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package compiler
// This file contains some utility functions related to error handling.
import (
"go/scanner"
"go/token"
"go/types"
"path/filepath"
"tinygo.org/x/go-llvm"
)
// makeError makes it easy to create an error from a token.Pos with a message.
func (c *compilerContext) makeError(pos token.Pos, msg string) types.Error {
return types.Error{
Fset: c.program.Fset,
Pos: pos,
Msg: msg,
}
}
func (c *compilerContext) addError(pos token.Pos, msg string) {
c.diagnostics = append(c.diagnostics, c.makeError(pos, msg))
}
// errorAt returns an error value at the location of the instruction.
// The location information may not be complete as it depends on debug
// information in the IR.
func errorAt(inst llvm.Value, msg string) scanner.Error {
return scanner.Error{
Pos: getPosition(inst),
Msg: msg,
}
}
// getPosition returns the position information for the given value, as far as
// it is available.
func getPosition(val llvm.Value) token.Position {
if !val.IsAInstruction().IsNil() {
loc := val.InstructionDebugLoc()
if loc.IsNil() {
return token.Position{}
}
file := loc.LocationScope().ScopeFile()
return token.Position{
Filename: filepath.Join(file.FileDirectory(), file.FileFilename()),
Line: int(loc.LocationLine()),
Column: int(loc.LocationColumn()),
}
} else if !val.IsAFunction().IsNil() {
loc := val.Subprogram()
if loc.IsNil() {
return token.Position{}
}
file := loc.ScopeFile()
return token.Position{
Filename: filepath.Join(file.FileDirectory(), file.FileFilename()),
Line: int(loc.SubprogramLine()),
}
} else {
return token.Position{}
}
}
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