mirror of
https://github.com/google/go-jsonnet.git
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112 lines
2.8 KiB
Go
112 lines
2.8 KiB
Go
/*
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Copyright 2016 Google Inc. All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package jsonnet
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import (
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"fmt"
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)
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//////////////////////////////////////////////////////////////////////////////
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// Location
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// Location represents a single location in an (unspecified) file.
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type Location struct {
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Line int
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Column int
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}
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// IsSet returns if this Location has been set.
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func (l *Location) IsSet() bool {
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return l.Line != 0
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}
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func (l *Location) String() string {
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return fmt.Sprintf("%v:%v", l.Line, l.Column)
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}
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//////////////////////////////////////////////////////////////////////////////
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// LocationRange
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// LocationRange represents a range of a source file.
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type LocationRange struct {
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FileName string
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Begin Location
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End Location
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}
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// IsSet returns if this LocationRange has been set.
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func (lr *LocationRange) IsSet() bool {
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return lr.Begin.IsSet()
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}
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func (lr *LocationRange) String() string {
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if !lr.IsSet() {
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return lr.FileName
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}
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var filePrefix string
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if len(lr.FileName) > 0 {
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filePrefix = lr.FileName + ":"
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}
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if lr.Begin.Line == lr.End.Line {
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if lr.Begin.Column == lr.End.Column {
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return fmt.Sprintf("%s%v", filePrefix, lr.Begin.String())
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}
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return fmt.Sprintf("%s%v-%v", filePrefix, lr.Begin.String(), lr.End.Column)
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}
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return fmt.Sprintf("%s(%v)-(%v)", filePrefix, lr.Begin.String(), lr.End.String())
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}
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// This is useful for special locations, e.g. manifestation entry point.
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func makeLocationRangeMessage(msg string) LocationRange {
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return LocationRange{FileName: msg}
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}
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func makeLocationRange(fn string, begin Location, end Location) LocationRange {
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return LocationRange{FileName: fn, Begin: begin, End: end}
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}
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//////////////////////////////////////////////////////////////////////////////
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// StaticError
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// StaticError represents an error during parsing/lexing some jsonnet.
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type StaticError struct {
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Loc LocationRange
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Msg string
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}
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func makeStaticErrorMsg(msg string) StaticError {
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return StaticError{Msg: msg}
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}
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func makeStaticErrorPoint(msg string, fn string, l Location) StaticError {
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return StaticError{Msg: msg, Loc: makeLocationRange(fn, l, l)}
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}
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func makeStaticError(msg string, lr LocationRange) StaticError {
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return StaticError{Msg: msg, Loc: lr}
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}
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func (err StaticError) Error() string {
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loc := ""
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if err.Loc.IsSet() {
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loc = err.Loc.String()
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}
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return fmt.Sprintf("%v %v", loc, err.Msg)
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}
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