Compiling OpenGL shaders causes syntax errors - c++

Question

I have two simple shaders (vertex and fragment)
Vertex Shader
#version 330 core
//=============================================
//---[Structs/Vertex Data]---------------------
//=============================================
layout(location = 0) in vec3 vertexPosition_modelspace;
//=============================================
//---[Variables]-------------------------------
//=============================================
uniform mat4 projection;
uniform mat4 view;
//=============================================
//---[Vertex Shader]---------------------------
//=============================================
void main()
{
gl_Position = projection * view * vertexPosition_modelspace;
}
Fragment Shader
#version 330 core
//=============================================
//---[Output Struct]---------------------------
//=============================================
out vec3 colour;
//=============================================
//---[Fragment Shader]-------------------------
//=============================================
void main()
{
colour = vec3(1, 0, 0);
}
I am trying to compile them and I get the following error
error C0000: syntax error, unexpected $undefined, expecting "::" at token "undefined"
I believe this may have something to do with the way I am reading the files. Here is an example for the vertex shader file
std::string VertexShaderCode = FindFileOrThrow(vertex_file_path);
std::ifstream vShaderFile(VertexShaderCode.c_str());
std::stringstream vShaderData;
vShaderData << vShaderFile.rdbuf();
vShaderFile.close();
The file is then compiled using
char const *VertexSourcePointer = VertexShaderCode.c_str();
glShaderSource(VertexShaderID, 1, &VertexSourcePointer , NULL);
glCompileShader(VertexShaderID);
How can I efficiently read in the files and avoid these errors?
EDIT:
Correct compile:
const std::string &shaderText = vShaderData.str();
GLint textLength = (GLint)shaderText.size();
const GLchar *pText = static_cast<const GLchar *>(shaderText.c_str());
glShaderSource(VertexShaderID, 1, &pText, &textLength);
glCompileShader(VertexShaderID);

Answer 1

VertexShaderCode is your filename, not the shader string. That's still in vShaderData. You need to copy the string out of vShaderData, and feed it into glShaderSource.