using the |
| * narrowest type capable of exactly representing the value. |
| */ |
| public Number getValue() { |
| return value; |
| } |
| |
| /** Returns the raw source text of the literal. */ |
| public String getRaw() { |
| return raw; |
| } |
| |
| @Override |
| public int getStartOffset() { |
| return tokenOffset; |
| } |
| |
| @Override |
| public int getEndOffset() { |
| return tokenOffset + raw.length(); |
| } |
| |
| @Override |
| public void accept(NodeVisitor visitor) { |
| visitor.visit(this); |
| } |
| |
| /** |
| * Returns the value denoted by a non-negative integer literal with an optional base prefix (but |
| * no +/- sign), using the narrowest type of Integer, Long, or BigInteger capable of exactly |
| * representing the value. |
| * |
| * @throws NumberFormatException if the string is not a valid literal. |
| */ |
| public static Number scan(String str) { |
| String orig = str; |
| int radix = 10; |
| if (str.length() > 1 && str.charAt(0) == '0') { |
| switch (str.charAt(1)) { |
| case 'x': |
| case 'X': |
| radix = 16; |
| str = str.substring(2); |
| break; |
| case 'o': |
| case 'O': |
| radix = 8; |
| str = str.substring(2); |
| break; |
| default: |
| throw new NumberFormatException( |
| "invalid octal literal: " + str + " (use '0o" + str.substring(1) + "')"); |
| } |
| } |
| |
| try { |
| long v = Long.parseLong(str, radix); |
| if (v == (int) v) { |
| return (int) v; |
| } |
| return v; |
| } catch (NumberFormatException unused) { |
| /* fall through */ |
| } |
| try { |
| return new BigInteger(str, radix); |
| } catch (NumberFormatException unused) { |
| throw new NumberFormatException("invalid base-" + radix + " integer literal: " + orig); |
| } |
| } |
| } |