mirror of
https://github.com/google/go-jsonnet.git
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5da57ac417
* Interpreter & runtime - minimal usable version Accomplishments in this commit: * Majority of language features implemented: * Unary operators * Binary operators * Conditionals * Errors * Indexing arrays * Indexing objects * Object inheritance * Imports * Functions * Function calls * There is a quite nice way for creating builtins * Static analyzer is there with most of the functionality * Standard library is included and parts unaffected by missing features work * Some bugs in existing parts fixed * Most positive tests from C++ version pass, the rest is failing mostly due to missing builtins and comprehensions. * Some initial structure was created that should allow more incremental and focused changes in the future PRs. * Some comments/explanations added * Panics translated to a little bit more gentle internal errors (with a link to issues on github). What still sucks: * Stack traces & error messages (there's some stuff in place) * Almost everything is in the same package * Stuff is exported or unexporeted randomly (see above) * Missing a few lexing/parsing features * Missing builtins * Missing support for extvars and top-level-args * Checking function arguments is missing * No clean Go API that commandline and compatibility layer to C can use * No compatibility layer to C * Assertions don't work (desugaring level, assertEquals works). * Manifestation stack traces (and generally it could use some work). * The way environments are constructed is sometimes suboptimal/clumsy.
67 lines
1.6 KiB
Go
67 lines
1.6 KiB
Go
/*
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Copyright 2017 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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// RuntimeError is an error discovered during evaluation of the program
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type RuntimeError struct {
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StackTrace []TraceFrame
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Msg string
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}
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func makeRuntimeError(msg string, stackTrace []TraceFrame) RuntimeError {
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return RuntimeError{
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Msg: msg,
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StackTrace: stackTrace,
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}
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}
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func (err RuntimeError) Error() string {
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return "RUNTIME ERROR: " + err.Msg
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}
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// The stack
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// TraceFrame is tracing information about a single frame of the call stack.
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// TODO(sbarzowski) the difference from TraceElement. Do we even need this?
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type TraceFrame struct {
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Loc LocationRange
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Name string
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}
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func traceElementToTraceFrame(trace *TraceElement) TraceFrame {
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tf := TraceFrame{Loc: *trace.loc}
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if trace.context != nil {
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// TODO(sbarzowski) maybe it should never be nil
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tf.Name = trace.context.Name
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} else {
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tf.Name = ""
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}
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return tf
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}
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type TraceContext struct {
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// Human readable name - e.g. function <foo>
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Name string
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}
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// TODO(sbarzowski) better name
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type TraceElement struct {
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loc *LocationRange
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context *TraceContext
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}
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